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MBE Advance Access published online on May 25, 2005
Molecular Biology and Evolution, doi:10.1093/molbev/msi176
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© The Author 2005. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. All rights reserved. For permissions, please e-mail: journals.permissions@oupjournals.org
Accepted May 24, 2005

Research Article

Ectopic Gene Conversions Increase the G+C Content of Duplicated Yeast and Arabidopsis Genes

David Benovoy 1, Robert T. Morris 1, Antoine Morin 1, and Guy Drouin 1*

1 Département de biologie, Université d'Ottawa, Ottawa, Ontario, Canada, K1N 6N5

* To whom correspondence should be addressed.
Guy Drouin, E-mail: gdrouin{at}science.uottawa.ca


  Abstract

Allelic recombination has previously been shown to increase the GC-content of the sequences of a wide variety of eukaryotic species. Ectopic recombination between clustered tandemly repeated genes has also been shown to increase their GC-content. Here we show that gene conversions between the dispersed genes found in the duplicated regions of the yeast and Arabidopsis genomes also increases their GC-content when these genes are more than 88% similar.

Keywords: ectopic; gene conversion; GC-content; recombination; Saccharomyces cerevisiae; Arabidopsis thaliana.
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