TY - JOUR
T1 - Evolutionary toxicogenomics
T2 - Diversification of the Cyp12d1 and Cyp12d3 genes in Drosophila species
AU - McDonnell, Cynthia M.
AU - King, Darrin
AU - Comeron, Josep M.
AU - Li, Hongmei
AU - Sun, Weilin
AU - Berenbaum, May R.
AU - Schuler, Mary A.
AU - Pittendrigh, Barry R.
N1 - Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2012/6
Y1 - 2012/6
N2 - Gene duplication and divergence are overwhelmingly considered to be the primary mechanisms by which cytochrome P450 monooxygenases (P450s) have radiated into a large and diverse gene superfamily. To address how environmental stress drives the fixation and diversification of gene duplications, we have analyzed Cyp12d1 and Cyp12d3, a pair of duplicated genes found in the sequenced Drosophila genomes of the melanogaster group. The paralog Cyp12d3, which is not found in Drosophila melanogaster, is basal to the melanogaster group, after it split fromthe obscura group (ca. 50 mya), and has a significant signature of positive selection in two species (D. sechellia and D. ananassae). Examination of the Cyp12d1 region in D. melanogaster wildtype and isoline populations revealed variation both in copy number and sequence, including splice-site variations, which certainly alter gene function. Further investigations of several strains have identified three cases inwhich differences in the Cyp12d1 gene region are associatedwith the differences in transcript abundance and transcriptional responses to the environmental stresses that have not been seen for other detoxificative loci. Together, these data highlight the value of using both macro- and microevolutionary approaches in studying the duplication and divergence events associated with detoxification genes and lay important groundwork for future studies in the field of evolutionary toxicogenomics, which uses the principles of phylogenetic analysis to predict possible enzymatic functions.
AB - Gene duplication and divergence are overwhelmingly considered to be the primary mechanisms by which cytochrome P450 monooxygenases (P450s) have radiated into a large and diverse gene superfamily. To address how environmental stress drives the fixation and diversification of gene duplications, we have analyzed Cyp12d1 and Cyp12d3, a pair of duplicated genes found in the sequenced Drosophila genomes of the melanogaster group. The paralog Cyp12d3, which is not found in Drosophila melanogaster, is basal to the melanogaster group, after it split fromthe obscura group (ca. 50 mya), and has a significant signature of positive selection in two species (D. sechellia and D. ananassae). Examination of the Cyp12d1 region in D. melanogaster wildtype and isoline populations revealed variation both in copy number and sequence, including splice-site variations, which certainly alter gene function. Further investigations of several strains have identified three cases inwhich differences in the Cyp12d1 gene region are associatedwith the differences in transcript abundance and transcriptional responses to the environmental stresses that have not been seen for other detoxificative loci. Together, these data highlight the value of using both macro- and microevolutionary approaches in studying the duplication and divergence events associated with detoxification genes and lay important groundwork for future studies in the field of evolutionary toxicogenomics, which uses the principles of phylogenetic analysis to predict possible enzymatic functions.
KW - 12 Drosophila genomes
KW - 30 UTR
KW - Comparative genomics
KW - Cyp12d1
KW - Cytochrome P450 monooxygenase genes
KW - Drosophila melanogaster
KW - Evolutionary toxicology
KW - Gene duplication
KW - Polyadenylation signal
KW - Xenobiotics
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U2 - 10.1007/s00239-012-9506-3
DO - 10.1007/s00239-012-9506-3
M3 - Article
C2 - 22811321
AN - SCOPUS:84865791720
SN - 0022-2844
VL - 74
SP - 281
EP - 296
JO - Journal of Molecular Evolution
JF - Journal of Molecular Evolution
IS - 5-6
ER -