2npx
NADH BINDING SITE AND CATALYSIS OF NADH PEROXIDASE
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OverviewOverview
The structure of the complex between cofactor NADH and the enzyme NADH peroxidase from Streptococcus faecalis 10C1 (Enterococcus faecalis) has been determined by crystal soaking, X-ray data collection, model building of NADH and refinement at 0.24-nm resolution based on the known enzyme structure [Stehle, T., Ahmed, S. A., Claiborne, A. & Schulz, G. E. (1991) J. Mol. Biol. 221, 1325-1344]. Apart from NADH, the catalytic center of the enzyme contains FAD and a cysteine that shuttles between thiolate and sulfenic acid states. Unfortunately, this cysteine was irreversibly oxidized to a cysteine sulfonic acid in the established enzyme structure. Based on the geometry of the catalytic center, we discuss the stabilization of the oxidation-sensitive sulfenic acid and propose a reaction mechanism.
About this StructureAbout this Structure
2NPX is a Single protein structure of sequence from Enterococcus faecalis with , and as ligands. Active as NADH peroxidase, with EC number 1.11.1.1 Full crystallographic information is available from OCA.
ReferenceReference
NADH binding site and catalysis of NADH peroxidase., Stehle T, Claiborne A, Schulz GE, Eur J Biochem. 1993 Jan 15;211(1-2):221-6. PMID:8425532
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