propionyl-CoA carboxylase

propionyl-CoA carboxylase
pro·pi·o·nyl-CoA car·boxy·lase (proґpe-ə-nəl ko-aґ kahr-bokґsə-lās) [EC 6.4.1.3] an enzyme of the ligase class that catalyzes the carboxylation of propionyl CoA to form methylmalonyl CoA; the reaction is part of the route by which three-carbon compounds from some amino acids and from odd-numbered fatty acids are used as fuels. The enzyme is an oligomer comprising 4α and 4β chains and requires a biotin cofactor. Deficiency of enzyme activity due to a defect in either chain, an autosomal recessive trait, causes propionicacidemia; see also multiple carboxylase deficiency, under carboxylase.

Medical dictionary. 2011.

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