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. 1992 Apr;174(8):2612-9.
doi: 10.1128/jb.174.8.2612-2619.1992.

Cloning and partial sequencing of an operon encoding two Pseudomonas putida haloalkanoate dehalogenases of opposite stereospecificity

P T Barth  1 , L Bolton, J C Thomson
Affiliations

Cloning and partial sequencing of an operon encoding two Pseudomonas putida haloalkanoate dehalogenases of opposite stereospecificity

P T Barth et al. J Bacteriol. 1992 Apr.

Abstract

We have cloned fragments of DNA (up to 13 kb), from Pseudomonas putida AJ1, that code for two stereospecific haloalkanoate dehalogenases. These enzymes are highly specific for D and L substrates. The two genes, designated hadD and hadL, have been isolated and independently expressed in Escherichia coli and P. putida hosts by using broad-host-range vectors. They are closely adjacent and inducible in what appears to be an operon with an upstream open reading frame of unknown function. Nucleotide sequence determination of hadD predicts a mature, cytoplasmic protein of 300 amino acid residues (molecular weight of 33,601). This has no significant homology with the L-specific haloalkanoate dehalogenases from Pseudomonas sp. strain CBS3 (B. Schneider, R. Muller, R. Frank, and F. Lingens, J. Bacteriol. 173:1530-1535, 1991) nor with any other known DNA or protein sequences.

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