WO2004020657A1 - 酸化還元酵素と基質との反応中間体を捕捉する方法 - Google Patents
酸化還元酵素と基質との反応中間体を捕捉する方法 Download PDFInfo
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- WO2004020657A1 WO2004020657A1 PCT/JP2003/005797 JP0305797W WO2004020657A1 WO 2004020657 A1 WO2004020657 A1 WO 2004020657A1 JP 0305797 W JP0305797 W JP 0305797W WO 2004020657 A1 WO2004020657 A1 WO 2004020657A1
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- oxidoreductase
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/26—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving oxidoreductase
Definitions
- the present invention relates to a method for capturing a reaction intermediate between a oxidoreductase such as cytochrome c oxidase and a substrate and a substrate.
- a oxidoreductase such as cytochrome c oxidase
- the present invention provides a method for reducing oxidoreductase such as cytochrome c oxidase sufficiently by using a photoexcited reducing agent that emits electrons by light irradiation at such a low temperature that an aqueous solution containing oxidoreductase and a substrate freezes.
- a photoexcited reducing agent that emits electrons by light irradiation at such a low temperature that an aqueous solution containing oxidoreductase and a substrate freezes.
- a reaction is performed by reacting an enzyme solution containing a substrate at a low temperature, using a reagent that emits electrons by irradiating light, irradiating it with light, and reducing the enzyme.
- a reaction is carried out at a low temperature, there is almost no diffusion of the reagent and the efficiency of photoreduction is low.
- we have found conditions that can be completely reduced by using an amine-based electron donor that supplies electrons to the photochemical reaction reagent. Was. In this way, we successfully succeeded in capturing the reaction intermediate of the oxidoreductase.
- the reaction between the enzyme and the substrate is carried out without using an inhibitor in order to avoid side reactions due to P and to apply to enzymes in which an appropriate inhibitor is not present. Start at low temperature and capture reaction intermediates at low temperature. In this case, the reaction does not take place at the time of mixing the substrate with the enzyme, so there is no need to mix the substrate rapidly, and the target may be a crystalline protein. Can open.
- the present invention provides a first step, a first step, in which an oxidoreductase, a photoexcited reducing agent that emits electrons upon irradiation with light, an amine-based electron donor, and a substrate of the oxidoreductase are dissolved and mixed in water
- a second step in which the mixture produced in step 2 is cooled to 70 to 27 OK and frozen, and a light having a wavelength including the absorption wavelength of the metal complex at 70 to 270 K is added to the frozen mixture produced in the second step.
- FIG. 1 shows a low-temperature absorption spectrum of cytochrome c oxidase.
- the components of the oxidoreductase, the photoexcited reducing agent that emits electrons by light irradiation, the amine-based electron donor, and the substrate of the oxidoreductase are dissolved in water.
- the substrate is a gas
- the gas may be separately blown later into a solution in which other components are mixed.
- Oxidoreductase is an enzyme that catalyzes some kind of redox reaction and is one of the EC1 groups, one of the main groups in the enzyme classification set by the Enzyme Committee of the International Union of Biochemistry (IUB).
- IUB International Union of Biochemistry
- alcohol dehydrogenase hydrogenase, nitric oxide reductase, denitrifying enzymes (nitrate reductase, nitrite reductase, nitric oxide reductase, nitrous oxide reductase), P450 superfamily (P450nor, P450scc, P450cam, etc.)
- Quinol oxidase mitochondrial inner membrane electron transfer enzyme (complex I, complex II, cytochrome complex, cytochrome c oxidase, etc.), photosynthetic electron transfer enzyme (cytochrome f complex, Fd-NADP + Reductase, etc.), oxygen-adding enzymes (tryptophan 2,
- Examples of photo-exciting reducing agents that emit electrons upon irradiation with light include transgene complexes such as luteuium complexes (such as [Ru (bipyridine) 3 ] 2 ⁇ [Ru ( ⁇ 3 ) 6 ] 2+ ), and hydrocarbons. (Perylene and its derivatives, pyrene and its derivatives, etc.), various dyes (Vorphyrin (without Zn, Mg, and metal ions)), pH indicator (Methylene phenol, Ataridine orange, etc.), Methyl viologen, etc. Is mentioned.
