Molecular Physiology of the Neuronal Synapse

Increased cognitive power in sophisticated vertebrates is linked to an expansion of synaptic protein diversity, particularly scaffold proteins.

“Evolutionary analyses suggest that the increased cognitive power in sophisticated vertebrates is linked to an expansion of synaptic protein diversity, particularly scaffold proteins, which mediate the precise organization of presynaptic release sites and postsynaptic receptors.”

• cites [7] Nithianantharajah, 2013, Synaptic scaffold evolution generated components of vertebrate cognitive complexity, Nat. Neurosci. sourceSupported
• cites [8] Orvis, 2022, The evolution of synaptic and cognitive capacity: Insights from the nervous system transcriptome of Aplysia, Proc. Natl. Acad. Sci. USA sourceDisputed

  The paper describes the proposed link between cognitive capacity and expanded synaptic protein diversity, but its Abstract says its results challenge that hypothesis. In the Discussion (“Complexity of the Synaptic Proteome during Evolution”), comparisons involving zebrafish, humans, Octopus, and Aplysia lead the authors to conclude that greater nervous-system complexity is neither a direct consequence of, nor dependent on, greater synaptic protein diversity. The Abstract does support the sentence’s description of what scaffold proteins do. (LLM, conf=0.90)

  Checked by a reasoning model — may be wrong.

  Experimental — accuracy not yet measured

Synaptic proteome diversity is specifically shaped by the levels of glutamate receptors and their associated regulatory proteins, allowing for a molecular classification that extends beyond connectivity.

“Recently, it has been shown that synaptic proteome diversity is specifically shaped by the levels of glutamate receptors and their associated regulatory proteins, allowing for a molecular classification that extends beyond connectivity [5].”

• cites [5] Picanol, 2025, Synaptic proteome diversity is shaped by the levels of glutamate receptors and their regulatory proteins, Nat. Commun. sourcePartly supported

  The Discussion reports that glutamate receptors and proteins controlling their function are common drivers of proteomic variability among synapses in the mouse hippocampal trisynaptic circuit. But the Introduction defines synaptic types in this study by their pre- and postsynaptic neuronal pair; it does not establish a molecular classification of synapses beyond connectivity. (LLM, conf=0.86)

  Experimental — accuracy not yet measured

Synaptic strength is modified during long-term potentiation (LTP) and depression (LTD) through signaling cascades involving kinases like CaMKII, PKA, and PKC, or phosphatases such as PP1 and calcineurin.

“Synaptic strength is modified during long-term potentiation (LTP) and depression (LTD) through signaling cascades involving kinases like CaMKII, PKA, and PKC, or phosphatases such as PP1 and calcineurin.”

• cites [45] Khan, 2025, AMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases, Cell. Mol. Neurobiol. sourceSupported

Following exocytosis, synaptic vesicles are recovered through clathrin-mediated, ultrafast, bulk, or kiss-and-run endocytic pathways.

“Following exocytosis, synaptic vesicles are recovered through clathrin-mediated, ultrafast, bulk, or kiss-and-run endocytic pathways.”

• Also stated in: § 2.3. Synaptic Vesicle Recycling Pathways · plain

  “Several distinct endocytic pathways operate at the presynaptic terminal, each with characteristic kinetics and molecular machinery.”

• cites [30] Saheki, 2012, Synaptic vesicle endocytosis, Cold Spring Harb. Perspect. Biol. sourcePartly supported

  The paper’s introductory discussion describes clathrin-mediated and bulk endocytosis and presents kiss-and-run as a possible third pathway. The KISS AND RUN section says its evidence remains primarily indirect, and our copy does not identify ultrafast endocytosis as a separate pathway (searched: “ultrafast” and “ultra-fast”). (LLM, conf=0.88)

  Experimental — accuracy not yet measured
• cites [31] Imoto, 2025, Beyond Clathrin: Decoding the Mechanism of Ultrafast Endocytosis, Physiology sourceSupported
• cites [32] Watanabe, 2013, Ultrafast endocytosis at mouse hippocampal synapses, Nature sourcePartly supported

  The Introduction and Discussion describe clathrin-mediated and kiss-and-run endocytosis, and the paper reports ultrafast endocytosis after vesicle fusion. But our copy does not identify bulk endocytosis as a pathway, and the Discussion says ultrafast endocytosis is unlikely to recover intact synaptic vesicles directly. The claim therefore overstates what this source supports. (LLM, conf=0.88)

  Experimental — accuracy not yet measured

The unique properties of individual synapses are regulated through a continuous interplay of bidirectional signals exchanged between the presynaptic and postsynaptic compartments.

“The unique properties of individual synapses are regulated through a continuous interplay of bidirectional signals exchanged between the presynaptic and postsynaptic compartments [3,4].”

• cites [3] Sudhof, 2018, Towards an Understanding of Synapse Formation, Neuron sourceSupported
• cites [4] Schuman, 2025, Understanding the molecular diversity of synapses, Nat. Rev. Neurosci. sourceNot checked — no full text of the source

The presynaptic active zone contains scaffolding proteins including bassoon, piccolo, RIMs, and munc13 that organize vesicle priming and the localization of voltage-gated calcium channels.

“At the presynaptic active zone, scaffolding proteins including bassoon, piccolo, RIMs, and munc13 organize vesicle priming and the localization of voltage-gated calcium channels.”

• Also stated in: § 2.1. Active Zone Organization and Dynamics · plain

  “Their roles include the assembly of active zones, the precise localization of voltage-gated Ca2+ channels near release sites, and synaptic vesicle priming [15,16].”

• Also stated in: § 2.1. Active Zone Organization and Dynamics · plain

  “Rab3-interacting molecules (RIMs) and Munc13 are also essential active zone proteins, playing key roles in synaptic vesicle docking and priming [17].”

• cites [15] Ivanova, 2016, Bassoon and piccolo regulate ubiquitination and link presynaptic molecular dynamics with activity-regulated gene expression, J. Physiol. sourceNot checked — no full text of the source
• cites [16] Gundelfinger, E.D., Reissner, C., and Garner, C.C. (2015). Role of Bassoon and Piccolo in Assembly and Molecular Organization of the Active Zone. Front. Synaptic Neurosci., 7. sourceSupported
• cites [17] Mochida, 2004, Physical and functional interaction of the active zone proteins, CAST, RIM1, and Bassoon, in neurotransmitter release, J. Cell Biol. sourcePartly supported

  The Introduction identifies Bassoon, Piccolo, RIM1, and Munc13-1 as active-zone proteins involved in organizing its structure, and links Munc13-1 to synaptic-vesicle priming. The passages from our copy do not establish that these proteins organize the localization of voltage-gated calcium channels (searched: voltage-gated calcium channels; Ca2+ channels). (LLM, conf=0.86)

  Experimental — accuracy not yet measured

The presynaptic active zone (AZ) is a highly specialized, electron-dense region of the presynaptic membrane crucial for rapid and efficient neurotransmitter release.

“The presynaptic active zone (AZ) is a highly specialized, electron-dense region of the presynaptic membrane crucial for rapid and efficient neurotransmitter release [11,12].”

• cites [11] Nishimune, 2012, Molecular mechanism of active zone organization at vertebrate neuromuscular junctions, Mol. Neurobiol. sourceSupported
• cites [12] Ackermann, 2015, Presynaptic active zones in invertebrates and vertebrates, EMBO Rep. sourceSupported

The identification of large multiprotein complexes associated with NMDA receptors and MAGUK proteins expanded the known synaptic proteome by tenfold.

“The identification of large multiprotein complexes, such as those associated with N-methyl-D-aspartate (NMDA) receptors and membrane-associated guanylate kinase (MAGUK) proteins, expanded the known synaptic proteome by tenfold, opening new avenues for research into synaptic organization and disease [10].”

• cites [10] Grant, 2019, Synapse diversity and synaptome architecture in human genetic disorders, Hum. Mol. Genet. sourceSupported

The postsynaptic density (PSD) serves as a protein hub where scaffolds such as PSD-95, shank, homer, and gephyrin anchor excitatory (AMPA, NMDA) and inhibitory (GABA-A, Glycine) receptors.

“Postsynaptically, the postsynaptic density (PSD) serves as a protein hub where scaffolds such as PSD-95, shank, homer, and gephyrin anchor excitatory (AMPA, NMDA) and inhibitory (GABA-A, Glycine) receptors are observed.”

• Also stated in: § 3.1. Postsynaptic Density (PSD) Structure and Protein Composition · plain

  “The postsynaptic density (PSD) is a highly organized, electron-dense protein complex situated directly beneath the postsynaptic membrane of excitatory synapses [36].”

• cites [36] Sun, 2025, The postsynaptic density in excitatory synapses is composed of clustered, heterogeneous nanoblocks, J. Cell Biol. sourcePartly supported

  The Introduction describes the PSD at excitatory synapses and identifies PSD95 as a postsynaptic scaffolding protein aligned with clustered AMPA receptors. The Results and discussion mention NMDA receptors only as a possible component of some nanoblocks. Our copy does not support the claimed roles of shank, homer, or gephyrin in anchoring the listed receptors, particularly GABA-A and glycine receptors at inhibitory synapses. (LLM, conf=0.88)

  Experimental — accuracy not yet measured

The diversity observed in the properties of synapses cannot be fully predicted solely from their ultrastructure or anatomical location, highlighting the influence of their molecular composition.

“The diversity observed in the properties of synapses cannot be fully predicted solely from their ultrastructure or anatomical location, highlighting the influence of their molecular composition [1,4].”

• cites [1] Sudhof, 2021, The cell biology of synapse formation, J. Cell Biol. sourceSupported
• cites [4] Schuman, 2025, Understanding the molecular diversity of synapses, Nat. Rev. Neurosci. sourceNot checked — no full text of the source

Disruption in priming components can directly impair release efficiency, even if the core fusion machinery remains intact.

“This implies that any disruption in these priming components can directly impair release efficiency, even if the core fusion machinery remains intact [28].”

• cites [28] Bandura, 2025, Dynamin independent mechanism of exo-endocytosis coupling, J. Physiol. sourcePartly supported

  The Figure 1 caption (page not provided) says dynamin depletion reduces the readily releasable vesicle pool and inhibits multivesicular neurotransmission, supporting the general link between disrupted vesicle supply and impaired release. The paper discusses dynamin-dependent endocytosis, not disruption of priming components, and does not establish that the core fusion machinery remains intact or that any priming-component disruption has this effect. (LLM, conf=0.82)

  Experimental — accuracy not yet measured

The extracellular domains of presynaptic calcium channels directly interact with laminin β2, anchoring the presynaptic complex in precise alignment with the postsynaptic machinery.

“The extracellular domains of the presynaptic calcium channels directly interact with laminin β2, anchoring the presynaptic complex in precise alignment with the postsynaptic machinery.”

• cites [11] Nishimune, 2012, Molecular mechanism of active zone organization at vertebrate neuromuscular junctions, Mol. Neurobiol. sourceSupported

Recent in vitro work suggests that the PSD may be dynamically maintained by interactions between a tubulin-containing PSD lattice/backbone and polymerizing microtubules.

“Recent in vitro work suggests that the PSD may be dynamically maintained not only by canonical scaffold assemblies, but also by interactions between a tubulin-containing PSD lattice/backbone and polymerizing microtubules.”

• cites [38] Suzuki, 2025, Tubulin and GTP Are Crucial Elements for Postsynaptic Density Construction and Aggregation, J. Neurochem. sourceSupported

Munc18-1 binds to synaptobrevin and to a "closed" conformation of syntaxin-1, forming a template that guides SNARE complex assembly.

“Munc18-1 binds to synaptobrevin and to a “closed” conformation of syntaxin-1, effectively forming a template that guides SNARE complex assembly [22].”

• cites [22] Rizo, 2018, Mechanism of neurotransmitter release coming into focus, Protein Sci. sourceSupported

RIMs, Munc13, CAST/ELKS, and Bassoon/Piccolo form a large molecular complex in the brain, creating a central interaction node where domains of Piccolo, Bassoon, CAST, and RIM1 converge on the N-terminal of Munc13-1.

“These proteins, along with CAST/ELKS and Bassoon/Piccolo, form a large molecular complex in the brain, creating a central interaction node where domains of Piccolo, Bassoon, CAST, and RIM1 converge on the N-terminal of Munc13-1 [18,19].”

• cites [18] Chua, 2014, Macromolecular complexes at active zones: Integrated nano-machineries for neurotransmitter release, Cell. Mol. Life Sci. sourceSupported
• cites [19] Wang, 2009, A protein interaction node at the neurotransmitter release site: Domains of Aczonin/Piccolo, Bassoon, CAST, and rim converge on the N-terminal domain of Munc13-1, J. Neurosci. sourceSupported

CME typically occurs in the peri-active zone, adjacent to the sites of neurotransmitter release.

“CME typically occurs in the peri-active zone, adjacent to the sites of neurotransmitter release [12,28].”

• cites [12] Ackermann, 2015, Presynaptic active zones in invertebrates and vertebrates, EMBO Rep. sourceSupported
• cites [28] Bandura, 2025, Dynamin independent mechanism of exo-endocytosis coupling, J. Physiol. sourceCould not verify

  The main text discusses synaptic vesicle recycling and components of clathrin-mediated endocytosis, but does not say where CME typically occurs. Searches for the peri-active zone and for CME’s location relative to release sites found no passage addressing that spatial claim. (LLM, conf=0.75)

  Experimental — accuracy not yet measured

RIMs and Munc13 are essential active zone proteins playing key roles in synaptic vesicle docking and priming.

“Rab3-interacting molecules (RIMs) and Munc13 are also essential active zone proteins, playing key roles in synaptic vesicle docking and priming [17].”

• cites [17] Mochida, 2004, Physical and functional interaction of the active zone proteins, CAST, RIM1, and Bassoon, in neurotransmitter release, J. Cell Biol. sourcePartly supported

  The Introduction identifies RIM1 and Munc13-1 as active-zone proteins, and the Discussion reports that their interaction is involved in synaptic-vesicle priming (page numbers unavailable). The Introduction links vesicle docking to Rab3A, not directly to RIM1 or Munc13-1, and describes the latter proteins as implicated in priming rather than establishing that both are essential for docking and priming. (LLM, conf=0.88)

  Experimental — accuracy not yet measured

On the presynaptic side, cytosolic active zone proteins are tightly associated with the cytosolic domains of voltage-dependent calcium channels (P/Q-, N-, and L-type).

