title: Characterization and regulation of the 2,3-butanediol pathway in Serratia marcescens.
abstract: Serratia marcescens has been proved to be a potential strain for industrial 2,3-butanediol production for its high yield, productivity, and other advantages. In this study, the genes slaA, slaB, slaC, and slaR were successfully cloned which were further confirmed to be encoding acetolactate decarboxylase, acetolactate synthase, 2,3-butanediol dehydrogenase, and a LysR-like regulator, respectively. Unlike in Klebsiella sp. or Klebsiella pneumonie and Vibrio sp. or Vibrio cholerae, the gene slaC is separated from other genes. Then it showed that two regulators, SwrR and SlaR, are in charge of this process by exerting effect on the transcription of genes slaA and slaB. By contrast, the expression of gene slaC is unaffected by the two regulators. It means that these two regulators affect the production of 2,3-butanediol by regulating the production of acetoin. Based on these findings, we successfully accelerated the 2,3-butanediol production by inactivation of gene swrR. The obtained results and further investigations should lead to a more suitable fermentation strategy and strain improvement which would be applicable to the industrial production of 2,3-butanediol.
authors: State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai, 200237, People's Republic of China.
authors: Ben
authors: B
authors: Rao
authors: Liao Yuan
authors: LY
authors: Zhang
authors: Jian'an
authors: J
authors: Sun
authors: Gang
authors: G
authors: Su
authors: Dongzhi
authors: D
authors: Wei
authors: Ju
authors: J
authors: Chu
authors: Jiawen
authors: J
authors: Zhu
authors: Yaling
authors: Y
authors: Shen
mesh_terms: D000095:Acetolactate Synthase / Q000235:genetics; D000429:Alcohol Oxidoreductases / Q000235:genetics; D001426:Bacterial Proteins / Q000235:genetics; D002072:Butylene Glycols / Q000378:metabolism*; D002262:Carboxy-Lyases / Q000235:genetics; D003001:Cloning, Molecular; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D015964:Gene Expression Regulation, Bacterial; D053858:Metabolic Networks and Pathways / Q000235:genetics*; D008969:Molecular Sequence Data; D017422:Sequence Analysis, DNA; D012706:Serratia marcescens / Q000235:genetics* / Q000378:metabolism*; D014157:Transcription Factors / Q000235:genetics
chemical_list: D001426:Bacterial Proteins; D002072:Butylene Glycols; D004269:DNA, Bacterial; D014157:Transcription Factors; C026978:2,3-butylene glycol; D000429:Alcohol Oxidoreductases; C019801:butanediol dehydrogenase; D000095:Acetolactate Synthase; D002262:Carboxy-Lyases; C023746:acetolactate decarboxylase