- transgene complexes such as luteuium complexes (such as [Ru (bipyridine) 3 ] 2 ⁇ [Ru ( ⁇ 3 ) 6 ] 2+ ), and hydrocarbons. (Perylene and its derivatives, pyrene and its derivatives, etc.), various dyes (Vorphyrin (without Zn, Mg, and metal ions)), pH indicator (Methylene phenol, Atar
- [Ru (bipyridine) 3 ] 2+ has absorption peaks at 452 nm and 4226 nm, and is irradiated with light containing these wavelengths to excite it.
- the amount of the photoexciting reducing agent in the aqueous solution should be 2 to the reduction equivalent of the enzyme; about 0 times the concentration is necessary. At low temperatures, the efficiency of photoreduction is low and extra reagent is required. 1 110 O mM.
- the substrate is a compound that is catalyzed by the oxidoreductase, and is a substance that is reduced by receiving an electron.
- an electron acceptor other than the enzyme's original physiological substrate may be used.
- the concentration of the substrate in the aqueous solution is about 1 ⁇ to 20 mM.
- the amine electron donor is an amine compound having an amino group, an imino group, a hydrazino group, etc., which regenerates by supplying electrons to an oxidized photochemical reaction reagent after the photoexcited reducing agent releases electrons. .
- the amine electron donor has the role of preventing the electrons that have gone to the substrate or enzyme from returning to the photochemical reaction reagent, and is relatively stable, but is deprived of the electrons by the photochemical reaction reagent.
- Examples of the amine-based electron donor include ethylenediaminetetraacetic acid, triethanolamine, L-cystine, aerin, N, N-dimethylfurin and the like. These may be used in combination.
- the concentration of the amine-based electron donor in the aqueous solution is about 1 mM to 100 mM.
- the aqueous solution may further contain a pH buffer, a solubilizing agent, and other reagents, if necessary.
- a phosphate buffer or a Good's buffer may be used, and the pH is maintained within a range where the oxidoreductase can function normally (pH 1 to 14).
- the concentration of the pH buffer is preferably higher than the concentration of the photoexciting reducing agent in order to suppress the pH change accompanying the reaction of the photoexciting reducing agent, and is about 1 to 20 mM.
- oxidoreductase When the oxidoreductase is not a water-soluble protein, a surfactant (n-decyl- ⁇ -D-maltopyranoside ⁇ n-dodecyl- ⁇ -D-maltopyranoside cornoleic acid, Triton X-100 etc.) / ⁇ . Its concentration is about 0-1% (W / V).
- the mixture produced in the first stage is cooled and frozen.
- This temperature is 70 K to 270, that is, the temperature at which the aqueous solution is frozen and at which photoreduction is possible.
- This temperature is preferably lower than the temperature at which the substrate starts to diffuse in the mixture (referred to as the “diffusion start temperature”), but it is convenient to use the liquid nitrogen temperature (77 K).
- the diffusion initiation temperature is a temperature specific to the substrate and is substantially constant under the conditions as in the present invention.
- the diffusion start temperature can be known from the data of this example, for example, and is between 170: in the case of oxygen and 140 to 170 in the case of carbon monoxide.
- the frozen mixture is irradiated with light.
- the photoexcited photoexcited reducing agent emits electrons, and the oxidoreductase receives the electrons and is reduced.
- the temperature in this step may be the same as that in the second step, but from the viewpoint that the reaction with the substrate does not proceed, it is preferable that the temperature be lower than the diffusion start temperature. Is preferred. Therefore, the temperature at this stage is preferably a temperature lower than the diffusion start temperature, more preferably a temperature 5 to 20 K lower than the diffusion start temperature.
- the temperature is raised from the previous step, and the reduced redox enzyme reacts with the substrate to form a reaction intermediate.
- the temperature in this stage is higher than the temperature in the previous stage, and is preferably a temperature equal to or higher than the diffusion start temperature, but is equal to or lower than 270 K, more preferably, a diffusion start temperature to a diffusion start temperature + 5.
- the temperature is in the range of 0 K, more preferably the temperature in the range from the diffusion start temperature to the diffusion start temperature + 30 K, most preferably the diffusion start temperature.
- a fifth step of cooling the frozen mixture produced at this step to a temperature lower than the diffusion start temperature may be added. This is for retaining the reaction intermediate. It is usually convenient to set this temperature to the liquid nitrogen temperature (77 K).
- the method of the present invention can be applied to protein engineering as follows. The same applies to existing enzyme proteins, but in the future, if an enzyme is designed to function artificially with a redox reaction, technology to capture reaction intermediates at low temperatures will be important. this This makes it easier to determine the structure of the enzyme during the reaction by performing X-ray crystal structure analysis when testing and evaluating the function of the enzyme.