“On the presynaptic side, cytosolic active zone proteins are tightly associated with the cytosolic domains of voltage-dependent calcium channels (P/Q-, N-, and L-type) [11].”

• cites [11] Nishimune, 2012, Molecular mechanism of active zone organization at vertebrate neuromuscular junctions, Mol. Neurobiol. sourceSupported

The number, size, and distribution of active zones profoundly influence how information is processed within a neuronal circuit and how the circuit adapts to internal or external cues.

“The number, size, and distribution of active zones profoundly influence how information is processed within a neuronal circuit and how the circuit adapts to internal or external cues [14].”

• cites [14] Clarke, G.L., Chen, J., and Nishimune, H. (2012). Presynaptic Active Zone Density during Development and Synaptic Plasticity. Front. Mol. Neurosci., 5. sourceSupported

The molecular switch shifting retrieval toward ultrafast endocytosis is primarily mechanical, driven by a 'membrane compression model' where fused synaptic vesicles exert lateral pressure against an F-actin-enriched stiff periactive zone, inducing rapid membrane buckling and curvature independent of clathrin recruitment.

“The molecular switch shifting retrieval toward ultrafast endocytosis is primarily mechanical, driven by a ‘membrane compression model’ where fused synaptic vesicles exert lateral pressure against an F-actin-enriched stiff periactive zone, inducing rapid membrane buckling and curvature independent of clathrin recruitment [31,34].”

• cites [31] Imoto, 2025, Beyond Clathrin: Decoding the Mechanism of Ultrafast Endocytosis, Physiology sourcePartly supported

  The Introduction’s “Kinetics and molecular mechanisms” section describes the proposed membrane-compression model: fused vesicles laterally compress an F-actin-enriched region, producing curvature akin to buckling. It also says early initiation is likely mechanical and that ultrafast endocytosis is clathrin-independent. But it presents compression as one of two potential models, not an established molecular switch that primarily drives the shift to ultrafast retrieval. The supplied passages have no page numbers. (LLM, conf=0.86)

  Experimental — accuracy not yet measured
• cites [34] Ogunmowo, 2023, Membrane compression by synaptic vesicle exocytosis triggers ultrafast endocytosis, Nat. Commun. sourceSupported

Key molecular players that regulate active zone density include extracellular matrix laminins, voltage-dependent calcium channels, amyloid precursor proteins, the small GTPase Rab3, endocytosis mechanisms involving synaptojanin, and cytoskeletal proteins such as spectrins and β-adducin.

“Key molecular players that regulate active zone density include extracellular matrix laminins, voltage-dependent calcium channels, amyloid precursor proteins, the small GTPase Rab3, endocytosis mechanisms involving synaptojanin, and cytoskeletal proteins such as spectrins and β-adducin [14].”

• cites [14] Clarke, G.L., Chen, J., and Nishimune, H. (2012). Presynaptic Active Zone Density during Development and Synaptic Plasticity. Front. Mol. Neurosci., 5. sourceSupported

The core anchoring of voltage-gated calcium channels via RIM and RIM-BP scaffolds is a universal feature across all central synapse types, ensuring fast neurotransmission regardless of neurotransmitter identity.

“While this specific interaction is a key organizer at the neuromuscular junction and many central excitatory synapses, current evidence suggests that the core anchoring of voltage-gated calcium channels via RIM and RIM-BP scaffolds is a universal feature across all central synapse types, ensuring fast neurotransmission regardless of the neurotransmitter identity [1,13].”

• cites [1] Sudhof, 2021, The cell biology of synapse formation, J. Cell Biol. sourceSupported
• cites [13] Kim, 2025, Synaptic Vesicle Recycling at the Developing Presynapse, J. Neurochem. sourcePartly supported

  The Introduction (page unavailable) says voltage-gated calcium channels are anchored at active zones by scaffolding molecules, placing them close to release machinery. The section on Coupling of Calcium Influx to SV Fusion (page unavailable) links tighter coupling to higher-fidelity, more synchronous transmission, but says its degree varies by synapse type. Our copy does not identify RIM and RIM-BP as the anchoring scaffolds or establish that this mechanism is universal across all central synapses regardless of neurotransmitter identity. (LLM, conf=0.86)

  Experimental — accuracy not yet measured

Following fusion, the SNARE complex is disassembled by NSF and SNAPs, allowing SNARE proteins to be recycled.

“Following fusion, the SNARE complex is disassembled by the N-ethylmalemaleimide sensitive factor (NSF) and soluble NSF attachment proteins (SNAPs), allowing the SNARE proteins to be recycled for subsequent rounds of neurotransmitter release [22].”

• cites [22] Rizo, 2018, Mechanism of neurotransmitter release coming into focus, Protein Sci. sourceSupported

Munc13-1 facilitates SNARE complex assembly by bridging the synaptic vesicle and plasma membranes.

“Munc13-1 further facilitates this assembly process by bridging the synaptic vesicle and plasma membranes.”

• cites [22] Rizo, 2018, Mechanism of neurotransmitter release coming into focus, Protein Sci. sourceSupported

During a single LTP event, heterogeneity is resolved through rapid structural remodeling where 'nascent zones' are converted into functional active zones within 5 min via recruitment of dense-core vesicles.

“During a single LTP event, this heterogeneity is resolved through rapid structural remodeling where ‘nascent zones’ are converted into functional active zones within 5 min via the recruitment of dense-core vesicles, representing a high turnover rate of these nanoblocks to saturate potentiation capacity [36,37].”

• cites [36] Sun, 2025, The postsynaptic density in excitatory synapses is composed of clustered, heterogeneous nanoblocks, J. Cell Biol. sourcePartly supported

  The Results and discussion section reports heterogeneous postsynaptic nanoblocks and possible unoccupied release sites. It does not report a single LTP event, conversion of nascent zones into active zones within 5 minutes, or recruitment of dense-core vesicles; searches for those terms found no supporting passage. Our copy provides no page numbers for these sections. (LLM, conf=0.84)

  Experimental — accuracy not yet measured
• cites [37] Harris, 2024, Synapse-specific structural plasticity that protects and refines local circuits during LTP and LTD, Philos. Trans. R. Soc. Lond. B Biol. Sci. sourcePartly supported

  Section 4 reports that dense-core vesicles are recruited by 5 min after LTP induction and can fill a nascent zone, converting it to an active zone. It does not establish that conversion is complete within 5 min: nascent-zone frequency was unchanged at that point and diminished by 30 min. Section 9 describes conversion as occurring 'within minutes' but gives no five-minute deadline. (LLM, conf=0.86)

  Experimental — accuracy not yet measured

Calcium ions play a fundamental regulatory role in orchestrating diverse endocytic processes across different synapse types.

“Calcium ions play a fundamental regulatory role in orchestrating these diverse endocytic processes across different synapse types [12].”

• cites [12] Ackermann, 2015, Presynaptic active zones in invertebrates and vertebrates, EMBO Rep. sourceSupported

Functional NMDARs are heterotetramers composed of two obligatory GluN1 subunits and two GluN2 (GluN2A-D) or GluN3 subunits.

“Functional NMDARs are heterotetramers composed of two obligatory GluN1 subunits and two GluN2 (GluN2A-D) or GluN3 subunits.”

• cites [48] Vieira, 2020, Regulation of NMDA glutamate receptor functions by the GluN2 subunits, J. Neurochem. sourceSupported

The precise number, subtype, and localization of glutamate receptors at the postsynaptic membrane are dynamically regulated through complex trafficking mechanisms, which are crucial for synaptic plasticity and cognitive functions like learning and memory.

“The precise number, subtype, and localization of glutamate receptors at the postsynaptic membrane are dynamically regulated through complex trafficking mechanisms, which are crucial for synaptic plasticity and cognitive functions like learning and memory [45].”

• cites [45] Khan, 2025, AMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases, Cell. Mol. Neurobiol. sourcePartly supported

  Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

  Experimental — accuracy not yet measured

Disruptions in the hierarchical assembly of proteins within the "synaptome architecture" can lead to widespread behavioral phenotypes.

“Disruptions in the hierarchical assembly of proteins within the “synaptome architecture” can lead to widespread behavioral phenotypes, highlighting the PSD as a critical target for understanding and treating complex neurological and psychiatric conditions [10].”

• cites [10] Grant, 2019, Synapse diversity and synaptome architecture in human genetic disorders, Hum. Mol. Genet. sourceSupported

Protein 4.1N interacts with SynCAM1 and phosphorylated GluA1 (S818) to facilitate AMPAR recruitment and exocytosis.

“Protein 4.1N, abundant in dendritic spines, interacts with SynCAM1 and phosphorylated GluA1 (S818) to facilitate AMPAR recruitment and exocytosis [45].”

• cites [45] Khan, 2025, AMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases, Cell. Mol. Neurobiol. sourceSupported

Arc plays a critical role in AMPAR endocytosis during LTD and homeostatic scaling down by having a higher affinity for dephosphorylated TARP and facilitating endocytosis via AP2 and endophilin.

“Arc (activity-regulated cytoskeleton-associated protein) plays a critical role in AMPAR endocytosis during LTD and homeostatic scaling down by having a higher affinity for dephosphorylated TARP and facilitating endocytosis via AP2 and endophilin [45].”

• cites [45] Khan, 2025, AMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases, Cell. Mol. Neurobiol. sourceSupported

LTD is characterized by the removal of GluA1-containing AMPARs from the synaptic surface.

“Conversely, LTD is characterized by the removal of GluA1-containing AMPARs from the synaptic surface.”

• cites [45] Khan, 2025, AMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases, Cell. Mol. Neurobiol. sourceSupported

The Gs/cAMP/PKA cascade, often triggered by adhesion-GPCRs like latrophilins, is essential for initial AMPAR surface recruitment by facilitating the insertion of receptor packets.

“The Gs/cAMP/PKA cascade, often triggered by adhesion-GPCRs like latrophilins, is essential for initial AMPAR surface recruitment by facilitating the insertion of receptor packets, whereas Gq/PLC/PKC signaling events, modulated by group I metabotropic glutamate receptors (mGluR1/5), orchestrate receptor exocytosis and structural remodeling [1].”

• cites [1] Sudhof, 2021, The cell biology of synapse formation, J. Cell Biol. sourcePartly supported

  The “Signal transduction cascades organize synapses” section says latrophilin GPCR activity produces cAMP and is essential for synapse formation. It does not establish that a Gs/cAMP/PKA cascade is essential for initial AMPAR surface recruitment or inserts receptor packets; the section says little else is known about the intracellular signals involved. The cited passages also do not support the sentence’s Gq/PLC/PKC and mGluR1/5 mechanism. (LLM, conf=0.86)

  Experimental — accuracy not yet measured

Phosphorylation of GluA1 at S831 and TARPs promotes AMPAR trapping at the synaptic surface, leading to synaptic strengthening.

“This phosphorylation enhances AMPAR single-channel conductance and promotes their trapping at the synaptic surface, leading to synaptic strengthening [45].”

• cites [45] Khan, 2025, AMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases, Cell. Mol. Neurobiol. sourceSupported

During LTP induction, GluA1-containing AMPARs are rapidly incorporated into the synaptic surface of excitatory synapses.

“During LTP induction, GluA1-containing AMPARs are rapidly incorporated into the synaptic surface of excitatory synapses.”

• cites [45] Khan, 2025, AMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases, Cell. Mol. Neurobiol. sourceSupported

GluA1-containing AMPARs undergo lateral diffusion through the membrane to enter the postsynaptic density, where their retention is facilitated by interactions with PSD-95 via TARPs.

“These receptors then undergo lateral diffusion through the membrane to enter the postsynaptic density (PSD), where their retention is facilitated by interactions with PSD-95 via transmembrane AMPA receptor regulatory proteins (TARPs) [45].”

• cites [45] Khan, 2025, AMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases, Cell. Mol. Neurobiol. sourceSupported

PSD-95 assumes the synaptic trafficking function during synapse maturation, including the replacement of NR2B-NMDARs with NR2A-NMDARs.

“Notably, SAP102 mediates the synaptic trafficking of both AMPA and NMDA receptors during early synaptogenesis [49], while PSD-95 assumes this function during synapse maturation, including the crucial replacement of NR2B-NMDARs with NR2A-NMDARs [40,50].”

• cites [40] Elias, 2008, Differential trafficking of AMPA and NMDA receptors by SAP102 and PSD-95 underlies synapse development, Proc. Natl. Acad. Sci. USA sourceNot checked — no full text of the source
• cites [50] Anderson, 2025, Trans-synaptic molecular context of NMDA receptor nanodomains, Nat. Commun. sourcePartly supported

  The Discussion (page unavailable) reports that GluN2A may bind PSD-95 preferentially over GluN2B and discusses NMDAR composition in mature synapses. It does not say that PSD-95 takes over synaptic receptor trafficking during maturation or causes NR2B-containing NMDARs to be replaced by NR2A-containing NMDARs. (LLM, conf=0.83)

  Experimental — accuracy not yet measured

The exocytosis of GluA1-containing AMPARs to the perisynaptic surface involves the motor protein Myosin Vb, which transports endosomes containing these receptors via Rab11 and its effector Rab11-FIP2.

“The exocytosis of GluA1-containing AMPARs to the perisynaptic surface involves the motor protein Myosin Vb, which transports endosomes containing these receptors via Rab11 and its effector Rab11-FIP2 [45].”

• cites [45] Khan, 2025, AMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases, Cell. Mol. Neurobiol. sourceSupported

Gq/PLC/PKC signaling events, modulated by group I metabotropic glutamate receptors (mGluR1/5), orchestrate receptor exocytosis and structural remodeling.

“The Gs/cAMP/PKA cascade, often triggered by adhesion-GPCRs like latrophilins, is essential for initial AMPAR surface recruitment by facilitating the insertion of receptor packets, whereas Gq/PLC/PKC signaling events, modulated by group I metabotropic glutamate receptors (mGluR1/5), orchestrate receptor exocytosis and structural remodeling [1].”

