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ligI | 2-pyrone-4,6-dicarboxylic acid hydrolase; Contributes to the degradation of lignin at the level of the protocatechuate 4,5-cleavage pathway. Catalyzes the hydrolysis of 2-pyrone-4,6-dicarboxylate (PDC) to (4E)-oxalomesaconate (OMA). The keto form of OMA can tautomerize into the enol form, 4-carboxy-2-hydroxymuconate (CHM), under certain pH conditions. Also catalyzes the reverse reaction. Is essential for the growth of Sphingobium sp. SYK-6 on vanillate but is not responsible for the growth of this strain on syringate. Belongs to the metallo-dependent hydrolases superfamily. PDC hydrola [...] (293 aa) | ||||
ligJ | 4-oxalomesaconate hydratase; Contributes to the degradation of lignin at the level of the protocatechuate 4,5-cleavage pathway. Catalyzes the hydration of the double bond of (3Z)-2-keto-4-carboxy-3-hexenedioate (KCH) to (4S)-4- carboxy-4-hydroxy-2-oxoadipate (CHA, also named (2S)-2-hydroxy-4- oxobutane-1,2,4-tricarboxylate). Is involved in the catabolism of both vanillate and syringate. (341 aa) |