SYT1

SYT1
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 2K45, 2K4A, 2K8M, 2KI6, 2LHA, 2N1T, 2R83, 3F00, 3F01, 3F04, 3F05, 4ISQ, 4V11
Identifiers
Aliases	SYT1, P65, SVP65, SYT, synaptotagmin 1, BAGOS
External IDs	OMIM: 185605; MGI: 99667; HomoloGene: 4122; GeneCards: SYT1; OMA:SYT1 - orthologs
Gene location (Human) Chr. Chromosome 12 (human) Band 12q21.2 Start 78,863,993 bp End 79,452,008 bp
Gene location (Mouse) Chr. Chromosome 10 (mouse) Band 10 D1|10 56.52 cM Start 108,333,511 bp End 108,846,843 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in middle temporal gyrus Brodmann area 23 endothelial cell lateral nuclear group of thalamus orbitofrontal cortex frontal pole superior frontal gyrus Pons Brodmann area 10 cerebellar vermis Top expressed in medial dorsal nucleus subiculum medial geniculate nucleus superior frontal gyrus dentate gyrus of hippocampal formation granule cell lateral geniculate nucleus lateral septal nucleus primary motor cortex primary visual cortex neural layer of retina More reference expression data BioGPS More reference expression data
Gene ontology Molecular function protein C-terminus binding metal ion binding phosphatidylinositol-4,5-bisphosphate binding calcium ion binding clathrin binding identical protein binding calcium-dependent protein binding phospholipid binding SNARE binding calmodulin binding 1-phosphatidylinositol binding phosphatidylserine binding low-density lipoprotein particle receptor binding syntaxin binding protein binding syntaxin-1 binding calcium-dependent phospholipid binding syntaxin-3 binding protein heterodimerization activity calcium ion sensor activity Cellular component terminal bouton SNARE complex clathrin-sculpted glutamate transport vesicle membrane intracellular organelle cytoplasm transport vesicle membrane synapse integral component of membrane Golgi apparatus cell junction clathrin-sculpted gamma-aminobutyric acid transport vesicle membrane presynaptic membrane dense core granule clathrin-sculpted monoamine transport vesicle membrane neuron projection chromaffin granule membrane membrane excitatory synapse synaptic vesicle secretory granule clathrin-sculpted acetylcholine transport vesicle membrane cytoplasmic vesicle synaptic vesicle membrane plasma membrane integral component of synaptic vesicle membrane axon clathrin-coated vesicle membrane neuron projection terminus exocytic vesicle hippocampal mossy fiber to CA3 synapse glutamatergic synapse Biological process detection of calcium ion positive regulation of vesicle fusion chemical synaptic transmission synaptic vesicle exocytosis positive regulation of calcium ion-dependent exocytosis response to calcium ion regulation of regulated secretory pathway brain development glutamate secretion positive regulation of dendrite extension positive regulation of synaptic transmission regulation of synaptic transmission, glutamatergic regulation of exocytosis synaptic vesicle endocytosis vesicle docking cell differentiation fast, calcium ion-dependent exocytosis of neurotransmitter neurotransmitter secretion cellular response to calcium ion vesicle fusion regulation of calcium ion-dependent exocytosis calcium ion-regulated exocytosis of neurotransmitter regulation of dopamine secretion protein homooligomerization protein heterooligomerization membrane organization vesicle-mediated transport calcium-ion regulated exocytosis calcium-dependent activation of synaptic vesicle fusion spontaneous neurotransmitter secretion synchronous neurotransmitter secretion regulation of synaptic vesicle exocytosis positive regulation of calcium ion-dependent exocytosis of neurotransmitter Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 6857 20979 Ensembl ENSG00000067715 ENSMUSG00000035864 UniProt P21579 P46096 RefSeq (mRNA) NM_001135805 NM_001135806 NM_001291901 NM_005639 NM_001252341 NM_001252342 NM_009306 NM_001358501 NM_001358502 NM_001358503 NM_001358504 NM_001358506 RefSeq (protein) NP_001129277 NP_001129278 NP_001278830 NP_005630 NP_001239270 NP_001239271 NP_033332 NP_001345430 NP_001345431 NP_001345432 NP_001345433 NP_001345435 Location (UCSC) Chr 12: 78.86 – 79.45 Mb Chr 10: 108.33 – 108.85 Mb PubMed search
Wikidata
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Synaptotagmin-1 is a protein that in humans is encoded by the SYT1 gene.

