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发色的多祖先串联重复关联研究,使用外基因组范围的测序

Victoria Fazzari, Ashley Moo-Choy, Mary Anne Panoyan

bioRxiv : the preprint server for biology

|March 11, 2024

概括

研究人员发现了16个双重重复 (TR) 影响人类头发颜色,独立于单核酸多态 (SNP). 这些TR可以预测头发颜色,强调它们在人类特征变异中的重要作用.

科学领域:

遗传学是一个遗传学.
人类特征变化变化
基因组研究基因组研究

背景情况:

人类头发颜色是一个复杂的特征,受到众多遗传因素的影响.
全基因组关联研究 (GWAS) 已经确定了与头发颜色相关的单核酸多态 (SNP),但它们的生物机制仍然不清楚.
其他遗传元素,如双重重复 (TRs) 在头发颜色变异中的作用较少被探索.

研究的目的:

识别和描述影响人类头发颜色的双重重复 (TRs).
调查TRs在独立于已知的SNP关联的情况下预测头发颜色的潜力.
探索TR变异对相关蛋白质的结构和功能影响.

主要方法:

全基因组分析以确定与头发颜色表型相关的TRs.
跨不同祖先群体的关联研究来证实TR效应.
在蛋白质编码区域内分析TR扩张/收缩.
基于TR变异的多基因分数的开发,用于预测头发颜色.

主要成果:

确定了16个与不同模型中的头发颜色变化有显著关联的TRs.
在不同的人群中发现了两种与头发颜色相关的额外TRs.
观察到几种TRs改变了氨基酸序列,可能影响蛋白质结构和功能.
证明TRs,独立于SNP变异,可以创建一个附加的多基因得分预测更深的头发颜色.

结论:

串联重复 (TRs) 是影响人类头发颜色的显著,低估的变化来源.
TRs对头发颜色产生实质性和独立的影响,与SNP相当或超过SNP.
这项研究扩大了对人类特征遗传结构的理解,并突出了TRs作为表型多样性的关键贡献者.

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