| Literature DB >> 9473051 |
Abstract
trans-2'-Carboxybenzalpyruvate hydratase-aldolase was purified from a phenanthrene-degrading bacterium, Nocardioides sp. strain KP7, and characterized. The purified enzyme was found to have molecular masses of 38 kDa by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and 113 kDa by gel filtration chromatography. Thus, the homotrimer of the 38-kDa subunit constituted an active enzyme. The Km and kcat values of this enzyme for trans-2'-carboxybenzalpyruvate were 50 microM and 13 s(-1), respectively. trans-2'-Carboxybenzalpyruvate was transformed to 2-carboxybenzaldehyde and pyruvate by the action of this enzyme. The structural gene for this enzyme was cloned and sequenced; the length of this gene was 996 bp. The deduced amino acid sequence of this enzyme exhibited homology to those of trans-2'-hydroxybenzalpyruvate hydratase-aldolases from Pseudomonas putida PpG7 and Pseudomonas sp. strain C18.Entities:
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Year: 1998 PMID: 9473051 PMCID: PMC106976
Source DB: PubMed Journal: J Bacteriol ISSN: 0021-9193 Impact factor: 3.490