Primate transcript and protein expression levels evolve under compensatory selection pressures.

Primate transcript and protein expression levels evolve under compensatory selection pressures.
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DOI:
10.1126/science.1242379
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发表时间:
2013-11-29
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Gilad Y
Gilad Y
中科院分区:
其他
文献类型:
--
作者:
Khan Z;Ford MJ;Cusanovich DA;Mitrano A;Pritchard JK;Gilad Y

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基因调控的变化可能在灵长类动物的进化中发挥了重要作用。在灵长类动物中,mRNA表达水平的差异经常被记录下来,然而,目前还不知道对mRNA水平差异的测量在多大程度上反映了蛋白质表达水平的差异,这可能在确定表型差异方面更重要。我们使用高分辨率定量质谱仪收集了人类、黑猩猩和恒河猴淋巴母细胞系(LCL)的蛋白质表达测量结果,并将它们与相同样本的转录表达数据进行了比较。我们发现了几十个基因在不同物种之间在mRNA水平上存在显着差异,但在蛋白质表达上几乎没有差异。总体而言,我们的数据表明,蛋白质表达水平比mRNA水平在更强的进化约束下进化。
Changes in gene regulation have likely played an important role in the evolution of primates. Differences in mRNA expression levels across primates have often been documented, however, it is not yet known to what extent measurements of divergence in mRNA levels reflect divergence in protein expression levels, which are probably more important in determining phenotypic differences. We used high-resolution, quantitative mass spectrometry to collect protein expression measurements from human, chimpanzee, and rhesus macaque lymphoblastoid cell lines (LCLs) and compared them to transcript expression data from the same samples. We found dozens of genes with significant expression differences between species at the mRNA level yet little or no difference in protein expression. Overall, our data suggest that protein expression levels evolve under stronger evolutionary constraint than mRNA levels.
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