鉴定cis-regulatory元素提供了关于在绵羊基因组中的组织特异性基因调节的见解
Shangqian Xie1,2, Kimberly M Davenport1,3, Mazdak Salavati4
1Department of Animal, Veterinary, & Food Sciences, University of Idaho, Moscow, ID, USA.
Nature communications
|March 17, 2026
概括
这项研究绘制了绵羊基因调节元件的地图,识别了特定组织的增强剂和促进剂. 研究结果揭示了神经发育,反动物新陈代谢以及牛奶脂肪产量和出生体重等特征的洞察力.
科学领域:
- 基因组学和生物信息学
- 分子生物学分子生物学
- 动物遗传学动物遗传学
背景情况:
- 了解基因调节对于破译生物机制至关重要,特别是动物的组织特异性基因表达.
- 像增强剂和促进剂这样的调控元素在控制基因活性方面发挥着关键作用.
- 对这些元素进行全面的注释对于推进基因组功能研究至关重要.
研究的目的:
- 在24个组织中对成年雌羊的调节元素 (增强剂和促进剂) 进行全面的表征.
- 确定组织特异性的调节机制,特别是在神经发育.
- 为了比较物种间的 cis-regulatory 元素,并确定反动物特定的途径和遗传关联.
主要方法:
- 使用了一种多omics方法,包括ChIP-seq,ATAC-seq,CAGE-seq,RRBS,WGBS和RNA-seq.
- 在24个不同的绵羊组织中分析了274682个增强剂和25975个促进剂.
- 进行了增强剂-促进剂组合与人类,小鼠,猪和牛数据的比较分析.
主要成果:
- 确定了7个与神经发育相关的基因,在大脑组织中具有10多个增强剂,强调组织特异性调节.
- 发现了一种小脑特异性增强剂,调节BDNF基因,参与大脑功能.
- 揭示了杂动物特异性途径 (例如,酶催化),并确定了与特定增强剂相关的乳脂产量 (COMMD1) 和出生体重 (XKR4) 的QTL.
结论:
- 这项研究提供了绵羊细胞调节元件及其组织特异性功能的详细地图.
- 这些发现促进了绵羊参考基因组的功能注释,并提供了对经济上重要的特征的见解.
- 突出了使用监管要素注释来理解复杂特征和改善畜牧养殖的潜力.
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