Sequencing and functional analysis of styrene catabolism genes from Pseudomonas fluorescens ST.

Applied and Environmental Microbiology
F BeltramettiE Zennaro

Abstract

The nucleotide sequence of the 4,377-bp chromosomal region of Pseudomonas fluorescens ST that codes for the oxidation of styrene to phenylacetic acid was determined. Four open reading frames, named styA, styB, styC, and styD, were identified in this region. Sequence analysis and biotransformation assays, performed with batch and continuous cultures, allowed us to identify the functions of the sequenced genes. styA and styB encode a styrene monooxygenase responsible for the transformation of styrene to epoxystyrene; styC codes for the second enzyme of the pathway, an epoxystyrene isomerase that converts epoxystyrene to phenylacetaldehyde; and the styD gene produces a phenylacetaldehyde dehydrogenase that oxidizes phenylacetaldehyde to phenylacetic acid. StyA, 415-amino-acids long, was found to be weakly homologous to p-hydroxybenzoate hydroxylase from both P. fluorescens and P. aeruginosa and to salicylate hydroxylase from P. putida, suggesting that it might be a flavin adenine dinucleotide-binding monooxygenase. StyB was found to be partially homologous to the carboxyterminal part of the 2,4-dichlorophenol-6-monooxygenase encoded by plasmid pJP4, while the styC product did not share significant homology with any known proteins....Continue Reading

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Citations

Aug 3, 2010·Journal of Bacteriology·Dirk TischlerMichael Schlömann
Sep 5, 2014·Microbiology·Michel OelschlägelDirk Tischler
Apr 16, 2020·Frontiers in Microbiology·María José Cárdenas EspinosaChristian Eberlein
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