CN101250563A - Method for realizing excessive accumulation of alpha-ketoglutarate acid by adding alpha-ketoglutarate acid dehydrogenase inhibitor - Google Patents

Method for realizing excessive accumulation of alpha-ketoglutarate acid by adding alpha-ketoglutarate acid dehydrogenase inhibitor Download PDF

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CN101250563A
CN101250563A CNA2008100200394A CN200810020039A CN101250563A CN 101250563 A CN101250563 A CN 101250563A CN A2008100200394 A CNA2008100200394 A CN A2008100200394A CN 200810020039 A CN200810020039 A CN 200810020039A CN 101250563 A CN101250563 A CN 101250563A
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alpha
tong wuersuan
reached
fermentation
ketoglutaric acid
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CN101250563B (en
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陈坚
张旦旦
刘立明
堵国成
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Guangdong Huanxi Biotechnology Co., Ltd.
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Jiangnan University
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Abstract

The invention relates to a method for adding alpha-ketoglutarate dehydrogenase inhibitor to realize excessive accumulation of alpha-ketoglutaric acid, which belongs to the technical field of the metabolic regulation optimized fermentation process of the protein level. The method of the invention comprises following steps: utilizing multi - vitamin - auxotrophic yeast of Torulopsis glabrata CCTCC M202019 as producing strains, regulating the activity of alpha-ketoglutarate dehydrogenase through adding the alpha-ketoglutarate dehydrogenase inhibitor: hydrogen peroxide, methotrexate, sodium hypochlorite or hydroxyamino in culture medium, purposively lowing the activity of the alpha-ketoglutarate dehydrogenase, reducing the degradation of the alpha-ketoglutaric acid in the metabolic process, and achieving the aim of the excessive accumulation of the alpha-ketoglutaric acid. The method of the invention cuts off carbon metabolism flow on a node of the alpha-ketoglutaric acid through regulating the stream distribution of carbon metabolism and the carbon metabolism flow, wherein the maximum output of the alpha-ketoglutaric acid reaches 23.2g/L, which is increased by 12.2% compared with the control. The invention provides a new thought for the fermentation research of TCA cycle intermediate metabolite.

