Download MendeleyThree-dimensional structure of an evolutionarily conserved N-terminal domain of syntaxin 1A.
Fernandez, I., Ubach, J., Dulubova, I., Zhang, X., Sudhof, T.C., Rizo, J.(1998) Cell 94: 841-849
- PubMed: 9753330
- DOI: https://doi.org/10.1016/s0092-8674(00)81742-0
- Primary Citation of Related Structures:
1BR0 - PubMed 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.
Organizational Affiliation:
Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas 75235, USA.
