Part of the multicomponent anthranilate dioxygenase, that converts anthranilate to catechol. This protein seems to be a 2Fe-2S ferredoxin. Binds 1 [2Fe-2S] cluster per subunit. Aromatic compound metabolism; anthranilate degradation via hydroxylation; catechol from anthranilate: step 1/1. Part of a multicomponent enzyme system composed of a reductase (AndAa), a ferredoxin (AndAb) and a two-subunit oxygenase component (AndAc and AndAd). Expression is positively regulated by the transcriptional regulator AndR. Belongs to the bacterial ring-hydroxylating dioxygenase ferredoxin component family.