Deazaflavin-dependent nitroreductase

UniProtKB accession:  P9WP15

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UniProtKB description:  Involved in a F420-dependent anti-oxidant mechanism that protects M.tuberculosis against oxidative stress and bactericidal agents. Catalyzes the F420H(2)-dependent two-electron reduction of quinones to dihydroquinones, thereby preventing the formation of cytotoxic semiquinones obtained by the one-electron reduction pathway (PubMed:23240649). In vitro, catalyzes the reduction of both benzoquinone and naphthoquinone analogs; since menaquinone is the sole quinone electron carrier in the respiratory chain in M.tuberculosis, the physiological electron acceptor for Fqr-mediated F420H(2) oxidation is therefore likely to be the endogenous menaquinone found in the membrane fraction of M.tuberculosis (PubMed:23240649). Is able to use F420 species with two and five glutamate residues in its polyglutamate tail (PubMed:22023140). Cannot use NADH or NADPH instead of F420H(2) as the electron donor (PubMed:23240649).