2-aminophenol 1,6-dioxygenase subunit beta

UniProtKB accession:  Q6J1Z6

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UniProtKB description:  Component of the 2-aminophenol 1,6-dioxygenase (APD) complex that catalyzes the ring fission of 2-aminophenol to produce 2-aminomuconic semialdehyde. CnbCb seems to be the catalytic subunit of the complex. Also active on other substrates such as 2-amino-5-chlorophenol (68% activity), protocatechuate (33% activity) and catechol (5% activity). Both 2-aminophenol and 2-amino-5-cholorophenol are likely native substrates for this dioxygenase which is involved in the reductive degradation pathway of both nitrobenzene (NB) and 4-chloronitrobenzene (4-CNB), allowing C.testosteroni strain CNB-1 to grow on these compounds as sole source of carbon, nitrogen, and energy.