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0SYT3_HUMAN*   SwissProt (?) | Description Local Annotation Link Reference
General Information
NameSYT3
DescriptionSynaptotagmin-3 (synaptotagmin iii) (sytiii).
SpeciesHomo sapiens (NCBI taxonomy ID: 9606)
GON/A
Domain Architecture (Details)
InterPro domains assigned to SynO:
Synaptotagmins are synaptic vesicle membrane proteins found in abundance in nerve cells and some endocrine cells . The amino acid sequence of synaptotagmin comprises a single transmembrane region with a short vesicular N-terminal region.nd a cytoplasmic C-terminal region containing 2 internal repeats similar to the C2 regulatory domain of protein kinase C. The protein is believed to be important in the docking and fusion of synaptic vesicles with the plasma membrane..e. with neurotransmitter release .The 2 synaptotagmin C2 domains have been shown to have different functions: C2A binds phospholipid in a calcium-dependent manner.hile C2B binds inositol polyphosphate and phospholipid irrespective of the presence of Ca2+ . The structure of C2 domains in synaptotagmin I has been deduced: the C2 polypeptide forms an 8-stranded beta-sandwich constructed around a conserved 4-stranded motif.esignated a C2 key . The calcium binding region is a cup-shaped depression formed by the N- and C-terminal loops of the C2-key motif.hile the site of phospholipid interaction is thought to be a polybasic sequence on the hairpin loop connecting strands 3 and 4 .
  IPR001565:Synaptotagmin
InterPro domains unassigned to SynO:
The C2 domain is a Ca2+-dependent membrane-targeting module found in many cellular proteins involved in signal transduction or membrane trafficking. C2 domains are unique among membrane targeting domains in that they show wide range of lipid selectivity for the major components of cell membranes.ncluding phosphatidylserine and phosphatidylcholine. This C2 domain is about 116 amino-acid residues and is located between the two copies ofthe C1 domain in Protein Kinase C (that bind phorbol esters and diacylglycerol) (see )and the protein kinase catalytic domain (see ). Regions withsignificant homology to the C2-domain have been found in many proteins.The C2 domain is thought to be involved in calcium-dependent phospholipidbinding and in membrane targetting processes such as subcellular localisation. The 3D structure of theC2 domain of synaptotagmin has been reported.he domain forms an eight-stranded beta sandwich constructed around a conserved 4-stranded motif.esignated a C2 key . Calcium binds ina cup-shaped depression formed by the N- and C-terminal loops of theC2-key motif. Structural analyses of several C2 domains have shown them to consist of similar ternary structures in which three Ca2+-binding loops are located at the end of an 8 stranded antiparallel beta sandwich.
  IPR000008:C2 calcium-dependent membrane targeting
The Ca2+-dependent.ipid-binding domain (CaLB) has been identified in a number of proteins.or example the amino-terminal.38 amino acid C2 domain of cytosolic phospholipase A2 (cPLA2-C2) which mediates an initial step in the production of lipid mediators of inflammation: the Ca2+-dependent translocation of the enzyme to intracellular membranes with subsequent liberation of arachidonic acid. The domain is composed of eight antiparallel beta-strands with six interconnecting loops that fits the "type II" topology for C2 domains. The structure has been identified as a beta-sandwich in the "Greek key" motif .The SSF signature in this entry is currently under review. Please be aware that some of the protein hits may be false positives.
  IPR008973:C2 calcium/lipid-binding region, CaLB
IPR000008:C2 
Evalue:-43.0087738037109 
Location:316-402IPR000008:C2 
Evalue:-34.5686378479004 
Location:448-536
SequencesProtein: SYT3_HUMAN (590 aa)
mRNA: NM_032298
Local Annotation
Synapse Ontology
proteins that help to traffick the vesicle, such as synaptobrevin/Vamp, synaptotagmin, Rab3-rabphilin complex.
sdb:0097 vesicle trafficking protein  (Evidence:keywords,domains)
Various stages of the synaptic vesicle cycle, including attachment, prefusion, triggering, recycling and reloading of the vesicles with transmitter.
sdb:0098 synaptic vesicle cycling  (Evidence:keywords,domains)
KO assignmentNot mapped to KEGG
Loci Structure (Details)Loci index, Chromosomal location, Length, Possible relational loci clusterExon1: 168 residues, 55817047-55817550Exon2: 25 residues, 55817755-55817824Exon3: 46 residues, 55820230-55820363Exon4: 59 residues, 55820461-55820633Exon5: 42 residues, 55820965-55821086Exon6: 75 residues, 55824362-55824581Exon7: 131 residues, 55824852-55825240Exon8: 177 residues, 55827354-55827880Exon9: 262 residues, 55832332-55833114Exon10: 2 residues, -Jump to SYT3_HUMAN  
Tune and view alternative isoforms
Loci Cluster (Details)Loci: 3124 53589943-53639205 ~-49K 19224(GRIN2D)(+)Loci: 3125 53656317-53661179 ~-5K 19226(KCNJ14)(+)Loci: 3126 53747240-53794495 ~-47K 19229(SULT2B1)(+)Loci: 4406 53833083-53841263 ~-8K 19240(CA11)(-)Loci: 4407 53990131-54006113 ~-16K 19255(BCAT2)(-)Loci: 4408 54262487-54268010 ~-6K 19284(-)Loci: 3127 54309429-54313528 ~-4K 19290(LIN7B)(+)Loci: 3128 54314474-54346090 ~-32K 19292(PPFIA3)(+)Loci: 4409 54484705-54520286 ~-36K 19297(SLC6A16)(-)Loci: 3129 54669297-54681299 ~-12K 19311(FLT3LG)(+)Loci: 4410 54854641-54860926 ~-6K 19323(IRF3)(-)Loci: 3130 54886218-54908800 ~-23K 19334(CPT1C)(+)Loci: 3131 54961991-55002179 ~-40K 19337(AP2A1)(+)Loci: 3132 55124271-55129003 ~-5K 19355(ATF5)(+)Loci: 4411 55510576-55524446 ~-14K 19365(KCNC3)(-)Loci: 4412 55817047-55833114 ~-16K 19382(SYT3)(-)Loci: 4413 55856895-55912007 ~-55K 19383(SHANK1)(-)Loci: 3123 53559468-53571439 ~-12K 19220(SYNGR4)(+)Link out to UCSC