Evolutionary characteristics of exons expressed at different abundance levels in mammals

Evolutionary characteristics of exons expressed at different abundance levels in mammals
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哺乳动物不同丰度水平表达的外显子的进化特征

DOI:
10.1007/s11434-009-0535-2
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发表时间:
2009-10
期刊:
科学通报(英文版)
影响因子:
--
通讯作者:
Hu WeiHong
Hu WeiHong
中科院分区:
其他
文献类型:
--
作者:
Zhang XiaoYan;Zheng BingRong;Fang Lin;Xiao ChunJie;Yu HaiJing;Ye Jia;Li Jie;Li Xin;Hu WeiHong

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利用比较基因组学的方法,我们评估了哺乳动物中表达丰富、适度或低表达的外显子的进化特征。以非编码区和假基因为对照,进行了序列同源性、PphastCons和Ka/Ks分析,结果表明,由于高丰度外显子高度保守,小外显子和低外显子在进化过程中也表现出保守特征。我们的发现表明,在生物转录组中占很大比例的丰度较低的外显子受到功能限制,可能在丰富生物进化中的生物复杂性方面发挥一定的作用。
With comparative genomics approaches, we evaluated the evolutionary characteristics of conservation of exons which are expressed abundantly, moderately or lowly in mammals. Using non-coding regions and pseudogenes as controls, sequence identity, phastCons andKa/Ksanalyses were carried out and our results showed that as the exons of high abundance are highly conserved, the minor and low exons also showed conservative characteristics in evolution. Our findings suggested that the exons with less abundance which constitute a large proportion of distinct species in transcriptome of organisms are under functional constraint and might play certain roles in enriching biological complexity in the evolution of organisms.
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