Structure and Function
SNAP-25 is a membrane bound protein anchored to the cytosolic face of membranes via palmitoyl side chains in the middle of the molecule. SNAP-25 is a Q-SNARE protein contributing two α-helices in the formation of the exocytotic fusion complex in neurons where it assembles with syntaxin-1 and synaptobrevin. SNAP-25 inhibits P/Q- and L-type voltage-gated calcium channels located presynaptically and interacts with the synaptotagmin C2B domain in Ca2+-independent fashion. In glutamatergic synapses SNAP-25 decreases the Ca2+ responsiveness, while it is naturally absent in GABAergic synapses.
| SNAP-25 family |
Structure of a SNARE complex involved in synaptic exocytosis. |
| Identifiers |
| Symbol |
SNAP-25 |
| Pfam |
PF00835 |
| InterPro |
IPR000928 |
| SCOP |
1sfc |
| SUPERFAMILY |
1sfc |
| Available protein structures: |
| Pfam |
structures |
| PDB |
RCSB PDB; PDBe |
| PDBsum |
structure summary |
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Read more about this topic: SNAP25
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