用BreakTag对基因组编辑核酶活性进行多层次的表征
Gabriel M C Longo1,2,3,4, Sergi Sayols5, Vassilis Roukos6,7
1Institute of Molecular Biology, Mainz, Germany. gmellodacunhalongo@mgh.harvard.edu.
Nature protocols
|November 19, 2025
概括
突破标签是一种新的测序方法,用于对基因编辑核酶和指导RNA进行无偏的表征. 它可以精确评估核酶活性,特异性和DNA断裂概况,以改进CRISPR应用.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 生物信息学是一种生物信息学.
背景情况:
- CRISPR-Cas基因编辑需要精确地描述核酶活性和特异性.
- 现有的方法可能缺乏全面分析所需的可扩展性或公正性.
- 了解DNA双链断裂概况对于预测基因编辑结果至关重要.
研究的目的:
- 引入BreakTag,一种可扩展的下一代基于测序的方法,用于对可编程核酶和指导RNA的公正表征.
- 为了使核酶活性,特异性和裂变配置文件的高通量评估.
- 开发计算工具 (BreakInspectoR和XGScission) 用于数据分析和断裂模式的预测.
主要方法:
- 突破标签涉及基因组DNA的Cas9/guideRNA消化,双链断裂的丰富以及下一代测序.
- 打破InspectoR软件促进核酶活动,特异性和裂变配置文件的高通量分析.
- 机器学习模型XGScission可以预测双链断裂类型 (形/分阶段),并有助于预选目标序列.
- HiPlex 能够将成千上万个单一指导RNAs 的聚合生成为强大的 BreakTag 数据集.
主要成果:
- 突破标签提供了可编程核酶和指导RNA的无偏见,多层次的表征.
- 该方法准确评估核酶活性,非目标效应和详细的裂变概况.
- BreakInspectoR和XGScission能够有效地分析数据,并预测裂变的结果.
- 整个BreakTag工作流程,包括分析,可以在约3天内完成.
结论:
- "BreakTag"是一个强大的,可扩展的工具,用于对基因编辑核酶进行全面的表征.
- 相关的计算工具增强了BreakTag在CRISPR研究和开发中的实用性.
- 突破标签通过提供对核酶功能和DNA修复结果的机制性见解,促进了基因编辑策略的优化.
相关概念视频
01:11Restriction Enzymes
35.5K
Restriction enzymes are bacterial enzymes used to cut DNA in a sequence-specific manner. To cleave DNA, they bind to specific palindromic sequences called restriction sites. Such palindromic DNA sequences or inverted repeats are commonly found in regions of functional significance, such as the origin of replication, gene operator sites, and regions containing transcription termination signals.
The host bacteria protect their own genomic DNA from these enzymes by methylating these sites. Some...
The host bacteria protect their own genomic DNA from these enzymes by methylating these sites. Some...
35.5K
02:04Fixing Double-strand Breaks
14.2K
The double-stranded structure of DNA has two major advantages. First, it serves as a safe repository of genetic information where one strand serves as the back-up in case the other strand is damaged. Second, the double-helical structure can be wrapped around proteins called histones to form nucleosomes, which can then be tightly wound to form chromosomes. This way, DNA chains up to 2 inches long can be contained within microscopic structures in a cell. A double-stranded break not only damages...
14.2K