Growth of novel epistatic interactions by gene duplication.

Growth of novel epistatic interactions by gene duplication.
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DOI:
10.1093/gbe/evr016
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发表时间:
2011
影响因子:
3.3
通讯作者:
Gu Z
Gu Z
中科院分区:
生物学2区
文献类型:
--
作者:
Jiang H;Xu L;Gu Z

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上位性一直被认为是理解生物系统结构、功能和进化动力学的重要基础。基因复制是遗传新颖性进化的主要机制。在这里,我们证明了基因在复制后进化出了更多的上位性相互作用。上位网络中重复基因对的连通性与其序列分化程度呈正相关。此外,与单拷贝基因相比,重复基因对倾向于上位性地与占据更多功能空间的基因相互作用。这些结果表明,基因复制在上位性进化中起着重要的作用。
Epistasis has long been recognized as fundamentally important in understanding the structure, function, and evolutionary dynamics of biological systems. Gene duplication is a major mechanism of evolution for genetic novelties. Here, we demonstrate that genes evolved significantly more epistatic interactions after duplication. The connectivity of duplicate gene pairs in epistatic networks is positively correlated with the extent of their sequence divergence. Furthermore, duplicate gene pairs tend to epistatically interact with genes that occupy more functional spaces than do single-copy genes. These results show that gene duplication plays an important role in the evolution of epistasis.
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