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2009 Fiscal Year Annual Research Report

生体系の柔軟な構造と反応過程の理論的研究

Research Project

Project/Area Number 18066013
Research InstitutionKyushu University

Principal Investigator

吉澤 一成  Kyushu University, 先導物質化学研究所, 教授 (30273486)

Keywords量子化学 / 分子理論 / 酵素反応 / 物性化学 / 金属酵素 / 量子輸送 / 大規模計算
Research Abstract

本研究では生体内の化学反応と電子輸送過程の理論的研究を行った。生体系における電子移動反応は酵素反応において極めて重要な役割を果たしている。一次元系のコンダクタンスを与えるLandauerの理論がナノスケール領域における電気伝導理論として用いられ、ナノサイズ分子特有の伝導現象を示す分子ワイヤーのI-V特性などが再現されている。ここでは、量子化学の重要な概念である軌道理論から分子ワイヤーのコンダクタンスについて議論した。分子における電子の輸送にはフロンティア軌道の振幅と位相が決定的な役割を果たすことを示した。さらに、メタンモノオキシゲナーゼ、ジオールデヒドラターゼ、フルオロアセテートデハロゲナーゼなどの酵素反応について大規模計算を実施し、酵素の構造と反応性に関する理論的研究を行った。これらの成果は、Journal of the American Chemical SocietyやChemistry-European Journalをはじめとするインパクトファクターの高いジャーナルに公表された。

  • Research Products

    (18 results)

All 2010 2009

All Journal Article (15 results) (of which Peer Reviewed: 15 results) Presentation (1 results) Book (2 results)

  • [Journal Article] Theoretical Study on Activation and Protonation of Dinitrogen on Cubane-Type MIr3S4 Clusters (M = V, Cr, Mn, Fe, Co, Ni, Cu, Mo, Ru and W)2010

    • Author(s)
      H.Tanaka, et al.
    • Journal Title

      Inorganic Chemistry 49

      Pages: 2464-2470

    • Peer Reviewed
  • [Journal Article] Theoretical Analysis of Diradical Nature of Adenosylcobalamin Cofactor-Tyrosine Complex in B12-Dependent Mutases : Inspiring PCET Driven Enzymatic Catalysis2010

    • Author(s)
      P.M.Kozlowski, et al.
    • Journal Title

      Journal of Physical Chemistry B 411(In press)

    • Peer Reviewed
  • [Journal Article] Theoretical Study of Thermal Spin Transition between the Singlet State and the Quintet State in the [Fe(2-pic)3]2+ Spin Crossover System (2-pic : 2-picolylamine)2010

    • Author(s)
      Y.Shiota, et al.
    • Journal Title

      Journal of Physical Chemistry A 114(In press)

    • Peer Reviewed
  • [Journal Article] Comparison of the Reactivity of Bis(μ-oxo)Cu^<II>Cu^<III> and Cu^<III>Cu^<III> Species to Methane2009

    • Author(s)
      Y.Shiota, et al.
    • Journal Title

      Inorganic Chemistry 48

      Pages: 838-845

    • Peer Reviewed
  • [Journal Article] Photochemical Reversibility of Ring-Closing and Ring-Opening Reactions in Diarylperfluorocyclopentenes2009

    • Author(s)
      A.Staykov, et al.
    • Journal Title

      Journal of Physical Chemistry C 113

      Pages: 3826-3834

    • Peer Reviewed
  • [Journal Article] Bistability of Magnetization without Spin-Transition in a High-Spin Cobalt(II) Complex due to Angular Momentum Quenching2009

    • Author(s)
      G.Juhasz, et al.
    • Journal Title

      Journal of the American Chemical Society 131

      Pages: 4560-4561

    • Peer Reviewed
  • [Journal Article] DFT Study on N_2 Activation by a Hydride-Bridged Diniobium Complex.N≡N Bond Cleavage Accompanied by H_2 Evolution2009

    • Author(s)
      H.Tanaka, et al.
    • Journal Title

      Inorganic Chemistry 48

      Pages: 3875-3881

    • Peer Reviewed
  • [Journal Article] What is the Identity of the Metal Ions in the Active Sites of Coenzyme B_<12>-Dependent Diol Dehydratase? A Computational Mutation Analysis2009

    • Author(s)
      T.Kamachi, et al.
    • Journal Title

      Journal of Physical Chemistry B 113

      Pages: 8435-8438

    • Peer Reviewed
  • [Journal Article] Catalytic Mechanism of Fluoroacetate Dehalogenase : Computational Eamloration of the Biological Dehalogenation2009

    • Author(s)
      T.Kamachi, et al.
    • Journal Title

      Chemistry-A European Journal 15

      Pages: 7394-7403

    • Peer Reviewed
  • [Journal Article] Orbital View Concept Applied on Photoswitching Systems2009

    • Author(s)
      Y.Tsuji, et al.
    • Journal Title

      Thin Solid Films 518

      Pages: 264-267

    • Peer Reviewed
  • [Journal Article] Metal-Ligand Cooperation in H_2 Production and H_2O Decomposition on a Ru(II) PNN Complex : the Role of Ligand Dearomatization-Aromatization2009

    • Author(s)
      J.Li, et al.
    • Journal Title

      Journal of the American Chemical Society 131

      Pages: 13584-13585

    • Peer Reviewed
  • [Journal Article] Stereochemistry of Disilanylene-Containing Cyclic Compounds.Synthesis and Palladium-Catalyzed Reactions of cis- and trans-3,4-Benzo-1,2-diisopropyl-1,2-dimethyl-1,2-disilacyclobut-3-ene2009

    • Author(s)
      A.Naka, et al.
    • Journal Title

      Zeitschrift fur Naturforschung B 64

      Pages: 1580-1590

    • Peer Reviewed
  • [Journal Article] Nickel(II), Palladium(II), and Platinum(II)η^<3->Allyl Complexes Bearing a Bidentate Titanium(IV) Phosphinoamide Ligand : A Ti-M_2 Dative Bond Enhances the Electrophilicity of the п-Allyl Moiety2009

    • Author(s)
      H.Tsutsumi, et al.
    • Journal Title

      Organometallics 28

      Pages: 1988-1991

    • Peer Reviewed
  • [Journal Article] Silicon-Carbon Unsaturated Compounds.76.Photochemical and Thermal Behavior of 1-Silacyclobut-3-enes Generated from the Reaction of Pivaloyltris(trimethylsilyl)silane with tert-Butylacetylene2009

    • Author(s)
      A.Naka, et al.
    • Journal Title

      Organometallics 28

      Pages: 5641-5646

    • Peer Reviewed
  • [Journal Article] Orbital Control of the Conductance Photoswitching in Diarvlethene2009

    • Author(s)
      Y.Tsuji, et al.
    • Journal Title

      Journal of Physical Chemistry C 113

      Pages: 21477-21483

    • Peer Reviewed
  • [Presentation] Computational Mutation of the Structure and Reactivity of B 12-Dependent Diol Dehydratase2009

    • Author(s)
      K.Yoshizawa
    • Organizer
      Gordon Research Conference
    • Place of Presentation
      英国オックスフォード大学
    • Year and Date
      2009-08-05
  • [Book] 化学のブレークスルー【理論化学編】2009

    • Author(s)
      吉澤一成, 他
    • Total Pages
      113
    • Publisher
      化学同人
  • [Book] 狭い空間で働く概念2009

    • Author(s)
      吉澤一成, 他
    • Publisher
      化学同人

URL: 

Published: 2011-06-16   Modified: 2016-04-21  

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