Cited by 256Axon Guidance and Neuronal SignalingNeuroscience and Neuropharmacology ResearchGenetics and Neurodevelopmental Disorders

EphB-mediated degradation of the RhoA GEF Ephexin5 relieves a developmental brake on excitatory synapse formation

Open access
Margolis, Seth S., Salogiannis, John, Lipton, David M., Mandel-Brehm, Caleigh, Wills, Zachary P., Mardinly, Alan R., Hu, Linda, Greer, Paul L. +5 more·2010·Cell

Abstract

The mechanisms that promote excitatory synapse formation and maturation have been extensively studied. However, the molecular events that limit excitatory synapse development so that synapses form at the right time and place and in the correct numbers are less well understood. We have identified a RhoA guanine nucleotide exchange factor, Ephexin5, which negatively regulates excitatory synapse development until EphrinB binding to the EphB receptor tyrosine kinase triggers Ephexin5 phosphorylation, ubiquitination, and degradation. The degradation of Ephexin5 promotes EphB-dependent excitatory synapse development and is mediated by Ube3A, a ubiquitin ligase that is mutated in the human cognitive disorder Angelman syndrome and duplicated in some forms of Autism Spectrum Disorders (ASDs). These findings suggest that aberrant EphB/Ephexin5 signaling during the development of synapses may contribute to the abnormal cognitive function that occurs in Angelman syndrome and, possibly, ASDs.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1016/j.cell.2010.09.038

Cites

42 of 42 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Array tomography is a powerful tool for high resolution imaging and quantification of synaptic density in vivo.

    “using array tomography (AT), a powerful tool for high resolution imaging and quantification of synaptic density in vivo (Greer et al., 2010; Margolis et al., 2010; Micheva and Smith, 2007; Ross et al., 2010).”

    From Microglia Sculpt Postnatal Neural Circuits in an Activity and Complement-Dependent Manner (2012) · cites this paper as Margolis et al., 2010

    The Results section (‘Ephexin5 negatively regulates excitatory synapse number’; page unavailable) reports using array tomography to quantify excitatory synapses in mouse hippocampus in vivo. The Experimental Procedures confirm use of the method, but our copy does not characterize its imaging resolution or describe it as a ‘powerful tool.’ (LLM, conf=0.82)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Margolis, S. S., Salogiannis, J., Lipton, D. M., Mandel-Brehm, C., Wills, Z. P., Mardinly, A. R., Hu, L., Greer, P. L., Bikoff, J. B., Ho, H.-Y. H., Soskis, M. J., Sahin, M., & Greenberg, M. E.
Affiliations
Harvard University (US)
Corresponding author
Greenberg, Michael E.
Venue
Cell
Publisher
Elsevier BV
Published
2010-10
Volume
143
Issue
3
Pages
442-455
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2031746153
Cited by
256
References
42
Citations by year
2026: 8 · 2025: 8 · 2024: 12 · 2023: 20 · 2022: 10 · 2021: 14 · 2020: 16 · 2019: 12 · 2018: 13 · 2017: 16 · 2016: 21 · 2015: 20 · 2014: 17 · 2013: 19 · 2012: 27
FWCI
8.80
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (5r01ns045500-29)
  • National Institute on Aging (5T32AG00222-15, T32AG000222)
  • National Institute of Neurological Disorders and Stroke (R01-NS-045500, R01 5R01NS045500)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Axon Guidance and Neuronal Signaling
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
Keywords
EphB receptors, protein degradation, ubiquitination, UBE3A, Angelman syndrome, autism spectrum disorder, synapse maturation, receptor tyrosine kinase signaling
MeSH terms
Animals, Child, Child Development Disorders, Pervasive, Embryo, Mammalian, Humans, Synapses, Angelman Syndrome, Dentate Gyrus, Rats, Long-Evans, rhoA GTP-Binding Protein, Receptors, Eph Family, Ubiquitin-Protein Ligases, Mice, Rats, Gene Knockout Techniques

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review