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. 1988 Dec;170(12):5956-9.
doi: 10.1128/jb.170.12.5956-5959.1988.

Reduction of Mo6+ with elemental sulfur by Thiobacillus ferrooxidans

T Sugio  1 , Y Tsujita, T Katagiri, K Inagaki, T Tano
Affiliations

Reduction of Mo6+ with elemental sulfur by Thiobacillus ferrooxidans

T Sugio et al. J Bacteriol. 1988 Dec.

Abstract

In the presence of phosphate ions, molybdic ions (Mo6+) were reduced enzymatically with elemental sulfur by washed intact cells of Thiobacillus ferrooxidans to give molybdenum blue. The whole-cell activity that reduced Mo6+ was totally due to cellular sulfur:ferric ion oxidoreductase (SFORase) (T. Sugio, W. Mizunashi, K. Inagaki, and T. Tano, J. Bacteriol. 169:4916-4922, 1987). The activity of M06+ reduction with elemental sulfur was competitively inhibited by Fe3+, Cu2+, and Co2+. The Michaelis constant of SFORase for Mo6+ was 7.6 mM, and the inhibition constants for Fe3+, Cu2+, and Co2+ were 0.084, 0.015, and 0.17 mM, respectively, suggesting that SFORase can reduce not only Fe3+ and Mo6+ but also Cu2+ and Co2+ with elemental sulfur.

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References

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    1. Appl Environ Microbiol. 1988 Jan;54(1):150-152 - PubMed
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