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Metabolic Engineering of Bacillus licheniformis for Production of Acetoin.


ABSTRACT: Acetoin is a potential platform compound for a variety of chemicals. Bacillus licheniformis MW3, a thermophilic and generally regarded as safe (GRAS) microorganism, can produce 2,3-butanediol with a high concentration, yield, and productivity. In this study, B. licheniformis MW3 was metabolic engineered for acetoin production. After deleting two 2,3-butanediol dehydrogenases encoding genes budC and gdh, an engineered strain B. licheniformis MW3 (?budC?gdh) was constructed. Using fed-batch fermentation of B. licheniformis MW3 (?budC?gdh), 64.2 g/L acetoin was produced at a productivity of 2.378 g/[L h] and a yield of 0.412 g/g from 156 g/L glucose in 27 h. The fermentation process exhibited rather high productivity and yield of acetoin, indicating that B. licheniformis MW3 (?budC?gdh) might be a promising acetoin producer.

SUBMITTER: Lu C 

PROVIDER: S-EPMC7047894 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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Metabolic Engineering of <i>Bacillus licheniformis</i> for Production of Acetoin.

Lü Chuanjuan C   Ge Yongsheng Y   Cao Menghao M   Guo Xiaoting X   Liu Peihai P   Gao Chao C   Xu Ping P   Ma Cuiqing C  

Frontiers in bioengineering and biotechnology 20200221


Acetoin is a potential platform compound for a variety of chemicals. <i>Bacillus licheniformis</i> MW3, a thermophilic and generally regarded as safe (GRAS) microorganism, can produce 2,3-butanediol with a high concentration, yield, and productivity. In this study, <i>B. licheniformis</i> MW3 was metabolic engineered for acetoin production. After deleting two 2,3-butanediol dehydrogenases encoding genes <i>budC</i> and <i>gdh</i>, an engineered strain <i>B. licheniformis</i> MW3 (Δ<i>budC</i>Δ<i  ...[more]

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