Characterization of structural variation in Tibetans reveals new evidence of high-altitude adaptation and introgression.

Characterization of structural variation in Tibetans reveals new evidence of high-altitude adaptation and introgression.
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藏族结构变异的特征揭示了高海拔适应和基因渗入的新证据

DOI:
10.1186/s13059-021-02382-3
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发表时间:
2021-05-25
期刊:
影响因子:
12.3
通讯作者:
Zhou G
Zhou G
中科院分区:
生物学1区
文献类型:
--
作者:
Quan C;Li Y;Liu X;Wang Y;Ping J;Lu Y;Zhou G

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结构变异(SV)作为一种重要的突变力量,塑造了人类基因组的进化和功能。然而,很少有研究探讨SV在高原适应中的作用,到目前为止,对藏族适应性渐渗SV知之甚少。在这里,我们使用纳米孔测序技术在中国藏族(n = 15)和汉族(n = 10)人群中生成了一个全面的SV目录。在目录中总共38,216个独特的SV中,27%是第一次序列解析。我们系统地评估这些SV在重复序列和功能基因组区域的分布。通过对另外276个基因组进行基因分型,我们鉴定出69个藏汉分层SV和80个候选适应基因。我们还发现了一些适应性渐渗SV候选人,并提供了在1p36.32的335个碱基对的缺失的证据。总之,我们的研究结果突出了SV在藏族高原适应性进化过程中的重要作用,为今后的高原适应性研究提供了宝贵的资源。在线版本包含补充材料,可通过10.1186/s13059-021-02382-3获得。
Structural variation (SV) acts as an essential mutational force shaping the evolution and function of the human genome. However, few studies have examined the role of SVs in high-altitude adaptation and little is known of adaptive introgressed SVs in Tibetans so far. Here, we generate a comprehensive catalog of SVs in a Chinese Tibetan (n = 15) and Han (n = 10) population using nanopore sequencing technology. Among a total of 38,216 unique SVs in the catalog, 27% are sequence-resolved for the first time. We systematically assess the distribution of these SVs across repeat sequences and functional genomic regions. Through genotyping in additional 276 genomes, we identify 69 Tibetan-Han stratified SVs and 80 candidate adaptive genes. We also discover a few adaptive introgressed SV candidates and provide evidence for a deletion of 335 base pairs at 1p36.32. Overall, our results highlight the important role of SVs in the evolutionary processes of Tibetans’ adaptation to the Qinghai-Tibet Plateau and provide a valuable resource for future high-altitude adaptation studies. The online version contains supplementary material available at 10.1186/s13059-021-02382-3.
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发表时间: 2016-05
影响因子: 4.3
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