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Biologically fixation of CO2 has great potential as a significant carbon source for biosynthesis, which is also a major way to reduce CO2 accumulation in atmosphere. Phosphoenolpyruvate (PEP) carboxylation is the key step of anaerobic succinate production in Escherichia coli. In this reaction, one mole CO2 is assimilated with PEP to form oxaloacetate by PEP carboxykinase (PCK). The preferred substrate...
Background Escherichia coli suffer from osmotic stress during succinic acid (SA) production, which reduces the performance of this microbial factory. Results Here, we report that a point mutation leading to a single amino acid change (D654Y) within the β-subunit of DNA-dependent RNA polymerase (RpoB) significantly improved the osmotolerance of E. coli. Importation of the D654Y mutation of RpoB into...
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