Optimising PHBV biopolymer production in haloarchaea via CRISPRi-mediated redirection of carbon flux.
Optimising PHBV biopolymer production in haloarchaea via CRISPRi-mediated redirection of carbon flux.
复制标题
通过 CRISPRi 介导的碳通量重定向优化盐古菌中 PHBV 生物聚合物的生产
DOI:
10.1038/s42003-021-02541-z
复制
发表时间:
2021-08-25
影响因子:
5.9
通讯作者:
Han J
中科院分区:
文献类型:
--
作者:
Lin L;Chen J;Mitra R;Gao Q;Cheng F;Xu T;Zuo Z;Xiang H;Han J
The haloarchaeonHaloferax mediterraneiis a potential strain for poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) production, yet the production yield and cost are the major obstacles hindering the use of this archaeal strain. Leveraging the endogenous type I-B CRISPR-Cas system inH. mediterranei, we develop a CRISPR-based interference (CRISPRi) approach that allows to regulate the metabolic pathways related to PHBV synthesis, thereby enhancing PHBV production. Our CRISPRi approach can downregulate the gene expression in a range of 25% to 98% depending upon the target region. Importantly, plasmid-mediated CRISPRi downregulation on the citrate synthase genes (citZandgltA) improves the PHBV accumulation by 76.4% (from 1.78 to 3.14 g/L). When crRNA cassette integrated into chromosome, this further shortens the PHBV fermentation period and enhances PHA productivity by 165%. Our transcriptome analysis shows that repression of citrate synthase genes redirects metabolic flux from the central metabolic pathways to PHBV synthesis pathway. These findings demonstrate that the CRISPRi-based gene regulation is a transformative toolkit for fine-tuning the endogenous metabolic pathways in the archaeal system, which can be applied to not only the biopolymer production but also many other applications.
登录
查看更多内容
影响因子:
6.4
作者:
Chang Y;Su T;Qi Q;Liang Q
通讯作者:
Liang Q
DOI:
10.1186/1746-1448-6-9
发表时间:
2010-08-20
期刊:
Saline systems
影响因子:
--
作者:
Han J;Li M;Hou J;Wu L;Zhou J;Xiang H
通讯作者:
Xiang H
影响因子:
4.4
作者:
Cai, Shuangfeng;Cai, Lei;Xiang, Hua
通讯作者:
Xiang, Hua
影响因子:
4.4
作者:
Cai, Shuangfeng;Cai, Lei;Xiang, Hua
通讯作者:
Xiang, Hua
影响因子:
4.4
作者:
Hou, Jing;Feng, Bo;Xiang, Hua
通讯作者:
Xiang, Hua