• cites [1] Sudhof, 2021, The cell biology of synapse formation, J. Cell Biol. sourceCould not verify

  The “Signal transduction cascades organize synapses” section discusses latrophilin-dependent cAMP production but says little is known about the intracellular signals that induce synapses. Searches for Gq/PLC/PKC, mGluR1/5, receptor exocytosis, and structural remodeling found no passage linking them as claimed. The indexed passages provide section labels but no page numbers. (LLM, conf=0.75)

  Experimental — accuracy not yet measured

The dynamic addition of proteins like CaMKII to the pallium during intense synaptic activity demonstrates the PSD's adaptability, influencing spine morphology and receptor trafficking.

“The dynamic addition of proteins like CaMKII to the pallium during periods of intense synaptic activity further demonstrates the PSD’s adaptability, influencing spine morphology and receptor trafficking [39].”

• cites [39] Dosemeci, A., Weinberg, R.J., Reese, T.S., and Tao-Cheng, J.H. (2016). The Postsynaptic Density: There Is More than Meets the Eye. Front. Synaptic Neurosci., 8. sourcePartly supported

  The section on activity-induced changes reports CaMKII accumulation at the pallium under intense synaptic activity, and the Conclusion links it to receptor trafficking and the actin cytoskeleton. But the Conclusion says these events *could* synchronize receptor trafficking with changes in spine morphology; the claim presents that influence more definitively than the paper does. (LLM, conf=0.83)

  Experimental — accuracy not yet measured

PSD-95 and related MAGUK molecules form a dense matrix that provides a stable platform for the postsynaptic apparatus, supported by interactions with GKAP.

“PSD-95, along with other related MAGUK molecules, forms a dense matrix that provides a stable platform for the entire postsynaptic apparatus. This platform is further supported by interactions with proteins like GKAP (guanylate kinase-associated protein), which forms an interface between PSD-95 and deeper PSD layers [39].”

• cites [39] Dosemeci, A., Weinberg, R.J., Reese, T.S., and Tao-Cheng, J.H. (2016). The Postsynaptic Density: There Is More than Meets the Eye. Front. Synaptic Neurosci., 8. sourcePartly supported

  The Core Layer of the PSD section describes a dense PSD-95/MAGUK matrix capped by GKAPs as a stable platform for the subjacent pallium, with GKAP potentially providing an interface between the core and pallium. The claim extends that platform to the entire postsynaptic apparatus, which the passage does not establish. (LLM, conf=0.87)

  Experimental — accuracy not yet measured

CaMKII activated by calcium influx during LTP phosphorylates GluA1 at the S831 site and TARPs at S277 and S281 sites.

“Thus, CaMKII, activated by calcium influx during LTP, phosphorylates GluA1 at the S831 site and TARPs at S277 and S281 sites.”

• cites [45] Khan, 2025, AMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases, Cell. Mol. Neurobiol. sourcePartly supported

  The ‘AMPA Receptors in Hebbian Forms of Plasticity’ section says LTP-induced calcium influx activates CaMKII, which phosphorylates GluA1 at S831 and auxiliary proteins including TARPs. It identifies S277 and S281 specifically as sites on TARPγ8, so the claim is broader than the source if ‘TARPs’ means the family generally. (LLM, conf=0.82)

  Experimental — accuracy not yet measured

Synaptic transmission and plasticity are fundamentally tuned by GPCR-mediated neuromodulation.

“Additionally, synaptic transmission and plasticity are fundamentally tuned by GPCR-mediated neuromodulation.”

• cites [1] Sudhof, 2021, The cell biology of synapse formation, J. Cell Biol. sourcePartly supported

  In “Synapses: Fundamental computational units that wire circuits” (page unavailable), the review says neuromodulatory signals control neural circuits and amplify the complexity of synaptic information processing. It does not attribute tuning of both synaptic transmission and plasticity to GPCR-mediated neuromodulation; its discussion of latrophilins as GPCRs in “SAMs and synaptic specificity” concerns synapse formation instead. (LLM, conf=0.85)

  Experimental — accuracy not yet measured

NMDAR trafficking is a complex process involving biosynthesis, dendritic transport, exocytosis, lateral diffusion, endocytosis, recycling, and degradation, all tightly controlled by protein-protein interactions involving the cytoplasmic carboxyl termini of NMDAR subunits.

“NMDAR trafficking is a complex process involving biosynthesis, dendritic transport, exocytosis, lateral diffusion, endocytosis, recycling, and degradation, all tightly controlled by protein–protein interactions involving the cytoplasmic carboxyl termini (CTDs) of NMDAR subunits [48].”

• cites [48] Vieira, 2020, Regulation of NMDA glutamate receptor functions by the GluN2 subunits, J. Neurochem. sourceSupported

Phosphorylation of GluA1 at S831 and TARPs enhances AMPAR single-channel conductance.

“This phosphorylation enhances AMPAR single-channel conductance and promotes their trapping at the synaptic surface, leading to synaptic strengthening [45].”

• cites [45] Khan, 2025, AMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases, Cell. Mol. Neurobiol. sourcePartly supported

  In “AMPA Receptors in Hebbian Forms of Plasticity,” the paper states that GluA1 S831 phosphorylation increases single-channel conductance. The same section says TARP phosphorylation facilitates trapping of GluA1-containing AMPA receptors at the synaptic surface, but does not say that TARP phosphorylation increases single-channel conductance. (LLM, conf=0.88)

  Experimental — accuracy not yet measured

NMDARs are not a homogeneous group.

“The distinct biophysical properties and spatiotemporal expression patterns of different GluN2 subunits emphasize that NMDARs are not a homogeneous group [48].”

• cites [48] Vieira, 2020, Regulation of NMDA glutamate receptor functions by the GluN2 subunits, J. Neurochem. sourceSupported

SAP102 mediates the synaptic trafficking of both AMPA and NMDA receptors during early synaptogenesis.

“Notably, SAP102 mediates the synaptic trafficking of both AMPA and NMDA receptors during early synaptogenesis [49], while PSD-95 assumes this function during synapse maturation, including the crucial replacement of NR2B-NMDARs with NR2A-NMDARs [40,50].”

• cites [49] Qi, C., Luo, L.D., Feng, I., and Ma, S. (2022). Molecular mechanisms of synaptogenesis. Front. Synaptic Neurosci., 14. sourceCould not verify

  In the 'Identification of synaptic components and their interactomes' section (page unavailable), the review names SAP102 as a discovered synaptic protein. Its References section (page unavailable) lists a study whose title says SAP102 interacts with NMDA receptor complexes, but our copy does not say SAP102 mediates trafficking of either NMDA or AMPA receptors during early synaptogenesis. Searched for SAP102 and early receptor trafficking. (LLM, conf=0.76)

  Experimental — accuracy not yet measured

The neuron precisely controls synaptic strength by fine-tuning the composition and number of AMPARs at the postsynapse through a complex, multi-faceted regulatory network.

“The detailed mechanisms involving different phosphorylation sites and interacting proteins (CaMKII, PKA, PKC, Myosin Vb, Protein 4.1N, SAP97, Arc, protein interacting with C kinase 1 (PICK1), adaptor protein-2 (AP2) complex) during exocytosis, lateral diffusion, and endocytosis highlight that the neuron precisely controls synaptic strength by fine-tuning the composition and number of AMPARs at the”

• cites [45] Khan, 2025, AMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases, Cell. Mol. Neurobiol. sourceSupported

NMDARs exhibit lateral diffusion on the plasma membrane, moving between synaptic and extrasynaptic sites.

“NMDARs exhibit lateral diffusion on the plasma membrane, moving between synaptic and extrasynaptic sites [48].”

• cites [48] Vieira, 2020, Regulation of NMDA glutamate receptor functions by the GluN2 subunits, J. Neurochem. sourceSupported

GluA2 subunits are internalized during LTD via PKCα-mediated phosphorylation at the S880 site, which disrupts their binding to GRIP1.

“GluA2 subunits are also internalized during LTD, a process involving PKCα-mediated phosphorylation at the S880 site, which disrupts their binding to GRIP1.”

• cites [45] Khan, 2025, AMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases, Cell. Mol. Neurobiol. sourceSupported

In the context of excitotoxicity, DAPK1 is recruited to extrasynaptic GluN2B-containing NMDARs.

“In the context of excitotoxicity, particularly relevant in neurological disorders, death-associated protein kinase 1 (DAPK1) is recruited to extrasynaptic GluN2B-containing NMDARs [48].”

• cites [48] Vieira, 2020, Regulation of NMDA glutamate receptor functions by the GluN2 subunits, J. Neurochem. sourceSupported

Gephyrin phosphorylation within its central C-domain recruits the prolyl-isomerase Pin1, triggering conformational changes that modulate the gephyrin lattice's oligomerization.

“Specifically, gephyrin phosphorylation within its central C-domain recruits the prolyl-isomerase Pin1, triggering conformational changes that modulate the gephyrin lattice’s oligomerization.”

• cites [58] Herweg, 2012, Splice-specific glycine receptor binding, folding, and phosphorylation of the scaffolding protein gephyrin, J. Biol. Chem. sourcePartly supported

  The paper’s introductory passage says phosphorylation of C-domain residues Ser-188, Ser-194, and Ser-200 recruits Pin1 and alters gephyrin’s conformation, enhancing receptor binding. The Discussion links C-domain phosphorylation more broadly to oligomerization, but does not say that Pin1-induced conformational changes modulate lattice oligomerization. No page number is available in our copy. (LLM, conf=0.88)

  Experimental — accuracy not yet measured

Synaptic retention of GluN2A requires its CTD for stable interactions with PDZ domain-containing scaffolding molecules like PSD-95.

“Synaptic retention of GluN2A requires its CTD for stable interactions with PDZ domain-containing scaffolding molecules like PSD-95.16”

• cites [16] Gundelfinger, E.D., Reissner, C., and Garner, C.C. (2015). Role of Bassoon and Piccolo in Assembly and Molecular Organization of the Active Zone. Front. Synaptic Neurosci., 7. sourceCould not verify

  The paper’s “Synapse Maintenance and integrity” section discusses the presynaptic roles of Bassoon and Piccolo, not GluN2A retention. Searches for GluN2A, its C-terminal domain, PDZ scaffolds, and PSD-95 found no passage in our copy addressing the claimed interaction; the nearby matches are references, not evidence for the claim. No page number is available for the cited section. (LLM, conf=0.76)

  Experimental — accuracy not yet measured

CaMKII is critically involved in NMDAR-dependent LTP.

“CaMKII, a highly abundant protein enriched in the PSD, is critically involved in NMDAR-dependent LTP [51,52].”

• cites [51] Lisman, 2002, The molecular basis of CaMKII function in synaptic and behavioural memory, Nat. Rev. Neurosci. sourceNot checked — no full text of the source
• cites [52] Lisman, 2012, Mechanisms of CaMKII action in long-term potentiation, Nat. Rev. Neurosci. sourceSupported

Sorting Nexin 27 (SNX27) is implicated in regulating NMDAR recycling from endosomes back to the plasma membrane.

“Sorting Nexin 27 (SNX27) is also implicated in regulating NMDAR recycling from endosomes back to the plasma membrane [48,50].”

• cites [48] Vieira, 2020, Regulation of NMDA glutamate receptor functions by the GluN2 subunits, J. Neurochem. sourceSupported
• cites [50] Anderson, 2025, Trans-synaptic molecular context of NMDA receptor nanodomains, Nat. Commun. sourceCould not verify

  The Results section describes surface labeling and localization of NMDAR subunits, but does not address SNX27-mediated recycling. Searches for SNX27 and for endosomal recycling to the plasma membrane found no passage supporting the attributed claim in our copy. (LLM, conf=0.75)

  Experimental — accuracy not yet measured

Spatial segregation allows independent release sites to activate unique ratios of NMDAR subunits, expanding the computational capacity of single synapses.

“This spatial segregation allows independent release sites to activate unique ratios of NMDAR subunits, expanding the computational capacity of single synapses [50].”

• cites [50] Anderson, 2025, Trans-synaptic molecular context of NMDA receptor nanodomains, Nat. Commun. sourcePartly supported

  The Discussion (page not provided) proposes that spatial segregation may let vesicles released at different sites activate unique ratios of GluN2A- and GluN2B-containing receptors, expanding a synapse’s computational potential. The citing sentence presents this proposed effect as established, whereas the source says it 'raises the possibility' and is 'likely.' (LLM, conf=0.88)

  Experimental — accuracy not yet measured

The synaptic localization of GlyRs is critically dependent on their interaction with the postsynaptic scaffolding protein gephyrin.

“The synaptic localization of GlyRs is critically dependent on their interaction with the postsynaptic scaffolding protein gephyrin [58].”

• cites [58] Herweg, 2012, Splice-specific glycine receptor binding, folding, and phosphorylation of the scaffolding protein gephyrin, J. Biol. Chem. sourceSupported

Super-resolution mapping using DNA-PAINT has revealed that NMDARs are typically absent from the region immediately opposing Munc13-1 release sites.

“However, super-resolution mapping using DNA-PAINT has revealed that NMDARs are typically absent from the region immediately opposing Munc13-1 release sites.”

• cites [50] Anderson, 2025, Trans-synaptic molecular context of NMDA receptor nanodomains, Nat. Commun. sourceSupported

Genetic mutations or alterations in gephyrin expression are implicated in several disorders, specifically including temporal lobe epilepsy, autism, and Alzheimer's disease.

“Genetic mutations or alterations in gephyrin expression are implicated in several disorders, specifically including temporal lobe epilepsy, as well as autism and Alzheimer’s disease [59].”

• cites [59] Pizzarelli, 2020, Tuning GABAergic Inhibition: Gephyrin Molecular Organization and Functions, Neuroscience sourceSupported

The full complement of proteins interacting with native GlyRs remains largely unknown, with fewer than 20 potential interactors identified to date compared to other neurotransmitter receptors.

“Despite these advancements, the full complement of proteins interacting with native GlyRs remains largely unknown, with fewer than 20 potential interactors identified to date compared to other neurotransmitter receptors [62].”

• cites [62] Fraser, 2025, Milestone Review: Unlocking the Proteomics of Glycine Receptor Complexes, J. Neurochem. sourceSupported

Gephyrin post-translational modifications modulate its affinity for GABAergic and glycinergic receptors, thus balancing inhibitory stability with plastic remodeling.

