Comparison of the azoreductase and nitroreductase from Clostridium perfringens

Article Abstract:

The azoreductase and nitroreductase activities are due to the same enzyme in clostridium perfringens. The azo dyes and nitroaromatic compounds can act as electron acceptors for the same enzyme from C. perfringens. The purified azoreductase and nitroreductase of Clostridium perfringens have similar electrophoretic properties. The same protein is involved in the reduction of both azo dyes and nitroaromatic compounds.

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Regulation and characterization of two nitroreductase genes, nprA and nprB, of Rhodobacter capsulatus

Article Abstract:

The identification, isolation and characterization of the nitroreductase genes, nprA and nprB, involved in 2,4-dinitrophenol reduction in the phototrophic bacterium Rhodobacter capsulatus B10 are described. The induction of the nprA gene by paraquat and by an oxidized redox status in the cell indicates that the SoxRS system can also be implicated in controlling nprA gene expression.

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Sporulation-promoting ability of Clostridium perfringens culture fluids

Article Abstract:

The vegetative and sporulating culture supernatant fluids (CSFs) of Clostridium perfringens strains stimulate sporulation. Both the enterotoxin-positive (Ent+) and Ent- cells have the ability to stimulate sporulation. The effect is dependent on the concentration of the CFSs. The molecular weight of the sporulation factor, which is heat and acid resistant, is between 1,000 and 5,000.

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