将CRISPR扫描与使用双链DNA脱氨酶的向色素可访问性概况相结合.
Heejin Roh1,2, Simon P Shen1,2, Yan Hu2,3
1Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA.
Nature methods
|September 11, 2025
概括
我们开发了针对性去氨酶可访问的染色质测序 (TDAC-seq),以分析单个DNA分子中的染色质可访问性. 这种基因组编辑方法将基因变化与单核酸分辨率的染色质可访问性联系起来.
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:
- 基因组编辑推进了对cis-regulatory元素的理解.
- 目前的方法很难在单个,长的DNA分子上描述染色质的可访问性.
研究的目的:
- 开发一种方法,在单个染色体纤维上的特定基因组位点上分析染色质可访问性.
- 在单核酸分辨率下将基因组编辑结果与染色质可访问性变化联系起来.
主要方法:
- 使用cytidine deaminases开发了针对性去氨酶可访问的染色体测序 (TDAC-seq).
- 应用了TDAC-seq与CRISPR扰动用于序列功能映射.
- 利用长读数测序来对目标位置进行高分辨率分析.
主要成果:
- TDAC-seq成功地分析了内源性位置上的染色质可访问性.
- 集成的TDAC-seq与CRISPR编辑来映射对HSPC胎儿血红蛋白激活的影响.
- 应用TDAC-seq来分析GFI1B增强剂与骨髓增殖性瘤相关的变体.
结论:
- TDAC-seq提供了高分辨率,单分子的染色质可访问性的映射.
- 该方法可以将基因组编辑与染色体可访问性变化联系起来.
- TDAC-seq是一个可扩展的工具,用于查询调节元件功能和与疾病相关的变异.
相关概念视频
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The CRISPR-Cas system serves as a bacterial defense mechanism against invading genetic elements such as viruses and plasmids, forming the foundation for its adaptation as a powerful genome-editing tool. Originally discovered in prokaryotes, this system has been repurposed to revolutionize genetic engineering across a wide range of organisms, including plants, animals, and humans. The core component, Cas9, is an endonuclease derived from Streptococcus pyogenes, capable of introducing...


