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Published on: June 29, 2017
[Progress in microbial production of alpha-ketoglutarate].
Hongwei Guo1, Guocheng Du, Jingwen Zhou
1Key Laboratory of Industrial Biotechnology of Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.
Summary
This study reviews microbial fermentation for alpha-ketoglutarate (AKG) production. Research shows thiamine deficiency and nitrogen starvation enhance AKG accumulation, with optimization via fermentation control and metabolic engineering.
Area of Science:
- Biochemistry
- Metabolic Engineering
- Microbial Biotechnology
Background:
- Alpha-ketoglutarate (AKG) is a crucial intermediate in the tricarboxylic acid (TCA) cycle.
- AKG links carbon and nitrogen metabolism, making it vital for cellular processes.
Purpose of the Study:
- To review recent advancements in microbial fermentation for AKG production.
- To highlight key factors influencing AKG accumulation and strategies for optimization.
Main Methods:
- Screening of diverse prokaryotic and eukaryotic microbes for AKG accumulation.
- Physiological characterization of AKG over-accumulation triggers (thiamine defect, nitrogen starvation).
- Fermentation process optimization (pH, dissolved oxygen, cofactors) and metabolic engineering approaches.
Main Results:
- Identification of microbial strains capable of AKG accumulation.
- Understanding the physiological basis for AKG over-production.
- Demonstration of fermentation control and metabolic engineering strategies for enhanced AKG yields.
Conclusions:
- Microbial fermentation offers a promising route for AKG production.
- Further research is needed to overcome current limitations and advance industrial applications.
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