Fine-Tuning of hemB Using CRISPRi for Increasing 5-Aminolevulinic Acid Production in Escherichia coli
Fine-Tuning of hemB Using CRISPRi for Increasing 5-Aminolevulinic Acid Production in Escherichia coli
复制标题
使用 CRISPRi 微调 hemB 以增加大肠杆菌中 5-氨基乙酰丙酸的产量
DOI:
10.3389/fmicb.2019.01731
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发表时间:
2019-07
影响因子:
5.2
通讯作者:
Qi Qingsheng
中科院分区:
文献类型:
--
作者:
Su Tianyuan;Guo Qi;Zheng Yi;Liang Quanfeng;Wang Qian;Qi Qingsheng
5-aminolevulinic acid (5-ALA) is an important metabolic intermediate in the biosynthesis of heme and has been broadly applied in medicine, agriculture, and organic synthesis. Compared to the chemical synthesis methods, microbial fermentation of ALA has significant economic and environmental advantages. However, the heme biosynthesis pathway downstream of ALA is essential for cell survival, so it cannot be completely blocked. In this work, we fine-tuned the expression of HemB, the key enzyme involved in heme biosynthesis, using CRISPR interference (CRISPRi), and investigated its effect on promoting ALA accumulation. The activity of HemB was down-regulated by 15, 19, 33, 36, 71, and 80% respectively, with six CRISPRi sites targeting various regions of hemB. ALA accumulation in these hemB weakened strains varied from 90.2 to 493.1% compared to that of the original strain. This work provided new insights into fine-tuning of heme biosynthesis pathway for promoting ALA production.
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影响因子:
3.5
作者:
CHEREPANOV, PP;WACKERNAGEL, W
通讯作者:
WACKERNAGEL, W
影响因子:
3
作者:
Wendl MC
通讯作者:
Wendl MC
影响因子:
11.9
作者:
F. Leeper
通讯作者:
F. Leeper
DOI:
10.1159/000459097
发表时间:
1982-01-01
期刊:
ENZYME
影响因子:
--
作者:
SASSA, S
通讯作者:
SASSA, S
DOI:
--
发表时间:
1976
期刊:
Annals of clinical research
影响因子:
--
作者:
R. Poulson
通讯作者:
R. Poulson