摘要:
An L-amino acid is produced by culturing a microorganism belonging to the family Enterobacteriaceae , having an L-amino acid-producing ability and modified to increase glycerol dehydrogenase and dihydroxyacetone kinase activities, in a medium containing glycerol as a carbon source to produce and accumulate an L-amino acid in the medium or cells, and collecting the L-amino acid from the medium or the cells.
摘要:
A method for efficiently producing an L-amino acid utilizing a bacterium belonging to the family Enterobacteriaceae from a fatty acid or an alcohol such as glycerol as a raw material is provided. A bacterium belonging to the family Enterobacteriaceae, having an L-amino acid-producing ability, and harboring a mutant RpsA protein having a mutation that the aspartic acid residue at position 210 is replaced with another amino acid residue is cultured in a medium containing a carbon source selected from a fatty acid and an alcohol, and an L-amino acid is collected from the medium thereby to produce the L-amino acid.
摘要:
A method for producing an L-amino acid which comprisese culturing a bacterium belonging to the family Enterobacteriaceae and having an L-amino acid producing ability in a medium to produce and accumulate an L-amino acid in the medium and collecting the L-amino acid from the medium, wherein the bacterium has been modified so that activity or activities of one or two or more kinds of enzymes of the arginine succinyltransferase pathway, such as arginine succinyltransferase, succinylarginine dihydrolase, succinylornithine aminotransferase, succinylglutamate-semialdehyde dehydrogenase and succinylglutamate desuccinylase, is/are decreased.
摘要:
A bacterium which belongs to the Enterobacteriaceae family, has an ability to produce an L-amino acid selected from L-glutamic acid, L-arginine and L-threonine, and is modified so that the activity of a protein encoded by ydcl gene is decreased is cultuerd in a culture medium, thereby producing and accumulating the L-amino acid selected from L-glutamic acid, L-arginine and L-threonine in the culture medium or cells of the bacterium. Subsequently, the L-amino acid is collected from the culture medium or the cells.
摘要:
An organic acid is produced by allowing a bacterium which has an ability to produce an organic acid and has been modified so that expression of yidE gene is enhanced or a product obtained by processing the bacterium to act on an organic raw material in a reaction mixture containing carbonate ions, bicarbonate ions, or carbon dioxide gas to produce the organic acid, and collecting the organic acid.
摘要:
A method for producing an L-amino acid is described, for example L-threonine, L-lysine, L-histidine, L-phenylalanine, L-arginine, L-tryptophan, or L-glutamic acid, using a bacterium of the Enterobacteriaceae family, wherein the bacterium has been modified to enhance an activity of a wild-type alcohol dehydrogenase encoded by the adhE gene or a mutant alcohol dehydrogenase which is resistant to aerobic inactivation.
摘要:
A method for producing a protein is provided. An objective protein is produced by culturing Talaromyces cellulolyticus having an objective protein-producing ability, which has been modified so that the activity of a Pep4 protein is reduced, in a culture medium.