Isobutyryl-CoA mutase
class of enzymes
In enzymology, an isobutyryl-CoA mutase (EC 5.4.99.13) is an enzyme that catalyzes the chemical reaction
2-methylpropanoyl-CoA
⇌
{\displaystyle \rightleftharpoons }
butanoyl-CoA
Hence, this enzyme has one substrate, 2-methylpropanoyl-CoA, and one product, butanoyl-CoA.
This enzyme belongs to the family of isomerases, specifically those intramolecular transferases transferring other groups. The systematic name of this enzyme class is 2-methylpropanoyl-CoA CoA-carbonylmutase. Other names in common use include isobutyryl coenzyme A mutase, and butyryl-CoA:isobutyryl-CoA mutase. It uses adenosylcobalamin as a cofactor, which is bound at the enzyme's vitamin B12-binding domain. The mechanism of action of the enzyme is to generate a 5′-deoxyadenosyl radical by homolytic cleavage of the cobalt-carbon bond of the cofactor. This radical abstracts a hydrogen atom from the substrate to initiate the rearrangement reaction.
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This entry incorporates text from “Isobutyryl-CoA mutase” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.