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Appl Environ Microbiol. 1992 March; 58(3): 911-915

Desulfurization of dibenzothiophene by Corynebacterium sp. strain SY1.

T Omori, L Monna, Y Saiki and T Kodama

Department of Agricultural Chemistry, Faculty of Agriculture, University of Tokyo, Japan.

ABSTRACT

Strain SY1, identified as a Corynebacterium sp., was isolated on the basis of the ability to utilize dibenzothiophene (DBT) as a sole source of sulfur. Strain SY1 could utilize a wide range of organic and inorganic sulfur compounds, such as DBT sulfone, dimethyl sulfide, dimethyl sulfoxide, dimethyl sulfone, CS2, FeS2, and even elemental sulfur. Strain SY1 metabolized DBT to dibenzothiophene-5-oxide, DBT sulfone, and 2-hydroxybiphenyl, which was subsequently nitrated to produce at least two different hydroxynitrobiphenyls during cultivation. These metabolites were separated by silica gel column chromatography and identified by nuclear magnetic resonance, UV, and mass spectral techniques. Resting cells of SY1 desulfurized toluenesulfonic acid and released sulfite anion. On the basis of these results, a new DBT degradation pathway is proposed.

Appl Environ Microbiol. 1992 March; 58(3): 911-915




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