1hsr

From Proteopedia

Revision as of 14:33, 5 November 2007

BINDING MODE OF BENZHYDROXAMIC ACID TO ARTHROMYCES RAMOSUS PEROXIDASE

Overview

The crystal structure of Arthromyces ramosus peroxidase (ARP) in complex, with benzhydroxamic acid (BHA) as determined by X-ray analysis at 1.6 A, shows unambiguously how BHA binds to ARP. BHA is located in the distal, heme pocket. Its functional groups are held by three hydrogen bonds to, His56N(epsilon), Arg52N(epsilon), and Pro(154)O, but are too far away to, interact with the heme iron. The aromatic ring of BHA is positioned at the, entrance of the channel to the heme pocket, approximately parallel to the, heme group. Most water molecules at the active site of the native enzyme, are replaced by BHA, leaving a ligand, probably a water molecule, at the, sixth position of the heme. Results are compared with spectroscopic data.

About this Structure

1HSR is a Single protein structure of sequence from Eukaryota with CA, HEM and BHO as ligands. Active as Peroxidase, with EC number 1.11.1.7 Structure known Active Sites: CA1, CA2 and GL1. Full crystallographic information is available from OCA.

Reference

Binding mode of benzhydroxamic acid to Arthromyces ramosus peroxidase shown by X-ray crystallographic analysis of the complex at 1.6 A resolution., Itakura H, Oda Y, Fukuyama K, FEBS Lett. 1997 Jul 21;412(1):107-10. PMID:9257700

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