1wql

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Revision as of 22:25, 24 November 2007

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spinqualitylabelsall models 1wql, resolution 2.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image

Cumene dioxygenase (cumA1A2) from Pseudomonas fluorescens IP01

Overview

The crystal structure of the terminal component of the cumene dioxygenase, multicomponent enzyme system of Pseudomonas fluorescens IP01 (CumDO) was, determined at a resolution of 2.2 A by means of molecular replacement by, using the crystal structure of the terminal oxygenase component of, naphthalene dioxygenase from Pseudomonas sp. strain NCIB 9816-4 (NphDO)., The ligation of the two catalytic centers of CumDO (i.e., the nonheme iron, and Rieske [2Fe-2S] centers) and the bridging between them in neighboring, catalytic subunits by hydrogen bonds through a single amino acid residue, Asp231, are similar to those of NphDO. An unidentified external ligand, possibly dioxygen, was bound at the active site nonheme iron. The entrance, to the active site of CumDO is different from the entrance to the active, site of NphDO, as the two loops forming the lid exhibit great deviation., On the basis of the complex structure of NphDO, a biphenyl substrate was, modeled in the substrate-binding pocket of CumDO. The residues surrounding, the modeled biphenyl molecule include residues that have already been, shown to be important for its substrate specificity by a number of, engineering studies of biphenyl dioxygenases.

About this Structure

1WQL is a Protein complex structure of sequences from Pseudomonas fluorescens with FE2, FES and OXY as ligands. Full crystallographic information is available from OCA.

Reference

Crystal structure of the terminal oxygenase component of cumene dioxygenase from Pseudomonas fluorescens IP01., Dong X, Fushinobu S, Fukuda E, Terada T, Nakamura S, Shimizu K, Nojiri H, Omori T, Shoun H, Wakagi T, J Bacteriol. 2005 Apr;187(7):2483-90. PMID:15774891

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