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CarBa is the A subunit of 2-aminophenol 1,6-dioxygenase, which catalyzes the oxidization and subsequent ring-opening of 2-aminophenyl-2,3-diol. CarBa is the A subunit of 2-aminophenol 1,6-dioxygenase, which catalyzes the oxidization and subsequent ring-opening of 2-aminophenyl-2,3-diol. 2-aminophenol 1,6-dioxygenase is a key enzyme in the carbazole degradation pathway isolated from bacterial strains with carbazole degradation ability. The enzyme is a heterotetramer composed of two A and two B subunits. CarB belongs to the class III extradiol dioxygenase family, composed of enzymes which use a non-heme Fe(II) to cleave aromatic rings between a hydroxylated carbon and an adjacent non-hydroxylated carbon. Although the enzyme was originally isolated as a meta-cleavage enzyme for 2'-aminobiphenyl-2,3-diol involved in carbazole degradation, the enzyme has also shown high specificity for 2,3-dihydroxybiphenyl. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",