Description

Add the ketoglurate dehydrogenase inhibitor and realize the method for α-Tong Wuersuan excess accumulation
Technical field
The present invention relates to a kind of interpolation ketoglurate dehydrogenase (KGDH) inhibitor and realize the method for α-Tong Wuersuan (KG) excess accumulation.By of the influence of research KGDH inhibitor, reach a large amount of accumulation of α-Tong Wuersuan to the metabolism stream flow direction and corresponding metabolic flux.The metabolic regulation that belongs to protein level is optimized the fermenting process technical field.
Background technology
α-Tong Wuersuan, claim α-glue ketone acid again, 2-oxopentanedioic acid or alpha-carbonyl pentanedioic acid are one of important intermediate product in tricarboxylic acid (TCA) circulation, playing an important role in the metabolism of microorganism cells, also is synthetic multiple amino acids, proteinic important precursor.Its structural formula is:
Figure S2008100200394D00011
The α-Tong Wuersuan structural formula
α-Tong Wuersuan has important application prospects in fields such as medicine, organic synthesis, nutrition-fortifying agents, and main application fields is at present: as the composition of sports nutrition beverage; Organic intermediate; The matched reagent of biochemical reagents and survey liver function; Physique strengthens tonic; Reduce postoperative patient and patients on long-term's body loss; At the precursor of brain as tyrosine and L-glutamic acid; Research simultaneously shows that also α-Tong Wuersuan has anti-cyanogen effect, is used with Sodium Nitrite, Sulfothiorine and can improves anti-cyanogen ability, and anticonvulsant action is arranged.α-Tong Wuersuan is mainly consumed at present in medical institutions, is used for diagnosing and sacred disease being treated.
Hydrogen peroxide, methotrexate, clorox and hydroxyl sulphur ammonia are extensive to the research of restraining effect in human nerve and heart disease of KGDH, and the rarely seen report of the research in microorganism especially yeast.Originally determined the restraining effect of these four kinds of materials to KGDH, simultaneously clear and definite inhibition concentration and interpolation time are for the fermentation research of TCA intercycle meta-bolites provides a new thinking.
Summary of the invention
The purpose of this invention is to provide a kind of method that the ketoglurate dehydrogenase inhibitor is realized the α-Tong Wuersuan excess accumulation of adding.Utilize torulopsis glabrata (T.glabrata) the CCTCCM202019 fermentative production KG of polyauxotroph, add an amount of KGDH inhibitor during the fermentation, autotelic inhibition KGDH activity reaches the purpose of a large amount of accumulation KG.
Technical scheme of the present invention: a kind of method of adding ketoglurate dehydrogenase inhibitor realization α-Tong Wuersuan excess accumulation, be that torulopsis glabrata (T.glabrata) the CCTCC M202019 that utilizes multiple vitamin defective type is the production bacterial strain, by add the KGDH inhibitor in substratum: hydrogen peroxide, methotrexate, clorox or hydroxyl sulphur ammonia are regulated the KGDH activity, the degraded of autotelic minimizing KG, carbon stream is terminated on this node of KG, realize the α-Tong Wuersuan excess accumulation; Regulate and control method is:
Fermentation 40h, when the interpolation hydrogen peroxide reached 5mM in fermention medium, the α-Tong Wuersuan accumulation volume reached 23.2g/L, and comparison is according to having improved 12.2%;
Or fermentation initial stage 0h, when the interpolation methotrexate reached 0.08 μ M in fermention medium, the α-Tong Wuersuan accumulation volume reached 22.7g/L, and comparison is according to having improved 10.1%;
Or fermentation initial stage 0h, when the interpolation clorox reached 0.4mM in fermention medium, the α-Tong Wuersuan accumulation volume reached 22.2g/L, and comparison is according to having improved 7.5%;
Or fermentation initial stage 0h, when interpolation hydroxyl sulphur ammonia reached 0.48 μ M in fermention medium, the α-Tong Wuersuan accumulation volume reached 22.0g/L, and comparison is according to having improved 6.1%.
1, bacterial classification
Torulopsis glabrata (T.glabrata) CCTCC NO.M 202019, be nicotinic acid, vitamin H, VitB1,4 kinds of vitamin deficient strain of pyridoxine hydrochloride, and the active composing type of pyruvic carboxylase reduces, and is this research department's seed selection bacterial strain, the patent No.: ZL 02113142.2.
2, substratum and cultural method
Seed culture medium: seed and slant medium (g/L): glucose 30, peptone 10, KH 2PO 41, MgSO 47H 2O 0.5; Agar 20 (slant medium), pH 5.5.
Fermention medium: glucose 100g/L; NH 4Cl 7g/L; KH 2PO 45g/L; MgSO 47H 2O 0.8g/L; Nicotinic acid 8mg/L; Pyridoxine hydrochloride 0.4mg/L; VitB1 0.02mg/L; Vitamin H 0.04mg/L; CaCO 360g/L; Add the KGDH inhibitor of different concns according to requirement of experiment.
Shake-flask culture: the seed of 30 ℃, 200rpm being cultivated 24h down changes fermentation culture over to 10% inoculum size and cultivates 72h based under 30 ℃, 200rpm condition.
3, analytical procedure
Determination of glucose: 3,5-dinitrosalicylic acid method.
The mensuration of pyruvic acid (PYR) and α-Tong Wuersuan (KG): adopt high performance liquid chromatography (HPLC) to measure.With reference to Agillent organic acid measuring method.Chromatographic condition is: ZORBAX SB-Aq reversed-phase column, and column temperature: 35 ℃, detector: UV 210nm, moving phase: 19.7g/L Na 2HPO 4+ 1.2%H 3PO 4+ 1% acetonitrile, pH2.0, flow velocity: 1.0mL/min, sampling volume: 5 μ L.
Dry cell weight (DCW) is measured: according to dry cell weight and corresponding OD value drawing standard curve,
1OD=0.29g/L?DCW。
Beneficial effect of the present invention: the present invention utilizes carbon metabolism and the distribution of the carbon metabolism flow flow direction in the regulation and control industrial microorganism, makes carbon metabolism flow terminate in that wherein the KG maximum production reaches 23.2g/L on this node of KG, and comparison is according to having improved 12.2%.
Embodiment
Embodiment 1 adds hydrogen peroxide to the influence to T.glabrata CCTCC NO.M 202019 fermentation and acids
The fermentation initial stage is added hydrogen peroxide, and along with the increase of hydrogen peroxide addition, output of pyruvic acid presents ascendant trend, and when the hydrogen peroxide addition was 5mM, KG output reached and is 21.8g/L to the maximum, and comparison is shone has increased by 5.6%, at this moment C KG/ C PYRValue is 0.73.Investigate the fermentation different steps and add the 5mM hydrogen peroxide to producing the influence of acid, KG produces acid initial stage (40h) and adds hydrogen peroxide, and the accumulation volume of KG increases maximum, is 23.2g/L, and comparison is according to having improved 12.2%.
The optimum addition that draws hydrogen peroxide thus is 5mM, and the interpolation time is that KG produces the acid initial stage (40h).
Embodiment 2 adds the influence of methotrexate to CCTCC NO.M 202019 fermentation and acids
The fermentation initial stage is added different concns Rheumatrex (MTX), increase along with the MTX addition, PYR and KG output all present the trend of falling after rising, when MTX concentration in the nutrient solution reaches 0.08 μ M, PYR and KG output all reach maximum value, be respectively 30.4g/L and 22.7g/L, comparison is shone has increased by 8.9% and 10.1% respectively, at this moment C KG/ C PYRValue is 0.75.Investigate the fermentation different steps and add MTX to producing the influence discovery of acid, along with the carrying out of fermentation, the influence that MTX produces KG to fermentation diminishes.
The optimum addition that draws MTX thus is 0.08 μ M, and the interpolation time is fermentation initial stage (0h).
Embodiment 3 adds the influence of clorox to CCTCC NO.M 202019 fermentation and acids
Add clorox and find that when interpolation concentration reached 0.4mM, KG output was 22.2g/L in substratum, comparison is according to increasing by 7.5%, C Pyr/ C KgValue has descended 6%.Investigate the fermentation different times and add 0.4mMNaClO 3The influence of producing acid is found fermentation initial (0h) is the best interpolation time.
The optimum addition that draws clorox thus is 0.4mM, and the interpolation time is fermentation initial stage (0h).
Embodiment 4 adds the influence of hydroxyl sulphur ammonia to CCTCC NO.M 202019 fermentation and acids
Add hydroxyl sulphur ammonia and find that when interpolation concentration reached 0.48 μ M, KG output was 22.0g/L in substratum, comparison is shone increases by 6.1%, and PYR output has descended 13.7%, C Pyr/ C KgValue is tending towards definite value, shows the increase along with oxythiamine concentration, and the KG fractional yield increases, and entering TCA round-robin carbon metabolism flow flow increases.
The optimum addition that draws hydroxyl sulphur ammonia thus is 0.48 μ M, and the interpolation time is fermentation initial stage (0h).

