Statistical methods for detecting molecular adaptation.

Statistical methods for detecting molecular adaptation.
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DOI:
10.1016/s0169-5347(00)01994-7
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发表时间:
2000-12-01
影响因子:
16.8
通讯作者:
Bielawski JP
Bielawski JP
中科院分区:
生物学1区
文献类型:
--
作者:
Yang Z;Bielawski JP

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在过去的几年里,用于检测适应性分子进化的强大统计方法得到了发展。这些方法比较蛋白质编码基因中的同义和非同义替换率,并将高于同义率的非同义替换率视为达尔文选择的证据。从病毒到人类的各种系统中都发现了许多分子适应的案例。尽管之前对位点和时间上的平均速率进行的分析效果不大,但最近设计用于检测单个位点和谱系的正选择的方法已经取得了成功。在这里,我们总结了最近用于检测分子适应的统计方法,并讨论了它们的局限性和可能的​​改进。
The past few years have seen the development of powerful statistical methods for detecting adaptive molecular evolution. These methods compare synonymous and nonsynonymous substitution rates in protein-coding genes, and regard a nonsynonymous rate elevated above the synonymous rate as evidence for darwinian selection. Numerous cases of molecular adaptation are being identified in various systems from viruses to humans. Although previous analyses averaging rates over sites and time have little power, recent methods designed to detect positive selection at individual sites and lineages have been successful. Here, we summarize recent statistical methods for detecting molecular adaptation, and discuss their limitations and possible improvements.
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