Peptide sequence around aa.257~261(G-P-T-S-F)derived from Rat synaptophysin 2.
Alternative Synonym:
Synpr
Synaptophysin (SYP) is a neuronal synaptic vesicle glycoprotein that is expressed in neuroendocrine cells and neoplasms, and thus can be used as a marker in tumor diagnosis (1). Synaptophysin contains four transmembrane domains that form a hexameric channel or gap junction-like pore (2). Synaptophysin binds to the SNARE protein synaptobrevin/VAMP, which prevents the inclusion of synaptobrevin in the synaptic vesicle fusion complex and creates a pool of synaptobrevin for exocytosis when synapse activity increases (3). Synaptophysin is also responsible for targeting synaptobrevin 2/VAMP2 to synaptic vesicles, a critical component of the fusion complex (4). Wiedenmann, B. et al. (1986) Proc Natl Acad Sci USA 83, 3500-4. Valtorta, F. et al. (2004) Bioessays 26, 445-53. Arthur, C.P. and Stowell, M.H. (2007) Structure 15, 707-14. Bonanomi, D. et al. (2007) Biochem J 404, 525-34.