Function

Synaptotagmins are integral membrane proteins of synaptic vesicles thought to serve as sensors for calcium ions (Ca²⁺) in the process of vesicular trafficking and exocytosis. Calcium ion binding to synaptotagmin I participates in triggering neurotransmitter release at the synapse (Fernandez-Chacon et al., 2001). [Supplied by OMIM]

SYT1 is the master switch responsible for allowing the human brain to release neurotransmitters. SYT1 senses calcium ion concentrations as low as 10 ppm and subsequently signals the SNARE complex to open fusion pores.

Interactions

SYT1 has been shown to interact with SNAP-25, STX1A and S100A13.

Clinical Significance

Mutations in the SYT1 gene cause a rare neurodevelopmental disorder known as SYT1-associated neurodevelopmental disorder (or Baker-Gordon Syndrome).

Further reading

• Mochly-Rosen D, Miller KG, Scheller RH, Khaner H, Lopez J, Smith BL (Sep 1992). "p65 fragments, homologous to the C2 region of protein kinase C, bind to the intracellular receptors for protein kinase C". Biochemistry. 31 (35): 8120–4. doi:10.1021/bi00150a003. PMID 1326322.
• McMahon HT, Missler M, Li C, Südhof TC (Oct 1995). "Complexins: cytosolic proteins that regulate SNAP receptor function". Cell. 83 (1): 111–9. doi:10.1016/0092-8674(95)90239-2. PMID 7553862. S2CID 675343.
• O'Regan S, Diebler MF, Meunier FM, Vyas S (Jan 1995). "A Ewing's sarcoma cell line showing some, but not all, of the traits of a cholinergic neuron". Journal of Neurochemistry. 64 (1): 69–76. doi:10.1046/j.1471-4159.1995.64010069.x. PMID 7798952. S2CID 20958851.
• Zhang JZ, Davletov BA, Südhof TC, Anderson RG (Sep 1994). "Synaptotagmin I is a high affinity receptor for clathrin AP-2: implications for membrane recycling". Cell. 78 (5): 751–60. doi:10.1016/S0092-8674(94)90442-1. PMID 8087843. S2CID 44550431.
• Chapman ER, Blasi J, An S, Brose N, Johnston PA, Südhof TC, Jahn R (Aug 1996). "Fatty acylation of synaptotagmin in PC12 cells and synaptosomes". Biochemical and Biophysical Research Communications. 225 (1): 326–32. doi:10.1006/bbrc.1996.1174. PMID 8769138.
• Perin MS (Oct 1996). "Mirror image motifs mediate the interaction of the COOH terminus of multiple synaptotagmins with the neurexins and calmodulin". Biochemistry. 35 (43): 13808–16. doi:10.1021/bi960853x. PMID 8901523.
• Betz A, Okamoto M, Benseler F, Brose N (Jan 1997). "Direct interaction of the rat unc-13 homologue Munc13-1 with the N terminus of syntaxin". The Journal of Biological Chemistry. 272 (4): 2520–6. doi:10.1074/jbc.272.4.2520. PMID 8999968.
• Shao X, Li C, Fernandez I, Zhang X, Südhof TC, Rizo J (Jan 1997). "Synaptotagmin-syntaxin interaction: the C2 domain as a Ca2+-dependent electrostatic switch". Neuron. 18 (1): 133–42. doi:10.1016/S0896-6273(01)80052-0. PMID 9010211. S2CID 17947552.
• Charvin N, L'evêque C, Walker D, Berton F, Raymond C, Kataoka M, Shoji-Kasai Y, Takahashi M, De Waard M, Seagar MJ (Aug 1997). "Direct interaction of the calcium sensor protein synaptotagmin I with a cytoplasmic domain of the alpha1A subunit of the P/Q-type calcium channel". The EMBO Journal. 16 (15): 4591–6. doi:10.1093/emboj/16.15.4591. PMC 1170085. PMID 9303303.