- the present invention is a reaction intermediate fixing method that does not require modification of an inhibitor or an enzyme, and the range of usable enzymes has been widened.
- photochemical reaction reagents with higher photosensitivity, reagents that combine photochemical reaction reagents and electron donors, etc. It can also be expected that only one electron is given to the enzyme using the luminescent light, and a reaction is generated for each electron, thereby making it possible to detect the enzyme reaction step by step.
- the method of the present invention can be used for a low-temperature oxygen detector.
- Nitric oxide produced in the body is unstable, but raw materials and nitric oxide reductase
- a reaction intermediate in which cytochrome c oxidase reduces a substrate (oxygen) was captured by the following procedure.
- Cytochrome c oxidase was added to 50 mM phosphate buffer (pH 6.8) containing 0.2% n-decyl- -D-maltopyranoside (purchased from Anatrace) (reported by Yoshikawa et al. (1977) Journal of Biological Chemistry , 252, 5498-5508).) Solvent 20 ⁇ ⁇ .
- Tris (2,2, -bipyridine) dichlororuthenium (II) (purchased from Sigma) is added to the solution of (3) in a dark place. After adding 100 M, the mixture is frozen in liquid nitrogen.
- FIG. 1 shows the absorption spectrum at this time.
- an absorption peak is observed around 603 nm, but there is no absorption derived from the reagent used in this vicinity, which coincides with the absorption peak of the reduced form of cytochrome c oxidase.
- the light irradiation excites the inium complex by photoexcitation and emits electrons, which pass electrons to cytochrome c oxidase, which is reduced.
- the ruthenium complex that has released electrons is a strong oxidizing agent, and if it is left as it is, a reverse reaction occurs in which electrons are removed from reduced cytochrome C oxidase, and the reaction does not proceed.
- an oxide-type ruthenium complex was reduced again by appropriately adding a substance serving as an electron donor.However, when the solution was frozen at a low temperature and the diffusion of molecules was small, although it was difficult to transfer electrons to the oxidized ruthenium complex, this problem was solved in the present invention by using an ammine-based electron donor (a mixture of ethylenediaminetetraacetic acid and furin). As a result, 100% photoreduction of cytochrome c oxidase was completed.
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- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
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Abstract
Description
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60318472T DE60318472T2 (de) | 2002-08-28 | 2003-05-08 | Verfahren zum aufsammeln von durch die reaktion einer oxidoreduktase mit ihren substraten gebildeten zwischenprodukten |
US10/525,974 US20050282241A1 (en) | 2002-08-28 | 2003-05-08 | Method of scavenging intermediate formed by reaction of oxidoreductase with substrate |
EP03723278A EP1553187B1 (en) | 2002-08-28 | 2003-05-08 | Method for trapping intermediates formed by the reaction between an oxidoreductase and its substrates |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002248909A JP4097485B2 (ja) | 2002-08-28 | 2002-08-28 | 酸化還元酵素と基質との反応中間体を捕捉する方法 |
JP2002-248909 | 2002-08-28 |
Publications (1)
Publication Number | Publication Date |
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WO2004020657A1 true WO2004020657A1 (ja) | 2004-03-11 |
Family
ID=31972543
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2003/005797 WO2004020657A1 (ja) | 2002-08-28 | 2003-05-08 | 酸化還元酵素と基質との反応中間体を捕捉する方法 |
Country Status (5)
Country | Link |
---|---|
US (2) | US20050282241A1 (ja) |
EP (1) | EP1553187B1 (ja) |
JP (1) | JP4097485B2 (ja) |
DE (1) | DE60318472T2 (ja) |
WO (1) | WO2004020657A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040217182A1 (en) * | 2003-04-29 | 2004-11-04 | Texas Instruments Incorporated | Integrated furnace control board and method |
