A method for producing an L-amino acid such as L-glutamic acid is provided. An L-amino acid is produced by culturing a bacterium having an L-amino acid-producing ability, which has been modified so that the activity of a C4-dicarboxylic acid-uptake carrier such as DctA, DcuA, and DcuB is increased, in a medium, and collecting the L-amino acid from the medium or cells of the bacterium.

A method for producing an L-amino acid such as L-glutamic acid is provided. An L-amino acid is produced by culturing a bacterium having an L-amino acid-producing ability, which has been modified so that the activity of a C4-dicarboxylic acid-uptake carrier such as DctA, DcuA, and DcuB is increased, in a medium, and collecting the L-amino acid from the medium or cells of the bacterium.

The present invention provides a method for producing L-amino acids by fermentation using a bacterium belonging to the family Enterobacteriaceae which has been modified to overexpress a gene encoding an iron exporter, such as a fetB gene, fetA gene, fieF gene, or a combination of these genes.

The present invention provides a method for producing L-amino acids by fermentation using a bacterium belonging to the family Enterobacteriaceae which has been modified to overexpress a gene encoding an iron exporter, such as a fetB gene, fetA gene, fieF gene, or a combination of these genes.

The present disclosure relates to a microorganism of the genus Escherichia producing more L-tryptophan by inactivating the activity of phosphatase. Additionally, the present disclosure relates to a method for producing L-tryptophan using the microorganism of the genus Escherichia.

The present disclosure relates to a microorganism of the genus Escherichia producing more L-tryptophan by inactivating the activity of phosphatase. Additionally, the present disclosure relates to a method for producing L-tryptophan using the microorganism of the genus Escherichia.

Methods and materials for the biosynthesis of compounds involved in glutamate metabolism, and derivatives and compounds related thereto are provided. Also provided are products produced in accordance with these methods and materials.

Methods and materials for the biosynthesis of compounds involved in glutamate metabolism, and derivatives and compounds related thereto are provided. Also provided are products produced in accordance with these methods and materials.

The present invention relates to application of a novel signal peptide in L-glutamate and its derivatives production from konjac powder, which belongs to the field of gene engineering, enzyme engineering and metabolism engineering. The signal peptide which mediated secretion of -mannanase was invented, and the recombinant strain with this signal peptide had advantages on utilizing konjac powder to produce related products, and its utilization efficiency of konjac powder, production efficiency, and yield were higher than other signal peptides. The recombinant strain possessing this new signal peptide had advantages on utilizing cheaper konjac powder as substrate to lower the process costs on L-glutamic acid and its high-value-added products.

The present invention relates to application of a novel signal peptide in L-glutamate and its derivatives production from konjac powder, which belongs to the field of gene engineering, enzyme engineering and metabolism engineering. The signal peptide which mediated secretion of -mannanase was invented, and the recombinant strain with this signal peptide had advantages on utilizing konjac powder to produce related products, and its utilization efficiency of konjac powder, production efficiency, and yield were higher than other signal peptides. The recombinant strain possessing this new signal peptide had advantages on utilizing cheaper konjac powder as substrate to lower the process costs on L-glutamic acid and its high-value-added products.