may participate in the regulation of synaptic vesicle docking and fusion, possibly through interaction with GTP-binding proteins. Essential for neurotransmission and binds syntaxin, a component of the synaptic vesicle fusion machinery probably in a 1:1 ratio. Can interact with syntaxins 1, 2, and 3 but not syntaxin 4. May play a role in determining the specificity of intracellular fusion reactions. Two splice-variant isoforms have been described. Note: This description may include information from UniProtKB.
Protein type: Vesicle protein
Cellular Component: protein complex; mitochondrion; cytoplasm; plasma membrane; cytosol
Molecular Function: identical protein binding; protein domain specific binding; SNARE binding; syntaxin binding; syntaxin-1 binding; protein N-terminus binding; protein kinase binding
Biological Process: protein stabilization; synaptic vesicle maturation; neurotransmitter secretion; positive regulation of calcium ion-dependent exocytosis; synaptic transmission; protein transport; platelet degranulation; axon target recognition; glutamate secretion; energy reserve metabolic process; neuromuscular synaptic transmission; negative regulation of neuron apoptosis; negative regulation of synaptic transmission, GABAergic; regulation of insulin secretion; vesicle docking during exocytosis
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.