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Comparative Study
. 1989 Sep;171(9):4871-5.
doi: 10.1128/jb.171.9.4871-4875.1989.

Cloning, nucleotide sequence, and expression in Escherichia coli of the Bacillus stearothermophilus peroxidase gene (perA)

S Loprasert  1 , S Negoro, H Okada
Affiliations
Comparative Study

Cloning, nucleotide sequence, and expression in Escherichia coli of the Bacillus stearothermophilus peroxidase gene (perA)

S Loprasert et al. J Bacteriol. 1989 Sep.

Abstract

The gene encoding a thermostable peroxidase was cloned from the chromosomal DNA of Bacillus stearothermophilus IAM11001 in Escherichia coli. The nucleotide sequence of the 3.1-kilobase EcoRI fragment containing the peroxidase gene (perA) and its flanking region was determined. A 2,193-base-pair open reading frame encoding a peroxidase of 731 amino acid residues (Mr, 82,963) was observed. A Shine-Dalgarno sequence was found 9 base pairs upstream from the translational starting site. The deduced amino acid sequence coincides with those of the amino terminus and four peptides derived from the purified peroxidase of B. stearothermophilus IAM11001. E. coli harboring a recombinant plasmid containing perA produced a large amount of thermostable peroxidase which comigrated on polyacrylamide gel electrophoresis with the B. stearothermophilus peroxidase. The peroxidase of B. stearothermophilus showed 48% homology in the amino acid sequence to the catalase-peroxidase of E. coli.

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