Molecular cloning of CYP1A from the estuarine fish Fundulus heteroclitus and phylogenetic analysis of CYP1 genes: update with new sequences

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• 作者：Morrison ; Hilary G. ; Weil ; E. Jennifer ; Karchner ; Sibel I. ; Sogin ; Mitchell L. ; Stegeman ; John J.
• 关键词：CYP1A subfamily ; CYP1B ; Vertebrate lineages ; Mammalian lineage ; Divergence ; Phylogenetic analyses
• 刊名：Comparative Biochemistry and Physiology -- Part C: Pharmacology, Toxicology and Endocrinology
• 出版年：1998
• 出版时间：November 1, 1998
• 年：1998
• 卷：121
• 期：1-3
• 页码：231-240
• 全文大小：294 K

文摘

Since we published a phylogenetic analysis of the CYP1A subfamily in 1995, several additional full-length sequences have been reported, including three members of an entirely new subfamily, CYP1B. Two avian sequences were recently published, so that CYP1A sequence data are now available from three of the five major vertebrate lineages. The two new branches that have been added to the CYP1 family tree significantly add to our understanding of P450 evolution. The inclusion of the CYP1Bs to the phylogenetic analysis allows us to root inferred trees. Addition of the avian CYP1As indicates that the CYP1A1/CYP1A2 duplication present in the mammalian lineage may have occurred after the divergence of birds and mammals. The number of fish species from which full-length coding regions of CYP1A genes have been sequenced has increased from four (trout, plaice, toadfish, and scup) to nine. These include CYP1A sequences from tomcod, butterflyfish, sea bream, sea bass, and the full-length sequence of CYP1A from the killifish Fundulus heteroclitus that is reported here. Phylogenetic analyses incorporating the new fish CYP1A sequences support our original conclusion that the fish CYP1As are monophyletic and indicate that the genes are evolving at very different rates in different species. Publisher: Elsevier Science Language of Publication: English Item Identifier: S0742-8413(98)10044-0 Publication Type: Article ISSN: 0742-8413 Cited by:

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Footnotes:

1. This article was invited by Guest Editors Dr John J. Stegeman and Dr David R. Livingstone to be part of a special issue of CBP on cytochrome P450 (Comp. Biochem. Physiol. 121 C, pages 1–412, 1998).

2. Invited review for Chemico-Biological Interactions.