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  • Title: Two mitochondrial 3-hydroxyacyl-CoA dehydrogenases in bovine liver.
    Author: Kobayashi A, Jiang LL, Hashimoto T.
    Journal: J Biochem; 1996 Apr; 119(4):775-82. PubMed ID: 8743581.
    Abstract:
    3-Hydroxyacyl-CoA dehydrogenase catalyzes the third reaction of fatty acid beta-oxidation spiral. There are three enzymes catalyzing the 3-hydroxyacyl-CoA dehydrogenase, mitochondrial enoyl-CoA hydratase/3-hydroxyacyl-CoA dehydrogenase/3-ketoacyl-CoA thiolase trifunctional protein, and peroxisomal enoyl-CoA hydratase/3-hydroxyacyl-CoA dehydrogenase CoA dehydrogenase was not known. In the present study, two monofunctional mitochondrial 3-hydroxyacyl-CoA dehydrogenases were purified from bovine liver. Type I enzyme was composed of two identical subunits with molecular mass of 35 kDa, and type II enzyme was a homotetramer of a 28 kDa polypeptide. In respect to the molecular structures, immunochemical properties, and carbon chain length specificities of acyl-CoA substrates, type I enzyme was the same as the well-known classical enzyme purified from various tissues, but type II enzyme was concluded to be a new enzyme. Type I enzyme was ubiquitous, but type II enzyme was rich in bovine and sheep, of several animal livers so far examined.
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