1.7.1.17 F117A the mutant shows 208% activity with Methyl Red and 176% activity with NADH compared to the wild type enzyme 765245 1.7.1.17 F161A inactive 765245 1.7.1.17 F162A site-directed mutagenesis 742834 1.7.1.17 G140F inactive 765245 1.7.1.17 G141F inactive 765245 1.7.1.17 H143A the mutant shows 19% activity with Methyl Red and 76% activity with NADH compared to the wild type enzyme 765245 1.7.1.17 additional information deletion of the azoR gene in Escherichia coli strain MG1655 has no strong influence on the 7NCCA reduction of the cells even though the pure enzyme displays a clear nitroreductase activity with this compound 743185 1.7.1.17 N121Q 115% of wild-type activity -, 744201 1.7.1.17 N96A the mutant shows 9% activity with Methyl Red and 37% activity with NADH compared to the wild type enzyme 765245 1.7.1.17 R139A the mutant shows 63% activity with Methyl Red and 78% activity with NADH compared to the wild type enzyme 765245 1.7.1.17 R21G/N121A 136% of wild-type activity -, 744201 1.7.1.17 R21G/N121Q 171% of wild-type activity -, 744201 1.7.1.17 R21K 80% of wild-type activity -, 744201 1.7.1.17 R21K/N121A 41% of wild-type activity -, 744201 1.7.1.17 R21K/N121Q 40% of wild-type activity 744201 1.7.1.17 R59A site-directed mutagenesis, the mutation enhances the Vmax value for p-methyl red 27fold with a 3.8fold increase of the Km value, residue Arg59 decides the substrate specificity of AzoR 742834 1.7.1.17 R59A the mutant shows 70% activity with Methyl Red and 83% activity with NADH compared to the wild type enzyme 765245 1.7.1.17 R59G mutation influences the formation of dilution-induced intermediates. Mutant R59G contains only two types of FMN, emitting at 530 nm and 600 nm 744730 1.7.1.17 S16A the mutant shows 29% activity with Methyl Red and 49% activity with NADH compared to the wild type enzyme 765245 1.7.1.17 W105A complete loss of both affinity for FMN and enzyme activity -, 745718 1.7.1.17 W105F 31fold decrease in vmax value, Km value similar to wild-type -, 745718 1.7.1.17 W105G complete loss of both affinity for FMN and enzyme activity 745718 1.7.1.17 W105H 8fold decrease in vmax value, Km value similar to wild-type -, 745718 1.7.1.17 W105Q 68fold decrease in vmax value, Km value similar to wild-type -, 745718 1.7.1.17 W105Y 22% reduction in vmax value -, 745718 1.7.1.17 W60D the mutant retains more than 10% of wild type activity -, 763801 1.7.1.17 Y119A the mutant shows 59% activity with Methyl Red and 44% activity with NADH compared to the wild type enzyme 765245 1.7.1.17 Y120A site-directed mutagenesis 742834 1.7.1.17 Y127F site-directed mutagenesis, Diffraction-quality crystals for the Y127F mutant cannot be obtained -, 763965 1.7.1.17 Y151F site-directed mutagenesis, structure comparison with the wild-type enzyme -, 763965