Genomic organization of human fetal specific P-450IIIA7 (cytochrome P-450HFLa)-related gene(s) and interaction of transcriptional regulatory factor with its DNA element in the 5' flanking region

Biochim Biophys Acta. 1992 Mar 24;1130(2):133-8. doi: 10.1016/0167-4781(92)90520-a.


P-450IIIA7 is a form of cytochrome P-450 which was isolated from human fetal livers and termed P-450HFLa. This form has been clarified to be expressed during fetal life specifically (Komori, M., Nishio, K., Kitada, M., Shiramatsu, K., Muroya, K., Soma, M., Nagashima, K. and Kamataki, T. (1990) Biochemistry 29, 4430-4433). In the present study, we isolated five independent clones which probably corresponded to the human P-450IIIA7 gene. These clones were completely sequenced, all exons, exon-intron junctions and the 5' flanking region from the cap site to-869. Although the sequences in the coding region were completely identical to P-450IIIA7, it is possible that genomic fragments sequenced in this study encode portions of other P-450IIIA7-related genes since we could not obtain a complete overlapping set of genomic clones. Within its 5' flanking sequence, the putative binding sites of several transcriptional regulatory factors existed. Among them, it was shown that a basic transcription element binding factor (BTEB) actually interacted with the 5' flanking region of this gene.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Animals
  • Aryl Hydrocarbon Hydroxylases*
  • Base Sequence
  • Cells, Cultured
  • Cytochrome P-450 CYP3A
  • Cytochrome P-450 Enzyme System / genetics*
  • DNA / metabolism*
  • Electrophoresis, Polyacrylamide Gel
  • Exons
  • Gene Expression Regulation, Enzymologic*
  • Humans
  • Introns
  • Liver / embryology
  • Liver / enzymology
  • Mice
  • Molecular Sequence Data
  • Promoter Regions, Genetic
  • RNA, Messenger / genetics
  • Restriction Mapping
  • Sequence Homology, Nucleic Acid
  • Transcription, Genetic


  • RNA, Messenger
  • DNA
  • Cytochrome P-450 Enzyme System
  • Aryl Hydrocarbon Hydroxylases
  • CYP3A7 protein, human
  • Cytochrome P-450 CYP3A