CRISPR/Cas9诱导的DNA断裂引发了交叉,染色体损失和类似染色体变的重排
Aviva Samach1, Fabrizio Mafessoni1, Or Gross1
1Department of Plant and Environmental Sciences, The Weizmann Institute of Science, Rehovot 7610001,Israel.
The Plant cell
|July 27, 2023
概括
我们开发了一种新的测试方法来研究植物中的DNA双链断裂 (DSB),揭示了CRISPR诱导的基因组不稳定性和大规模的重组,如染色体.
科学领域:
- 植物遗传学 植物遗传学
- 分子生物学分子生物学
- 基因组学就是基因组学.
背景情况:
- 通过非同类末端连接 (NHEJ) 或同类重组 (HR) 来修复DNA双链断裂 (DSB).
- 未经修复的DSB的后果以及由此产生的植物基因组损伤仍然不太清楚.
研究的目的:
- 开发和使用一种用于检测植物体细胞中异构性损失 (LOH) 的新型试验.
- 研究植物中DSB诱导的基因组事件的范围,特别是由CRISPR-Cas9技术调解的基因组事件.
主要方法:
- 在西红 (Solanum lycopersicum) 中使用表型标记物 (贝塔林色素) 开发了失失异性 (LOH) 试验.
- 使用CRISPR-Cas9诱导了DSB,并分析了LOH事件的体质部门.
- 通过全基因组测序,分子和细胞学分析来表征复杂的基因组重组.
主要成果:
- 检测到细菌传播的体质交叉事件,小删除和整个染色体损失.
- 证明了CRISPR诱导的DSB与主要染色体重排的相关性,包括片段损失,反转和转位.
- 提供了断裂-融合-桥梁循环的证据,导致类似染色体变的重排.
结论:
- 开发的LOH试验是通过有针对性的交叉检测精确养的宝贵工具.
- 在植物中,CRISPR-Cas9可以诱导类似染色体的事件和显著的基因组不稳定性.
- 这项研究增强了对植物中DSB修复途径和基因组动态的理解.
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