Claims (1)

1, a kind of method of adding ketoglurate dehydrogenase inhibitor realization α-Tong Wuersuan excess accumulation, torulopsis glabrata (T.glabrata) CCTCCM202019 that it is characterized in that utilizing multiple vitamin defective type is for producing bacterial strain, by in substratum, adding the ketoglurate dehydrogenase inhibitor: hydrogen peroxide, methotrexate, clorox or hydroxyl sulphur ammonia, adjusting ketoglurate dehydrogenase activity, the degraded of autotelic minimizing α-Tong Wuersuan, carbon stream is terminated on this node of α-Tong Wuersuan, realize the α-Tong Wuersuan excess accumulation; Regulate and control method is:
Fermentation 40h, when the interpolation hydrogen peroxide reached 5mM in fermention medium, the α-Tong Wuersuan accumulation volume reached 23.2g/L;
Or fermentation initial stage 0h, when the interpolation methotrexate reached 0.08 μ M in fermention medium, the α-Tong Wuersuan accumulation volume reached 22.7g/L;
Or fermentation initial stage 0h, when the interpolation clorox reached 0.4mM in fermention medium, the α-Tong Wuersuan accumulation volume reached 22.2g/L;
Or fermentation initial stage 0h, when interpolation hydroxyl sulphur ammonia reached 0.48 μ M in fermention medium, the α-Tong Wuersuan accumulation volume reached 22.0g/L.
CN2008100200394A 2008-03-20 2008-03-20 Method for realizing excessive accumulation of alpha-ketoglutarate acid by adding alpha-ketoglutarate acid dehydrogenase inhibitor Expired - Fee Related CN101250563B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102269737A (en) * 2010-06-07 2011-12-07 北京嘉事联博医药科技有限公司 HPLC (high performance liquid chromatography) detection method of arginine ketoglutarate
CN103911400A (en) * 2014-04-02 2014-07-09 江南大学 Method for efficiently producing alpha-oxoglutarate by adopting whole-cell transformation
CN105177065A (en) * 2015-09-11 2015-12-23 浙江树人大学 Method for synthesizing alpha-ketoglutaric acid by biological conversion method
CN110404074A (en) * 2019-08-20 2019-11-05 中国医学科学院基础医学研究所 Application of the OGDH mortifier in treatment disease of viral infection

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1259425C (en) * 2003-11-13 2006-06-14 江南大学 Method for microbial fermentation synthesis of alpha- ketoglutaric acid

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102269737A (en) * 2010-06-07 2011-12-07 北京嘉事联博医药科技有限公司 HPLC (high performance liquid chromatography) detection method of arginine ketoglutarate
WO2011153884A1 (en) * 2010-06-07 2011-12-15 北京嘉事联博医药科技有限公司 Method for detecting l-arginine-alpha-ketoglutarate using high performance liquid chromatography
CN102269737B (en) * 2010-06-07 2013-01-30 北京嘉事联博医药科技有限公司 HPLC (high performance liquid chromatography) detection method of arginine ketoglutarate
CN103911400A (en) * 2014-04-02 2014-07-09 江南大学 Method for efficiently producing alpha-oxoglutarate by adopting whole-cell transformation
CN103911400B (en) * 2014-04-02 2016-04-27 江南大学 A kind of method adopting resting cell to produce α-ketoglutaric acid
CN105177065A (en) * 2015-09-11 2015-12-23 浙江树人大学 Method for synthesizing alpha-ketoglutaric acid by biological conversion method
CN105177065B (en) * 2015-09-11 2019-07-23 浙江树人大学 A kind of method of biotransformation method synthesis α-ketoglutaric acid
CN110404074A (en) * 2019-08-20 2019-11-05 中国医学科学院基础医学研究所 Application of the OGDH mortifier in treatment disease of viral infection
CN110404074B (en) * 2019-08-20 2021-07-13 中国医学科学院基础医学研究所 Use of OGDH inhibitors in the treatment of viral infectious diseases

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