摘要:
An L-amino acid can be produced by: culturing a bacterium which belongs to the Enterobacteriaceae family, is increased in the ability to utilize a fatty acid, and is capable of producing the L-amino acid in a culture medium containing a fatty acid or a hydrolysate of an oil-and-fat as a carbon source, thereby producing and accumulating the L-amino acid in a culture; and collecting the L-amino acid from the culture.
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:
In a method for producing an L-amino acid comprising culturing a bacterium which belongs to the family Enterobacteriaceae and has an L-amino acid-producing ability in a medium containing a carbon source selected from a fatty acid and an alcohol, and collecting the L-amino acid from the medium, a bacterium which has been subjected to a modification selected from the group consisting of enhancement of oxyS gene expression, enhancement of fixABC gene expression, and combination thereof is used as the bacterium, or a substance that reduces intracellular hydrogen peroxide concentration of the bacterium is added to the medium.
摘要:
L-Lysine is produced by culturing an Escherichia coli having an L-lysine-producing ability, which has been modified to decrease activity or activities of one or more enzymes of the meso-α,ε-diaminopimelic acid synthesis pathway, for example, 2,3,4,5-tetrahydropyridine-2,6-dicarboxylate N-succinyltransferase, succinyldiaminopimelate transaminase, succinyldiaminopimelate desuccinylase, and diaminopimelate epimerase, and into which a gene coding for diaminopimelate dehydrogenase has been introduced, in a medium, and collecting L-lysine from the medium.
摘要:
A method for producing an L-amino acid is provided. An L-amino acid is produced by culturing a bacterium belonging to the family Enterobacteriaceae and having an L-amino acid-producing ability, which has been modified so that the activity of aconitase is increased, or the activities of aconitase and acetaldehyde dehydrogenase are increased, in a medium, and collecting the L-amino acid from the medium or cells of the bacterium.