title: Cytochrome P450 family 4 in a cockroach: molecular cloning and regulation by regulation by hypertrehalosemic hormone.
abstract: Hypertrehalosemic hormone (a carbohydrate-mobilizing neuroendocrine decapeptide) and starvation markedly increased levels of a cockroach (Blaberus discoidalis) fat body cytochrome P450 message. The gene represented by the cloned P450 cDNA has been named CYP4C1 (cytochrome P450 family 4, subfamily C, gene 1), a newly identified member of the ubiquitous cytochrome P450 monooxygenase gene superfamily. Blaberus CYP4C1 (511 amino acids, Mr = 58,485) has a hydrophobic NH2 terminus and a sequence near the COOH terminus that is homologous to the cysteine-containing heme-binding region definitive of cytochromes P450. The cockroach sequence is 32-36% identical to mammalian family 4A and 4B enzymes. It contains a 13-residue sequence characteristic of family 4 but not other P450s. This study suggests that CYP4C1 is hormonally regulated in association with energy substrate mobilization and supports the idea that family 4 is an old and widespread gene family.
authors.affiliation: Department of Entomology, Texas A&M University, College Station 77843-2475.
authors.forename: J Y
authors.initials: JY
authors.lastname: Bradfield
authors.forename: Y H
authors.initials: YH
authors.lastname: Lee
authors.forename: L L
authors.initials: LL
authors.lastname: Keeley
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D003058:Cockroaches / Q000235:genetics*; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics*; D004247:DNA / Q000235:genetics / Q000302:isolation & purification; D005786:Gene Expression Regulation / Q000187:drug effects*; D006801:Humans; D007301:Insect Hormones / Q000494:pharmacology*; D008297:Male; D008969:Molecular Sequence Data; D009479:Neuropeptides / Q000494:pharmacology*; D009693:Nucleic Acid Hybridization; D051381:Rats; D012689:Sequence Homology, Nucleic Acid
chemical_list: D007301:Insect Hormones; D009479:Neuropeptides; C068004:hypertrehalosemic neuropeptide; D004247:DNA; D003577:Cytochrome P-450 Enzyme System