Abstract: A method for preparing a nitrogen-containing heterocyclic compound and a derivative thereof by an enzymatic-chemical cascade method, comprising: reacting an alcohol, an amine, an alcohol dehydrogenase, a flavin molecule and a coenzyme in a solvent to obtain the nitrogen-containing heterocyclic compound and the derivative thereof; compared with the prior art, the method is a green and economical enzymatic-chemical cascade method, and is used for synthesizing nitrogen-containing heterocyclic compounds and derivatives thereof; compared with a common toxic chemical catalyst, the alcohol dehydrogenase is selected as a catalyst in the method, which has the characteristics of high substrate specificity, no pollution, high catalytic efficiency, no toxic solvents and simple post-treatment.

Abstract: A method for preparing a nitrogen-containing heterocyclic compound and a derivative thereof by an enzymatic-chemical cascade method, comprising: reacting an alcohol, an amine, an alcohol dehydrogenase, a flavin molecule and a coenzyme in a solvent to obtain the nitrogen-containing heterocyclic compound and the derivative thereof; compared with the prior art, the method is a green and economical enzymatic-chemical cascade method, and is used for synthesizing nitrogen-containing heterocyclic compounds and derivatives thereof; compared with a common toxic chemical catalyst, the alcohol dehydrogenase is selected as a catalyst in the method, which has the characteristics of high substrate specificity, no pollution, high catalytic efficiency, no toxic solvents and simple post-treatment.

Abstract: The invention discloses a recombinant Corynebacterium glutamicum for producing lysine by biofilm continuous fermentation and a construction method thereof, wherein the recombinant Corynebacterium glutamicum is constructed by overexpressing a protease gene FtsH in a Corynebacterium glutamicum; and the construction method comprises the following steps of: (1) performing PCR on a genome of the Corynebacterium glutamicum, and amplifying the FtsH gene to obtain an amplified FtsH gene segment; (2) cloning the FtsH gene segment to an overexpression plasmid to obtain a recombinant plasmid; and (3) introducing the recombinant plasmid into the Corynebacterium glutamicum, and screening to obtain the recombinant Corynebacterium glutamicum.

Abstract: The invention discloses a method for producing lysine by utilizing adsorption and immobilized fermentation of a recombinant Corynebacterium glutamicum, wherein the recombinant Corynebacterium glutamicum is constructed by simultaneously overexpressing an adenosine triphosphate ATPase while knocking out an extracellular nuclease ExeR in a Corynebacterium glutamicum. The recombinant Corynebacterium glutamicum can effectively improve eDNA secretion of the Corynebacterium glutamicum and reduce eDNA degradation of the Corynebacterium glutamicum, so that the Corynebacterium glutamicum can be more easily adsorbed on a surface of a solid carrier for immobilized fermentation, such that a yield of continuous immobilized fermentation of the Corynebacterium glutamicum is increased by 49.67% than that of free fermentation of an original bacterium, and a fermentation cycle is shortened by 29.17%.

Abstract: The invention discloses a recombinant Corynebacterium glutamicum for producing lysine by biofilm continuous fermentation and a construction method thereof, wherein the recombinant Corynebacterium glutamicum is constructed by overexpressing a protease gene FtsH in a Corynebacterium glutamicum; and the construction method comprises the following steps of: (1) performing PCR on a genome of the Corynebacterium glutamicum, and amplifying the FtsH gene to obtain an amplified FtsH gene segment; (2) cloning the FtsH gene segment to an overexpression plasmid to obtain a recombinant plasmid; and (3) introducing the recombinant plasmid into the Corynebacterium glutamicum, and screening to obtain the recombinant Corynebacterium glutamicum.

Abstract: The invention discloses a method for producing lysine by utilizing adsorption and immobilized fermentation of a recombinant Corynebacterium glutamicum, wherein the recombinant Corynebacterium glutamicum is constructed by simultaneously overexpressing an adenosine triphosphate ATPase while knocking out an extracellular nuclease ExeR in a Corynebacterium glutamicum. The recombinant Corynebacterium glutamicum can effectively improve eDNA secretion of the Corynebacterium glutamicum and reduce eDNA degradation of the Corynebacterium glutamicum, so that the Corynebacterium glutamicum can be more easily adsorbed on a surface of a solid carrier for immobilized fermentation, such that a yield of continuous immobilized fermentation of the Corynebacterium glutamicum is increased by 49.67% than that of free fermentation of an original bacterium, and a fermentation cycle is shortened by 29.17%.