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通过基因-表观遗传相互作用建模在小鼠中的3D基因组结构的推算
Lauren Kuffler1, Daniel A Skelly1, Anne Czechanski1
1The Jackson Laboratory, Bar Harbor, United States.
eLife
|April 26, 2024
概括
遗传和表观遗传因素在三维 (3D) 染色质结构中相互作用,影响基因表达. 这项研究揭示了这些相互作用是全基因组普遍的,并受到3D基因组架构的约束,而不仅仅是线性DNA序列.
科学领域:
- 基因组学就是基因组学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
背景情况:
- 基因表达受到遗传变异和DNA可访问性的影响,DNA由三维 (3D) 染色质结构组织.
- 之前对这些遗传-表观遗传相互作用的分析在范围和监管背景上是有限的.
- 了解这些全基因组相互作用对于破译基因调节至关重要.
研究的目的:
- 在基因多样化的群体中对遗传-表观遗传相互作用进行基因组规模分析.
- 系统地识别全球遗传-表观遗传相互作用及其由染色质结构所造成的约束.
- 揭示3D基因组结构在调解这些相互作用中的作用.
主要方法:
- 利用来自多样性杂交小鼠的胚胎干细胞,这是一种具有广泛遗传多样性的种群.
- 分析了176个样本的基因型,基因表达和开放色素.
- 采用回归建模来推断全基因组的遗传-表观遗传相互作用.
主要成果:
- 遗传变异和染色质可访问性之间的统计相互作用在整个基因组中普遍存在.
- 这些相互作用位于受影响基因附近,对应于拓相关域 (TADs).
- 3D基因组结构,而不是线性DNA序列,主要决定了相互作用的可能性.
结论:
- 稳定的3D基因组结构有效指导对调控元素的搜索.
- 多种不同种群中的调控元素可以帮助推断出3D基因组结构.
- 遗传和表观遗传因素在3D染色体组织的框架内起作用,特别是在早期发育过程中.
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