• Mouta Carreira C, LaVallee TM, Tarantini F, Jackson A, Lathrop JT, Hampton B, Burgess WH, Maciag T (Aug 1998). "S100A13 is involved in the regulation of fibroblast growth factor-1 and p40 synaptotagmin-1 release in vitro". The Journal of Biological Chemistry. 273 (35): 22224–31. doi:10.1074/jbc.273.35.22224. PMID 9712836.
• Thomas DM, Ferguson GD, Herschman HR, Elferink LA (Jul 1999). "Functional and biochemical analysis of the C2 domains of synaptotagmin IV". Molecular Biology of the Cell. 10 (7): 2285–95. doi:10.1091/mbc.10.7.2285. PMC 25443. PMID 10397765.
• Gerona RR, Larsen EC, Kowalchyk JA, Martin TF (Mar 2000). "The C terminus of SNAP25 is essential for Ca(2+)-dependent binding of synaptotagmin to SNARE complexes". The Journal of Biological Chemistry. 275 (9): 6328–36. doi:10.1074/jbc.275.9.6328. PMID 10692432.
• Mizutani A, Fukuda M, Ibata K, Shiraishi Y, Mikoshiba K (Mar 2000). "SYNCRIP, a cytoplasmic counterpart of heterogeneous nuclear ribonucleoprotein R, interacts with ubiquitous synaptotagmin isoforms". The Journal of Biological Chemistry. 275 (13): 9823–31. doi:10.1074/jbc.275.13.9823. PMID 10734137.
• Kimura N, Shiraishi S, Mizunashi K, Ohtsu H, Kimura I (Mar 2001). "Synaptotagmin I expression in mast cells of normal human tissues, systemic mast cell disease, and a human mast cell leukemia cell line". The Journal of Histochemistry and Cytochemistry. 49 (3): 341–6. doi:10.1177/002215540104900308. PMID 11181737.
• Fernández-Chacón R, Königstorfer A, Gerber SH, García J, Matos MF, Stevens CF, Brose N, Rizo J, Rosenmund C, Südhof TC (Mar 2001). "Synaptotagmin I functions as a calcium regulator of release probability". Nature. 410 (6824): 41–9. doi:10.1038/35065004. PMID 11242035. S2CID 1756258.
• Fukuda M, Mikoshiba K (Mar 2001). "Synaptotagmin-like protein 1-3: a novel family of C-terminal-type tandem C2 proteins". Biochemical and Biophysical Research Communications. 281 (5): 1226–33. doi:10.1006/bbrc.2001.4512. PMID 11243866.
• Martina JA, Bonangelino CJ, Aguilar RC, Bonifacino JS (May 2001). "Stonin 2: an adaptor-like protein that interacts with components of the endocytic machinery". The Journal of Cell Biology. 153 (5): 1111–20. doi:10.1083/jcb.153.5.1111. PMC 2174325. PMID 11381094.
• Landriscina M, Bagalá C, Mandinova A, Soldi R, Micucci I, Bellum S, Prudovsky I, Maciag T (Jul 2001). "Copper induces the assembly of a multiprotein aggregate implicated in the release of fibroblast growth factor 1 in response to stress". The Journal of Biological Chemistry. 276 (27): 25549–57. doi:10.1074/jbc.M102925200. PMID 11432880.
• Coppola T, Magnin-Luthi S, Perret-Menoud V, Gattesco S, Schiavo G, Regazzi R (Aug 2001). "Direct interaction of the Rab3 effector RIM with Ca2+ channels, SNAP-25, and synaptotagmin". The Journal of Biological Chemistry. 276 (35): 32756–62. doi:10.1074/jbc.M100929200. PMID 11438518.