title: Primary structure of the cytochrome P450 lanosterol 14 alpha-demethylase gene from Candida tropicalis.
abstract: We report the nucleotide sequence of the gene and flanking DNA for the cytochrome P450 lanosterol 14 alpha-demethylase (14DM) from the yeast Candida tropicalis ATCC750. An open reading frame (ORF) of 528 codons encoding a 60.9-kD protein is identified. This ORF includes a characteristic heme-binding domain, HR2, common to all P450 proteins. This protein and the 14DM from Saccharomyces cerevisiae share 66.5% identical and 23.1% conservatively replaced amino acids in a 516-amino-acid alignment, and thus are orthologous forms of the P450LIA1 gene. Conversely, C. tropicalis 14DM shares relatively little sequence similarity with P450alk, the predominant P450 protein present when this organism is grown on n-alkanes. Sequence information of these three yeast P450s will be useful for structure-function analyses in the future.
authors.affiliation: Department of Microbiology and Molecular Genetics, University of Cincinnati College of Medicine, OH.
authors.forename: C
authors.initials: C
authors.lastname: Chen
authors.forename: V F
authors.initials: VF
authors.lastname: Kalb
authors.forename: T G
authors.initials: TG
authors.lastname: Turi
authors.forename: J C
authors.initials: JC
authors.lastname: Loper
mesh_terms: D001483:Base Sequence; D002175:Candida / Q000235:genetics*; D003062:Codon; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics*; D004271:DNA, Fungal / Q000648:ultrastructure*; D005800:Genes, Fungal; D010088:Oxidoreductases / Q000235:genetics*; D012441:Saccharomyces cerevisiae / Q000235:genetics; D058886:Sterol 14-Demethylase
chemical_list: D003062:Codon; D004271:DNA, Fungal; D003577:Cytochrome P-450 Enzyme System; D010088:Oxidoreductases; D058886:Sterol 14-Demethylase