Initial Transformations in the Biodegradation of Benzothiazoles by Rhodococcus Isolates

Author:

De Wever Helene12,Vereecken Karen1,Stolz Andreas2,Verachtert Hubert1

Affiliation:

1. Laboratory for Industrial Microbiology and Biochemistry, Katholieke Universiteit Leuven, 3001 Heverlee, Belgium,1 and

2. Institut für Mikrobiologie, Universität Stuttgart, 70569 Stuttgart, Germany2

Abstract

ABSTRACT Benzothiazole-2-sulfonate (BTSO 3 ) is one of the side products occurring in 2-mercaptobenzothiazole (MBT) production wastewater. We are the first to isolate an axenic culture capable of BTSO 3 degradation. The isolate was identified as a Rhodococcus erythropolis strain and also degraded 2-hydroxybenzothiazole (OBT) and benzothiazole (BT), but not MBT, which was found to inhibit the biodegradation of OBT, BT, and BTSO 3 . In anaerobic resting cell assays, BTSO 3 was transformed into OBT in stoichiometric amounts. Under aerobic conditions, OBT was observed as an intermediate in BT breakdown and an unknown compound transiently accumulated in several assays. This product was identified as a dihydroxybenzothiazole. Benzothiazole degradation pathways seem to converge into OBT, which is then transformed further into the dihydroxy derivative.

Publisher

American Society for Microbiology

Subject

Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology

Reference16 articles.

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