title: Homology between hydroxybutyryl and hydroxyacyl coenzyme A dehydrogenase enzymes from Clostridium acetobutylicum fermentation and vertebrate fatty acid beta-oxidation pathways.
abstract: The enzymes NAD-dependent beta-hydroxybutyryl coenzyme A dehydrogenase (BHBD) and 3-hydroxyacetyl coenzyme A (3-hydroxyacyl-CoA) dehydrogenase are part of the central fermentation pathways for butyrate and butanol production in the gram-positive anaerobic bacterium Clostridium acetobutylicum and for the beta oxidation of fatty acids in eucaryotes, respectively. The C. acetobutylicum hbd gene encoding a bacterial BHBD was cloned, expressed, and sequenced in Escherichia coli. The deduced primary amino acid sequence of the C. acetobutylicum BHBD showed 45.9% similarity with the equivalent mitochondrial fatty acid beta-oxidation enzyme and 38.4% similarity with the 3-hydroxyacyl-CoA dehydrogenase part of the bifunctional enoyl-CoA hydratase:3-hydroxyacyl-CoA dehydrogenase from rat peroxisomes. The pig mitochondrial 3-hydroxyacyl-CoA dehydrogenase showed 31.7% similarity with the 3-hydroxyacyl-CoA dehydrogenase part of the bifunctional enzyme from rat peroxisomes. The phylogenetic relationship between these enzymes supports a common evolutionary origin for the fatty acid beta-oxidation pathways of vertebrate mitochondria and peroxisomes and the bacterial fermentation pathway.
authors.affiliation: Department of Microbiology, University of Cape Town, South Africa.
authors.forename: J S
authors.initials: JS
authors.lastname: Youngleson
authors.forename: D T
authors.initials: DT
authors.lastname: Jones
authors.forename: D R
authors.initials: DR
authors.lastname: Woods
mesh_terms: D015094:3-Hydroxyacyl CoA Dehydrogenases / Q000235:genetics* / Q000378:metabolism; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003013:Clostridium / Q000201:enzymology / Q000235:genetics*; D003062:Codon / Q000235:genetics; D004926:Escherichia coli / Q000235:genetics; D005227:Fatty Acids / Q000378:metabolism; D005285:Fermentation; D005796:Genes; D005798:Genes, Bacterial; D008969:Molecular Sequence Data; D010084:Oxidation-Reduction; D010957:Plasmids; D011817:Rabbits; D051381:Rats; D015183:Restriction Mapping; D012689:Sequence Homology, Nucleic Acid
chemical_list: D003062:Codon; D005227:Fatty Acids; D015094:3-Hydroxyacyl CoA Dehydrogenases; C021388:3-hydroxybutyryl-CoA dehydrogenase