title: Molecular cloning, cDNA structure and predicted amino acid sequence of bovine 3 beta-hydroxy-5-ene steroid dehydrogenase/delta 5-delta 4 isomerase.
abstract: We have used our recently characterized human 3 beta-hydroxy-5-ene steroid dehydrogenase/delta 5-delta 4-isomerase (3 beta-HSD) cDNA as probe to isolate cDNAs encoding bovine 3 beta-HSD from a bovine ovary lambda gtll cDNA library. Nucleotide sequence analysis of two overlapping cDNA clones of 1362 bp and 1536 bp in length predicts a protein of 372 amino acids with a calculated molecular mass of 42,093 (excluding the first Met). The deduced amino acid sequence of bovine 3 beta-HSD displays 79% homology with human 3 beta-HSD while the nucleotide sequence of the coding region shares 82% interspecies similarity. Hybridization of cloned cDNAs to bovine ovary poly(A)+ RNA shows the presence of an approximately 1.7 kb mRNA species.
authors.affiliation: Medical Research Council Group in Molecular Endocrinology, Laval University Medical Centre, Quebec, Canada.
authors.forename: H F
authors.initials: HF
authors.lastname: Zhao
authors.forename: J
authors.initials: J
authors.lastname: Simard
authors.forename: C
authors.initials: C
authors.lastname: Labrie
authors.forename: N
authors.initials: N
authors.lastname: Breton
authors.forename: E
authors.initials: E
authors.lastname: Rhéaume
authors.forename: V
authors.initials: V
authors.lastname: Luu-The
authors.forename: F
authors.initials: F
authors.lastname: Labrie
mesh_terms: D015096:3-Hydroxysteroid Dehydrogenases / Q000235:genetics*; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D015152:Blotting, Northern; D002417:Cattle; D003001:Cloning, Molecular; D004247:DNA / Q000235:genetics; D005260:Female; D006801:Humans; D007535:Isomerases / Q000235:genetics*; D008969:Molecular Sequence Data; D009097:Multienzyme Complexes / Q000235:genetics*; D010053:Ovary / Q000201:enzymology; D011375:Progesterone Reductase / Q000235:genetics*; D011487:Protein Conformation; D015183:Restriction Mapping; D012995:Solubility; D013251:Steroid Isomerases / Q000235:genetics*
chemical_list: C021425:3 beta-hydroxysteroid oxidoreductase-delta(5) 3-ketosteroid isomerase; D009097:Multienzyme Complexes; D004247:DNA; D015096:3-Hydroxysteroid Dehydrogenases; D011375:Progesterone Reductase; D007535:Isomerases; D013251:Steroid Isomerases; C022660:steroid delta-isomerase