Evidence of positive selection in mitochondrial complexes I and V of the African elephant.

Evidence of positive selection in mitochondrial complexes I and V of the African elephant.
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DOI:
10.1371/journal.pone.0092587
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Eggert LS
Eggert LS
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Finch TM;Zhao N;Korkin D;Frederick KH;Eggert LS

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随着物种的进化,它们逐渐适应了当地的环境。然而,检测选择的遗传特征并将其与生物体的表型联系起来是一项挑战。在这里,我们报告使用一种综合的方法,结合DNA测序与结构生物学分析,以评估选择对两种非洲象的线粒体DNA中的残基的影响。我们检测到的证据,积极选择作用于复合物I和V中的残基,我们使用同源蛋白质结构建模,以评估所选残基的生化特性对酶结构的影响。考虑到这些酶在氧化磷酸化中的作用,我们建议所选的残留物可能有助于森林和稀树草原大象对其独特栖息地的代谢适应。
As species evolve, they become adapted to their local environments. Detecting the genetic signature of selection and connecting that to the phenotype of the organism, however, is challenging. Here we report using an integrative approach that combines DNA sequencing with structural biology analyses to assess the effect of selection on residues in the mitochondrial DNA of the two species of African elephants. We detected evidence of positive selection acting on residues in complexes I and V, and we used homology protein structure modeling to assess the effect of the biochemical properties of the selected residues on the enzyme structure. Given the role these enzymes play in oxidative phosphorylation, we propose that the selected residues may contribute to the metabolic adaptation of forest and savanna elephants to their unique habitats.
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