Ajinomoto Co., Ltd.

Yuji Joe

Takuji Ueda

Hisao Ito

Yoshiya Gunji

Yuta Nakai

Rie Takikawa

Ranko Nishi

Saori Kataoka

Atsuko Takai

Chie Koseki

Yuuta Nakai

L-amino acids are produced by culturing a microorganism which has an ability to produce the L-amino acid, but has been modified so that expression of the ybjE gene has been enhanced. The L-amino acid is collected from the culture medium or from the microorganism.

L-amino acid-producing microorganism and method for producing L-amino acid

A method for producing an L-amino acid is provided which includes culturing in a medium a microorganism of the Enterobacteriaceae family which has an ability to produce an L-amino acid and which has been modified so as to enhance the &#x3b2;-glucoside PTS activity, and collecting the L-amino acid from the medium or cells.

L-amino acid-producing bacterium and a method for producing L-amino acids

A method for producing an L-amino acid is provided which includes culturing in a medium a microorganism of the Enterobacteriaceae family which has an ability to produce an L-amino acid and which has been modified so as to enhance the mannose PTS activity, accumulating the L-amino acid in the medium or in cells, and collecting the L-amino acid from the medium or cells.

An L-amino acid is produced by culturing an L-amino acid-producing bacterium which belongs to the Enterobacteriaceae family and which has been modified so that the acetyl-CoA synthetase activity is increased.

Method for producing L-amino acid

The present invention describes the production of L-tyrosine by culturing in a medium anbacterium which has L-tyrosine-producing ability and which carries a mutant prephenate dehydrogenase which is desensitized to feedback inhibition by L-tyrosine, producing and accumulating L-tyrosine in the medium or in the bacterial cells, and collecting L-tyrosine from the medium or the bacterial cells.

L-tyrosine producing bacterium and a method for producing L-tyrosine

An L-amino acid producing bacterium of the Enterobacteriaceae family is described, wherein the bacterium has been modified so as to not produce type I fimbrial adhesin protein is cultured in a medium to produce and excrete said L-amino acid in the medium, and collecting said L-amino acid from the medium.

L-amino acid producing microorganism which has been modified to inactive the fimH gene, and a method for producing I-amino acid

L-tyrosine-producing bacterium and a method for producing L-tyrosine

An L-amino acid-producing strain ofis bred by modifying anK12 strain or a derivative thereof so as to become resistant to L-valine and have an ability to produce one or more L-amino acids selected from the group consisting of L-tryptophan, L-phenylalanine, L-lysine, L-tyrosine, L-glutamic acid, L-histidine, L-cysteine, and L-proline.

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Kawasaki, Japan

Yuji Joe