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A new class EC 7, Translocases, has been added to the EC list. It will be part of ENZYME from release 2018_10. Read more about EC 7 here.

ENZYME entry: EC 2.1.1.342

Accepted Name
Anaerobilin synthase.
Reaction catalysed
2 S-adenosyl-L-methionine + protoheme + 2 reduced flavodoxin <=> S-adenosyl-L-homocysteine + L-methionine + 5'-deoxyadenosine + anaerobilin + Fe(2+) + 2 oxidized flavodoxin
Comment(s)
  • The enzyme, studied from the bacterium Escherichia coli O157:H7, is a radical SAM (AdoMet) enzyme that is involved in heme degradation and iron utilization under anaerobic conditions.
  • The enzyme uses two SAM molecules for the reaction.
  • The first molecule is used to generate a 5'-deoxyadenosyl radical, which abstracts a hydrogen atom from the methyl group of the second SAM molecule.
  • The newly formed methylene radical attacks the substrate, causing a rearrangement of the porphyrin ring that results in the liberation of iron.
Cross-references
BRENDA2.1.1.342
EC2PDB2.1.1.342
ExplorEnz2.1.1.342
PRIAM enzyme-specific profiles2.1.1.342
KEGG Ligand Database for Enzyme Nomenclature2.1.1.342
IUBMB Enzyme Nomenclature2.1.1.342
IntEnz2.1.1.342
MEDLINEFind literature relating to 2.1.1.342
MetaCyc2.1.1.342
UniProtKB/Swiss-Prot
A0A384LP51, CHUW_ECO57

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