US20040220777A1 (en) * | 2003-04-29 | 2004-11-04 | Texas Instruments Incorporated | Integrated furnace control board and method |
JP4942174B2 (ja) * | 2006-10-05 | 2012-05-30 | 東京エレクトロン株式会社 | 基板処理システムの処理レシピ最適化方法,基板処理システム,基板処理装置 |
KR100790817B1 (ko) * | 2006-12-06 | 2008-01-03 | 삼성전자주식회사 | 반도체 제조관리 시스템 |
JP2012021216A (ja) * | 2010-07-16 | 2012-02-02 | Sony Corp | 二酸化炭素固定化装置 |
JP6144924B2 (ja) * | 2012-03-21 | 2017-06-07 | 株式会社日立国際電気 | 基板処理装置、メンテナンス方法及びプログラム |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06271519A (ja) * | 1993-01-20 | 1994-09-27 | Cosmo Sogo Kenkyusho:Kk | 5−アミノレブリン酸の製造方法 |
JPH0892179A (ja) * | 1994-09-29 | 1996-04-09 | Cosmo Sogo Kenkyusho:Kk | 5−アミノレブリン酸の製造方法 |
Family Cites Families (10)
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US6774786B1 (en) * | 2000-11-07 | 2004-08-10 | Fisher-Rosemount Systems, Inc. | Integrated alarm display in a process control network |
US6855510B2 (en) * | 2001-03-20 | 2005-02-15 | Dana Farber Cancer Institute, Inc. | Pharmaceuticals and methods for treating hypoxia and screening methods therefor |
TWI244603B (en) * | 2001-07-05 | 2005-12-01 | Dainippon Screen Mfg | Substrate processing system for managing device information of substrate processing device |
US7280883B2 (en) * | 2001-09-06 | 2007-10-09 | Dainippon Screen Mfg. Co., Ltd. | Substrate processing system managing apparatus information of substrate processing apparatus |
US7091846B2 (en) * | 2002-03-18 | 2006-08-15 | Siemens Communications, Inc. | Methods and apparatus for handling information regarding an alarm for a communication network |
DE10393080T5 (de) * | 2002-10-08 | 2005-09-29 | Invensys Systems, Inc., Foxboro | Serviceportal |
US7525422B2 (en) * | 2005-04-14 | 2009-04-28 | Verizon Business Global Llc | Method and system for providing alarm reporting in a managed network services environment |
US7761172B2 (en) * | 2006-03-21 | 2010-07-20 | Exxonmobil Research And Engineering Company | Application of abnormal event detection (AED) technology to polymers |
US7538664B2 (en) * | 2006-09-29 | 2009-05-26 | Rockwell Automation Technologies, Inc. | Customized industrial alarms |
US7702401B2 (en) * | 2007-09-05 | 2010-04-20 | Fisher-Rosemount Systems, Inc. | System for preserving and displaying process control data associated with an abnormal situation |
-
2002
- 2002-08-28 JP JP2002248909A patent/JP4097485B2/ja not_active Expired - Fee Related
-
2003
- 2003-05-08 EP EP03723278A patent/EP1553187B1/en not_active Expired - Fee Related
- 2003-05-08 WO PCT/JP2003/005797 patent/WO2004020657A1/ja active IP Right Grant
- 2003-05-08 DE DE60318472T patent/DE60318472T2/de not_active Expired - Lifetime
- 2003-05-08 US US10/525,974 patent/US20050282241A1/en not_active Abandoned
-
2005
- 2005-03-29 US US10/541,379 patent/US20060235558A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06271519A (ja) * | 1993-01-20 | 1994-09-27 | Cosmo Sogo Kenkyusho:Kk | 5−アミノレブリン酸の製造方法 |
JPH0892179A (ja) * | 1994-09-29 | 1996-04-09 | Cosmo Sogo Kenkyusho:Kk | 5−アミノレブリン酸の製造方法 |
Non-Patent Citations (3)
Title |
---|
POWERS L. ET AL.: "Multiple structures and functions of cytochrome oxidase", J. INORG. BIOCHEM., vol. 23, no. 3-4, 1985, pages 207 - 217, XP002970431 * |
See also references of EP1553187A4 * |
STACH P. ET AL.: "Bacterial cytochrome C nitrite reductase: new structural and functional aspects", J. INORG. BIOCHEM., vol. 79, no. 1-4, 2000, pages 381 - 385, XP002970430 * |
Also Published As
Publication number | Publication date |
---|---|
US20050282241A1 (en) | 2005-12-22 |
EP1553187A4 (en) | 2006-10-18 |
JP2004081142A (ja) | 2004-03-18 |
EP1553187B1 (en) | 2008-01-02 |
DE60318472D1 (de) | 2008-02-14 |
EP1553187A1 (en) | 2005-07-13 |
US20060235558A1 (en) | 2006-10-19 |
JP4097485B2 (ja) | 2008-06-11 |
DE60318472T2 (de) | 2008-12-24 |
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