“These modulate its affinity for GABAergic and glycinergic receptors, thus balancing inhibitory stability with plastic remodeling [57,58,59,60].”

• cites [57] George, 2022, Recruitment of Plasma Membrane GABA-A Receptors by Submembranous Gephyrin/Collybistin Clusters, Cell. Mol. Neurobiol. sourceNot checked — no full text of the source
• cites [58] Herweg, 2012, Splice-specific glycine receptor binding, folding, and phosphorylation of the scaffolding protein gephyrin, J. Biol. Chem. sourcePartly supported

  The paper’s introductory discussion (indexed under Abstract; page unavailable) says gephyrin phosphorylation can enhance glycine-receptor binding and that another phosphorylation site modulates GABAergic transmission and gephyrin clustering. It does not establish that these modifications alter gephyrin’s binding affinity for GABAergic receptors, or that affinity changes themselves balance stability with plastic remodeling. The paper discusses scaffold-mediated synaptic stability and plasticity more broadly. (LLM, conf=0.86)

  Experimental — accuracy not yet measured
• cites [59] Pizzarelli, 2020, Tuning GABAergic Inhibition: Gephyrin Molecular Organization and Functions, Neuroscience sourcePartly supported

  In the Introduction (‘Gephyrin at inhibitory synapses: features, regulations and roles’; page not provided), the review says gephyrin binds both GABAA and glycine receptors and that phosphorylation affects GABAA receptor dynamics and synaptic stabilization. It also links gephyrin to inhibitory plasticity. The cited passages do not establish that gephyrin’s post-translational modifications modulate its binding affinity for both receptor types; that specific mechanism is unsupported. (LLM, conf=0.84)

  Experimental — accuracy not yet measured

Calcium influx into the dendritic spine is the critical trigger for LTP.

“This calcium influx is the critical trigger for LTP.”

• cites [53] Nicoll, 2023, Synaptic memory and CaMKII, Physiol. Rev. sourceSupported

NMDARs function as coincidence detectors, requiring both presynaptic glutamate release and sufficient postsynaptic depolarization to relieve their magnesium block and allow calcium influx into the dendritic spine.

“NMDARs function as “coincidence detectors,” requiring both presynaptic glutamate release and sufficient postsynaptic depolarization to relieve their magnesium block and allow for calcium influx into the dendritic spine.”

• cites [53] Nicoll, 2023, Synaptic memory and CaMKII, Physiol. Rev. sourceSupported

CaMKII also plays a role in the later stages of LTP by contributing to structural changes in the synapse, including the remodeling of the actin cytoskeleton within dendritic spines.

“Beyond these functional changes, CaMKII also plays a role in the later stages of LTP by contributing to structural changes in the synapse, including the remodeling of the actin cytoskeleton within dendritic spines [52].”

• cites [52] Lisman, 2012, Mechanisms of CaMKII action in long-term potentiation, Nat. Rev. Neurosci. sourcePartly supported

  The Abstract and Maintenance of long-term potentiation section describe a possible structural role for CaMKII in later LTP and report persistent spine enlargement. The Translocation and binding to the NMDA receptor section links spine enlargement to increased F-actin and CaMKII binding, but describes the F-actin increase as contributing to CaMKII localization—not CaMKII as driving actin remodeling. That specific mechanism is not established by the cited paper. (LLM, conf=0.84)

  Experimental — accuracy not yet measured

The differential calcium signal in LTD activates protein phosphatases, such as protein phosphatase 1 (PP1) and calcineurin (protein phosphatase 2B), which dephosphorylate key synaptic proteins.

“This differential calcium signal activates protein phosphatases, such as protein phosphatase 1 (PP1) and calcineurin (protein phosphatase 2B), which dephosphorylate key synaptic proteins [45].”

• cites [45] Khan, 2025, AMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases, Cell. Mol. Neurobiol. sourceSupported

LTD is associated with the loss of weak AZs, driving synapse shrinkage.

“Conversely, LTD is associated with the loss of weak AZs, driving synapse shrinkage.”

• cites [70] Camus, 2025, Synaptic pruning following NMDAR-dependent LTD preferentially affects isolated synapses, iScience sourcePartly supported

  The Results section (‘NMDAR-dependent long-term depression triggers spine loss within 3 h’; page unavailable) reports that LTD was followed by loss of presynaptic Bassoon labeling and pruning of whole synapses. The Discussion (‘Postsynaptic density-95 reshuffling…’; page unavailable) describes complete loss of the spine, not shrinkage driven specifically by loss of weak active zones. The paper supports LTD-associated synapse loss, but not the claimed selection of weak AZs or that mechanism of shrinkage. (LLM, conf=0.84)

  Experimental — accuracy not yet measured

Emerging evidence suggests a major conceptual shift: the role of CaMKII in LTP maintenance is driven largely by structural rearrangements rather than its enzymatic activity alone.

“Emerging evidence suggests a major conceptual shift: the role of CaMKII in LTP maintenance is driven largely by structural rearrangements rather than its enzymatic activity alone [63].”

• cites [63] Sanhueza, 2013, The CaMKII/NMDAR complex as a molecular memory, Mol. Brain sourceSupported

Three-dimensional reconstructions from electron microscopy reveal that during LTP induction, dense-core vesicles (DCVs) that carry tethered presynaptic vesicles are recruited to silent nascent zones (NZs).

“Three-dimensional reconstructions from electron microscopy reveal that during LTP induction, dense-core vesicles (DCVs) that carry tethered presynaptic vesicles are recruited to silent nascent zones (NZs).”

• cites [37] Harris, 2024, Synapse-specific structural plasticity that protects and refines local circuits during LTP and LTD, Philos. Trans. R. Soc. Lond. B Biol. Sci. sourceSupported

CaMKII phosphorylates TARPs, enhancing the retention of GluA1-containing AMPARs within the PSD by forming a GluA1-TARP-(PSD-95) complex.

“CaMKII also phosphorylates TARPs, enhancing the retention of GluA1-containing AMPARs within the PSD by forming a GluA1-TARP-(PSD-95) complex.”

• cites [45] Khan, 2025, AMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases, Cell. Mol. Neurobiol. sourceSupported

A primary mechanism of LTD involves the removal of AMPA receptors from the postsynaptic membrane.

“A primary mechanism of LTD involves the removal of AMPA receptors from the postsynaptic membrane.”

• cites [45] Khan, 2025, AMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases, Cell. Mol. Neurobiol. sourceSupported

The primary mechanism by which CaMKII mediates early LTP is through the phosphorylation of AMPARs and their auxiliary subunits, such as TARPs.

“The primary mechanism by which CaMKII mediates early LTP is through the phosphorylation of AMPARs) and their auxiliary subunits, such as TARPs.”

• cites [45] Khan, 2025, AMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases, Cell. Mol. Neurobiol. sourcePartly supported

  The “AMPA Receptors in Hebbian Forms of Plasticity” section says CaMKII phosphorylates the GluA1 AMPAR subunit and auxiliary TARPs, linking both to LTP. It does not identify phosphorylation as CaMKII’s primary mechanism or specifically limit that account to early LTP. No page number is available in our copy. (LLM, conf=0.85)

  Experimental — accuracy not yet measured

Autonomous CaMKII mediates opposing forms of plasticity through differential substrate site selection.

“This enables autonomous CaMKII to mediate opposing forms of plasticity through differential substrate site selection [69].”

• cites [69] Coultrap, 2014, Autonomous CaMKII mediates both LTP and LTD using a mechanism for differential substrate site selection, Cell Rep. sourceSupported

Astrocytes participate in LTP by supplying glycine.

“Astrocytes participates in LTP supplying glycine [68].”

• cites [68] Sateesh, 2025, Differential Astrocyte-Supplied NMDAR Co-Agonist for CA1 Versus Dentate Gyrus Long-Term Potentiation, Hippocampus sourceSupported

The induction of LTP at many central synapses, particularly in the hippocampus, is primarily dependent on the activation of NMDARs.

“The induction of LTP at many central synapses, particularly in the hippocampus, is primarily dependent on the activation of NMDARs [53].”

• cites [53] Nicoll, 2023, Synaptic memory and CaMKII, Physiol. Rev. sourceSupported

During LTP, dendritic spines can enlarge and change shape, a process driven by the reorganization of the actin cytoskeleton within the spine.

“During LTP, dendritic spines can enlarge and change shape, a process driven by the reorganization of the actin cytoskeleton within the spine [62].”

• cites [62] Fraser, 2025, Milestone Review: Unlocking the Proteomics of Glycine Receptor Complexes, J. Neurochem. sourceCould not verify

  The section on GlyR β interactors mentions that VPS35 localizes to dendritic spines, while the Introduction links syndapin I to actin cytoskeletal dynamics. Neither passage addresses spine enlargement or shape changes during LTP, or attributes those changes to actin reorganization. Searches for LTP, structural plasticity, and spine morphology found no passage establishing the claim; page numbers were not available in our copy. (LLM, conf=0.76)

  Experimental — accuracy not yet measured

Upon activation, CaMKII acts as a persistent structural seed or molecular tag that captures proteins, such as densin and delta-catenin, required for spine growth and synaptic stabilization.

“Upon activation, CaMKII acts as a persistent structural ‘seed’ or molecular tag that captures proteins, such as densin and delta-catenin, required for spine growth and synaptic stabilization.”

• cites [51] Lisman, 2002, The molecular basis of CaMKII function in synaptic and behavioural memory, Nat. Rev. Neurosci. sourceNot checked — no full text of the source
• cites [52] Lisman, 2012, Mechanisms of CaMKII action in long-term potentiation, Nat. Rev. Neurosci. sourcePartly supported

  In “Translocation and binding to the NMDA receptor” (page unavailable), the paper says activated CaMKII moves to synapses and can remain bound there; it names densin-180 as a binding partner that may hold CaMKII in the postsynaptic density. “Maintenance of long-term potentiation” links active CaMKII to increased spine volume but says the structural process is uncertain. These passages do not establish that CaMKII acts as a persistent seed or tag that captures densin or delta-catenin for spine growth and stabilization; delta-catenin was not found in the searched passages. (LLM, conf=0.88)

  Experimental — accuracy not yet measured
• cites [63] Sanhueza, 2013, The CaMKII/NMDAR complex as a molecular memory, Mol. Brain sourcePartly supported

  In the section on trans-synaptic structural growth (Figure 2), the paper proposes that activated CaMKII forms a persistent complex with NMDAR that acts as a tag and structural seed for binding densin and delta-catenin. It presents this as a working hypothesis, not an established action of CaMKII alone. The same section says that whether densin and delta-catenin are required for synapse growth has not been tested. (LLM, conf=0.86)

  Experimental — accuracy not yet measured

Understanding the identity and roles of GlyR accessory proteins is vital for deciphering GlyR function and dysfunction in health and disease, particularly given the emergence of disease-associated missense mutations in the α1, α2, and β subunit intracellular domains linked to startle disease and neurodevelopmental disorders.

“Understanding the identity and roles of GlyR accessory proteins is vital for deciphering GlyR function and dysfunction in health and disease, particularly given the emergence of disease-associated missense mutations in the α1, α2, and β subunit intracellular domains linked to startle disease (associated with GlyR α1 and β subunits) and neurodevelopmental disorders such as autism, intellectual dis”

• cites [62] Fraser, 2025, Milestone Review: Unlocking the Proteomics of Glycine Receptor Complexes, J. Neurochem. sourcePartly supported

  Split into 2 atoms — 1 confirmed, 0 partially supported, 0 disputed, 0 misattributed, 0 unverifiable, 1 not checked. Expand the claim to see per-atom verdicts.

  Experimental — accuracy not yet measured

Upon activation, CaMKII undergoes autophosphorylation at Thr-286, which renders it constitutively active even after calcium levels return to baseline.

“Upon activation, CaMKII undergoes autophosphorylation at Thr-286, which renders it constitutively active even after calcium levels return to baseline.”

• cites [52] Lisman, 2012, Mechanisms of CaMKII action in long-term potentiation, Nat. Rev. Neurosci. sourceSupported

CaMKII phosphorylates key regulators of actin dynamics, such as kalirin-7 (which activates Rac1) and RhoA, leading to the functional inactivation of cofilin and the addition of actin monomers to growing filaments.

“CaMKII also phosphorylates key regulators of actin dynamics, such as kalirin-7 (which activates Rac1) and RhoA, leading to the functional inactivation of cofilin (an F-actin severing protein) and the addition of actin monomers to growing filaments, respectively.”

• cites [62] Fraser, 2025, Milestone Review: Unlocking the Proteomics of Glycine Receptor Complexes, J. Neurochem. sourceCould not verify

  The Introduction discusses other kinases and an actin-binding protein, while the Collybistin section discusses a RhoGEF; neither describes the claimed pathway. Searches for CaMKII, kalirin-7, Rac1, RhoA, and cofilin found no passage in our copy stating that CaMKII phosphorylates those regulators or causes cofilin inactivation and actin-filament growth. (LLM, conf=0.76)

  Experimental — accuracy not yet measured

The CaMKII complex maintains the on-state of synaptic memory through physical interactions within the PSD, effectively functioning as a structural switch that resists protein turnover.

“This complex maintains the ‘on-state’ of synaptic memory through physical interactions within the PSD, effectively functioning as a structural switch that resists protein turnover [51,52,63,64].”

• cites [51] Lisman, 2002, The molecular basis of CaMKII function in synaptic and behavioural memory, Nat. Rev. Neurosci. sourceNot checked — no full text of the source
• cites [52] Lisman, 2012, Mechanisms of CaMKII action in long-term potentiation, Nat. Rev. Neurosci. sourcePartly supported

  The Maintenance of long-term potentiation section describes a possible persistent, structural role for CaMKII–NMDAR complexes at the PSD. Conclusions and perspectives discusses a model for preserving phosphorylated CaMKII during protein turnover, but treats how synaptic information survives turnover as unresolved. The claim therefore presents a proposed structural mechanism as an established switch that resists turnover. (LLM, conf=0.86)

  Experimental — accuracy not yet measured
• cites [63] Sanhueza, 2013, The CaMKII/NMDAR complex as a molecular memory, Mol. Brain sourcePartly supported

  The section on trans-synaptic structural growth (page not provided) proposes that physical interactions can restore the CaMKII/NMDAR complex despite protein turnover. But it calls this mechanism a hypothesis, and the Abstract says further experiments are needed to establish the complex’s persistence. The claim presents the proposed maintenance mechanism as established. (LLM, conf=0.86)

  Experimental — accuracy not yet measured

NMDAR-dependent LTD also requires CaMKII and its autonomous (calcium-independent) activity.

