在pAblo·pCasso自我治愈的载体工具集用于无约束的cytidine和adenine基编辑在格拉姆阴性细菌
Ekaterina Kozaeva1, Zacharias S Nielsen1, Manuel Nieto-Domínguez1
1The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark.
Nucleic acids research
|January 5, 2024
概括
一个新的合成生物学工具包使用CRISPR基编辑器用于精确的基因组工程在格兰氏阴性细菌. 这个系统能够有效地使基因失活和纠正,简化了细菌菌株的发展.
科学领域:
- 合成生物学 合成生物学
- 微生物基因组学 微生物基因组学
- 这就是CRISPR技术.
背景情况:
- 在格拉姆阴性细菌中的基因组工程对于研究和生物技术至关重要.
- 对于精确的修改,现有的方法可能是复杂和低效的.
研究的目的:
- 开发一套通用的合成生物学工具包,用于精确的基因组工程在格拉姆阴性细菌.
- 为了使用基于CRISPR的基础编辑器实现单核酸修改.
主要方法:
- 开发和优化基编辑器 (CBE) 和基编辑器 (ABE).
- 使用了Streptococcus pyogenes Cas9 尼克酶 (SpnCas9) 和一个原体空间器相邻动机 (PAM) 放松的 SpnCas9 (SpRY) 变体.
- 设计过早的STOP编码子用于基因失活,并使用ABE将其逆转.
主要成果:
- 在等离子体和基因组目标中实现了精确的C→T/G→A (CBE) 和A→G/T→C (ABE) 替代.
- 在Pseudomonas putida中成功禁用光蛋白和抗生素耐药基因.
- 使用ABE证明了功能性淘汰逆转,并开发了可诱导向量,以便轻松移除平台.
结论:
- 开发的CRISPR基编辑工具包提供了一种强大而高效的基因组工程方法,用于阴性细菌.
- 这项技术通过实现精确的基因编辑和直接删除编辑工具来简化菌株的发展.
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