Constitutive synthesis of enzymes involved in 2-aminophenol metabolism and inducible synthesis of enzymes involved in benzoate, p-hydroxybenzoate, and protocatechuate metabolism in Pseudomonas sp. strain AP-3.

Pseudomonas sp. strain AP-3 grows on benzoate, p-hydroxybenzoate, protocatechuate, and 2-aminophenol as sole carbon and energy source. This strain converted benzoate and p-hydroxybenzoate to catechol and protocatechuate respectively, which were metabolized via the ortho-cleavage pathway. The enzymes responsible for these reactions were shown to be inducible. In contrast, strain AP-3 constitutively expresses the enzymes involved in the metabolism of 2-aminophenol.