Rapid construction of Escherichia coli chassis with genome multi-position integration of isopentenol utilization pathway for efficient and stable terpenoid accumulation.
Biotechnol J
; 18(11): e2300283, 2023 Nov.
Article
in En
| MEDLINE
| ID: mdl-37478165
ABSTRACT
The isopentenol utilization pathway (IUP) is potential in terpenoids synthesis. This study aimed to construct IUP-employed Escherichia coli chassis for stably synthesizing terpenoids. As to effectiveness, promotor engineering strategy was employed to regulate IUP expression level, while ribosome-binding site (RBS) library of the key enzyme was constructed for screening the optimal RBS, followed by optimization of concentration of inducer and substrates, the titer of reporting production, lycopene, from 0.087 to 8.67 mg OD600 -1 . As about stability, the IUP expression cassette was integrated into the genome through transposition tool based on CRISPR-associated transposases. Results showed that the strain with 13 copies produced 1.78-fold lycopene titer that of the controlled strain with IUP-harbored plasmid, and it exhibited stable expression after ten successions while the plasmid loss was observed in the controlled strain in the 3rd succession. This strategy provides valuable information for rapid construction of highly effective and stable chassis employing IUP for terpenoids production.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Terpenes
/
Escherichia coli
Language:
En
Journal:
Biotechnol J
Journal subject:
BIOTECNOLOGIA
Year:
2023
Document type:
Article
Affiliation country: