1gvg: Difference between revisions
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Revision as of 14:15, 5 November 2007
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CRYSTAL STRUCTURE OF CLAVAMINATE SYNTHASE WITH NITRIC OXIDE
Overview
Clavaminate synthase (CAS), a 2-oxoglutarate (2OG) dependent dioxygenase, catalyses three steps in the biosynthesis of clavulanic acid. Crystals of, CAS complexed with Fe(II), 2OG and deoxyguanidinoproclavaminate were, exposed to nitric oxide (NO) acting as a dioxygen analogue. Prior to, exposure with NO, the active site Fe(II) is octahedrally coordinated by a, water molecule, the 2-oxo and 1-carboxylate groups of 2OG, and the, side-chains of an aspartyl and two histidinyl residues. NO binds to the, position previously occupied by the 2OG 1-carboxylate concomitant with, rearrangement of the latter to the position previously occupied by the, displaced water.
About this Structure
1GVG is a Single protein structure of sequence from Streptomyces clavuligerus with FE, SO4, NO, AKG and PCX as ligands. Structure known Active Site: AC1. Full crystallographic information is available from OCA.
Reference
Crystal structure of a clavaminate synthase-Fe(II)-2-oxoglutarate-substrate-NO complex: evidence for metal centered rearrangements., Zhang Z, Ren J, Harlos K, McKinnon CH, Clifton IJ, Schofield CJ, FEBS Lett. 2002 Apr 24;517(1-3):7-12. PMID:12062399
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