Modulation of acetate utilization in Komagataella phaffii by metabolic engineering of tolerance and metabolism
2019
Background
Acetate, an economical industrial chemical, which is also the precursor of acetyl-CoA, could serve as an alternative substrate for biomanufacturing. This nontraditional substrate can be widely produced from syngas via hydrolysis or pyrolysis of the cellulosic biomass, chemical or microbial catalysis, anaerobic fermentation in treated wastewater, etc. However, the toxicity of acetate to microorganisms has held back its utilization, especially for the eukaryotes that are good hosts for production of complicated pharmaceuticals or chemicals. This study seeks to improve acetate utilization in a widely used yeast host, Komagataella phaffii (previously Pichia pastoris), by metabolic engineering of acetate tolerance, transport, and metabolism.
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