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Antonie Van Leeuwenhoek. 1995 Oct;68(3):203-8.

Hexavalent-chromium reduction by a chromate-resistant Bacillus sp. strain.

Author information

1
Instituto de Investigaciones Quimico-Biologicas, Universidad Michoacana, Morelia, Mexico.

Abstract

Bacillus strain QC1-2, isolated from a chromium-polluted zone, was selected by its high ability to both tolerate and reduce hexavalent chromium [Cr(VI)] to less-toxic trivalent chromium [Cr(III)]. Cell suspensions of strain QC1-2 rapidly reduced Cr(VI), in both aerobic and anaerobic conditions, to Cr(III) which remained in the supernatant. Cr(VI) reduction was dependent on the addition of glucose but sulfate, an inhibitor of chromate transport, had no effect. Studies with permeabilized cells and cell extracts showed that the Cr(VI) reductase of strain QC1-2 is a soluble NADH-dependent enzyme.

PMID:
8572677
DOI:
10.1007/bf00871816
[Indexed for MEDLINE]

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