RU2000122119A - METHOD FOR PRODUCING L-GLUTAMINE ACID BY FERMENTATION AFTER PAIRING - Google Patents

METHOD FOR PRODUCING L-GLUTAMINE ACID BY FERMENTATION AFTER PAIRING

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Publication number
RU2000122119A
RU2000122119A RU2000122119/13A RU2000122119A RU2000122119A RU 2000122119 A RU2000122119 A RU 2000122119A RU 2000122119/13 A RU2000122119/13 A RU 2000122119/13A RU 2000122119 A RU2000122119 A RU 2000122119A RU 2000122119 A RU2000122119 A RU 2000122119A
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Russia
Prior art keywords
glutamic acid
microorganism
culture medium
enzyme
microorganism according
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RU2000122119/13A
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Russian (ru)
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RU2261272C2 (en
Inventor
Хироси ИЗУИ
Мика МОРИЙА
Сейко ХИРАНО
Йосихико ХАРА
Хисао ИТО
Казухико МАТСУИ
Original Assignee
Адзиномото Ко., Инк.
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Application filed by Адзиномото Ко., Инк. filed Critical Адзиномото Ко., Инк.
Publication of RU2000122119A publication Critical patent/RU2000122119A/en
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Publication of RU2261272C2 publication Critical patent/RU2261272C2/en

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Claims (13)

1. Микроорганизм, который способен метаболизировать источник углерода при конкретной величине рН в жидкой культуральной среде, содержащей L-глутаминовую кислоту в концентрации насыщения и источник углерода, а также обладает способностью накапливать L-глутаминовую кислоту в количестве, превосходящем то количество, которое соответствует ее концентрации насыщения в жидкой культуральной среде при данном рН.1. A microorganism that is capable of metabolizing a carbon source at a specific pH in a liquid culture medium containing L-glutamic acid in a saturation concentration and a carbon source, and also has the ability to accumulate L-glutamic acid in an amount exceeding the amount corresponding to its concentration saturation in a liquid culture medium at a given pH. 2. Микроорганизм по п. 1, который способен расти в жидкой культуральной среде. 2. The microorganism according to claim 1, which is capable of growing in a liquid culture medium. 3. Микроорганизм по п. 1 или 2, отличающийся тем, что величина рН не превышает 5,0. 3. The microorganism according to claim 1 or 2, characterized in that the pH does not exceed 5.0. 4. Микроорганизм по любому из пп. 1-3, который обладает по крайней мере одним из следующих признаков: микроорганизм характеризует усиленной активностью фермента, который катализирует реакцию в биосинтезе L-глутаминовой кислоты; и микроорганизм характеризуется снижением или нарушением активности фермента, который катализирует реакцию, отклоняющуюся от биосинтетического пути L-глутаминовой кислоты и приводящую к образованию иного, нежели L-глутаминовая кислота, соединения. 4. The microorganism according to any one of paragraphs. 1-3, which has at least one of the following characteristics: the microorganism characterizes the enhanced activity of an enzyme that catalyzes the reaction in the biosynthesis of L-glutamic acid; and the microorganism is characterized by a decrease or violation of the activity of the enzyme, which catalyzes a reaction that deviates from the biosynthetic pathway of L-glutamic acid and leads to the formation of a compound other than L-glutamic acid. 5. Микроорганизм по п. 4, отличающийся тем, что фермент, который катализирует реакцию в биосинтезе L-глутаминовой кислоты, является по крайней мере одним ферментом из группы, включающей цитратсинтазу, фосфоенолпируваткарбоксилазу и глутаматдегидрогеназу. 5. The microorganism according to claim 4, characterized in that the enzyme that catalyzes the reaction in the biosynthesis of L-glutamic acid is at least one enzyme from the group comprising citrate synthase, phosphoenolpyruvate carboxylase and glutamate dehydrogenase. 6. Микроорганизм по п. 4 или 5, отличающийся тем, что ферментом, который катализирует реакцию, отклоняющуюся от биосинтетического пути L-глутаминовой кислоты и приводящую к образованию иного, нежели L-глутаминовая кислота, соединения, является α-кетоглутаратдегидрогеназа. 6. The microorganism according to claim 4 or 5, characterized in that the enzyme that catalyzes a reaction that deviates from the biosynthetic pathway of L-glutamic acid and leads to the formation of a compound other than L-glutamic acid is α-ketoglutarate dehydrogenase. 7. Микроорганизм по любому из пп. 1-6, отличающийся тем, что этот микроорганизм относится к роду Enterobacter. 7. The microorganism according to any one of paragraphs. 1-6, characterized in that this microorganism belongs to the genus Enterobacter. 8. Микроорганизм по п. 7, являющийся видом Enterobacter agglomerans. 8. The microorganism according to claim 7, which is a species of Enterobacter agglomerans. 9. Микроорганизм по п. 8, который несет мутацию, которая обусловливает снижение секреции за пределы клеток вязкого материала по сравнению со штаммом дикого типа в случае культивирования в среде, содержащей сахариды. 9. The microorganism according to claim 8, which carries a mutation that causes a decrease in secretion outside the cells of the viscous material compared to the wild-type strain in the case of cultivation in a medium containing saccharides. 10. Способ получения L-глутаминовой кислоты путем ферментации, который включает культивирование микроорганизма в соответствии с любым из пп. 1-9 в жидкой культуральной среде, величина рН которой доводится до такой величины, при которой L-глутаминовая кислота осаждается, с получением и накоплением L-глутаминовой кислоты и осаждением L-глутаминовой кислоты в культуральной среде. 10. A method of producing L-glutamic acid by fermentation, which includes the cultivation of a microorganism in accordance with any one of paragraphs. 1-9 in a liquid culture medium, the pH of which is adjusted to a value at which L-glutamic acid precipitates, with the production and accumulation of L-glutamic acid and precipitation of L-glutamic acid in the culture medium. 11. Способ скрининга микроорганизма, пригодного для выработки L-глутаминовой кислоты с помощью ферментации, сопряженной с осаждением L-глутаминовой кислоты в жидкой культуральной среде, который включает внесение содержащего микроорганизмы образца в кислую культуральную среду, содержащую L-глутаминовую кислоту в концентрации насыщения и источник углерода, и отбор штамма, который способен метаболизировать данный источник углерода. 11. A method for screening a microorganism suitable for producing L-glutamic acid by fermentation coupled with precipitation of L-glutamic acid in a liquid culture medium, which comprises introducing a sample containing microorganisms into an acidic culture medium containing L-glutamic acid in a saturation concentration and a source carbon, and selection of a strain that is capable of metabolizing a given carbon source. 12. Способ по п. 11, отличающийся тем, что штамм, который способен расти в культуральной среде, выбирается в качестве штамма, способного метаболизировать источник углерода. 12. The method according to p. 11, characterized in that a strain that is able to grow in a culture medium is selected as a strain capable of metabolizing a carbon source. 13. Способ по п. 11 или 12, отличающийся тем, что величина рН культуральной среды не превышает 5,0. 13. The method according to p. 11 or 12, characterized in that the pH of the culture medium does not exceed 5.0.
RU2000122119/13A 1999-08-20 2000-08-18 Strain enterobacter agglomerans, method for preparing l-glutamic acid (variants) and method for preparing microorganism for producing l-glutamic acid RU2261272C2 (en)

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Application Number Priority Date Filing Date Title
JP11-234806 1999-08-20
JP23480699 1999-08-20
JP2000-78771 2000-03-21
JP2000078771 2000-03-21

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CN (2) CN101230366B (en)
AT (1) ATE335081T1 (en)
AU (1) AU5345200A (en)
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