title: Assessing the identity and expression level of the cytochrome P450 20A1 (CYP20A1) gene in the BPA-, BDE-47, and WAF-exposed copepods Tigriopus japonicus and Paracyclopina nana.
abstract: CYP20A1 is a member of the cytochrome P450 (CYP) superfamily, identified as an orphan P450 without any assigned biological function; hence, its continued status as an "orphan" gene. In order to address this shortcoming in our understanding of this superfamily, we sought to characterize the CYP20A1 gene in the copepods Tigriopus japonicus (Tj-CYP20A1) and Paracyclopina nana (Pn-CYP20A1) at their mRNA transcriptional level. We assessed the response of this gene's expression in various developmental stages and in response to treatment with bisphenol A (BPA), 2, 2', 4, 4'-tetrabromodiphenyl ether (BDE-47), and water accommodated fractions (WAFs) of crude oil. As shown in the vertebrate CYP20A1, both Tj-CYP20A1 and Pn-CYP20A1 contained characteristic conserved motifs and domain regions (I helix, K helix and heme-binding motifs) with unusual amino acid sequences apparent in their gene structure. Also molecular characterization of the putative responsive elements in the promoter regions was performed. We observed transcriptional up-regulation of these genes during post-embryonic developmental stages including sex-specific up-regulation in adults. In addition, concentration- and time-dependent mRNA transcripts in response to xenobiotics (BPA, BDE-47, and WAFs) were seen. This study focuses on the molecular elucidation of CYP20A1 genes and their interactions with xenobiotics in the copepods T. japonicus and P. nana that provides important insight into the biological importance of CYP20A1 in invertebrates.
authors.affiliation: Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea.
authors.forename: Jeonghoon
authors.initials: J
authors.lastname: Han
authors.affiliation: Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea.
authors.forename: Duck-Hyun
authors.initials: DH
authors.lastname: Kim
authors.affiliation: Pathology Division, National Institute of Fisheries Science, Busan 46083, South Korea.
authors.forename: Jung Soo
authors.initials: JS
authors.lastname: Seo
authors.affiliation: Division of Polar Life Sciences, Korea Polar Research Institute, Incheon 21990, South Korea.
authors.forename: Il-Chan
authors.initials: IC
authors.lastname: Kim
authors.affiliation: Department of Microbiology, Immunology and Biochemistry, University of Tennessee, Memphis, TN 38163, United States.
authors.forename: David R
authors.initials: DR
authors.lastname: Nelson
authors.affiliation: Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea. Electronic address: jayeshp24@skku.edu.
authors.forename: Jayesh
authors.initials: J
authors.lastname: Puthumana
authors.affiliation: Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea. Electronic address: jslee2@skku.edu.
authors.forename: Jae-Seong
authors.initials: JS
authors.lastname: Lee
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D001559:Benzhydryl Compounds / Q000633:toxicity*; D033342:Copepoda / Q000187:drug effects* / Q000235:genetics*; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics*; D005786:Gene Expression Regulation / Q000187:drug effects; D055768:Halogenated Diphenyl Ethers / Q000633:toxicity*; D010084:Oxidation-Reduction / Q000187:drug effects; D010578:Petroleum / Q000633:toxicity; D010636:Phenols / Q000633:toxicity*; D011401:Promoter Regions, Genetic / Q000187:drug effects; D012333:RNA, Messenger / Q000235:genetics; D014158:Transcription, Genetic / Q000187:drug effects; D015854:Up-Regulation / Q000187:drug effects; D014874:Water Pollutants, Chemical / Q000633:toxicity*; D015262:Xenobiotics / Q000633:toxicity; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D003577:Cytochrome P-450 Enzyme System; D055768:Halogenated Diphenyl Ethers; D010578:Petroleum; D010636:Phenols; D012333:RNA, Messenger; D014874:Water Pollutants, Chemical; D015262:Xenobiotics; C511295:2,2',4,4'-tetrabromodiphenyl ether; C006780:bisphenol A; D000098826:Bisphenol A Compounds
keywords: CYP20A1; Copepod; Deorphanization; Orphan P450s; Paracyclopina nana; Tigriopus japonicus