Structure and drug inducibility of the human cytochrome P‐450c gene

Kaname KAWAJIRI, Junko WATANABE, Osamu GOTOH, Yusaku TAGASHIRA, Kazuhiro SOGAWA, Yoshiaki FUJII‐KURIYAMA

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    108 Citations (Scopus)

    Abstract

    A human genomic clone (λhP‐450mc‐1), highly homologous to the rat cytochrome P‐450c gene, was isolated and analyzed for the complete nucleotide sequence. The gene structure coincides with that of a recently reported human gene isolated from genomic DNA of a human breast carcinoma cell line, MCF‐7 [Jaiswal, A. K., Gonzalez, F. J. & Nebert, D. W. (1985) Nucleic Acids Res. 13, 4503–4520] with notable exceptions in the first intron: a 320‐base‐pair fragment is inserted and a 650‐base‐pair fragment is deleted in the gene examined in the present study. The 320‐base‐pair insert appears to contain a moderately repetitive sequence (approx. 140 copies) in the human genome. The 650‐base‐pair fragment, present in intron 1 of the reported sequence, is dislocated in the λhP‐450mc‐1 to about 104 base pairs upstream from the putative transcription initiation site. The results of Southern blot analysis using human total DNA were compatible with the gene structure of λhP‐450mc‐1. A fusion gene, which was constructed by ligating the 5′ flanking region of the gene to the structural gene for prokaryotic chloramphenicol acetyltransferase (CAT), inducibly expressed the CAT activity in mouse Hepa‐1 cells in response to administered methylcholanthrene, indicating that the isolated human gene is indeed of methylcholanthrene inducibility.

    Original languageEnglish
    Pages (from-to)219-225
    Number of pages7
    JournalEuropean Journal of Biochemistry
    Volume159
    Issue number2
    DOIs
    Publication statusPublished - 1986 Sep

    ASJC Scopus subject areas

    • Biochemistry

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