Abstract: The present invention provides a method for producing a target substance, the biosynthetic pathway of which is ATP-dependent, for example, amino acids, nucleosides, nucleotides, isoprenoids, and peptides, by fermentation of a bacterium which has been modified to overexpress a gene encoding a protein having H+-translocating membrane-bound pyrophosphatase activity, for example, the hppA gene native to R. rubrum or a variant thereof.

Abstract: The present invention provides a method for producing a target substance, the biosynthetic pathway of which is ATP-dependent, such as, for example, amino acids, nucleosides, nucleotides, isoprenoids, and peptides, by fermentation of a bacterium which has been modified to overexpress a gene encoding a protein having H+-translocating membrane-bound pyrophosphatase activity, such as, for example, the hppA gene native to R. rubrum or a variant thereof.

Abstract: A bacterium belonging to the genus Escherichia which has an ability to produce an L-amino acid, wherein the ability to produce the L-amino acid is increased by increasing expression of an L-amino acid excretion protein is described. A method for producing the L-amino acid using the bacterium is also described.

Abstract: A bacterium belonging to the genus Escherichia which has an ability to produce an L-amino acid, wherein the ability to produce the L-amino acid is increased by increasing expression of an L-amino acid excretion protein is described. A method for producing the L-amino acid using the bacterium is also described.

Abstract: A bacterium which has an ability to produce an amino acid and in which a novel rhtB gene encodes a protein having an activity of making a bacterium having the protein L-homoserine-resistant is enhanced, is cultivated in a culture medium to produce and cause accumulation of the amino acid in the medium, and the amino acid is recovered from the medium.

Abstract: A bacterium which has an ability to produce an amino acid and in which a novel rhtB gene encodes a protein having an activity of making a bacterium having the protein L-homoserine-resistant is enhanced, is cultivated in a culture medium to produce and cause accumulation of the amino acid in the medium, and the amino acid is recovered from the medium.

Abstract: The present invention describes a bacterium which has an ability to produce an amino acid and in which the rhtC gene encoding a protein having an enhanced activity of imparting L-threonine resistance to a bacterium expressing the protein. Preferably, the bacterium further includes an rhtB gene encoding for a protein having an enhanced activity of imparting to a bacterium L-homoserine resistance expressing the protein. The present invention also describes a method of cultivating the bacterium in a culture medium to produce and accumulate amino acids in the medium, and the amino acid is recovered from the medium.

Abstract: A bacterium belonging to the genus Escherichia which has an ability to produce an L-amino acid, wherein the ability to produce the L-amino acid is increased by increasing expression of an L-amino acid excretion protein is described. A method for producing the L-amino acid using the bacterium is also described.