解决马赛克变体的染色质影响,使用向的Fiber-seq
Stephanie C Bohaczuk1, Zachary J Amador2, Chang Li1
1Division of Medical Genetics, University of Washington School of Medicine, Seattle, Washington 98195, USA.
Genome research
|December 9, 2024
概括
向单分子色素纤维测序 (Fiber-seq) 能够精确地绘制非编码变体及其色素效应. 这种方法揭示了1型肌性衰变的重复不稳定性,并在基因编辑后改变了染色质可访问性.
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:
- 量化非编码马赛克变体需要在单分子水平上同时进行DNA序列和染色质结构分析.
- 传统的染色质测定DNA片段,防止对单个分子对序列和3D染色质结构进行配对分析.
研究的目的:
- 开发和应用一种新的方法,用于对基因组和表观基因组信息的同时,长时间读取,单分子分析.
- 研究非编码马赛克变体对染色体架构的功能后果.
主要方法:
- 针对性单分子色素纤维测序 (Fiber-seq) 已开发用于>100 kb的位置丰富.
- 纤维测量被应用于研究致病性CTG重复扩张在肌性发育不良1.
- 纤维测量被用来评估氨基基编辑对人类造血细胞中的玛环球蛋白促进体的影响.
主要成果:
- 向的Fiber-seq实现了~10倍的丰富度,并使单分子,长读造型.
- 致病性CTG在*DMPK*中的重复扩张表现出重复长度依赖的体质不稳定性和调节元件的破坏.
- 腺基编辑增加了血液细胞中*HBG1*促进体和邻近元素的可访问性.
结论:
- 定向光纤seq是一个强大的工具,用于剖析非编码马赛克变体的功能影响.
- 非编码变体可以诱导复杂的染色质改变,超越变体的直接调节元件.
- 了解这些复杂的染色质效应对于解释变异致病性和开发基因疗法至关重要.
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