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EC 1.13.11.3 Details
EC number
1.13.11.3
Accepted name
protocatechuate 3,4-dioxygenase
Reaction
3,4-dihydroxybenzoate + O2 = 3-carboxy-cis,cis-muconate
Other name(s)
protocatechuate oxygenase, protocatechuic acid oxidase, protocatechuic 3,4-dioxygenase, protocatechuic 3,4-oxygenase, protocatechuate:oxygen 3,4-oxidoreductase (decyclizing)
Systematic name
protocatechuate:oxygen 3,4-oxidoreductase (ring-opening)
CAS registry number
9029-47-4
Comment
Requires Fe3+. The enzyme, which participates in the degradation of aromatic compounds, catalyses the intradiol addition of both oxygen atoms from molecular oxygen, resulting in ortho-cleavage of the aromatic ring. The type of cleavage leads to mineralization via the intermediate 3-oxoadipate.
History
created 1961 as EC 1.99.2.3, transferred 1965 to EC 1.13.1.3, transferred 1972 to EC 1.13.11.3
EC Tree
1.6.2.1 created 1961, deleted 1965
1.6.2.3 created 1972, deleted 1965
1.13.11.7 created 1965 as EC 1.13.1.7, transferred 1972 to EC 1.13.11.7, deleted 1980
1.13.11.21 created 1972, deleted 2001