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Production of medium chain length polyhydroxyalkanoate from acetate by engineered Pseudomonas putida KT2440
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Production of medium chain length polyhydroxyalkanoate from acetate by engineered Pseudomonas putida KT2440
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Production of medium chain length polyhydroxyalkanoate from acetate by engineered Pseudomonas putida KT2440
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Journal Article
Production of medium chain length polyhydroxyalkanoate from acetate by engineered Pseudomonas putida KT2440
2019
Overview
Abstract
Pseudomonas putida was metabolically engineered to produce medium chain length polyhydroxyalkanoate (mcl-PHA) from acetate, a promising carbon source to achieve cost-effective microbial processes. As acetate is known to be harmful to cell growth, P. putida KT2440 was screened from three Pseudomonas strains (P. putida KT2440, P. putida NBRC14164, and P. aeruginosa PH1) as the host with the highest tolerance to 10 g/L of acetate in the medium. Subsequently, P. putida KT2440 was engineered by amplifying the acetate assimilation pathway, including overexpression of the acs (encoding acetyl-CoA synthetase) route and construction of the ackA-pta (encoding acetate kinase-phosphotransacetylase) pathway. The acs overexpressing P. putida KT2440 showed a remarkable increase of mcl-PHA titer (+ 92%), mcl-PHA yield (+ 50%), and cellular mcl-PHA content (+ 43%) compared with the wild-type P. putida KT2440, which indicated that acetate could be a potential substrate for biochemical production of mcl-PHA by engineered P. putida.
Publisher
Oxford University Press,Springer International Publishing
Subject
/ acetates
/ Bacterial Proteins - metabolism
/ Batch Cell Culture Techniques
/ Biomedical and Life Sciences
/ Carbon
/ Cell Culture and Bioengineering - Original Paper
/ Chains
/ Coding
/ Genes
/ Metabolic Engineering - methods
/ Plasmids
/ Polyhydroxyalkanoates - biosynthesis
/ Pseudomonas putida - growth & development
