Process for producing L-amino acids
AssigneeAjinomoto Co., Inc.
InventorsHiroko Kishino, Masako Izui, Yukiko Ono, Hisao Ito, Osamu Kurahashi
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Abstract
A microorganism, which has an ability to produce L-amino acid, especially L-phenylalanine, L-tryptophane, L-tyrosine, L-threonine, or L-isoleucine, in which a phosphoenolpyruvate-producing ability is enhanced, is cultivated in a medium so that the L-amino acid is produced and accumulated in the medium to collect the L-amino acid.
Claims6
A method for producing L-amino acid comprising cultivating in a medium a recombinant microorganism having an enhanced L-amino acid-producing ability, producing and accumulating the L-amino acid in the medium, and collecting the L-amino acid, wherein said amino acid is L-threonine or L-isoleucine, and wherein the said recombinant microorganism transformed with a gene encoding phosphoenolpyruvate synthase and a threonine operon comprising a gene coding for aspartokinase desensitized for feedback inhibition by L-threonine.
Dependencies are inferred from the claim text.