2olo

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Revision as of 10:03, 23 January 2008

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spinqualitylabelsall models 2olo, resolution 1.900Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image

NikD, an unusual amino acid oxidase essential for nikkomycin biosynthesis: open form at 1.9A resolution

Overview

NikD is an unusual amino-acid-oxidizing enzyme that contains covalently, bound FAD, catalyzes a 4-electron oxidation of piperideine-2-carboxylic, acid to picolinate, and plays a critical role in the biosynthesis of, nikkomycin antibiotics. Crystal structures of closed and open forms of, nikD, a two-domain enzyme, have been determined to resolutions of 1.15 and, 1.9 A, respectively. The two forms differ by an 11 degrees rotation of the, catalytic domain with respect to the FAD-binding domain. The active site, is inaccessible to solvent in the closed form; an endogenous ligand, believed to be picolinate, is bound close to and parallel with the flavin, ring, an orientation compatible with redox catalysis. The active site is, solvent accessible in the open form, but the picolinate ligand is, approximately perpendicular to the flavin ring and a tryptophan is stacked, above the flavin ring. NikD also contains a mobile cation binding loop.

About this Structure

2OLO is a Single protein structure of sequence from Streptomyces tendae with , and as ligands. Full crystallographic information is available from OCA.

Reference

NikD, an unusual amino acid oxidase essential for nikkomycin biosynthesis: structures of closed and open forms at 1.15 and 1.90 A resolution., Carrell CJ, Bruckner RC, Venci D, Zhao G, Jorns MS, Mathews FS, Structure. 2007 Aug;15(8):928-41. PMID:17697998

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