Evolution of the mutation rate.

Evolution of the mutation rate.
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DOI:
10.1016/j.tig.2010.05.003
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发表时间:
2010-08
期刊:
影响因子:
11.4
通讯作者:
Lynch, Michael
Lynch, Michael
中科院分区:
生物学1区
文献类型:
--
作者:
Lynch, Michael

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理解进化的机制需要关于新突变的出现率及其在分子和表型水平上的影响的信息。虽然获取这些数据在技术上具有挑战性,但高通量基因组测序正在迅速扩大这一领域的知识。随着现在各种生物体中自发突变的信息的出现,突变率随基因组大小的变化以及驱动这种模式的可能机制的一般模式已经出现。支持的假设,自然选择推突变率下降到一个下限设置的随机遗传漂变的力量,而不是由内在的生理限制,这导致了在真核生物中的复制,转录和翻译保真度的水平降低相对于原核生物。
Understanding the mechanisms of evolution requires information on the rate of appearance of new mutations and their effects at the molecular and phenotypic levels. Although procuring such data has been technically challenging, high-throughput genome sequencing is rapidly expanding knowledge in this area. With information on spontaneous mutations now available in a variety of organisms, general patterns have emerged for the scaling of the mutation rate with genome size and for the likely mechanisms driving this pattern. Support is presented for the hypothesis that natural selection pushes mutation rates down to a lower limit set by the power of random genetic drift rather than by intrinsic physiological limitations, and that this has resulted in reduced levels of replication, transcription, and translation fidelity in eukaryotes relative to prokaryotes.
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