title: Assignment of the gene for adrenal P450c17 (steroid 17 alpha-hydroxylase/17,20 lyase) to human chromosome 10.
abstract: P450c17 is the single enzyme mediating both 17 alpha-hydroxylase and 17,20 lyase activities. We identified several human P450c17 cDNA clones in a human adrenal cDNA library we constructed in lambda gt10. A short clone containing the 3'-terminal 650 bases of the full-length sequence was used to examine Southern blots of DNA from normal persons and from a panel of mouse/human somatic cell hybrid lines. The pattern of hybridization of this cDNA to normal human DNA cut with 8 restriction endonucleases suggests the human genome has two (or more) P450c17 genes. The pattern of hybridization to the somatic cell hybrid cell lines, each containing a limited, known number of human chromosomes, indicates the human adrenal P450c17 gene lies on chromosome 10. The chromosomal locations of the other P450c17 genes could not be determined.
mesh_terms: D000311:Adrenal Glands / Q000201:enzymology*; D000446:Aldehyde-Lyases / Q000235:genetics*; D000818:Animals; D002874:Chromosome Mapping; D002906:Chromosomes, Human, 6-12 and X; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics*; D004247:DNA; D006801:Humans; D006822:Hybrid Cells; D051379:Mice; D009693:Nucleic Acid Hybridization; D013254:Steroid 17-alpha-Hydroxylase / Q000235:genetics*; D013250:Steroid Hydroxylases / Q000235:genetics*
chemical_list: D004247:DNA; D003577:Cytochrome P-450 Enzyme System; D013250:Steroid Hydroxylases; D013254:Steroid 17-alpha-Hydroxylase; D000446:Aldehyde-Lyases