Abstract:
The present invention relates to a method of producing methionine in Coryneform bacteria in which enzymes of the pentose phosphate pathway are over - expressed. The present invention also relates to Coryneform bacteria for producing methionine in which at least two enzymes of the pentose phosphate pathway are over - expressed.
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 present invention features improved processes and organisms for the production of methionine. The invention demonstrates that a ΔmetF organism or a ΔmetE 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/MetΕ 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 ΔmetF ΔmetB 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:
Die vorliegende Erfindung betrifft die Verwendung von Nukleinsäuresequenzen zur Regulation der Transkription und Expression von Genen, die neuen Promotoren und Expressionseinheiten selbst, Verfahren zur Veränderung oder Verursachung der Transkriptionsrate und/oder Expressionsrate von Genen, Expressionskasetten, enthaltend die Expressionseinheiten, genetisch veränderte Mikroorganismen mit veränderter oder verursachter Trankriptionsrate und/oder Expressionsrate sowie Verfahren zur Herstellung von biosynthetischen Produkten durch Kultivierung der genetisch veränderten Mikroorganismen.
Abstract:
The invention relates to a method for producing an amino acid comprising culturing a microorganism of the genus Corynebacterium or Brevibacterium wherein said microorganism is partially or completely deficient in at least one of the gene loci of the the group which is formed by otsAB, treZ and treS, and subsequent isolation of the amino acid from the culture medium.
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:
Die Erfindung betrifft Verfahren zur fermentativen Herstellung von schwefelhaltigen Feinchemikalien, insbesondere L-Methionin, unter Verwendung von Bakterien, in denen eine für ein Methionin-Synthase (metH)-Gen kodierende Nukleotidsequenz exprimiert wird.