Dataset Information


Engineering a Microbial Consortium Based Whole-Cell System for Efficient Production of Glutarate From L-Lysine.

ABSTRACT: Glutarate is an important C5 platform chemical produced during the catabolism of L-lysine through 5-aminovalerate (5-AMV) pathway. Here, we first established a whole-cell biocatalysis system for the glutarate production from L-lysine with the engineered Escherichia coli (E. coli) that co-expressed DavAB and GabDT. However, the accumulation of intermediate 5-AMV was identified as one important factor limiting glutarate production. Meanwhile, the negative interaction of co-expressing DavAB and GabDT in a single cell was also confirmed. Here, we solved these problems through engineering a microbial consortium composed of two engineered E. coli strains, BL21-22AB and BL21-YDT, as the whole-cell biocatalysts, each of which contains a part of the glutarate pathway. After the optimization of bioconversion conditions, including temperature, metal ion additives, pH, and cell ratio, 17.2 g/L glutarate was obtained from 20 g/L L-lysine with a yield of 95.1%, which was improved by 19.2% compared with that in a single cell. Little accumulation of 5-AMV was detected. Even at the high substrate concentration, the reduced 5-AMV accumulation and increased glutarate production were achieved. This synthetic consortium produced 43.8 g/L glutarate via a fed-batch strategy, the highest titer reported to date.


PROVIDER: S-EPMC6400078 | BioStudies | 2019-01-01

REPOSITORIES: biostudies

Similar Datasets

2019-01-01 | S-EPMC6659618 | BioStudies
2018-01-01 | S-EPMC6265302 | BioStudies
2018-11-20 | GSE117175 | GEO
1000-01-01 | S-EPMC4980613 | BioStudies
2014-01-01 | S-EPMC4093655 | BioStudies
2018-01-01 | S-EPMC6070760 | BioStudies
2019-01-01 | S-EPMC7132994 | BioStudies
2018-01-01 | S-EPMC6218589 | BioStudies
1000-01-01 | S-EPMC5974017 | BioStudies
1972-01-01 | S-EPMC1178505 | BioStudies