Electron transfer component of anthranilate 1,2-dioxygenase system. H(+) + NAD(+) + 2 reduced [2Fe-2S]-[ferredoxin] = NADH + 2 oxidized [2Fe-2S]-[ferredoxin] Binds 1 [2Fe-2S] cluster per subunit. Aromatic compound metabolism; anthranilate degradation via hydroxylation; catechol from anthranilate: step 1/1. Monomer. It is part of the anthranilate dioxygenase two component enzyme system. The other component is an oxygenase component consisting of 3 large (AntA) and 3 small (AntB) subunits. Belongs to the bacterial ring-hydroxylating dioxygenase ferredoxin reductase family.