A method for producing PHB by fermentation of Corynebacterium glutamicum
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-10-19
- Publication Date
- 2026-03-13
AI Technical Summary
Existing Corynebacterium glutamicum strains used as PHB-producing strains suffer from genetic instability and insufficient yield, making it difficult to effectively modify them by expressing PHB synthesis-related genes via plasmids.
The PHB synthesis genes PhaA, PhaB, and PhaC were integrated into the genome of Corynebacterium glutamicum via gene integration. The carbon-nitrogen ratio, pH value, and feeding strategy during fermentation were optimized, including controlling the carbon-nitrogen ratio at (17–53):1, preferably (23–24):1, the fermentation temperature at 20–40℃, the stirring speed at 400–800 rpm, the aeration rate at 0.3–3.0 vvm, the gradual addition of nitrogen sources such as ammonium sulfate during fermentation, and monitoring and controlling the pH value at 6.0–8.0.
It significantly increased the PHB yield of Corynebacterium glutamicum, achieving stable and efficient production.
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Abstract
Citation Information
Patent Citations
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