Stxbp1
Function
Participates in the regulation of synaptic vesicle docking and fusion through interaction with GTP-binding proteins (By similarity). 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. Involved in the release of neurotransmitters from neurons through interacting with SNARE complex component STX1A and mediating the assembly of the SNARE complex at synaptic membranes (PubMed:21445306, PubMed:28821673). May play a role in determining the specificity of intracellular fusion reactions (By similarity).
Sequence Similarities
Belongs to the STXBP/unc-18/SEC1 family.
Tissue Specificity
Expressed in the inner and outer plexiform layers of the retina (at protein level).
Cellular localization
- Cytoplasm
- Cytosol
- Membrane
- Peripheral membrane protein
Alternative names
Syntaxin-binding protein 1, Protein unc-18 homolog 1, Protein unc-18 homolog A, Unc18-1, Unc-18A, Stxbp1