在Pichia pastoris中进行CRISPR介导的rDNA集成和光选,以优化路径
Xiaojing Jiang1, Mengxin Li1, Zhijiao Wang1
1Key Laboratory of Biomass Chemical Engineering of Ministry of Education & State Key Laboratory of Biobased Transportation Fuel Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.
Chem & bio engineering
|February 20, 2025
概括
我们开发了CRISPR介导的rDNA集成和光选用于路径优化 (CRISPO),这是一种快速,单步的方法,用于设计酵母细胞工厂. 这种方法显著提高了Pichia pastoris的菜产量,实现了创纪录的标位.
科学领域:
- 合成生物学 合成生物学
- 代谢工程是代谢工程.
- 分子生物学分子生物学
背景情况:
- 基因剂量放大增强异质基因表达.
- 皮奇亚牧草是重组蛋白质生产的首选宿主.
- 传统的多副本集成是缓慢的,昂贵的,容易发生突变.
研究的目的:
- 开发一种快速的,单步方法,用于在Pichia pastoris中集成多重复制路径.
- 通过使用CRISPR介导的rDNA整合和光选 (CRISPO) 来优化基拉尼的生产.
- 为了确定在美酸盐路径中的速率限制酶,以增强单烯酸的产生.
主要方法:
- 已建立的CRISPR介导的rDNA集成和光选用于路径优化 (CRISPO).
- 使用的CRISPRi与甘油诱导的促进剂或CRISPRc与构成性促进剂用于标记物表达.
- 用mCherry查对日拉尼生产的综合日拉尼合成酶基因和识别的速度限制步骤.
主要成果:
- 通过CRISPOi.实现了19,5倍的日醇生产增长.
- 使用CRISPOc.确定了HMG1和ERG12作为在美酸盐路径中的速率限制酶.
- 工程P. pastoris在5升发酵器中产生了6.27g/L的基拉尼 (6.48g/L的总单类),创下了新纪录.
结论:
- 克里斯波为酵母细胞工厂的建设和优化提供了一种简化,无抗生素的方法.
- 克里斯波显著增强了基拉尼奥产量,并促进了途径分析.
- 这种方法代表了P. pastoris工程合成生物学工具箱的宝贵补充.
相关概念视频
CRISPR
Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced Short...
CRISPR and crRNAs
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.
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
CRISPR
Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced Short...
CRISPR/Cas9 Genome Editing
The CRISPR-Cas system serves as a bacterial defense mechanism against invading genetic elements such as viruses and plasmids, forming the foundation for its adaptation as a powerful genome-editing tool. Originally discovered in prokaryotes, this system has been repurposed to revolutionize genetic engineering across a wide range of organisms, including plants, animals, and humans. The core component, Cas9, is an endonuclease derived from Streptococcus pyogenes, capable of introducing...


