Abstract:
:In this study, we constructed a coculture consortium comprising engineered Pseudomonas putida KT2440 and Escherichia coli MG1655. Provision of "related" carbon sources and synthesis of medium-chain-length polyhydroxyalkanoates (mcl-PHAs) were separately assigned to these strains via a modular construction strategy. To avoid growth competition, a preference for the use of a carbon source was constructed. Further, the main intermediate metabolite acetate played an important role in constructing the expected "nutrition supply-detoxification" relationship between these strains. The coculture consortium showed a remarkable increase in the mcl-PHA titer (0.541 g/L) with a glucose-xylose mixture (1:1). Subsequently, the titer of mcl-PHA produced by the coculture consortium when tested with actual lignocellulosic hydrolysate (0.434 g/L) was similar to that achieved with laboratory sugars' mixture (0.469 g/L). These results indicate a competitive potential of the engineered E. coli-P. putida coculture consortium for mcl-PHA production with lignocellulosic hydrolysate.
journal_name
J Ind Microbiol Biotechnoljournal_title
Journal of industrial microbiology & biotechnologyauthors
Liu Y,Yang S,Jia Xdoi
10.1007/s10295-020-02267-7subject
Has Abstractpub_date
2020-03-01 00:00:00pages
343-354issue
3eissn
1367-5435issn
1476-5535pii
10.1007/s10295-020-02267-7journal_volume
47pub_type
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journal_title:Journal of industrial microbiology & biotechnology
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