“Interestingly, recent research indicates that NMDAR-dependent LTD also requires CaMKII and its autonomous (calcium-independent) activity.”

• cites [69] Coultrap, 2014, Autonomous CaMKII mediates both LTP and LTD using a mechanism for differential substrate site selection, Cell Rep. sourceSupported

Both LTP and LTD rely on similar signal transduction cascades that regulate translation initiation.

“Both LTP and LTD rely on similar signal transduction cascades that regulate translation initiation.”

• cites [17] Mochida, 2004, Physical and functional interaction of the active zone proteins, CAST, RIM1, and Bassoon, in neurotransmitter release, J. Cell Biol. sourceCould not verify

  The Results section on RIM1–CAST binding discusses neurotransmitter release and synaptic transmission, not translation initiation. A search of our copy for LTP, LTD, protein synthesis, and signal-transduction cascades found no passage addressing whether both forms of plasticity rely on similar cascades. (LLM, conf=0.75)

  Experimental — accuracy not yet measured

Neighboring synapses displaying coordinated activity act as mutual safeguards against pruning, ensuring that LTD-dependent elimination primarily impacts synapses that do not contribute to network activity responses.

“However, neighboring synapses displaying coordinated activity act as mutual safeguards against pruning, ensuring that LTD-dependent elimination primarily impacts synapses that do not contribute to network activity responses [70].”

• cites [70] Camus, 2025, Synaptic pruning following NMDAR-dependent LTD preferentially affects isolated synapses, iScience sourceSupported

Other kinases, such as protein kinase A and protein kinase C, also contribute to AMPAR trafficking during LTP.

“Other kinases, such as protein kinase A (PKA) and protein kinase C (PKC), also contribute to AMPAR trafficking during LTP.”

• cites [45] Khan, 2025, AMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases, Cell. Mol. Neurobiol. sourceSupported

The interplay between functional and structural changes ensures that synaptic strength is not only modulated but also physically maintained over time.

“This interplay between functional and structural changes ensures that synaptic strength is not only modulated but also physically maintained over time [62].”

• cites [62] Fraser, 2025, Milestone Review: Unlocking the Proteomics of Glycine Receptor Complexes, J. Neurochem. sourcePartly supported

  The sections on gephyrin and other GlyR β interactors describe how synaptic signaling changes receptor–scaffold binding and how accessory proteins affect receptor clustering and mobility. The review thus supports a connection between functional regulation and synaptic structure, but it does not establish that this interplay ensures synaptic strength is physically maintained over time. Page numbers were not available in our copy. (LLM, conf=0.82)

  Experimental — accuracy not yet measured

This coordinated action modifies the equilibrium between actin construction and destruction, facilitating spine expansion.

“This coordinated action modifies the equilibrium between actin construction and destruction, facilitating spine expansion [62].”

• cites [62] Fraser, 2025, Milestone Review: Unlocking the Proteomics of Glycine Receptor Complexes, J. Neurochem. sourceCould not verify

  The Introduction mentions actin binding and cytoskeletal dynamics, but does not describe a coordinated shift between actin assembly and breakdown or link it to spine expansion. Searches for actin polymerization and depolymerization, and for dendritic spine enlargement, found no passage making that claim. (LLM, conf=0.72)

  Experimental — accuracy not yet measured

Without caspase activity, microglia fail to recognize and eliminate inactive synapses, which is critical for circuit refinement.

“Without caspase activity, microglia fail to recognize and eliminate inactive synapses, which is critical for circuit refinement [73,81].”

• cites [73] Yu, 2025, Activity-dependent synapse elimination requires caspase-3 activation, Elife sourceNot checked — no full text of the source
• cites [81] Liu, 2024, The Role of the Complement System in Synaptic Pruning after Stroke, Aging Dis. sourcePartly supported

  The 'Overview of synaptic pruning and glia-mediated synaptic pruning' (page not provided) says microglia engulf infrequently used connections to refine synaptic circuits. The copy does not say that this process requires caspase activity or that microglia fail to recognize and eliminate synapses without it (searched: caspase, inactive synapses). (LLM, conf=0.88)

  Experimental — accuracy not yet measured

Complement proteins, particularly C1q and C3, are produced by microglia or astrocytes and localize to apoptotic, immature, or weak developing synapses.

“Complement proteins, particularly C1q (the initiating protein) and C3, are produced by microglia or astrocytes and localize to apoptotic, immature, or weak developing synapses.”

• cites [81] Liu, 2024, The Role of the Complement System in Synaptic Pruning after Stroke, Aging Dis. sourcePartly supported

  The ‘role of C1q in synaptic pruning’ section identifies C1q as the classical complement initiator and says it is derived in part from microglia. The neurodegeneration section says C3 labels weak synapses in the developing visual system. The copy does not establish astrocytes as a source of these proteins or say that the proteins localize to apoptotic or immature synapses; its discussion of apoptotic cells is not a statement about synapses. (LLM, conf=0.86)

  Experimental — accuracy not yet measured
• cites [82] Cornell, 2022, Microglia regulation of synaptic plasticity and learning and memory, Neural Regen. Res. sourceSupported
• cites [83] Imai, T. (2025). Activity-dependent synaptic competition and dendrite pruning in developing mitral cells. Front. Neural Circuits, 19. sourceCould not verify

  The ‘Role of glia in synapse elimination’ section discusses glial engulfment of synapses, but does not say that microglia or astrocytes produce C1q or C3, or that those proteins localize to apoptotic, immature, or weak synapses. Searches for C1q, C3, and complement localization found only complement-related reference titles, not a passage addressing the claim. (LLM, conf=0.76)

  Experimental — accuracy not yet measured

The formation, maturation, and selective elimination of synapses are dynamic processes essential for the precise wiring of neural circuits during development and for maintaining brain function throughout life.

“The formation, maturation, and selective elimination of synapses are dynamic processes essential for the precise wiring of neural circuits during development and for maintaining brain function throughout life [1,3].”

• cites [1] Sudhof, 2021, The cell biology of synapse formation, J. Cell Biol. sourceSupported
• cites [3] Sudhof, 2018, Towards an Understanding of Synapse Formation, Neuron sourceSupported

Synaptogenesis is initiated when axonal growth cones, extending from developing neurons, encounter their target cells and establish adhesive interactions.

“Synaptogenesis, the formation of new synapses, is initiated when axonal growth cones, extending from developing neurons, encounter their target cells and establish adhesive interactions [49,73,74].”

• cites [49] Qi, C., Luo, L.D., Feng, I., and Ma, S. (2022). Molecular mechanisms of synaptogenesis. Front. Synaptic Neurosci., 14. sourcePartly supported

  The Introduction says synapse formation requires pre- and post-synaptic compartments to be aligned and connected by cell adhesion molecules. But the Concluding remarks and perspectives section says it remains unclear whether assembly starts with contact between those sites or with cytoskeletal organization. The paper therefore does not support the definite sequence in which growth cones encounter target cells and thereby initiate synaptogenesis. (LLM, conf=0.87)

  Experimental — accuracy not yet measured
• cites [73] Yu, 2025, Activity-dependent synapse elimination requires caspase-3 activation, Elife sourceNot checked — no full text of the source
• cites [74] Frankel, 2025, Principles of synaptogenesis: Insights from Caenorhabditiselegans, Curr. Opin. Neurobiol. sourceNot checked — no full text of the source

Tagged synapses are recognized and engulfed by microglial complement receptor 3 (CR3).

“These tagged synapses are then recognized and engulfed by microglial complement receptor 3 (CR3).”

• cites [81] Liu, 2024, The Role of the Complement System in Synaptic Pruning after Stroke, Aging Dis. sourceSupported
• cites [82] Cornell, 2022, Microglia regulation of synaptic plasticity and learning and memory, Neural Regen. Res. sourceSupported
• cites [83] Imai, T. (2025). Activity-dependent synaptic competition and dendrite pruning in developing mitral cells. Front. Neural Circuits, 19. sourcePartly supported

  The ‘Role of glia in synapse elimination’ section reports that microglia engulf synapses in some circuits and discusses a proposed role for ‘eat-me’ signals on loser synapses. It does not identify complement receptor 3 (CR3) as the receptor that recognizes tagged synapses, and it cautions that microglial involvement in synapse elimination may have been overstated. No page number was supplied for the passage. (LLM, conf=0.87)

  Experimental — accuracy not yet measured

While many structural components are pre-assembled, contact-mediated cell-cell communications and guidance cues (e.g., netrins, FLRTs) are essential for proper wiring and synaptic targeting.

“While many structural components are pre-assembled, contact-mediated cell–cell communications and guidance cues (e.g., netrins, FLRTs) are essential for proper wiring and synaptic targeting [80].”

• cites [80] Yamagishi, S., Bando, Y., and Sato, K. (2020). Involvement of Netrins and Their Receptors in Neuronal Migration in the Cerebral Cortex. Front. Cell Dev. Biol., 8. sourcePartly supported

  The Cortical Neuron Migration and Unc5/FLRT sections describe netrins and FLRTs as guidance and recognition molecules involved in neuronal migration, axon guidance, and synapse formation. The paper does not establish that structural components are pre-assembled or that these cues are essential for synaptic targeting; Future Directions says how they coordinate proper wiring remains poorly understood. No page numbers are available in our copy. (LLM, conf=0.85)

  Experimental — accuracy not yet measured

Microglia play a central role in activity-dependent synapse elimination by engulfing weak or unnecessary synapses.

“Microglia, the brain’s resident immune cells, play a central role in activity-dependent synapse elimination by engulfing weak or unnecessary synapses [70,80].”

• cites [70] Camus, 2025, Synaptic pruning following NMDAR-dependent LTD preferentially affects isolated synapses, iScience sourcePartly supported

  The Introduction describes activity-dependent synapse elimination, and the Discussion reports that synaptic activity and the activity of neighboring synapses influence which spines are lost. Neither those passages nor a search of our copy for microglia describes microglial engulfment or establishes that microglia play a central role in this process. (LLM, conf=0.85)

  Experimental — accuracy not yet measured
• cites [80] Yamagishi, S., Bando, Y., and Sato, K. (2020). Involvement of Netrins and Their Receptors in Neuronal Migration in the Cerebral Cortex. Front. Cell Dev. Biol., 8. sourceCould not verify

  The Future Directions section mentions synapse formation and plasticity, while the sections on cortical neuronal migration discuss netrins and their receptors. Searches for microglia, synaptic pruning, and engulfment found no passage in our copy addressing microglial elimination of weak or unnecessary synapses; page numbers were unavailable. (LLM, conf=0.75)

  Experimental — accuracy not yet measured

C1q presynaptic tagging correlates with apoptotic markers, guiding pruning decisions.

“C1q presynaptic tagging correlates with apoptotic markers, guiding pruning decisions [81,82,83].”

• cites [81] Liu, 2024, The Role of the Complement System in Synaptic Pruning after Stroke, Aging Dis. sourcePartly supported

  The sections on C1q and neurodegeneration describe C1q marking synapses before they are engulfed or lost, supporting its role in pruning (page not specified in our copy). They do not identify the tagging as presynaptic or report a correlation between that tagging and apoptotic markers. The separate statement that C1q helps eliminate apoptotic cells does not establish that correlation. (LLM, conf=0.86)

  Experimental — accuracy not yet measured
• cites [82] Cornell, 2022, Microglia regulation of synaptic plasticity and learning and memory, Neural Regen. Res. sourceSupported
• cites [83] Imai, T. (2025). Activity-dependent synaptic competition and dendrite pruning in developing mitral cells. Front. Neural Circuits, 19. sourceCould not verify

  The ‘Role of glia in synapse elimination’ section discusses proposed eat-me signals and microglial engulfment, but does not describe C1q tagging or a correlation with apoptotic markers. Searches for C1q, complement tagging, and apoptotic markers found no passage establishing the claimed relationship. (LLM, conf=0.73)

  Experimental — accuracy not yet measured

Newly synthesized proteins are thought to maintain LTP and LTD primarily through the regulation of ionotropic glutamate receptor trafficking or the stabilization of structural changes that maintain receptor density at the synapse.

“Newly synthesized proteins are thought to maintain LTP and LTD primarily through the regulation of ionotropic glutamate receptor trafficking or the stabilization of structural changes that maintain receptor density at the synapse [17].”

• cites [17] Mochida, 2004, Physical and functional interaction of the active zone proteins, CAST, RIM1, and Bassoon, in neurotransmitter release, J. Cell Biol. sourceCould not verify

  The Introduction and Discussion address presynaptic active-zone proteins and neurotransmitter release, not how newly synthesized proteins maintain LTP or LTD. Searches for glutamate-receptor trafficking and structural changes maintaining synaptic receptor density found no passage addressing the claim; page numbers are unavailable in our copy. (LLM, conf=0.76)

  Experimental — accuracy not yet measured

Activation of group 1 mGluRs induces LTD that requires rapid protein synthesis within minutes.

“For instance, activation of group 1 mGluRs induces LTD that requires rapid protein synthesis within minutes.”

• cites [17] Mochida, 2004, Physical and functional interaction of the active zone proteins, CAST, RIM1, and Bassoon, in neurotransmitter release, J. Cell Biol. sourceCould not verify

  The Results section reports that disrupting CAST–RIM1 or CAST–Bassoon binding impairs synaptic transmission in SCG neurons; it does not address group 1 mGluR-induced LTD. Searches for mGluRs, long-term depression, and rapid protein synthesis found no passage supporting the attributed claim. Page numbers were not available in our copy. (LLM, conf=0.76)

  Experimental — accuracy not yet measured

The classical complement cascade acts as a primary tagging mechanism for microglial pruning.

“The “eat me” signals include the classical complement cascade, that acts as a primary “tagging” mechanism for microglial pruning [46,81].”

