Structural Variation in Bacterial Glyoxalase I Enzymes

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Bacterial glyoxalase I enzymes: structural and biochemical investigations.

A number of bacterial glyoxalase I enzymes are maximally activated by Ni2+ and Co2+ ions, but are inactive in the presence of Zn2+, yet these enzymes will also bind this metal ion. The structure-activity relationships between these two classes of glyoxalase I serve as important clues as to how the molecular structures of these proteins control metal-activation profiles.

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Glyoxalase I (EC 4.4.1.5) is the best studied enzyme of the glyoxalase system [1,21. This enzyme catalyses the formation of (S) -Dlactoylglutathione from methylglyoxal and glutathione. Kinetic studies made with highly purified preparations of this enzyme suggest that it is a very efficient catalyst [3-51. A detailed knowledge concerning enzyme kinetics is is required if the study’s aim is metab...

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Human glyoxalase I. cDNA cloning, expression, and sequence similarity to glyoxalase I from Pseudomonas putida.

Glyoxalase I (EC 4.4.1.5) catalyzes the transformation of methylglyoxal and glutathione to S-lactoylglutathione. We have isolated human cDNA clones encoding glyoxalase I from a phorbol myristate acetate-treated U937 cDNA library. This cDNA encodes a protein of 184 amino acids with a calculated M(r) of 20,719. The amino acid composition calculated from the deduced amino acid sequence agreed with...

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ژورنال

عنوان ژورنال: Journal of Biological Chemistry

سال: 2011

ISSN: 0021-9258

DOI: 10.1074/jbc.m111.251603