摘要:
The present invention relates to a putrescine-producing microorganism and a method for producing putrescine using the same. To be more specific, the present invention is directed to a microorganism given the ability to produce putrescine which is generated by blocking a biosynthetic pathway from ornithine to arginine, increasing the intracellular level of glutamate, enhancing the biosynthetic pathway of ornithine from glutamate, and introducing extracellular ornithine decarboxylase; and a method for producing putrescine by using the microorganism.
摘要:
Disclosed herein are a microorganism strain capable of producing the L-methionine precursor O-acetyl homoserine in high yield and a method of producing O-acetyl homoserine using the same. The microorganism strain is a strain of Escherichia sp. in which an acetyl-CoA synthase gene (acs) and/or a pantothenate kinase gene (coaA) encoding a pantothenate kinase gene refractory to feedback inhibition by CoA is introduced and expressed.
摘要:
An L-threonine-producing Escherichia coli in which a promoter of a phosphoenolpyruvate carboxylase (ppc) gene on the chromosome is substituted with a promoter of a cysteine synthase (cysK) gene and a method of producing L-threonine by using the same are disclosed. The recombinant Escherichia coli may produce L-threonine in a high yield, and thus may be widely used in medical, pharmaceutical, and feed industries, particularly for an animal feed.
摘要:
The present invention relates to a putrescine-producing microorganism and a method for producing putrescine using the same. To be more specific, the present invention is directed to a microorganism given the ability to produce putrescine which is generated by blocking a biosynthetic pathway from ornithine to arginine, increasing the intracellular level of glutamate, enhancing the biosynthetic pathway of ornithine from glutamate, and introducing extracellular ornithine decarboxylase; and a method for producing putrescine by using the microorganism.
摘要:
The present invention relates to a microorganism having an improved ornithine-producing ability, in which the biosynthetic pathway of arginine form ornithine is blocked, the intracellular glutamate level is increased, and the biosynthetic pathway of ornithine from glutamate is enhanced, and a method for producing ornithine using the microorganism.
摘要:
An L-threonine-producing Escherichia coli in which a promoter of a phosphoenolpyruvate carboxylase (ppc) gene on the chromosome is substituted with a promoter of a cysteine synthase (cysK) gene and a method of producing L-threonine by using the same are disclosed. The recombinant Escherichia coli may produce L-threonine in a high yield, and thus may be widely used in medical, pharmaceutical, and feed industries, particularly for an animal feed.
摘要:
The present invention relates to a microorganism having an improved ornithine-producing ability, in which the biosynthetic pathway of arginine form ornithine is blocked, the intracellular glutamate level is increased, and the biosynthetic pathway of ornithine from glutamate is enhanced, and a method for producing ornithine using the microorganism.
摘要:
The present invention provides methods for the production of cysteine or derivates thereof by culturing a microorganism having reduced activity of endogenous phosphoserine phosphatase and the activity of PhnC, PhnD, and PhnE is reduced, and enhanced activity of phosphoglycerate dehydrogenase and/or phosphoserine aminotransferase. The O-phosphoserine produced by such an organism can then be reacted with a sulfide in the presence of a sulfydrylase or a microorganism expressing a sulfhydrylase to produce cysteine or a derivative thereof. Microorganisms having these reduced and enhanced properties noted above are also provided herein.
摘要:
An L-threonine-producing Escherichia coli in which a promoter of a phosphoenolpyruvate carboxylase (ppc) gene on the chromosome is substituted with a promoter of a cysteine synthase (cysK) gene and a method of producing L-threonine by using the same are disclosed. The recombinant Escherichia coli may produce L-threonine in a high yield, and thus may be widely used in medical, pharmaceutical, and feed industries, particularly for an animal feed.
摘要:
The present invention relates to a Vibrio metscnikovii variants, more particularly to a biochemical characteristics of protease which is obtained from Vibrio metscnikovii variant strains such as Vibrio metschnikovii KS1, Vibrio metschnikovii KS1 transformed with pDSBCm, Vibrio metschnikovii KS1 transformed with pSBCm and Vibrio metschnikovii RH530 N-4-8 strain, the mother strain of Vibrio metschnikovii and to a detergent composition including the protease.