Abstract: The invention provides a microorganism belonging to Enterobacteriaceae in which a function of CsrC RNA has been decreased or lost, and which has the ability to produce and accumulate an amino acid, and a process in which the microorganism is cultured in a medium to produce and accumulate the amino acid in the culture, and the amino acid is recovered from the culture.

Abstract: A process for producing a useful substance using microorganisms, and an object thereof to provide a method that shortens the culturing period of the microorganisms and improves the productivity of the useful substance. The speed at which microorganisms consume carbohydrates and/or hydrocarbon oxidation products can be increased and the productivity of a target useful substance can be improved by using a main culture initial medium in which the total concentration of carbohydrate and hydrocarbon oxidation product is less than 0.4% by weight in terms of the carbon equivalent.

Abstract: According to the present invention, there are provided a microorganism belonging to Enterobacteriaceae wherein a function of CsrB RNA or CsrC RNA has been decreased or lost, and which has the ability to produce and accumulate an amino acid, and a process wherein the microorganism is cultured in a medium to produce and accumulate the amino acid in the culture, and the amino acid is recovered from the culture.

Abstract: The present invention provides a protein having ?1,2-fucosyltransferase activity, a DNA encoding the protein, a recombinant DNA comprising the DNA, a transformant comprising the recombinant DNA, a process for producing the protein having ?1,2-fucosyltransferase activity using the transformant, and a process for producing a fucose-containing complex carbohydrate using the transformant.

Abstract: Attempts are made to provide a novel transaldolase gene; a polypeptide encoded by this gene; a recombinant DNA obtained by integrating this gene; a microorganism carrying this recombinant DNA; and a process for producing an aromatic amino acid, an aromatic vitamin, L-histidine, riboflavin, a nucleic acid, a nucleic acid-associated substance, a novel saccharide, etc. by using the above microorganism. As the results of extensive studies, a novel transaldolase gene is isolated from chromosomal DNA of a microorganism belonging to the genus Corynebacterium as a DNA fragment complementary to the requirement for shikimic acid of a transketolase defective variant obtained as a variant with the requirement for shikimic acid belonging to the genus Corynebacterium. Further, a recombinant DNA containing this gene is constructed and transferred into a host microorganism, thereby achieving the objects as described above.

Abstract: The present invention relates to a novel transaldolase gene, and to a polypeptide encoded by the gene, a recombinant DNA obtained by ligating the gene, a transformant carrying the recombinant DNA, and a process for producing the polypeptide, aromatic amino acids, aromatic vitamins, L-histidine, riboflavin, nucleic acids, nucleic acid-associated substances, novel saccharides and others by utilizing the transformant.

Abstract: The present invention provides a protein having &agr;1,2-fucosyltransferase activity, a DNA encoding the protein, a recombinant DNA comprising the DNA, a transformant comprising the recombinant DNA, a process for producing the protein having &agr;1,2-fucosyltransferase activity using the transformant, and a process for producing a fucose-containing complex carbohydrate using the transformant.

Abstract: An industrially more advantageous method for the production of metabolites biologically synthesized via phosphoribosyl pyrophosphate (PRPP) is provided, making use of metabolically modified strains in which transketolase activity is deficient or reduced in comparison with the parent strain.