SNAPIN Component of the BLOC-1 complex, a complex that is required for normal biogenesis of lysosome-related organelles (LRO), such as platelet dense granules and melanosomes. In concert with the AP-3 complex, the BLOC-1 complex is required to target membrane protein cargos into vesicles assembled at cell bodies for delivery into neurites and nerve terminals. The BLOC-1 complex, in association with SNARE proteins, is also proposed to be involved in neurite extension. Plays a role in intracellular vesicle trafficking and synaptic vesicle recycling. May modulate a step between vesicle priming, fusion and calcium-dependent neurotransmitter release through its ability to potentiate the interaction of synaptotagmin with the SNAREs and the plasma-membrane-associated protein SNAP25. Its phosphorylation state influences exocytotic protein interactions and may regulate synaptic vesicle exocytosis. May also have a role in the mechanisms of SNARE-mediated membrane fusion in non-neuronal cells. As part of the BORC complex may play a role in lysosomes movement and localization at the cell periphery. Associated with the cytosolic face of lysosomes, the BORC complex may recruit ARL8B and couple lysosomes to microtubule plus-end-directed kinesin motor. Belongs to the SNAPIN family. Expressed in male germ cells of adult testis (at protein level). Note: This description may include information from UniProtKB.
Protein type: Vesicle
Chromosomal Location of mouse Ortholog: 3|3 F1
Cellular Component:  acrosomal vesicle; BLOC-1 complex; BORC complex; cytoplasm; cytoplasmic side of lysosomal membrane; cytoplasmic vesicle; cytosol; Golgi apparatus; lysosome; manchette; membrane; perinuclear region of cytoplasm; secretory granule; synapse; synaptic vesicle
Molecular Function:  protein binding; SNARE binding
Biological Process:  anterograde axonal transport; anterograde synaptic vesicle transport; autophagosome maturation; calcium-ion regulated exocytosis; chemical synaptic transmission; endosome to lysosome transport; establishment of vesicle localization; exocytosis; intracellular protein transport; late endosome to lysosome transport; lysosomal lumen acidification; lysosome localization; lysosome organization; melanosome organization; negative regulation of neuron projection development; neuron cellular homeostasis; neuron projection development; organelle transport along microtubule; protein maturation; protein-containing complex localization; regulation of endosome size; regulation of lysosome size; regulation of protein binding; regulation of synaptic vesicle exocytosis; retrograde axonal transport; synaptic vesicle exocytosis; synaptic vesicle fusion to presynaptic active zone membrane; synaptic vesicle maturation; synaptic vesicle transport; terminal button organization
Reference #:  Q9Z266 (UniProtKB)
Alt. Names/Synonyms: 25kDa; AA407989; AV026596; Biogenesis of lysosome-related organelles complex 1 subunit 7; Bloc; BLOC-1 subunit 7; Bloc1s7; OTTMUSP00000024888; Sna; SNAP-associated protein; Snap25bp; Snapap; Snapin; SNAPN; SNARE-associated protein Snapin; synaptosomal-associated protein 25 binding protein; Synaptosomal-associated protein 25-binding protein; synaptosomal-associated protein, 25 kDa, binding protein
Gene Symbols: Snapin
Molecular weight: 14,904 Da
Basal Isoelectric point: 9.35  Predict pI for various phosphorylation states
Select Structure to View Below


Protein Structure Not Found.

Cross-references to other databases:  AlphaFold  |  STRING  |  Reactome  |  BioGPS  |  Pfam  |  Phospho.ELM  |  NetworKIN  |  UniProtKB  |  Entrez-Gene  |  Ensembl Gene