The receptor-associated protein of the synapse (RAPSYN) is a peripheral membrane protein located in the skeletal muscles. It is co-localized along with nicotinic acetylcholine receptors (nAChRs) at the postsynaptic membrane due to the influence of neural agrin. Rapsyn consists of a myristoylated N-terminal, seven putative tetratricopeptide repeats, a coiled-coil domain, the RING-H2 domain, and the consensus sequence for phosphorylation.
Immunogen
whole purified rapsyn from Torpedo californica electric organ postsynaptic membrane.
Application
Monoclonal Anti-Rapsyn antibody produced in mouse has been used in western blotting (0.5 μg/ml ) and immunocytochemistry (1:200)[1].
Biochem/physiol Actions
The receptor-associated protein of the synapse (RAPSYN) participates in assembling the structure of the nicotinic postsynaptic membrane. It is required for the functioning of the neuromuscular junction. Mutations in the RAPSN gene are associated with endplate acetylcholine-receptor deficiency and Myasthenic syndrome.
Physical form
Solution in phosphate buffered saline containing 1.0 mg/mL BSA and 0.05% sodium azide.
Disclaimer
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The Journal of biological chemistry, 276(10), 7475-7483 (2000-11-23)
Rapsyn, a 43-kDa peripheral membrane protein of skeletal muscle, is essential for clustering nicotinic acetylcholine receptors (nAChR) in the postsynaptic membrane. Previous studies with rapsyn NH(2)-terminal fragments fused to green fluorescent protein, expressed in 293T cells along with nAChRs, establish
American journal of human genetics, 70(4), 875-885 (2002-01-16)
Congenital myasthenic syndromes (CMSs) stem from genetic defects in endplate (EP)-specific presynaptic, synaptic, and postsynaptic proteins. The postsynaptic CMSs identified to date stem from a deficiency or kinetic abnormality of the acetylcholine receptor (AChR). All CMSs with a kinetic abnormality
Molecular and cellular biology, 24(16), 7188-7196 (2004-07-30)
Rapsyn is a synapse-specific protein that is required for clustering acetylcholine receptors at the neuromuscular junction. Analysis of the rapsyn promoter revealed a consensus site for the transcription factor Kaiso within a region that is mutated in a subset of
The Journal of biological chemistry, 276(27), 24911-24917 (2001-05-09)
Rapsyn, a peripheral membrane protein of skeletal muscle, is necessary for the formation of the highly organized structure of the vertebrate neuromuscular junction. For mice lacking rapsyn, there is a failure of postsynaptic specialization characterized by an absence of nicotinic
Proceedings of the National Academy of Sciences of the United States of America, 110(26), 10622-10627 (2013-06-12)
The scaffolding protein at the neuromuscular junction, rapsyn, enables clustering of nicotinic acetylcholine receptors in high concentration and is critical for muscle function. Patients with insufficient receptor clustering suffer from muscle weakness. However, the detailed organization of the receptor-rapsyn network
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