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1iun

From Proteopedia

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{{STRUCTURE_1iun| PDB=1iun | SCENE= }}
{{STRUCTURE_1iun| PDB=1iun | SCENE= }}
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'''meta-Cleavage product hydrolase from Pseudomonas fluorescens IP01 (CumD) S103A mutant hexagonal'''
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===meta-Cleavage product hydrolase from Pseudomonas fluorescens IP01 (CumD) S103A mutant hexagonal===
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==Overview==
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2-Hydroxy-6-oxo-7-methylocta-2,4-dienoate hydrolase (CumD) from Pseudomonas fluorescens IP01 hydrolyzes a meta-cleavage product generated in the cumene (isopropylbenzene) degradation pathway. The crystal structures of the inactive S103A mutant of the CumD enzyme complexed with isobutyrate and acetate ions were determined at 1.6 and 2.0 A resolution, respectively. The isobutyrate and acetate ions were located at the same position in the active site, and occupied the site for a part of the hydrolysis product with CumD, which has the key determinant group for the substrate specificity of related hydrolases. One of the oxygen atoms of the carboxyl group of the isobutyrate ion was hydrogen bonded with a water molecule and His252. Another oxygen atom of the carboxyl group was situated in an oxyanion hole formed by the two main-chain N atoms. The isopropyl group of the isobutyric acid was recognized by the side-chains of the hydrophobic residues. The substrate-binding pocket of CumD was long, and the inhibition constants of various organic acids corresponded well to it. In comparison with the structure of BphD from Rhodococcus sp. RHA1, the structural basis for the substrate specificity of related hydrolases, is revealed.
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{{ABSTRACT_PUBMED_12192074}}
==About this Structure==
==About this Structure==
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[[Category: Pseudomonas fluorescens ip01]]
[[Category: Pseudomonas fluorescens ip01]]
[[Category: Substrate specificity]]
[[Category: Substrate specificity]]
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Revision as of 11:01, 1 July 2008

Image:1iun.png

Template:STRUCTURE 1iun

meta-Cleavage product hydrolase from Pseudomonas fluorescens IP01 (CumD) S103A mutant hexagonal

Template:ABSTRACT PUBMED 12192074

About this Structure

1IUN is a Single protein structure of sequence from Pseudomonas fluorescens. Full crystallographic information is available from OCA.

Reference

Crystal structures of a meta-cleavage product hydrolase from Pseudomonas fluorescens IP01 (CumD) complexed with cleavage products., Fushinobu S, Saku T, Hidaka M, Jun SY, Nojiri H, Yamane H, Shoun H, Omori T, Wakagi T, Protein Sci. 2002 Sep;11(9):2184-95. PMID:12192074

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