title: Molecular cloning and mRNA expression of cytochrome P4501A1 and 1A2 in the liver of common minke whales (Balaenoptera acutorostrata).
abstract: This study presents full-length cDNA sequences of CYP1A1 and 1A2, in common minke whale (Balaenoptera acutorostrata) from the North Pacific. Both CYP1A1 and CYP1A2 cDNAs had an open reading frame of 516 amino acid residues, and predicted molecular masses were 58.3 kDa and 58.1 kDa, respectively. The deduced full-length amino acid sequence of CYP1A1 revealed higher identities with those of sheep (86%) and pig (87%), and that of CYP1A2 was most closely related to human (82%) and monkey CYP1A2 (82%) among species from which CYP1A2 has been isolated so far. Differences in certain conserved and functional amino acid residues of CYP1A1 and 1A2 between common minke whale and other mammalian species indicate the possibility of their specific metabolic function. Concentrations of organochlorine compounds (OCs) including PCBs and DDTs analyzed in common minke whale liver showed no significant correlation with hepatic mRNA expression levels of CYP1A1 and CYP1A2, indicating no induction of these enzymes by such OCs.
authors.affiliation: Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama 790-8577, Japan.
authors.forename: Satoko
authors.initials: S
authors.lastname: Niimi
authors.forename: Michio X
authors.initials: MX
authors.lastname: Watanabe
authors.forename: Eun-Young
authors.initials: EY
authors.lastname: Kim
authors.forename: Hisato
authors.initials: H
authors.lastname: Iwata
authors.forename: Genta
authors.initials: G
authors.lastname: Yasunaga
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Fujise
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Tanabe
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D019363:Cytochrome P-450 CYP1A1 / Q000235:genetics / Q000378:metabolism*; D019388:Cytochrome P-450 CYP1A2 / Q000235:genetics / Q000378:metabolism*; D017931:DNA Primers; D018076:DNA, Complementary / Q000235:genetics; D004785:Environmental Pollutants / Q000032:analysis; D006843:Hydrocarbons, Chlorinated / Q000032:analysis; D008099:Liver / Q000737:chemistry / Q000378:metabolism*; D050636:Minke Whale / Q000235:genetics*; D008969:Molecular Sequence Data; D010140:Pacific Ocean; D010802:Phylogeny; D012333:RNA, Messenger / Q000378:metabolism*; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA
chemical_list: D017931:DNA Primers; D018076:DNA, Complementary; D004785:Environmental Pollutants; D006843:Hydrocarbons, Chlorinated; D012333:RNA, Messenger; D019363:Cytochrome P-450 CYP1A1; D019388:Cytochrome P-450 CYP1A2