PMID: 9753330 , Related PDB id: 1BR0

Authors:

Fernandez I, Ubach J, Dulubova I, Zhang X, Sudhof TC, Rizo J

Title:

Three-dimensional structure of an evolutionarily conserved N-terminal domain of syntaxin 1A.

Journal:

Cell. 1998 Sep 18;94(6):841-9.

Abstract:

Syntaxin 1A plays a central role in neurotransmitter release through multiple protein-protein interactions. We have used NMR spectroscopy to identify an autonomously folded N-terminal domain in syntaxin 1A and to elucidate its three-dimensional structure. This 120-residue N-terminal domain is conserved in plasma membrane syntaxins but not in other syntaxins, indicating a specific role in exocytosis. The domain contains three long alpha helices that form an up-and-down bundle with a left-handed twist. A striking residue conservation is observed throughout a long groove that is likely to provide a specific surface for protein-protein interactions. A highly acidic region binds to the C2A domain of synaptotagmin I in a Ca2+-dependent interaction that may serve as an electrostatic switch in neurotransmitter release.