J. Agric. Food Chem. 2009, 57, 10457–10465
10457
DOI:10.1021/jf9024135
Characterization of a Nitroreductase with Selective Nitroreduction Properties in the Food and Intestinal Lactic Acid Bacterium Lactobacillus plantarum WCFS1 HUGO GUILLEN, JOSE ANTONIO CURIEL, JOSE MARI´A LANDETE, ROSARIO MUN~ OZ, AND TOMAS HERRAIZ* Instituto de Fermentaciones Industriales, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
Nitroreductases reduce nitroaromatic compounds and other oxidants in living organisms, having interesting implications in environmental and human health. A putative nitrobenzoate reductase encoding gene (lp_0050) was recently annotated in the completed DNA sequence of lactic acid bacterium Lactobacillus plantarum WCFS1 strain. In this research, this L. plantarum gene was cloned and expressed, and the corresponding protein (PnbA) was biochemically characterized. This L. plantarum PnbA reductase is a 216 amino acid residue FMN-flavoprotein, which exhibits 23% identity with Pseudomonas putida and Ralstonia eutropha nitroreductases and
