Abstract:
The present invention relates to genetically modified microorganisms, in particular coryneform bacteria and Escherichia coli, in which the phosphorylation state of proteins or polypeptides has been changed such that the bacteria produce a larger amount of a desired fine chemical or a metabolite than the wild type, and to a method for the production of fine chemicals or metabolites.
Abstract:
The invention relates to a fermentation process for the preparation of L-amino acids, especially L-threonine, in which the following steps are carried out: a) fermentation of the microorganisms of the family Enterobacteriaceae producing the desired L-amino acid, in which microorganisms at least the pckA gene and/or the open reading frames yjfA and ytfP are, individually or jointly, attenuated and, in particular, switched off, b) enrichment of the L-amino acid in the medium or in the bacterial cells, and c) isolation of the L-amino acid.
Abstract:
The invention provides an improved process for the fermentative preparation of L-threonine using L-threonine-producing bacteria from the family Enterobacteriaceae.
Abstract:
The invention provides a process for the enzymatic production of D-pantothenic acid and/or its salts or feedstuffs additives containing the latter by fermentation of microorganisms of the family Enterobacteriaceae, in particular those that already produce D-pantothenic acid, wherein the nucleotide sequence(s) coding for the serC gene is/are enhanced, in particular overexpressed, in the microorganisms.
Abstract:
The invention relates to a process for the preparation of L-amino acids, in particular L-threonine, in which the following steps are carried out: a) fermentation of microorganisms of the Enterobacteriaceae family which produce the desired L-amino acid and in which the aspA gene, or the nucleotide sequence which codes for this, is attenuated, in particular eliminated, b) concentration of the L-amino acid in the medium or in the cells of the bacteria, and c) isolation of the L-amino acid.
Abstract:
The invention relates to a process for the preparation of L-amino acids, in particular L-threonine, in which the following steps are carried out: a) fermentation of microorganisms of the Enterobacteriaceae family which produce the desired L-amino acid and in which the aceK gene, or the nucleotide sequence which codes for this, is attenuated, in particular eliminated, b) concentration of the L-amino acid in the medium or in the cells of the bacteria, and c) isolation of the L-amino acid.
Abstract:
The invention relates to a process for the preparation of L-amino acids, in particular L-threonine, in which the following steps are carried out: a) fermentation of microorganisms of the Enterobacteriaceae family which produce the desired L-amino acid and in which the aceB gene, or the nucleotide sequence which codes for this, is attenuated, in particular eliminated, b) concentration of the L-amino acid in the medium or in the cells of the bacteria, and c) isolation of the L-amino acid.
Abstract:
The invention relates to a process for the preparation of L-amino acids, wherein the following steps are implemented: a) fermentation of the coryneform bacteria producing the desired L-amino acid, in which at least the fda gene is attenuated, b) enrichment of the desired L-amino acid in the medium or in the cells of the bacteria, and c) isolation of the L-amino acid, and optionally bacteria are employed in which, in addition, further genes of the biosynthetic pathway of the desired L-amino acid are enhanced, or bacteria are employed in which the metabolic pathways that diminish the formation of the desired L-amino acid are at least partly switched off.
Abstract:
The invention relates to an isolated polynucleotide comprising a polynucleotide sequence chosen from the group consisting of a) polynucleotide which is identical to the extent of at least 70% to a polynucleotide which codes for a polypeptide which comprises the amino acid sequence of SEQ ID No. 2, b) polynucleotide which codes for a polypeptide which comprises an amino acid sequence which is identical to the extent of at least 70% to the amino acid sequence of SEQ ID No. 2, c) polynucleotide which is complementary to the polynucleotides of a) or b), and d) polynucleotide comprising at least 15 successive nucleotides of the polynucleotide sequence of a), b) or c), and a process for the fermentative preparation of L-amino acids using coryneform bacteria in which at least the sigE gene is present in enhanced form, and the use of polynucleotides which comprise the sequences according to the invention as hybridization probes.
Abstract translation:本发明涉及一种分离的多核苷酸,其包含多核苷酸序列,所述多核苷酸序列选自a)多核苷酸,其与编码多肽的多核苷酸的程度相同,所述多核苷酸包含SEQ ID No的氨基酸序列 2,b)编码多肽的多核苷酸,其包含与至少70%与SEQ ID No.2的氨基酸序列相同程度的氨基酸序列,c)多核苷酸,其与 )或b),和d)包含a),b)或c)的多核苷酸序列的至少15个连续核苷酸的多核苷酸,以及使用棒状细菌发酵制备L-氨基酸的方法,其中至少sigE 基因以增强形式存在,并且使用包含根据本发明的序列的多核苷酸作为杂交探针。