ID   1.13.11.3
DE   protocatechuate 3,4-dioxygenase.
AN   protocatechuate oxygenase.
CA   3,4-dihydroxybenzoate + O2 = 3-carboxy-cis,cis-muconate + 2 H(+).
CC   -!- The enzyme, which participates in the degradation of aromatic
CC       compounds, catalyzes the intradiol addition of both oxygen atoms from
CC       molecular oxygen, resulting in ortho-cleavage of the aromatic ring.
CC   -!- The type of cleavage leads to mineralization via the intermediate
CC       3-oxoadipate.
CC   -!- Formerly EC 1.13.1.3 and EC 1.99.2.3.
DR   P20371, PCXA_ACIAD ;  P15109, PCXA_BURCE ;  P00436, PCXA_PSEPU ;
DR   P20372, PCXB_ACIAD ;  P15110, PCXB_BURCE ;  P00437, PCXB_PSEPU ;
DR   A2R1P9, PRCA_ASPNC ;  Q5AT14, PRCA_EMENI ;
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