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Published on: May 28, 2019

有效的多重基因组编辑的蓝藻细菌Synechocystis sp. 通过CRISPR-Cas12a进行PCC6803的检测

Wei Du¹, Luna L Meister¹, Tobias van Grinsven¹

¹Molecular Microbial Physiology Group, Swammerdam Institute for Life Sciences, Faculty of Science, University of Amsterdam, Amsterdam, The Netherlands.

Biotechnology and bioengineering

|December 20, 2024

概括

这项研究引入了一种新的CRISPR-Cas系统,用于高效的蓝藻细菌基因组工程,克服多重体育的挑战. 开发的方法可以实现精确的基因修饰,加速合成生物学在这些微生物中的应用.

科学领域:

合成生物学合成生物学
微生物遗传学微生物遗传学
生物技术是生物技术.

背景情况:

蓝藻是二氧化碳转化为生物化学品的关键目标.
基因工程工具,包括CRISPR-Cas,在多倍体蓝藻细菌中是有限的.
蓝藻细菌中的多重积分复杂化了高效的基因编辑.

研究的目的:

开发一种高效的基于CRISPR-Cas的基因组工程系统,用于蓝色细菌.
为了克服蓝藻细菌多体性质所带来的局限性.
为了促进基因修饰,提高生化生产.

主要方法:

修改基于RSF1010的复制性等离子体,以简化克隆和高结合效率.
改进了指导RNA (gRNA) 设计,以增强染色体分裂.
通过自然转化引入模板DNA,并使用sacB用于等离子体固化.

主要成果:

在Synechocystis sp.中成功删除中性和基本染色体位点 (sll1797). 在PCC6803.3中,我们可以使用PCC6803.
在4周内使用sacB-sacrose反选择实现的同时,无标记的基因删除.
将YFP与蛋白质降解标签集成到染色体中进行进一步的表征.

结论:

开发的系统显著提高了蓝藻细菌的基因组工程能力.
这一进步预计将加速在蓝藻细菌合成生物学中的研究和应用.
该系统提供了一个强大的平台,用于精确的基因修改在多倍体蓝藻细菌.

关键词:

这就是CRISPR-Cas12a.RSF1010 复制性等离子体综合囊 sp. 的情况. 在PCC6803中,PCC6803是什么?多重遗传修饰是一种多重的遗传修饰.蛋白质降解标签蛋白质降解标签

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Bacteria and archaea are susceptible to viral infections just like eukaryotes; therefore, they have developed a unique adaptive immune system to protect themselves. Clustered regularly interspaced short palindromic repeats and CRISPR-associated proteins (CRISPR-Cas) are present in more than 45% of known bacteria and 90% of known archaea.
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