title: Isolation and characterization of several members of the murine Hsd3b gene family.
abstract: The enzyme 3 beta-hydroxysteroid dehydrogenase (3 betaHSD) is essential for all steroid hormone biosynthesis. Six distinct 3 betaHSD cDNAs in the mouse (3 betaHSD I-VI) have been isolated previously. This study reports the isolation of genes or partial genes encoding the 3 betaHSDI, II, III, and IV isoforms. Characterization of the genes revealed that they consist of four exons, the same structure that has been observed for characterized human 3 betaHSD genes. Primer extension and nuclease S1 analysis identified the start sites of transcription of Hsd3b -1 and -4. The proximal promoter regions of Hsd3b-1 and -4 were sequenced and putative cis-acting sequences were determined. Previously, we reported that the then known 3 betaHSD genes (3 betaHSD I-IV) were located in a small region of mouse chromosome 3. To analyze this locus further, six yeast artificial chromosome clones containing the 3 betaHSD sequence were identified. One clone appears to contain the complete 3 betaHSD locus within its 1,400-kbp insert. Further analysis of this YAC, along with analysis of mouse genomic DNA by pulsed-field gel electrophoresis, suggests all members of the 3 betaHSD gene family may be contained on a 400-kbp fragment.
authors.affiliation: Department of Biological Chemistry, University of Michigan, Ann Arbor 48109-0278, USA.
authors.forename: T R
authors.initials: TR
authors.lastname: Clarke
authors.forename: P A
authors.initials: PA
authors.lastname: Bain
authors.forename: M
authors.initials: M
authors.lastname: Burmeister
authors.forename: A H
authors.initials: AH
authors.lastname: Payne
mesh_terms: D015096:3-Hydroxysteroid Dehydrogenases / Q000235:genetics*; D000818:Animals; D001483:Base Sequence; D002874:Chromosome Mapping; D018244:Chromosomes, Artificial, Yeast / Q000235:genetics; D003001:Cloning, Molecular; D004247:DNA / Q000032:analysis; D005091:Exons / Q000235:genetics; D005260:Female; D005796:Genes / Q000235:genetics; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D008969:Molecular Sequence Data; D005810:Multigene Family / Q000235:genetics*; D009928:Organ Specificity; D011401:Promoter Regions, Genetic / Q000235:genetics; D012333:RNA, Messenger / Q000032:analysis / Q000235:genetics; D017422:Sequence Analysis, DNA; D014158:Transcription, Genetic / Q000235:genetics
chemical_list: D012333:RNA, Messenger; D004247:DNA; D015096:3-Hydroxysteroid Dehydrogenases