Cofactor |
COFACTOR: Name=Fe(2+); Xref=ChEBI:CHEBI:29033; Evidence={ECO:0000250, ECO:0000269|PubMed:16761197}; Name=Co(2+); Xref=ChEBI:CHEBI:48828; Evidence={ECO:0000250, ECO:0000269|PubMed:16761197}; Name=Ni(2+); Xref=ChEBI:CHEBI:49786; Evidence={ECO:0000250, ECO:0000269|PubMed:16761197}; Name=Mn(2+); Xref=ChEBI:CHEBI:29035; Evidence={ECO:0000250, ECO:0000269|PubMed:16761197}; Note=Binds 2 divalent metal cations per subunit. Has a high-affinity and a low affinity metal-binding site. The true nature of the physiological cofactor is under debate. Most likely, methionine aminopeptidases function as mononuclear Fe(2+)-metalloproteases under physiological conditions, and the catalytically relevant metal-binding site has been assigned to the histidine-containing high-affinity site. The enzyme is active with cobalt, nickel, manganese and divalent iron ions. {ECO:0000250, ECO:0000269|PubMed:16761197}; |