Regulation of β-mercuryl alcohol metabolic flow in Saccharomyces cerevisiae cells / 中国中药杂志
China Journal of Chinese Materia Medica
;
(24): 3819-3825, 2020.
Article
in Chinese
| WPRIM
| ID: wpr-828380
ABSTRACT
In this study, citrate synthase gene(CIT2), and malate synthase gene(MLS1) were successfully knocked out in β-amyrin-producing yeast cells by using CRISPR/CAS9. The promoter of phosphoglucose isomerase gene(PGI1) was replaced by that of cytochrome c oxidase subunit Ⅶa(Cox9)to weaken its expression, aiming to channel more carbon flux into the NADPH-producing pathway. The fermentation results showed that CIT2 deletion had no effect on the β-amyrin production. Compared with the control strain, the production of β-amyrin was increased by 1.85 times after deleting MLS1, reaching into 3.3 mg·L~(-1). By replacing the promoter of PGI1, the β-amyrin yield was 3.75 times higher than that of the control strain, reaching up to 6.7 mg·L~(-1). This study successfully knocked out the CITT2 and MLS1 genes and weakened the PGI1 gene by using CRISPR/CAS9, which directly influenced the production of β-amyrin and provided some reference for the the metabolic engineering of triterpernoid producing strain.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Saccharomyces cerevisiae
/
Ethanol
/
Fermentation
/
Metabolic Engineering
/
Genetics
Language:
Chinese
Journal:
China Journal of Chinese Materia Medica
Year:
2020
Type:
Article
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