Elucidation of Structure and Reaction Mechanism of Novel Crystalline Enzymes Specific for C1 Microoranisms

C1微生物特异性新型结晶酶的结构和反应机制的阐明

基本信息

项目摘要

The research results of this study are summarized as follows.(1)Large scale preparation and general characterization of novel enzymes specific for C1 microorganisms : A novel enzyme isocitrate lyase (ICL) from the C1 microorganism, Hyphomicrobium methylovorum which we isolated as the best producer of serine from methanol, was purified and characterized. The distribution of the enzyme activities in Hyphomicrobium strains was reexamined, resulting in demonstrating that the enzyme activities were more or less found in all the strains tested unlike the reported results. Then, the ICL of Hyphomicrobium methylovorum was purified to homogeneity.. A large quantity of serine-glyoxylate aminotransferease (SGAT) was also purified to homogeneity from E.coli pKK223-3/SGAT which carried a highperexpressing vectore with the SGAT gene of Hyphomicrobium methylovorum.(2)Crystallization of novel enzymes specific for C1 microorganisms and X-ray crystallographic analyses : As for hydroxypyruvate reductase … More (HPR), a holo-enzyme which had the coenzyme NAD was crystallized (bipyramidal form) according to the crystallization procedures of the apo-enzyme which we have already established. As a result of X-ray crystallography of the holo-enzyme crystals, NAD was found to be bound to the site of the enzyme as we expected. Moreover, on the contrary to our expectation that there must be a change in angle of the cleft between the catalytic site and substrate binding site of the apo-enzyme, the structure of the holo-enzyme was unchaged as compared to that of the apo-enzyme. We succeeded in obtaining crystallization of the ternary complex of the enzyme (substrate-alalog-NAD and enzyme), so X-ray crystallographic analyses are now underway. As for the SGAT, we have obtained crystals of rhombus plate form by using the hanging drop method with Crystal Screen I.(3)kinetic studies of a novel enzyme, SGAT, specific for C1 microorganisms : As for SGAT, by the collaboration with Prof. Coolk's group, kinetic studies were carried out by the stopped-flow method and by use of the isotope-labelled substrates, and revealed that the enzyme catalyzed the reaction through a different reaction mechanism form other known aminotransfereases. Less
这项研究的研究结果总结如下。(1)针对C1微生物的新型酶的大规模制备和一般表征:一种新型酶等异源性裂解液酶(ICL),来自C1微生物,菌丝菌丝菌丝体,我们从甲基苯甲酸和甲基苯甲酸中分离出来,并纯化了甲基化的甲基甲基化酶,并被纯化。重新检查了菌粒菌株中酶活性的分布,从而证明在所有测试的菌株中,酶活性或多或少都与报道的结果不同。 Then, the ICL of Hyphomicrobium methylovorum was purified to homogeneity.. A large quantity of serine-glyoxylate aminotransferase (SGAT) was also purified to homogeneity from E.coli pKK223-3/SGAT which carried a higher-perexpressing vector with the SGAT gene of Hyphomicrobium methylovorum.(2)Crystallation of针对C1微生物和X射线晶体学分析的新型酶:至于羟型扭转酸酯还原……更多(HPR),一种全酶,具有辅酶NAD(双锥体形式)的全酶(HPR),根据Apo-enzyme的结晶过程,我们已经建立了apo-Enzyme。由于全酶晶体的X射线晶体学的结果,发现NAD正如我们预期的那样与酶位点结合。此外,与我们期望的是,催化位点和脱酶的底物结合位点之间的裂纹角度必须发生变化,而与Apo-enzyme相比,全酶的结构是没有塑料的。我们成功地获得了酶的三元络合物(底物 - alaalog-NAD和酶)的结晶,因此目前正在进行X射线晶体学分析。至于SGAT,我们通过使用与晶体屏幕的悬挂滴法获得了菱形板形式的晶体。酶通过不同的反应机理催化反应,形成了其他已知的氨基转移酶。