• cites [46] Nandi, 2025, Synaptic Pruning by Microglia: Lessons from Genetic Studies in Mice, Dev. Neurosci.Not matched

  Couldn’t be matched to a paper in Crossref, so it can’t be checked.

• cites [81] Liu, 2024, The Role of the Complement System in Synaptic Pruning after Stroke, Aging Dis. sourceSupported

SynCAM1 promotes the recruitment of GluA1-containing AMPA receptors.

“SynCAM1, for instance, promotes the recruitment of GluA1-containing AMPA receptors [27].”

• cites [27] Jaczynska, 2025, A lever hypothesis for Synaptotagmin-1 action in neurotransmitter release, Proc. Natl. Acad. Sci. USA sourceCould not verify

  The Results passages discuss Synaptotagmin-1, Ca2+, and SNARE-complex interactions, not SynCAM1 or AMPA-receptor recruitment. Searches for “SynCAM1 GluA1-containing AMPA receptors” and “recruitment of AMPA receptors by SynCAM1” found no passage addressing the claim; page numbers were not available in our copy. (LLM, conf=0.77)

  Experimental — accuracy not yet measured

Microglia-mediated synapse elimination strictly requires the activation of caspase-3 within the neuronal postsynaptic compartment.

“It has been discovered that this process strictly requires the activation of caspase-3 within the neuronal postsynaptic compartment.”

• cites [73] Yu, 2025, Activity-dependent synapse elimination requires caspase-3 activation, Elife sourceNot checked — no full text of the source
• cites [81] Liu, 2024, The Role of the Complement System in Synaptic Pruning after Stroke, Aging Dis. sourceCould not verify

  The sections on glia-mediated synaptic pruning after stroke and the Conclusion describe microglial synapse elimination, but do not address whether it requires caspase-3 activation in the neuronal postsynaptic compartment. Searches for caspase-3 activation and the postsynaptic requirement found no passage establishing that mechanism. (LLM, conf=0.72)

  Experimental — accuracy not yet measured

In invertebrate models, the Liprin-alpha (syd-2) scaffold is crucial for coordinating cargo trafficking and the structural organization of dendritic spines.

“In invertebrate models, the Liprin-alpha (syd-2) scaffold is crucial for coordinating cargo trafficking and the structural organization of dendritic spines [77].”

• cites [77] Oliver, D.B., Ramachandran, S., Biswas, K., Benard, C.Y., Doitsidou, M., McKillop, H., Genao, N., Lemons, M.L., and Francis, M.M. (2025). Genome-wide analysis reveals pathways important for the development and maturation of excitatory synaptic connections to GABAergic neurons. bioRxiv. sourcePartly supported

  The section “Mutation of syd-2/Liprin α disrupts dendritic spine formation” reports that syd-2 mutants have fewer dendritic spines and says SYD-2 was previously implicated in cargo trafficking. It does not establish that SYD-2 coordinates cargo trafficking with dendritic-spine organization; the authors describe how SYD-2 affects spines as unresolved. (LLM, conf=0.84)

  Experimental — accuracy not yet measured

Neurexins and neuroligins guide synapse formation by specifying postsynaptic receptor composition and release probability through an extensive code of alternative splicing.

“These molecules guide synapse formation by specifying postsynaptic receptor composition and release probability through an extensive code of alternative splicing [12].”

• cites [12] Ackermann, 2015, Presynaptic active zones in invertebrates and vertebrates, EMBO Rep. sourcePartly supported

  The Drosophila active zones section says neurexins and neuroligins facilitate synapse assembly, and the Active zone and release probability section links their signaling to presynaptic size and reliability. Neither passage says they specify postsynaptic receptor composition or do so through an alternative-splicing code; the review describes the mechanism linking the complex to presynaptic changes as still unknown. Page numbers are unavailable in our copy. (LLM, conf=0.88)

  Experimental — accuracy not yet measured

Initial contact triggers a cascade of intracellular signaling events that lead to the recruitment and organization of presynaptic and postsynaptic components.

“This initial contact triggers a cascade of intracellular signaling events that lead to the recruitment and organization of presynaptic and postsynaptic components.”

• cites [49] Qi, C., Luo, L.D., Feng, I., and Ma, S. (2022). Molecular mechanisms of synaptogenesis. Front. Synaptic Neurosci., 14. sourcePartly supported

  The Introduction (page unavailable) describes assembly of pre- and postsynaptic molecules, and the assembly section reports that PSD95 accumulates after new contacts form. But the Concluding remarks (page unavailable) say it remains unclear whether synapse formation starts with contact or with prior cytoskeletal organization. The paper therefore does not establish that initial contact triggers the claimed intracellular signaling cascade. (LLM, conf=0.86)

  Experimental — accuracy not yet measured
• cites [73] Yu, 2025, Activity-dependent synapse elimination requires caspase-3 activation, Elife sourceNot checked — no full text of the source
• cites [74] Frankel, 2025, Principles of synaptogenesis: Insights from Caenorhabditiselegans, Curr. Opin. Neurobiol. sourceNot checked — no full text of the source

The specificity by which new proteins participate in either LTP or LTD may be determined by specific RNA-binding proteins and an activity-dependent capture mechanism.

“The specificity by which new proteins participate in either LTP or LTD may be determined by specific RNA-binding proteins and an “activity-dependent capture” mechanism.”

• cites [17] Mochida, 2004, Physical and functional interaction of the active zone proteins, CAST, RIM1, and Bassoon, in neurotransmitter release, J. Cell Biol. sourceCould not verify

  The Introduction describes presynaptic active zones and neurotransmitter release, while the Results examine interactions among CAST, RIM1, and Bassoon; no page numbers are available in our copy. Searches for RNA-binding proteins, activity-dependent capture, and newly synthesized proteins in LTP or LTD found no passage addressing the claimed mechanism. (LLM, conf=0.76)

  Experimental — accuracy not yet measured
• cites [63] Sanhueza, 2013, The CaMKII/NMDAR complex as a molecular memory, Mol. Brain sourcePartly supported

  The section on structural growth in late LTP (page not provided) describes activity-dependent tagging of a synapse that captures newly synthesized proteins for late LTP. It does not attribute specificity between LTP and LTD to RNA-binding proteins, or discuss that proposed distinction. (LLM, conf=0.88)

  Experimental — accuracy not yet measured

Neurexins and neuroligins form heterophilic complexes that act as instructive signaling devices rather than mere structural anchors.

“Neurexins and neuroligins form heterophilic complexes that act as instructive signaling devices rather than mere structural anchors [12].”

• cites [12] Ackermann, 2015, Presynaptic active zones in invertebrates and vertebrates, EMBO Rep. sourceSupported

Synaptic diversity is evident in subcellular specificity, where specific presynaptic terminals precisely target particular postsynaptic subcellular domains.

“Synaptic diversity is also evident in subcellular specificity, where specific presynaptic terminals precisely target particular postsynaptic subcellular domains [86].”

• cites [86] Wang, M., Fan, J., and Shao, Z. (2024). Cellular and Molecular Mechanisms Underlying Synaptic Subcellular Specificity. Brain Sci., 14. sourceSupported

Alternative splicing and post-translational modifications significantly amplify the molecular diversity of synapses, allowing a single gene to produce multiple protein isoforms with distinct functions and regulatory properties.

“Beyond the sheer number of genes encoding synaptic proteins, alternative splicing and post-translational modifications (PTMs) significantly amplify the molecular diversity of synapses, allowing a single gene to produce multiple protein isoforms (proteoforms) with distinct functions and regulatory properties [87].”

• cites [87] Crowl, 2025, Systematic analysis of the effects of splicing on the diversity of post-translational modifications in protein isoforms using PTM-POSE, Cell Syst. sourcePartly supported

  The Introduction says alternative splicing and PTMs generate proteoforms with distinct functions, and gives a neuroligin-1 example affecting synapse formation. The Results describe isoform-specific PTM availability and potential regulatory interactions. The paper does not establish that these mechanisms significantly amplify the molecular diversity of synapses as a whole. (LLM, conf=0.85)

  Experimental — accuracy not yet measured

The CD200/CD200R pathway helps protect strong synapses from engulfment.

“Similarly, the CD200/CD200R pathway (CD200 on neurons, CD200R on microglia) helps protect strong synapses from engulfment [13].”

• cites [13] Kim, 2025, Synaptic Vesicle Recycling at the Developing Presynapse, J. Neurochem. sourceCould not verify

  The SV Endocytosis section discusses vesicle retrieval and the removal of presynapses during C. elegans rewiring, not CD200/CD200R-mediated protection of strong synapses. Searches for CD200/CD200R, microglial engulfment, and protective signals found no passage addressing the claim in our copy. Page numbers were not available. (LLM, conf=0.75)

  Experimental — accuracy not yet measured

A smaller but notable percentage of PTM sites exhibit altered regulatory sequences surrounding the modification site, suggesting changes in binding interactions.

“Recent computational analyses have shown that a significant percentage of PTM sites are excluded from at least one protein isoform due to alternative splicing, and a smaller but notable percentage exhibit altered regulatory sequences surrounding the modification site, suggesting changes in binding interactions [87].”

• cites [87] Crowl, 2025, Systematic analysis of the effects of splicing on the diversity of post-translational modifications in protein isoforms using PTM-POSE, Cell Syst. sourceSupported

The synaptome is built from the hierarchical expression and assembly of proteins into complexes and supercomplexes.

“The “synaptome,” which describes the diversity of synapses and their anatomical distribution, is built from the hierarchical expression and assembly of proteins into complexes and supercomplexes [4,10].”

• cites [4] Schuman, 2025, Understanding the molecular diversity of synapses, Nat. Rev. Neurosci. sourceNot checked — no full text of the source
• cites [10] Grant, 2019, Synapse diversity and synaptome architecture in human genetic disorders, Hum. Mol. Genet. sourceSupported

Neurexins are expressed in thousands of isoforms due to alternative promoter usage and alternative splicing.

“For example, neurexins, key presynaptic CAMs, are expressed in thousands of isoforms due to alternative promoter usage and alternative splicing, with different isoforms exhibiting dramatically varied functions depending on the neuron type [1].”

• cites [1] Sudhof, 2021, The cell biology of synapse formation, J. Cell Biol. sourceSupported

Astrocytes contribute significantly to synapse formation and function.

“Astrocytes, another major glial cell type, also contribute significantly to synapse formation and function.”

• cites [1] Sudhof, 2021, The cell biology of synapse formation, J. Cell Biol. sourcePartly supported

  The “Glia in synapse formation” section says extensive evidence suggests astrocytes play a major role in synapse formation. It says they likely help shape tripartite synapses, but does not establish a significant contribution to synaptic function; it notes that few functional analyses have been performed. (LLM, conf=0.82)

  Experimental — accuracy not yet measured

Abolishing evoked release does not impede ultrastructurally normal synapse formation.

“The precise role of neurotransmitter signals in synapse establishment, given that abolishing evoked release does not impede ultrastructurally normal synapse formation, presents a significant conundrum [1].”

• cites [1] Sudhof, 2021, The cell biology of synapse formation, J. Cell Biol. sourceSupported

Dlg2 and Dlg3 have diversified to support complex cognitive functions across vertebrate evolution.

“While some scaffold protein families found in invertebrates are absent in vertebrates, the latter generally possess more isoforms from families such as Dlg, where Dlg2 and Dlg3 have diversified to support complex cognitive functions across vertebrate evolution [7,8].”

• cites [7] Nithianantharajah, 2013, Synaptic scaffold evolution generated components of vertebrate cognitive complexity, Nat. Neurosci. sourceSupported
• cites [8] Orvis, 2022, The evolution of synaptic and cognitive capacity: Insights from the nervous system transcriptome of Aplysia, Proc. Natl. Acad. Sci. USA sourcePartly supported

  The Results (Postsynaptic Scaffold Proteins; page unavailable) report more DLG-family gene isoforms in humans than in the mollusks examined. The Discussion (Complexity of the Synaptic Proteome during Evolution; page unavailable) says DLG-family members may contribute to different cognitive processes, but explicitly says there is not yet evidence that an individual DLG isoform has a unique role in learning-related plasticity. The paper does not establish the claimed cognitive purpose for Dlg2 and Dlg3 specifically. (LLM, conf=0.87)

  Experimental — accuracy not yet measured

Different neurexin isoforms exhibit dramatically varied functions depending on the neuron type.

“For example, neurexins, key presynaptic CAMs, are expressed in thousands of isoforms due to alternative promoter usage and alternative splicing, with different isoforms exhibiting dramatically varied functions depending on the neuron type [1].”

• cites [1] Sudhof, 2021, The cell biology of synapse formation, J. Cell Biol. sourceSupported

CD47 expressed by neurons binds to its receptor SIRPα on microglia, inhibiting phagocytosis of active synapses.

“CD47, expressed by neurons, binds to its receptor SIRPα on microglia, inhibiting phagocytosis of active synapses [82].”

• cites [82] Cornell, 2022, Microglia regulation of synaptic plasticity and learning and memory, Neural Regen. Res. sourceSupported

A complete and unified understanding of how synaptic vesicle recycling is controlled as a whole remains elusive.

“While various endocytic pathways have been identified, a complete and unified understanding of how synaptic vesicle recycling is controlled as a whole remains elusive [45].”

• cites [45] Khan, 2025, AMPA Receptors in Synaptic Plasticity, Memory Function, and Brain Diseases, Cell. Mol. Neurobiol. sourceCould not verify

  The section on proteins implicated in AMPA receptor trafficking during LTP and LTD describes postsynaptic receptor movement and mentions a synaptic vesicle protein, but does not address whether control of synaptic vesicle recycling is understood as a whole. A search for synaptic vesicle recycling and endocytic pathways found no passage making the attributed point. (LLM, conf=0.74)

  Experimental — accuracy not yet measured

The final output of a neuron is determined not only by the type and intensity of synaptic inputs but also by their physical location on the neuron.

“The final output of a neuron is determined not only by the type and intensity of synaptic inputs but also by their physical location on the neuron [86].”

• cites [86] Wang, M., Fan, J., and Shao, Z. (2024). Cellular and Molecular Mechanisms Underlying Synaptic Subcellular Specificity. Brain Sci., 14. sourceSupported

Synaptic subcellular specificity can be regulated at various stages of neurodevelopment, including neurogenesis, neuronal migration, axon guidance, and synaptic targeting.

“This specificity can be regulated at various stages of neurodevelopment, including neurogenesis, neuronal migration, axon guidance, and synaptic targeting.”

• cites [86] Wang, M., Fan, J., and Shao, Z. (2024). Cellular and Molecular Mechanisms Underlying Synaptic Subcellular Specificity. Brain Sci., 14. sourceSupported

Scaffold proteins mediate the precise organization of presynaptic release sites and postsynaptic receptors.

“Evolutionary analyses suggest that the increased cognitive power in sophisticated vertebrates is linked to an expansion of synaptic protein diversity, particularly scaffold proteins, which mediate the precise organization of presynaptic release sites and postsynaptic receptors.”

• cites [7] Nithianantharajah, 2013, Synaptic scaffold evolution generated components of vertebrate cognitive complexity, Nat. Neurosci. sourcePartly supported

  The Discussion (page unavailable) describes Dlg scaffold proteins as part of synaptic signalling complexes and notes their association with NMDA receptors, supporting the postsynaptic-receptor portion. The paper does not say that these proteins organize presynaptic release sites, so that portion is unsupported. (LLM, conf=0.84)

  Experimental — accuracy not yet measured
• cites [8] Orvis, 2022, The evolution of synaptic and cognitive capacity: Insights from the nervous system transcriptome of Aplysia, Proc. Natl. Acad. Sci. USA sourceSupported

Post-translational modifications such as phosphorylation, palmitoylation, and glycosylation further diversify the proteome by altering protein function, stability, localization, and interaction partners.

“Post-translational modifications (PTMs), such as phosphorylation, palmitoylation, and glycosylation, further diversify the proteome by altering protein function, stability, localization, and interaction partners [5,87].”

• cites [5] Picanol, 2025, Synaptic proteome diversity is shaped by the levels of glutamate receptors and their regulatory proteins, Nat. Commun. sourceCould not verify

  The Discussion (page unavailable) attributes synaptic proteome diversity chiefly to differences in glutamate-receptor-related proteins and neuron-specific gene expression, not to post-translational modifications. Searches for PTMs, phosphorylation, palmitoylation, and glycosylation found phosphorylation and palmitoylation only in a cited reference’s title; no passage states the claimed effects on proteome diversity, stability, localization, or interaction partners. (LLM, conf=0.76)

  Experimental — accuracy not yet measured
• cites [87] Crowl, 2025, Systematic analysis of the effects of splicing on the diversity of post-translational modifications in protein isoforms using PTM-POSE, Cell Syst. sourcePartly supported

  The Introduction describes PTMs as a source of functionally distinct proteoforms, and the Results section on PTM inclusion links PTM sites to protein activity, intracellular localization, and molecular associations. The paper also discusses phosphorylation, palmitoylation, and glycosylation as PTM types. The cited passages do not support the specific claim that PTMs alter protein stability. (LLM, conf=0.86)

  Experimental — accuracy not yet measured

A significant percentage of PTM sites are excluded from at least one protein isoform due to alternative splicing.

“Recent computational analyses have shown that a significant percentage of PTM sites are excluded from at least one protein isoform due to alternative splicing, and a smaller but notable percentage exhibit altered regulatory sequences surrounding the modification site, suggesting changes in binding interactions [87].”

• cites [87] Crowl, 2025, Systematic analysis of the effects of splicing on the diversity of post-translational modifications in protein isoforms using PTM-POSE, Cell Syst. sourceSupported

The totality of specific molecules and chemical signals involved in guiding initial synapse formation and target specificity is not yet completely understood.

“The totality of specific molecules and chemical signals involved in guiding initial synapse formation and target specificity is not yet completely understood [46,80,81].”

• cites [46] Nandi, 2025, Synaptic Pruning by Microglia: Lessons from Genetic Studies in Mice, Dev. Neurosci.Not matched

  Couldn’t be matched to a paper in Crossref, so it can’t be checked.

• cites [80] Yamagishi, S., Bando, Y., and Sato, K. (2020). Involvement of Netrins and Their Receptors in Neuronal Migration in the Cerebral Cortex. Front. Cell Dev. Biol., 8. sourcePartly supported

  The Future Directions section says that synapse formation is among the functions of netrins and that little is known about how these functions are coordinated for proper neuronal wiring. It does not specifically address the full set of molecules and signals governing initial synapse formation or target specificity; its stated uncertainty concerns coordination after neuronal migration. No page number is available in our copy. (LLM, conf=0.82)

  Experimental — accuracy not yet measured
• cites [81] Liu, 2024, The Role of the Complement System in Synaptic Pruning after Stroke, Aging Dis. sourceCould not verify

  The Overview of synaptic pruning and glia-mediated synaptic pruning (page unavailable) describes the removal of redundant connections, not how synapses initially form or select targets. Searches for initial synapse formation, target specificity, and uncertainty about their guiding signals found no passage addressing the claim; the Conclusion and prospect instead identifies gaps in research on pruning after stroke. (LLM, conf=0.76)

  Experimental — accuracy not yet measured

Astrocytes often ensheath synaptic contacts, forming tripartite synapses that influence synaptic properties.

“They often ensheath synaptic contacts, forming “tripartite synapses” that influence synaptic properties [1].”

• cites [1] Sudhof, 2021, The cell biology of synapse formation, J. Cell Biol. sourcePartly supported

  In “Glia in synapse formation” (page not provided), the paper says astrocytic extensions often surround synaptic contacts, creating tripartite synapses. It says astrocytes *likely* contribute to shaping those synapses; the claim presents their influence as established rather than qualified. (LLM, conf=0.82)

  Experimental — accuracy not yet measured

Vertebrates generally possess more isoforms from scaffold protein families such as Dlg than invertebrates.

“While some scaffold protein families found in invertebrates are absent in vertebrates, the latter generally possess more isoforms from families such as Dlg, where Dlg2 and Dlg3 have diversified to support complex cognitive functions across vertebrate evolution [7,8].”

• cites [7] Nithianantharajah, 2013, Synaptic scaffold evolution generated components of vertebrate cognitive complexity, Nat. Neurosci. sourceSupported
• cites [8] Orvis, 2022, The evolution of synaptic and cognitive capacity: Insights from the nervous system transcriptome of Aplysia, Proc. Natl. Acad. Sci. USA sourceSupported

Certain regions may show a compensatory increase in SV2A binding during early disease stages.

“While SV2A levels eventually decrease in correlation with tau accumulation and glymphatic impairment in late-stage Alzheimer’s, certain regions may show a compensatory increase in SV2A binding during early disease stages [93,94,95].”

• cites [93] Lemoine, 2025, Biomarkers, Alzheimers Dement. sourceSupported
• cites [94] He, K., Wang, J., Wu, J., Chen, X., Chen, H., Li, J., Guo, Q., Huang, Y.H., Guan, Y., and Zhao, J. (2025). Impaired glymphatic function is associated with synaptic loss in cognitive impairment. Eur. J. Nucl. Med. Mol. Imaging. sourceNot checked — no full text of the source
• cites [95] Le, 2025, Biomarkers, Alzheimers Dement. sourceCould not verify

  The Results report decreased SV2A-tracer binding in the dentate gyrus, CA1, and entorhinal cortex of AD brains compared with controls. The Methods and Conclusion do not distinguish early from later disease stages or describe a compensatory increase; searches for those terms found no supporting passage. The reported decreases do not rule out a possible increase at an unexamined early stage. (LLM, conf=0.76)

  Experimental — accuracy not yet measured

Alternative splicing and post-translational modifications are known to generate immense synaptic protein diversity.

“Although alternative splicing and post-translational modifications are known to generate immense synaptic protein diversity, a detailed understanding of how these modifications precisely rewire protein interaction and regulatory networks in specific biological contexts is still emerging [87].”

• cites [87] Crowl, 2025, Systematic analysis of the effects of splicing on the diversity of post-translational modifications in protein isoforms using PTM-POSE, Cell Syst. sourcePartly supported

  The Introduction (page unavailable) says alternative splicing and PTMs generate distinct protein forms and gives a neuroligin-1 example affecting synapse formation. It does not establish that these mechanisms generate immense diversity specifically among synaptic proteins; its broader analysis concerns the human proteome. (LLM, conf=0.84)

  Experimental — accuracy not yet measured

Parameter estimation and sensitivity analysis in spatial models (reaction-diffusion networks) remain significantly more difficult than in single-compartment models.

“However, parameter estimation and sensitivity analysis in spatial models (reaction-diffusion networks) remain significantly more difficult than in single-compartment models [71].”

• cites [71] Blackwell, 2013, Molecular mechanisms underlying neuronal synaptic plasticity: Systems biology meets computational neuroscience in the wilds of synaptic plasticity, Wiley Interdiscip. Rev. Syst. Biol. Med. sourceSupported

In vivo conversion of astrocytes into neurons via viral reprogramming has shown potential in reversing neuroinflammation and cognitive deficits in Alzheimer's models.

“Computational modeling will also be essential for integrating complex molecular data into predictive frameworks, ultimately informing strategies such as the in vivo conversion of astrocytes into neurons via viral reprogramming, which has shown potential in reversing neuroinflammation and cognitive deficits in Alzheimer’s models [90,91].”

• cites [90] Tahmasian, 2025, Drug Development, Alzheimers Dement. sourceSupported
• cites [91] Weng, 2025, Biomarkers, Alzheimers Dement. sourceCould not verify

  The Methods and Results describe spatial profiling of postmortem human brain tissue and report inflammatory and astrocytic markers in AD with cerebral amyloid angiopathy. A search for viral reprogramming and astrocyte-to-neuron conversion found no passage addressing an in vivo intervention or its effects on neuroinflammation or cognition in Alzheimer’s models. Page numbers are not available in our copy. (LLM, conf=0.76)

  Experimental — accuracy not yet measured

SV2A PET imaging likely reflects changes in actual synapse density rather than changes in protein levels within remaining synapses.

“Additionally, SV2A PET imaging likely reflects changes in actual synapse density rather than changes in protein levels within remaining synapses [92].”

• cites [92] Young, 2025, Biomarkers, Alzheimers Dement. sourceSupported

Spatial transcriptomics (Visium) has shown that in vivo conversion of astrocytes into neurons can reverse AD-associated signaling patterns, such as the increase in neuregulin signaling between neurons.

“These models inform strategies like the in vivo conversion of astrocytes into neurons; spatial transcriptomics (Visium) has shown that this conversion can reverse AD-associated signaling patterns, such as the increase in neuregulin signaling between neurons [90,96].”

• cites [90] Tahmasian, 2025, Drug Development, Alzheimers Dement. sourcePartly supported

  The Methods say the study used Visium to examine astrocyte-to-neuron conversion in AD rats, and the Results report that conversion reversed many AD-associated signaling patterns. The Results also identify increased neuron-to-neuron neuregulin signaling in AD, but do not say that conversion reversed that particular increase. (LLM, conf=0.84)

  Experimental — accuracy not yet measured
• cites [96] Marin-Castaneda, L.A., Pacheco Aispuro, G., Gonzalez-Garibay, G., Martinez Zamora, C.A., Romo-Parra, H., Rubio-Osornio, M., and Rubio, C. (2024). Interplay of epilepsy and long-term potentiation: Implications for memory. Front. Neurosci., 18. sourceCould not verify

  The Neuroinflammatory pathway section discusses astrocyte signaling in long-term potentiation and epilepsy, but not astrocyte-to-neuron conversion in Alzheimer’s disease. Searches for Visium, neuregulin, and conversion or reprogramming found no passage addressing the claimed reversal of signaling patterns. (LLM, conf=0.78)

  Experimental — accuracy not yet measured

SV2A levels eventually decrease in correlation with tau accumulation and glymphatic impairment in late-stage Alzheimer's.

“While SV2A levels eventually decrease in correlation with tau accumulation and glymphatic impairment in late-stage Alzheimer’s, certain regions may show a compensatory increase in SV2A binding during early disease stages [93,94,95].”

• cites [93] Lemoine, 2025, Biomarkers, Alzheimers Dement. sourcePartly supported

  The Results (page not specified) report lower SV2A-tracer binding in late-stage than early-stage Alzheimer’s groups in some tissue preparations, and the Conclusion suggests a possible compensatory increase early in disease. The paper does not assess a correlation with tau accumulation or glymphatic impairment, and binding measurements do not directly establish SV2A levels. (LLM, conf=0.88)

  Experimental — accuracy not yet measured
• cites [94] He, K., Wang, J., Wu, J., Chen, X., Chen, H., Li, J., Guo, Q., Huang, Y.H., Guan, Y., and Zhao, J. (2025). Impaired glymphatic function is associated with synaptic loss in cognitive impairment. Eur. J. Nucl. Med. Mol. Imaging. sourceNot checked — no full text of the source
• cites [95] Le, 2025, Biomarkers, Alzheimers Dement. sourcePartly supported

  The Conclusion reports decreased SV2A and increased tau accumulation in AD brains, supporting that part of the claim. The Methods and Results describe postmortem AD-versus-control tissue, not a late-stage trajectory, and do not assess glymphatic impairment. The reported correlation between SV2A and tau tracer binding within AD subregions is positive, so it should not be described as a demonstrated correlation between falling SV2A and rising tau. (LLM, conf=0.88)

  Experimental — accuracy not yet measured

A detailed understanding of how alternative splicing and PTMs precisely rewire protein interaction and regulatory networks in specific biological contexts is still emerging.

“Although alternative splicing and post-translational modifications are known to generate immense synaptic protein diversity, a detailed understanding of how these modifications precisely rewire protein interaction and regulatory networks in specific biological contexts is still emerging [87].”

• cites [87] Crowl, 2025, Systematic analysis of the effects of splicing on the diversity of post-translational modifications in protein isoforms using PTM-POSE, Cell Syst. sourceSupported

CaMKII is central to LTP induction.

“While CaMKII is central to LTP induction, the molecular processes by which the CaMKII/NMDAR complex produces the structural growth of the synapse that underlies late LTP [63].”

• cites [63] Sanhueza, 2013, The CaMKII/NMDAR complex as a molecular memory, Mol. Brain sourceSupported

The synapse proteome is complex, comprising over a thousand conserved proteins, particularly within excitatory synapses.

“In the early 2000s, major advances occurred with the discovery that the synapse proteome is complex, comprising over a thousand conserved proteins, particularly within excitatory synapses [9].”

• cites [9] Kaizuka, 2018, Postsynaptic density proteins and their involvement in neurodevelopmental disorders, J. Biochem. sourceNot checked — no full text of the source

The direct interaction between presynaptic calcium channels and postsynaptic laminin β2 indicates that the postsynaptic neuron actively contributes to the structural organization of the presynaptic terminal.

“This indicates that the postsynaptic neuron actively contributes to the structural organization of the presynaptic terminal, highlighting the interdependent nature of synaptic compartments and emphasizing the bidirectional communication essential for proper synapse assembly and function.”

The PSD comprises over a thousand different proteins in mammals.

“The PSD is characterized by high molecular complexity, comprising over a thousand different proteins in mammals [9].”

• cites [9] Kaizuka, 2018, Postsynaptic density proteins and their involvement in neurodevelopmental disorders, J. Biochem. sourceNot checked — no full text of the source

Subunit-specific and activity-dependent regulation of AMPAR trafficking is critical for synaptic strength and plasticity.

“The subunit-specific and activity-dependent regulation of AMPAR trafficking is critical for synaptic strength and plasticity.”

A significant developmental switch occurs in higher brain regions, transitioning from predominantly GluN2B-containing NMDARs in immature synapses to GluN2A-containing NMDARs in mature synapses.

“A significant developmental switch occurs in higher brain regions, transitioning from predominantly GluN2B-containing NMDARs in immature synapses to GluN2A-containing NMDARs in mature synapses [40].”

• cites [40] Elias, 2008, Differential trafficking of AMPA and NMDA receptors by SAP102 and PSD-95 underlies synapse development, Proc. Natl. Acad. Sci. USA sourceNot checked — no full text of the source

Group I mGluRs are regulated by surface expression and trafficking through interactions with specialized PSD proteins.

“Group I mGluRs are regulated by surface expression and trafficking through interactions with specialized PSD proteins.”

• cites [44] Aruna, 2024, Postsynaptic Density Proteins and Their Role in the Trafficking of Group I Metabotropic Glutamate Receptors, J. Membr. Biol. sourceNot checked — no full text of the source

Abnormalities in PSD proteins are strongly linked to various neuropsychiatric diseases, including autism spectrum disorder and schizophrenia.

“The integrity and proper function of PSD proteins are paramount, as abnormalities have been strongly linked to various neuropsychiatric diseases, including autism spectrum disorder and schizophrenia [9].”

• cites [9] Kaizuka, 2018, Postsynaptic density proteins and their involvement in neurodevelopmental disorders, J. Biochem. sourceNot checked — no full text of the source

MAGUK proteins, including PSD-95 and SAP102, are primary scaffolds that interact with GluN2 subunits, anchoring and stabilizing NMDARs at glutamatergic synapses.

“MAGUK proteins, including PSD-95 and synapse-associated protein 102 (SAP102), are primary scaffolds that interact with GluN2 subunits, anchoring and stabilizing NMDARs at glutamatergic synapses [40].”

• cites [40] Elias, 2008, Differential trafficking of AMPA and NMDA receptors by SAP102 and PSD-95 underlies synapse development, Proc. Natl. Acad. Sci. USA sourceNot checked — no full text of the source

Trapping of GABAARs at the synapse is thought to occur through the interaction of the large intracellular loop of the α subunits of synaptic GABAARs with the postsynaptic Gephyrin/CB lattice.

“This trapping is thought to occur through the interaction of the large intracellular loop (IL) of the α subunits of synaptic GABAARs with the postsynaptic Gephyrin/CB lattice.”

• cites [57] George, 2022, Recruitment of Plasma Membrane GABA-A Receptors by Submembranous Gephyrin/Collybistin Clusters, Cell. Mol. Neurobiol. sourceNot checked — no full text of the source

Experimental reconstitution studies in HEK293 cells have demonstrated that the gephyrin/CB lattice can directly trap various GABAAR subunit compositions, including typically synaptic α1β3γ2 GABAARs and some extrasynaptic subtypes like α6β3δ and α1β3.

“Experimental reconstitution studies in HEK293 cells have demonstrated that the gephyrin/CB lattice can directly trap various GABAAR subunit compositions, including typically synaptic α1β3γ2 GABAARs and some extrasynaptic subtypes like α6β3δ and α1β3.”

• cites [57] George, 2022, Recruitment of Plasma Membrane GABA-A Receptors by Submembranous Gephyrin/Collybistin Clusters, Cell. Mol. Neurobiol. sourceNot checked — no full text of the source

Syndapin I has been identified as a novel interaction partner of GlyRβ, co-immunoprecipitating with native GlyRs from brainstem extracts.

“Syndapin I (SdpI) has been identified as a novel interaction partner of GlyRβ, co-immunoprecipitating with native GlyRs from brainstem extracts [61].”

• cites [61] Koch, 2014, Proteomic analysis of glycine receptor beta subunit (GlyRbeta)-interacting proteins: Evidence for syndapin I regulating synaptic glycine receptors, J. Biol. Chem. sourceNot checked — no full text of the source

Collybistin binds to gephyrin and membrane phosphoinositides, thereby anchoring the gephyrin/CB lattice to the postsynaptic membrane.

“The postsynaptic scaffold also includes collybistin (CB), which binds to gephyrin and membrane phosphoinositides, thereby anchoring the gephyrin/CB lattice to the postsynaptic membrane [57].”

• cites [57] George, 2022, Recruitment of Plasma Membrane GABA-A Receptors by Submembranous Gephyrin/Collybistin Clusters, Cell. Mol. Neurobiol. sourceNot checked — no full text of the source

The subunit composition of GABAARs dictates their biophysical properties and subcellular localization, determining whether they mediate phasic (synaptic) or tonic (extrasynaptic) inhibition.

“The subunit composition dictates their biophysical properties and subcellular localization, determining whether they mediate phasic (synaptic) or tonic (extrasynaptic) inhibition.”

• cites [55] Chen, R.J., and Sharma, S. (2025). GABA Receptor. StatPearls, StatPearls Publishing.Not matched

  Couldn’t be matched to a paper in Crossref, so it can’t be checked.

Gephyrin is essential for the clustering and anchoring of a large proportion of synaptic GABAARs, though not all.

“Gephyrin is essential for the clustering and anchoring of a large proportion of synaptic GABAARs, though not all.”

• cites [57] George, 2022, Recruitment of Plasma Membrane GABA-A Receptors by Submembranous Gephyrin/Collybistin Clusters, Cell. Mol. Neurobiol. sourceNot checked — no full text of the source

Trafficking proteins such as vacuolar protein sorting 35 (Vps35) and neurobeachin (Nbea) interact with GlyRβ, involving loop residues adjacent to the gephyrin-binding motif.

“Additionally, trafficking proteins such as vacuolar protein sorting 35 (Vps35) and neurobeachin (Nbea) have been found to interact with GlyRβ, involving loop residues adjacent to the gephyrin-binding motif [61].”

• cites [61] Koch, 2014, Proteomic analysis of glycine receptor beta subunit (GlyRbeta)-interacting proteins: Evidence for syndapin I regulating synaptic glycine receptors, J. Biol. Chem. sourceNot checked — no full text of the source

The β3 subunit appears to be a major determinant for the interaction of GABAARs with gephyrin/CB clusters.

“The β3 subunit appears to be a major determinant for the interaction of GABAARs with gephyrin/CB clusters [57].”

• cites [57] George, 2022, Recruitment of Plasma Membrane GABA-A Receptors by Submembranous Gephyrin/Collybistin Clusters, Cell. Mol. Neurobiol. sourceNot checked — no full text of the source

GABAARs are initially delivered to the cell surface at non-synaptic sites via exocytosis and then undergo lateral diffusion in the plasma membrane to be trapped at the synapse.

“GABAARs are initially delivered to the cell surface at non-synaptic sites via exocytosis and then undergo lateral diffusion in the plasma membrane to be trapped at the synapse.”

• cites [57] George, 2022, Recruitment of Plasma Membrane GABA-A Receptors by Submembranous Gephyrin/Collybistin Clusters, Cell. Mol. Neurobiol. sourceNot checked — no full text of the source

Gephyrin is a multifunctional scaffold protein that forms submembranous postsynaptic planar lattices at both GABAergic and glycinergic synapses.

“Gephyrin is a multifunctional scaffold protein that forms submembranous postsynaptic planar lattices at both GABAergic and glycinergic synapses [57].”

• cites [57] George, 2022, Recruitment of Plasma Membrane GABA-A Receptors by Submembranous Gephyrin/Collybistin Clusters, Cell. Mol. Neurobiol. sourceNot checked — no full text of the source

Glycine receptors mediate synaptic inhibition, particularly in the brainstem and spinal cord.

“Glycine receptors (GlyRs) also mediate synaptic inhibition, particularly in the brainstem and spinal cord [56].”

• cites [56] Wheal, 1998, Molecular mechanisms that underlie structural and functional changes at the postsynaptic membrane during synaptic plasticity, Prog. Neurobiol. sourceNot checked — no full text of the source

LTD is initiated by the dephosphorylation of TARPs by PP1, which disrupts their interaction with PSD-95 and releases GluA1 subunits.

“This process is initiated by the dephosphorylation of TARPs by PP1, which disrupts their interaction with PSD-95 and releases GluA1 subunits.15”

• cites [15] Ivanova, 2016, Bassoon and piccolo regulate ubiquitination and link presynaptic molecular dynamics with activity-regulated gene expression, J. Physiol. sourceNot checked — no full text of the source

LTD can be induced by both NMDAR-dependent and metabotropic glutamate receptor (mGluR)-dependent mechanisms.

“LTD can be induced by both NMDAR-dependent and metabotropic glutamate receptor (mGluR)-dependent mechanisms.”

Subsequent dephosphorylation of GluA1 at the S845 site further promotes receptor endocytosis.

“Subsequent dephosphorylation of GluA1 at the S845 site further promotes receptor endocytosis.15”

• cites [15] Ivanova, 2016, Bassoon and piccolo regulate ubiquitination and link presynaptic molecular dynamics with activity-regulated gene expression, J. Physiol. sourceNot checked — no full text of the source

The homophilic adhesion molecules cadherins are involved in target recognition and synaptic specificity.

“The homophilic adhesion molecules cadherins are involved in target recognition and synaptic specificity [79].”

• cites [79] Munno, 2003, Synaptogenesis in the CNS: An odyssey from wiring together to firing together, J. Physiol. sourceNot checked — no full text of the source

Functional specialization of synapses is driven by the quantitative abundance of shared components rather than the presence of unique proteins.

“The vertebrate nervous system exhibits extensive synaptic diversity, organized into a ‘synaptome’ where functional specialization is driven by the quantitative abundance of shared components rather than the presence of unique proteins [4].”

• cites [4] Schuman, 2025, Understanding the molecular diversity of synapses, Nat. Rev. Neurosci. sourceNot checked — no full text of the source

The extensive molecular repertoire of a synapse provides the potential for an almost unlimited number of synapse types, each with unique functional properties.

“This extensive molecular repertoire provides the potential for an almost unlimited number of synapse types, each with unique functional properties [4].”

• cites [4] Schuman, 2025, Understanding the molecular diversity of synapses, Nat. Rev. Neurosci. sourceNot checked — no full text of the source

The interplay between splicing and PTMs can rewire protein interaction and kinase-substrate networks, contributing to the fine-tuning of synaptic function and adaptability.

“This extensive interplay between splicing and PTMs can rewire protein interaction and kinase-substrate networks, contributing to the fine-tuning of synaptic function and adaptability.”

Synaptic heterogeneity arises from multiple layers of molecular regulation, from gene expression to post-translational modifications.

“This heterogeneity arises from multiple layers of molecular regulation, from gene expression to post-translational modifications.”

The vertebrate nervous system exhibits extensive synaptic diversity organized into a synaptome.

“The vertebrate nervous system exhibits extensive synaptic diversity, organized into a ‘synaptome’ where functional specialization is driven by the quantitative abundance of shared components rather than the presence of unique proteins [4].”

• cites [4] Schuman, 2025, Understanding the molecular diversity of synapses, Nat. Rev. Neurosci. sourceNot checked — no full text of the source

MAGUK family scaffold proteins are central to synaptic architecture, linking receptors to signaling cascades.

“MAGUK family scaffold proteins are central to this architecture, linking receptors to signaling cascades; their dysfunction is a convergent factor in neuropsychiatric disorders such as autism and schizophrenia [56,85].”

• cites [56] Wheal, 1998, Molecular mechanisms that underlie structural and functional changes at the postsynaptic membrane during synaptic plasticity, Prog. Neurobiol. sourceNot checked — no full text of the source
• cites [85] Verpelli, 2012, Scaffold proteins at the postsynaptic density, Adv. Exp. Med. Biol. sourceNot checked — no full text of the source

Dysfunction of MAGUK family scaffold proteins is a convergent factor in neuropsychiatric disorders such as autism and schizophrenia.

“MAGUK family scaffold proteins are central to this architecture, linking receptors to signaling cascades; their dysfunction is a convergent factor in neuropsychiatric disorders such as autism and schizophrenia [56,85].”

• cites [56] Wheal, 1998, Molecular mechanisms that underlie structural and functional changes at the postsynaptic membrane during synaptic plasticity, Prog. Neurobiol. sourceNot checked — no full text of the source
• cites [85] Verpelli, 2012, Scaffold proteins at the postsynaptic density, Adv. Exp. Med. Biol. sourceNot checked — no full text of the source

The synapse is not merely a point of contact but an adaptable functional unit.

“This integrated molecular machinery underscores the synapse not merely as a point of contact but as an adaptable functional unit.”

The proteome of a single synapse is complex, comprising thousands of distinct proteins.

“The proteome of a single synapse is complex, comprising thousands of distinct proteins.”

• cites [4] Schuman, 2025, Understanding the molecular diversity of synapses, Nat. Rev. Neurosci. sourceNot checked — no full text of the source