摘要:
The invention relates to a method for producing L-valine and to a suitable microorganism. The inventive method is characterized by preferably enhancing the transaminase C activity of a coryneform bacterium, especially Corynebacterium glutamicum. The organisms so modified have a yield in L-valine which is 35.8% higher than that of non-modified organisms.
摘要:
The invention relates to recombinant microorganisms in which polynucleotides which code for lysine decarboxylase are enhanced and, using which, cadaverine (1,5-diaminopentane) is produced fermentatively, with the carbon source used preferably being renewable raw materials such as, for example, glucose, sucrose, molasses and the like.
摘要:
The present invention relates to a process for the microbial production of L-valine in which the dihydroxy acid-synthase (ilvD) activity and/or the ilvD gene expression is intensified in a microorganism. As an alternative or in combination with this, the acetohydroxy acid-synthase (ilvBN) activity and isomeroreductase (ilvC) activity and/or the ilvBNC gene expression are intensified in a microorganism. The process according to the invention preferably makes use of microorganisms in which the activity of at least one enzyme that is involved in a metabolic pathway that reduces the formation of L-valine is weakened or eliminated. Thus, for instance, the process according to the invention preferably makes use of microorganisms having a defect mutation in the threonine dehydratase (ilvA) gene and/or a defect mutation in one or more genes of the pantothenate synthesis.
摘要:
This invention relates to the nucleotide sequence of coryneform bacteria coding for proteins which are involved in L-serine metabolism with reduced and switched off L-serine dehydratase activity. The invention also relates to microorganisms used in methods for producing L-serine.
摘要:
A pyruvate carboxylase gene having SEQ ID NO:1 as well as an amino acid sequence having SEQ ID NO:2 expressed by the pyruvate carboxylate gene are disclosed. Also disclosed is a method for microbial production of amino acids of the aspartate and/or glutamate family in which the pyruvate carboxylase activity is increased by genetically changing the pyruvate carboxylase gene having SEQ ID NO:1 through expression of a microorganism which produces the corresponding amino acid having SEQ ID NO:2.
摘要翻译:公开了具有SEQ ID NO:1的丙酮酸羧化酶基因以及由丙酮酸羧酸酯基因表达的具有SEQ ID NO:2的氨基酸序列。 还公开了一种微生物生产天冬氨酸和/或谷氨酸家族的氨基酸的方法,其中丙酮酸羧化酶活性通过遗传改变具有SEQ ID NO:1的丙酮酸羧化酶基因而增加,通过表达产生相应氨基的微生物 具有SEQ ID NO:2的酸。
摘要:
The invention relates to the nucleotide sequences of coryneform bacteria coding for proteins which are involved in L-serine metabolism with reduced and switched off L-serine dehydratase. Said invention also relates to micro-organisms and to methods for producing L-serine.
摘要:
The invention relates to a process for the preparation of L-amino acids. The process involves fermenting an L-amino acid producing coryneform bacteria in a culture medium, concentrating L-amino acid in the culture medium or in the cells of the bacteria, and isolating the L-amino acid produced. The bacteria has an amplified gene encoding the Zwischenferment protein.
摘要:
L-amino acid is produced by fermenting a medium using coryneform bacteria in which one or more of the genes linked with a nitrogen metabolism and selected from the group consisting of amt, ocd, soxA and sumT is/are amplified.
摘要:
The present invention relates to polynucleotides corresponding to the plsC gene and which encode 1-acyl-SN-glycerol-3-phosphate acyltransferase, methods of producing L-amino acids, and methods of screening for polynucleotides which encode proteins having 1-acyl-SN-glycerol-3-phosphate acyltransferase activity.
摘要:
The invention relates to a genetically modified coryneform bacterium, the cma gene of which is amplified, and an isolated polynucleotide which codes for cyclopropane-mycolic acid synthase from coryneform bacteria, and also a method for the fermentative preparation of L-amino acids with amplification of the cma gene in the bacteria and the use of the polynucleotide as a primer or hydridization probe.