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Journal of Bacteriology logoLink to Journal of Bacteriology
. 1994 Oct;176(20):6188–6191. doi: 10.1128/jb.176.20.6188-6191.1994

Identification and sequence analysis of the soxB gene essential for sulfur oxidation of Paracoccus denitrificans GB17.

C Wodara 1, S Kostka 1, M Egert 1, D P Kelly 1, C G Friedrich 1
PMCID: PMC196957  PMID: 7928987

Abstract

The coding region for lithotrophic sulfur oxidation (Sox) in Paracoccus denitrificans GB17 was identified by isolation of a transposon Tn5-mob mutant with a Sox- phenotype (strain TP19). The corresponding wild-type region was cloned previously (G. Mittenhuber, K. Sonomoto, M. Egert, and C. G. Friedrich, J. Bacteriol. 173:7340-7344, 1991). Sequence analysis of a 2.5-kb subclone that complemented strain TP19 revealed that Tn5-mob was inserted into a coding region for a 553-amino-acid polypeptide named SoxB. This polypeptide had an M(r) of 60.573, including a possible signal peptide. The function of the SoxB protein of P. denitrificans GB17 appeared to be identical to that of enzyme B of the thiosulfate-oxidizing enzyme system of Thiobacillus versutus. The amino acid compositions of the two proteins were identical, and the amino acid sequences of three internal peptides of enzyme B as determined by Edman degradation were identical to corresponding sequences of the deduced SoxB protein of P. denitrificans GB17.

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Selected References

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