PMID: 11474112 , Related PDB id: 1H8M

Authors:

Tochio H, Tsui MM, Banfield DK, Zhang M

Title:

An autoinhibitory mechanism for nonsyntaxin SNARE proteins revealed by the structure of Ykt6p.

Journal:

Science. 2001 Jul 27;293(5530):698-702.

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.