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Tadashi Tanabe: "Inverse gene expression of prostacyclin and thromboxane synthascs in resident and activated peritoncal macrophages" FEBS Letters. 409,2. 242-246 (1997)
Tadashi Tanabe:“驻留和激活的腹膜巨噬细胞中前列环素和血栓素合成酶的反向基因表达”FEBS Letters。
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
  • 通讯作者:
Peter Brock: "Structural basis for the activation of phenylalanine in the non-ribosomal biosynthesis of gramicidin S" EMBO Jorunal. 16,14. 4174-4183 (1997)
Peter Brock:“短杆菌肽 S 非核糖体生物合成中苯丙氨酸激活的结构基础”EMBO Jorunal。
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
  • 通讯作者:
Yoshikazu Izumi: "Occurrence of bromoperoxidase in the marine green macro-alga, Ulvella lens, and emission of volatile brominated methan by the enzyme"Phytochemistry. 52, 12. 1211-1215 (1999)
Yoshikazu Izumi:“溴过氧化物酶在海洋大型绿藻、石莼晶状体中的出现,以及该酶释放挥发性溴化甲烷的过程”植物化学。
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
  • 通讯作者:
T.Ohshiro, T.Kojima, K.Torii, H.Kawasoe, and Y.Izumi: "Purification and characterization of dibenzothiophene (DBT) sulfone monooxigenase involving in DBT desulfurization of Rhodococcus erythropolis J. Biosci. Biotechnol., 88, 610-616 (1999)"J. Biosci. Bio
T.Ohshiro、T.Kojima、K.Torii、H.Kawasoe 和 Y.Izumi:“涉及红平红球菌 DBT 脱硫的二苯并噻吩 (DBT) 磺单加氧酶的纯化和表征 J. Biosci. Biotechnol., 88, 610-
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
  • 通讯作者:
Y.Tanaka, T.Yoshida, K.Watanabe, Y.Izumi, and T.Mitsunaga: "Characterization, gene cloning and expression of isocitrate lyase involved in the assimilation of one-carbon compounds in an obligate methylotroph, Hyphomicrobium methylovorum GM2"Eur. J. Biochem
Y.Tanaka、T.Yoshida、K.Watanabe、Y.Izumi 和 T.Mitsunaga:“专性甲基营养菌 Hyphomicrobiummethylovorum GM2 中参与一碳化合物同化的异柠檬酸裂合酶的表征、基因克隆和表达”Eur
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
  • 通讯作者:
共 16 条
  • 1
  • 2
  • 3
  • 4
前往

