An autoinhibitory mechanism for nonsyntaxin SNARE proteins revealed by the structure of Ykt6pTochio, H., Tsui, M.M.K., Banfield, D.K., Zhang, M.
(2001) Science 293: 698-702
- PubMed: 11474112
- DOI: https://doi.org/10.1126/science.1062950
- Primary Citation of Related Structures:
- PubMed Abstract:
Ykt6p is a nonsyntaxin SNARE implicated in multiple intracellular membrane trafficking steps. Here we present the structure of the NH2-terminal domain of Ykt6p (Ykt6pN, residues 1 to 140). The structure of Ykt6pN differed entirely from that of syntaxin and resembled the overall fold of the actin regulatory protein, profilin. Like some syntaxins, Ykt6p adopted a folded back conformation in which Ykt6pN bound to its COOH-terminal core domain. The NH2-terminal domain plays an important biological role in the function of Ykt6p, which in vitro studies revealed to include influencing the kinetics and proper assembly of SNARE complexes.
Department of Biochemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, People's Republic of China.