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为非模型微生物Erwinia persicina开发基于CRISPR-Cas9的基因组编辑工具

Tingfeng Cheng^1,2, Xinyan Cao^1,3, Yuchen Wang^1,4

¹State Key Laboratory of Engineering Biology for Low-Carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, PR China.

Synthetic and systems biotechnology

|March 17, 2025

概括

克里斯普尔-Cas9基因编辑现在在Erwinia persicina中有效,克服了以前的局限性. 这一突破使得E. persicina成为合成生物学应用的多功能底盘.

科学领域:

微生物学微生物学
分子生物学分子生物学
合成生物学合成生物学

背景情况:

Erwinia persicina是一种植物致病细菌,以产生二次代谢产物而闻名.
之前在E. persicina的基因操纵是低效的,因为自杀等离子体介导的基因组编辑的局限性.
开发高效的遗传工具对于探索E. persicina在合成生物学中的潜力至关重要.

研究的目的:

建立和优化CRISPR-Cas9系统,以实现Erwinia persicina的高效基因组编辑.
为了证明这个系统对大基因组片段删除和基因插入的实用性.
为了验证E. persicina作为合成生物学应用的可行的底盘,包括化合物生产.

主要方法:

通过修改原生gRNA促进子 (J23119) 和优化gRNA设计,设计了一个单质粒CRISPR-Cas9系统.
利用双重gRNA来有效删除大型基因组片段 (42kb) 和用于代淘汰的sacB标记.
采用自电阻等离子体的伴侣转移,以高效地插入6.4kb的碎片.

主要成果:

在E. persicina.中成功应用CRISPR-Cas9进行高效的基因组编辑.
实现了42kb基因组片段的删除和6.4kb片段的高效插入.
在工程E. persicina底盘中,证明了抗紫外线化合物shinorine的生产.

结论:

优化的CRISPR-Cas9系统为E. persicina的遗传操纵提供了一个有效的工具.
Erwinia persicina已被确立为合成生物学应用的有前途的底盘.
这项研究为开发其他非模型微生物的基因编辑系统提供了一个模型.

关键词:

克里斯普尔-Cas9是什么意思埃尔温尼亚·帕尔西西卡纳 (Erwinia persicina) 是一种葡萄.基因组编辑基因组编辑非模型微生物非模型微生物新诺林是什么意思?新诺林是什么意思?

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