IZUMI Yoshikazu的其他基金

Studies on the structure and function of enzymes related to C-S bond formation and cleavage of useful naturally-occuring cyclic compounds having sulfur
与有用的天然存在的含硫环状化合物的C-S键形成和裂解相关的酶的结构和功能的研究
  • 批准号:
    21580093
    21580093
  • 财政年份:
    2009
  • 资助金额:
    $ 9.02万
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
    Grant-in-Aid for Scientific Research (C)
Improvement of Functions of Novel Enzymes in the Desulfurization Metaoblism of Petroleum by Protein Engineering and Molecular Genetics
蛋白质工程和分子遗传学改进石油脱硫代谢新型酶的功能
  • 批准号:
    15580063
    15580063
  • 财政年份:
    2003
  • 资助金额:
    $ 9.02万
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
    Grant-in-Aid for Scientific Research (C)
Studies on Distribution of Marine Macro-algae in Europe Which Produce Novel Useful Enzymes and Their Structure-Function
欧洲产新型有用酶的大型海洋藻类的分布及其结构功能研究
  • 批准号:
    15404025
    15404025
  • 财政年份:
    2003
  • 资助金额:
    $ 9.02万
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
    Grant-in-Aid for Scientific Research (B)
Elucidation of properties of novel enzymes catalyzing the formation and the cleavage of carbon-sulfur bond in microooganisms
阐明微生物中催化碳硫键形成和断裂的新型酶的特性
  • 批准号:
    11660091
    11660091
  • 财政年份:
    1999
  • 资助金额:
    $ 9.02万
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
    Grant-in-Aid for Scientific Research (C)
Elucidation of functions of novel enzymes catalyzing the formation and the cleavage of cabond and their application
新型酶催化碳键形成和裂解的功能阐明及其应用
  • 批准号:
    09650877
    09650877
  • 财政年份:
    1997
  • 资助金额:
    $ 9.02万
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
    Grant-in-Aid for Scientific Research (C)
Development of production process for physiologically active substanses using haenzymes from marine alga and microoganism
利用海藻和微生物的酶生产生理活性物质的工艺开发
  • 批准号:
    07556092
    07556092
  • 财政年份:
    1995
  • 资助金额:
    $ 9.02万
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
    Grant-in-Aid for Scientific Research (A)
Enzymatic and Molecular Genetic Studies of Serine Production by C_1-Microorganisms
C_1-微生物产生丝氨酸的酶学和分子遗传学研究
  • 批准号:
    06650917
    06650917
  • 财政年份:
    1994
  • 资助金额:
    $ 9.02万
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
    Grant-in-Aid for General Scientific Research (C)
Studies on the Metabolic Enzymes Characteristic to C_1-Microorganisms----Structures and Functions
C_1-微生物代谢酶特性的研究----结构与功能
  • 批准号:
    06044148
    06044148
  • 财政年份:
    1994
  • 资助金额:
    $ 9.02万
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for international Scientific Research
    Grant-in-Aid for international Scientific Research
Halogenating Enzymes Produced by Marine Algae and Microbes---Structures and Functions
海藻和微生物产生的卤化酶——结构和功能
  • 批准号:
    04044118
    04044118
  • 财政年份:
    1992
  • 资助金额:
    $ 9.02万
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for international Scientific Research
    Grant-in-Aid for international Scientific Research
Enzymzyic znd Molecular Genetic Studies of Serine Production by C_1-Microorganisms
C_1-微生物产生丝氨酸的酶znd分子遗传学研究
  • 批准号:
    04660119
    04660119
  • 财政年份:
    1992
  • 资助金额:
    $ 9.02万
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
    Grant-in-Aid for General Scientific Research (C)

相似海外基金

Decoding AMPK-dependent regulation of DNA methylation in lung cancer
解码肺癌中 DNA 甲基化的 AMPK 依赖性调节
  • 批准号:
    10537799
    10537799
  • 财政年份:
    2023
  • 资助金额:
    $ 9.02万
    $ 9.02万
  • 项目类别:
Ceramides as Novel Mediators of Tubular Metabolic Dysfunction Driving Kidney Injury
神经酰胺作为肾小管代谢功能障碍驱动肾损伤的新型调节剂
  • 批准号:
    10677394
    10677394
  • 财政年份:
    2023
  • 资助金额:
    $ 9.02万
    $ 9.02万
  • 项目类别:
Elucidating the critical role of Wee1 in GIST
阐明 Wee1 在 GIST 中的关键作用
  • 批准号:
    10681775
    10681775
  • 财政年份:
    2023
  • 资助金额:
    $ 9.02万
    $ 9.02万
  • 项目类别:
Potential of tissue kallikreins as therapeutic targets for neuropsychiatric lupus
组织激肽释放酶作为神经精神狼疮治疗靶点的潜力
  • 批准号:
    10667764
    10667764
  • 财政年份:
    2023
  • 资助金额:
    $ 9.02万
    $ 9.02万
  • 项目类别:
Illumination of TAAR2 Location, Function and Regulators
TAAR2 位置、功能和调节器的阐明
  • 批准号:
    10666759
    10666759
  • 财政年份:
    2023
  • 资助金额:
    $ 9.02万
    $ 9.02万
  • 项目类别: