Abstract:
The present invention features methods of increasing the production of a fine chemical, e.g., lysine from a microorganism, e.g., Corynebacterium by way of deregulating an enzyme encoding gene, i.e., lactate dehydrogenase. In a preferred embodiment, the invention provides methods of increasing the production of lysine in Corynebacterium glutamicum by way of the expression of lactate dehydrogenase activity. The invention also provides a novel process for the production of lysine by way of regulating carbon flux towards oxaloacetate (OAA). In a preferred embodiment, the invention provides methods for the production of lysine by way of utilizing fructose or sucrose as a carbon source.
Abstract:
The invention relates to mutant nucleic acids and proteins from the metabolic pathway of fine chemicals, methods for the production of genetically modified production organisms, methods for the production of fine chemicals by cultivating said genetically modified organisms, and said genetically modified organisms.
Abstract:
The invention relates to methods for the production of sulphur-containing fine chemicals by fermentation, in particular L-methionine, using bacteria in which a nucleotide sequence is expressed which codes for an S-adenosylmethionine synthase (metK) gene.
Abstract:
The invention relates to a plasmid vector which does not replicate in a target organism and contains the following constituents: a) an origin of replication for a host organism which is not identical to the target organism, b) at least one genetic marker, c) optionally a section of a sequence which enables the transfer of DNA by means of conjugation (mob sequence), d) a section of a sequence which is homologous to sequences of the target organism and enables homologous recombination in the target organism, e) a gene for a galactokinase under the control of a promoter.
Abstract:
The present invention relates to microorganisms and processes for the efficient preparation of L-methionine. In particular, the present invention relates to processes in which the amount of serine available for the metabolism of the microorganism is increased.
Abstract:
The present invention features improved processes and organisms for the production of methionine. The invention demonstrates that a ?metF organism or a ?metE AmetH organism, for example, mutants of C. glutamicum or E. coli, can use a methyl capped sulfide source, e.g., dimethyl disulfide (DMDS), as a source of both sulfur and a methyl group, bypassing the need for MetH/Met? and MetF activity and the need to reduce sulfate, for the synthesis of methionine. Also described in this patent are data implicating MetY (also called MetZ) as an enzyme that incorporates a methyl capped sulfide source, e.g., DMDS, into methionine. A ?metF ?metB strain of C. glutamicum can use a methyl capped sulfide source, e.g., DMDS, as a source of both sulfide and a methyl group. Furthermore, methionine production by engineered prototrophic organisms that overproduce O-acetyl-homoserine was improved by the addition of a methyl capped sulfide source, e.g., DMDS.
Abstract:
The present invention concerns methods for the production of microorganisms with increased efficiency for methionine synthesis. The present invention also concerns microorganisms with increased efficiency for methionine synthesis. Furthermore, the present invention concerns methods for determining the optimal metabolic flux for organisms with respect to methionine synthesis.
Abstract:
The invention relates to methods for the zymotic production of fine chemicals, especially L-methionine, containing sulphur using bacteria, wherein a nucleotide sequence coding for a methionine-synthase (metY)-gene is expressed.
Abstract:
The invention relates to novel nucleic acid molecules, the use thereof for the construction of genetically improved micro-organisms and methods for the production of fine chemicals, in particular amino acids by means of said genetically improved micro-organisms.