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Updated: Feb 15, 2026

Light-Controlled Fermentations for Microbial Chemical and Protein Production
Published on: March 22, 2022
Temperature gradient-based high-cell density fed-batch fermentation for the production of pyruvate oxidase by
Jianguang Liang1, Jie Zhao2, Zejian Wang2
1a School of Biology and Food Engineering , Changshu Institute of Technology , Changshu , PR China.
Abstract:
Pyruvate oxidase (PyOD) is a very powerful enzyme for clinical diagnostic applications and environmental monitoring. Influences of temperature on cell growth, plasmid stability, and PyOD expression during the PyOD fermentation process by recombinant Escherichia coli were investigated. Based on the influences of temperature on the physiological metabolism, a novel high-cell density fed-batch cultivation with gradient temperature decrease strategy for effective PyOD production was achieved, under which the biomass (OD600) of recombinant E. coli could reach to 71 and the highest PyOD activity in broth could reach to 3,307 U/L in 26 hr fermentation.
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