Cited by 243Cellular transport and secretionNeuroscience and Neuropharmacology ResearchProtein Kinase Regulation and GTPase Signaling

The RIM/NIM Family of Neuronal C2 Domain Proteins

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Wang, Yun, Sugita, Shuzo, Südhof, Thomas C.·2000·Journal of Biological Chemistry

Abstract

RIM1 is a putative effector protein for Rab3s, synaptic GTP-binding proteins. RIM1 is localized close to the active zone at the synapse, where it interacts in a GTP-dependent manner with Rab3 located on synaptic vesicles. We now describe a second RIM protein, called RIM2, that is highly homologous to RIM1 and also expressed primarily in brain. Like RIM1, RIM2 contains an N-terminal zinc finger domain that binds to Rab3 as a function of GTP, a central PDZ domain, and two C-terminal C(2) domains that are separated by long alternatively spliced sequences. Unexpectedly, the 3'-end of the RIM2 gene produces an independent mRNA that encodes a smaller protein referred as NIM2. NIM2 is composed of a unique N-terminal sequence followed by the C-terminal part of RIM2. Data bank searches identified a third RIM/NIM-related gene, which encodes a NIM isoform referred to as NIM3; no RIM transcript from this gene was detected. To test if NIMs, like RIMs, may function in secretion, we investigated the effect of NIM3 on calcium-triggered exocytosis in PC12 cells. NIM3 induced a dramatic increase in calcium-evoked exocytosis (50%), with no significant effect on base-line release, suggesting that NIMs, like RIMs, regulate exocytosis The combination of conserved and variable sequences in RIMs and NIMs indicates that the individual domains of these proteins provide binding sites for interacting molecules during exocytosis, as shown for the zinc finger domain of RIM, which binds to GTP-bound Rab3s.…

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Crossref · 10.1074/jbc.m909008199

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  • RIM-BPs bind to RIMs and to N-, P/Q-, and L-type Ca2+ channels.

    “However, the latter identification may be erroneous since subsequent studies showed that RIM-BPs are highly expressed only in brain and not peripherally and tightly bind to RIM (Wang et al., 2000) and to N-, P/Q-, and L-type Ca2+ channels (Hibino et al., 2002; Kaeser et al., 2011).”

    From The Presynaptic Active Zone (2012) · cites this paper as Wang et al., 2000

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Authors
Wang, Y., Sugita, S., & Südhof, T. C.
Affiliations
Howard Hughes Medical Institute (US)
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2000-06
Volume
275
Issue
26
Pages
20033-20044
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2000501974
Cited by
243
References
42
Citations by year
2026: 2 · 2025: 2 · 2024: 4 · 2023: 11 · 2022: 9 · 2021: 5 · 2020: 9 · 2019: 6 · 2018: 8 · 2017: 7 · 2016: 5 · 2015: 9 · 2014: 9 · 2013: 11 · 2012: 11
FWCI
5.32
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
RIM1, C2 domain proteins, Rab3, synaptic vesicle exocytosis, calcium-triggered exocytosis, synaptic active zone, zinc finger, PDZ domain, alternative splicing, Src homology 3 domain, fibronectin type III domain, protein-protein interaction
MeSH terms
Rabphilin-3A, Amino Acid Sequence, Animals, Brain, Carrier Proteins, Chromatography, Affinity, Cloning, Molecular, DNA-Binding Proteins, Exocytosis, Fungal Proteins, Glutathione Transferase, Humans, Molecular Sequence Data, Nerve Tissue Proteins, Nuclear Proteins, Polymorphism, Genetic, Recombinant Fusion Proteins, Tissue Distribution, Transfection, PC12 Cells, Sequence Homology, Amino Acid, Alternative Splicing, Sequence Analysis, DNA, Protein Structure, Tertiary, DNA, Complementary, src Homology Domains, COS Cells, rab GTP-Binding Proteins, rab3 GTP-Binding Proteins, Two-Hybrid System Techniques, Membrane Transport Proteins, Vesicular Transport Proteins, Adaptor Proteins, Signal Transducing, Rats

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