The genomic landscape and evolutionary resolution of antagonistic pleiotropy in yeast.
The genomic landscape and evolutionary resolution of antagonistic pleiotropy in yeast.
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DOI:
10.1016/j.celrep.2012.09.017
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发表时间:
2012-11-29
期刊:
影响因子:
8.8
通讯作者:
Zhang J
中科院分区:
文献类型:
--
作者:
Qian W;Ma D;Xiao C;Wang Z;Zhang J
Antagonistic pleiotropy (AP) or genetic tradeoff is an important concept invoked frequently in theories of aging, cancer, genetic disease, and other common phenomena. But, it is unclear how prevalent AP is, which genes are subject to AP, and to what extent and how AP may be resolved. By measuring the fitness difference between the wild-type and null alleles of ~5000 nonessential genes in yeast, we find that, in any given environment, yeast expresses hundreds of genes that harm rather than benefit the organism, demonstrating widespread AP. Nonetheless, under sufficient selection, AP is often resolvable through regulatory evolution, primarily by trans-acting changes, although in one case we also detect a cis-acting change and localize its causal mutation. AP resolution, however, is slower in smaller populations, predicting more unresolved AP in multicellular organisms than in yeast. These findings provide the empirical foundation for AP-dependent theories and have broad biomedical and evolutionary implications.
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