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解决克里斯帕-卡斯9基因组编辑系统在大肠杆菌中的毒性和效率之间的权衡

Qian Guo^1,2,3, Qi Shen^1,2,3, Qi Hao^1,2,3

¹Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China.

Biotechnology journal

|April 1, 2025

概括

这项研究引入了一种优化的CRISPR-Cas9系统,用于对大肠杆菌BL21 (DE3) 进行高效的基因组编辑,克服了蛋白质表达应用之前的毒性和效率权衡.

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:

大肠杆菌BL21 (DE3) 是异质蛋白表达的关键宿主.
对于大肠杆菌BL21 (DE3) 的现有CRISPR-Cas9系统面临效率和毒性方面的挑战.
有效的基因编辑对于优化大肠杆菌菌株的工业和学术应用至关重要.

研究的目的:

为大肠杆菌BL21 (DE3) 开发一个改进的CRISPR-Cas9基因组编辑系统.
解决CRISPR-Cas9中介基因编辑中的效率-毒性权衡问题.
增强大肠杆菌作为蛋白质表达和合成生物学的主体的实用性.

主要方法:

在编辑阶段使用高复制等离子体暂时诱导Cas9表达.
使用温度敏感的复制体来消除sgRNA等离子体.
使用SacB系统去除表达Cas9的等离子体.
开发了pEBcas9/pEBsgRNA系统,用于优化CRISPR-Cas9基因组编辑.

主要成果:

通过短暂的Cas9表达实现了高效的基因组编辑,减轻了毒性.
与以前的方法相比,编辑系统的删除效率被证明更高.
在大肠杆菌BL21 (DE3) 中成功进行了五轮基因组编辑和同时多位点编辑.
确定了适合用于外源基因多副本综合表达的位置.

结论:

该pEBcas9/pEBsgRNA系统提供了一个有效和强大的解决方案,用于在大肠杆菌BL21 (DE3) 中进行CRISPR-Cas9基因组编辑.
这种优化的系统克服了以前的局限性,促进了复杂的遗传修饰.
该系统具有广泛的潜力,可以促进大肠杆菌在工业生物技术和学术研究中的应用.

关键词:

克里斯普尔-卡斯9是什么意思大肠杆菌埃舍里奇亚BL21 (DE3)编辑编辑编辑多个位点多个位点.塑固化固化等离子体

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