Gene Symbol: Rapsn
Description: receptor-associated protein of the synapse
Alias: rapsyn, 43 kDa receptor-associated protein of the synapse, nicotinic acetylcholine receptor-associated 46K protein, receptor-associated protein of the synapse, 43 kDa
Species: rat
Products:     Rapsn

Top Publications

  1. Noakes P, Phillips W, Hanley T, Sanes J, Merlie J. 43K protein and acetylcholine receptors colocalize during the initial stages of neuromuscular synapse formation in vivo. Dev Biol. 1993;155:275-80 pubmed
    ..The precise colocalization of 43K and AChRs persisted through development. These results are consistent with 43K being involved in the nerve-induced clustering of AChRs during synapse formation. ..
  2. Marchand S, Devillers Thiery A, Pons S, Changeux J, Cartaud J. Rapsyn escorts the nicotinic acetylcholine receptor along the exocytic pathway via association with lipid rafts. J Neurosci. 2002;22:8891-901 pubmed
    The 43 kDa receptor-associated protein rapsyn is a myristoylated peripheral protein that plays a central role in nicotinic acetylcholine receptor (AChR) clustering at the neuromuscular junction...
  3. Osman A, Schrader A, Hawkes A, Akil O, Bergeron A, Lustig L, et al. Muscle-like nicotinic receptor accessory molecules in sensory hair cells of the inner ear. Mol Cell Neurosci. 2008;38:153-69 pubmed publisher
    ..MuSK, rapsyn and RIC-3 are accessory molecules associated with muscle and brain nAChR function...
  4. Francolini M, Brunelli G, Cambianica I, Barlati S, Barbon A, La Via L, et al. Glutamatergic reinnervation and assembly of glutamatergic synapses in adult rat skeletal muscle occurs at cholinergic endplates. J Neuropathol Exp Neurol. 2009;68:1103-15 pubmed publisher
    ..of membranes from reinnervated muscle showed that AMPA receptor subunits GluR1 and GluR2 coimmunoprecipitate with rapsyn, the AChR-anchoring protein at the NMJ...
  5. Witzemann V, Chevessier F, Pacifici P, Yampolsky P. The neuromuscular junction: selective remodeling of synaptic regulators at the nerve/muscle interface. Mech Dev. 2013;130:402-11 pubmed publisher
    ..The results show that detailed analysis of mouse models will help to understand the complexity in mechanisms that regulate synaptic remodeling. ..
  6. Chen P, Martinez Pena y Valenzuela I, Aittaleb M, Akaaboune M. AChRs Are Essential for the Targeting of Rapsyn to the Postsynaptic Membrane of NMJs in Living Mice. J Neurosci. 2016;36:5680-5 pubmed publisher
    b>Rapsyn, a 43 kDa scaffold protein, is required for the clustering of acetylcholine receptors (AChRs) at synaptic sites between mammalian motor neurons and muscle cells...
  7. Terrado J, Burgess R, DeChiara T, Yancopoulos G, Sanes J, Kato A. Motoneuron survival is enhanced in the absence of neuromuscular junction formation in embryos. J Neurosci. 2001;21:3144-50 pubmed
    ..e., null mutants for agrin, nerve-derived agrin, rapsyn, and MuSK)...
  8. Moransard M, Borges L, Willmann R, Marangi P, Brenner H, Ferns M, et al. Agrin regulates rapsyn interaction with surface acetylcholine receptors, and this underlies cytoskeletal anchoring and clustering. J Biol Chem. 2003;278:7350-9 pubmed
    The acetylcholine receptor (AChR)-associated protein rapsyn is essential for neuromuscular synapse formation and clustering of AChRs, but its mode of action remains unclear...
  9. Martinez Martinez P, Phernambucq M, Steinbusch L, Schaeffer L, Berrih Aknin S, Duimel H, et al. Silencing rapsyn in vivo decreases acetylcholine receptors and augments sodium channels and secondary postsynaptic membrane folding. Neurobiol Dis. 2009;35:14-23 pubmed publisher
    The receptor-associated protein of the synapse (rapsyn) is required for anchoring and stabilizing the nicotinic acetylcholine receptor (AChR) in the postsynaptic membrane of the neuromuscular junction (NMJ) during development...

More Information


  1. Sigoillot S, Bourgeois F, Lambergeon M, Strochlic L, Legay C. ColQ controls postsynaptic differentiation at the neuromuscular junction. J Neurosci. 2010;30:13-23 pubmed publisher
    ..MuSK promotes acetylcholine receptor (AChR) clustering in a process mediated by rapsyn, a cytoplasmic protein that stimulates AChR packing in clusters and regulates synaptic gene transcription...