在Bacillus subtilis中通过微型DNA核酶IscB进行高效的基因组编辑
Jie Gao1, Hengyi Wang1, Jingtao Sun1
1College of Life Sciences, Sichuan Normal University, Chengdu, 610101, China.
Synthetic and systems biotechnology
|July 30, 2025
概括
使用IscB (增强IscB) 的新型,较小的DNA编辑系统在Bacillus subtilis中显示出高效率. 这种工具可以实现精确的基因组编辑和基因集成,用于创建用于生物分子生产的工程细菌.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 生物技术是生物技术.
背景情况:
- 在Bacillus subtilis中进行CRISPR基因组编辑受到大型Cas基因大小的阻碍.
- IscB是一种较小的DNA核酶,为基因组编辑提供了潜在的替代方案.
- 在 Bacillus subtilis 中 IscB 的应用尚未先前被探索.
研究的目的:
- 在 Bacillus subtilis.中建立和评估基于 IscB 的基因组编辑系统.
- 评估IscB和增强IscB (enIscB) 在基因删除和集成中的效率.
- 为了确定使用IscB系统进行序列基因组编辑的可行性.
主要方法:
- 开发了两个基于 IscB 的系统:pBsuIscB 和 pBsuenIscB 在 Bacillus subtilis SCK6.6. 中.
- 测试各种基因组目标的删除效率.
- 评估单拷贝和多拷贝基因 (mCherry) 的基因整合能力.
- 在第二轮基因组编辑中评估系统的性能.
主要成果:
- 无论是pBsuIscB还是pBsuenIscB系统,都实现了从13.3%到100%的删除效率.
- 与pBsuIscB相比,pBsuIscB系统的删除效率更高,可以用单个 ωRNA 进行大片段删除.
- 该pBsuenIscB系统成功地整合了单拷贝和多拷贝的mCherry基因.
- 使用pBsuenIscB系统实现了高效的第二轮基因组编辑.
结论:
- IscB 是一种可行的工具,用于编辑细菌细菌的基因组.
- 增强的IscB (enIscB) 系统为基因删除和整合提供了高效率.
- 这项技术有助于开发工程 Bacillus subtilis 菌株,用于大规模生物分子生产.
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