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2008 Fiscal Year Annual Research Report

金属錯体骨格を持つ拡張型ポリ(α-アミノ酸)の合成と2次構造構築

Research Project

Project/Area Number 20550063
Research InstitutionOsaka University

Principal Investigator

岡村 高明  Osaka University, 大学院・理学研究科, 講師 (90252569)

Keywords超分子化 / 金属錯体化学 / ペプチド / 非天然型アミノ酸
Research Abstract

酵素や金属蛋白質の特異な機能は、それぞれの蛋白質の特有の構造により実現されていると考えられる。例えば、錯体化学的に極めて不安定と考えられる酵素活性部位でさえ、巧妙に設計された蛋白質の中では安定に存在でき構造変化と連動して反応性が制御されている。即ち、三次元的構造の精緻な設計・構築が機能に繋がるものと期待できる。申請者は、合理的に立体構造を構築するための新たな物質群の設計指針として、光学活性なα-アミノ酸と剛直なスペーサーを組み合わせた「弘張型ポリ(α-アミノ酸)」という概念を独自に提唱し系統的な研究を行っている。
本年度は、ビス(ピリジン)銀錯体を骨格に持つ拡張型ポリ(α-アミノ酸)の合成を行い、X線解析を用いて結晶構造を明らかにした。α-アミノ酸として、側鎖が少し嵩高いイソブチル基のL-ロイシンと側鎖の枝分かれが無く立体障害が小さいブチル基を持つL-ノルロイシンを用いた。前者は結晶中、左巻きのらせんを形成していたが、後者はジグザクの構造を取っていた。これまでの知見と併せて考えると、前者が側鎖の嵩高さのためにα-炭素周りの立体構造が制御されているのに対し、後者は比較的自由なコンホメーションを取り得ることに起因していることが明らかとなった。両者は分子量が等しい構造異性体であることから、側鎖の嵩高さのわずかな違いによって拡張型ポリペプチド鎖の2次構造の制御と構築が可能でることを示している。錯体部分とアミノ酸部分の組合せで様々な2次構造の設計が行えると期待できる。

  • Research Products

    (26 results)

All 2009 2008

All Journal Article (24 results) (of which Peer Reviewed: 23 results) Presentation (2 results)

  • [Journal Article] Cadmium(II)coordination polymers with flexible tetradentate ligand 1,2,4,5-tetrakis(imidazol-1-ylmethyl)benzene : anion effect and reversible anion exchange property2009

    • Author(s)
      Guan-Cheng Xu
    • Journal Title

      CrystEngComm 11

      Pages: 261-270

    • Peer Reviewed
  • [Journal Article] Coordination Polymers with Varied Metal Centers and Flexible Tripodal Ligand 1,3,5-Tris(imidazol-1-ylmethyl)benzene : Synthesis, Structure, and Reversible Anion Exchange Property2009

    • Author(s)
      Guan-Cheng Xu
    • Journal Title

      Cryst.Growth Des. 9

      Pages: 395-403

    • Peer Reviewed
  • [Journal Article] Mass Spectrometric Analysis Using Ruthenium(II)-Labeling for Identification of Glycosyl Hydrolase Product2009

    • Author(s)
      Akihiro Ito
    • Journal Title

      Biosci., Biotechnol., Biochem. 73

      Pages: 428-430

    • Peer Reviewed
  • [Journal Article] Novel dense organic-lanthanide hybrid architectures : syntheses, structures and magnetic properties2009

    • Author(s)
      Zheng-Shuai Bai
    • Journal Title

      Dalton Trans. 2009

      Pages: 2528-2539

    • Peer Reviewed
  • [Journal Article] Investigation of the Effect of the NH…OC Hydrogen Bond from Cys69 to PYP Chromophore Using Novel Active-center Model Compound2009

    • Author(s)
      Kentaro Okamoto
    • Journal Title

      Chem.Lett. 38

      Pages: 456-457

    • Peer Reviewed
  • [Journal Article] Synthesis, structure and fluorescence of novel cadmium(II)and silver(I)complexes with in situ ligand formation of 1-(5-tetrazolyl)-4-(imidazol-1-ylmethyl)benzene2009

    • Author(s)
      Zhi Su
    • Journal Title

      J.Solid State Chem. 182

      Pages: 1417-1423

    • Peer Reviewed
  • [Journal Article] Synthesis, structure and property of cobalt(II)complexes with 3,5-di(1H-imidazol-1-yl)benzoic acid2009

    • Author(s)
      Zhi Su
    • Journal Title

      CrystEngComm 11

      Pages: 873-880

    • Peer Reviewed
  • [Journal Article] Syntheses and crystal structures of two supramolecular isomers of manganese(II)with 3,5-bis(isonicotinamido)benzoate2009

    • Author(s)
      Man-Sheng Chen
    • Journal Title

      J.Coord.Chem. 62

      Pages: 2421-2428

    • Peer Reviewed
  • [Journal Article] New metal-organic architectures of cobalt(II), nickel(II)and zinc(II)with tripodal ligand 5-(1H-imidazol-4-ylmethyl)aminoisophthalic acid2009

    • Author(s)
      Jing Xu
    • Journal Title

      Polyhedron 28

      Pages: 2480-2486

    • Peer Reviewed
  • [Journal Article] Acidity control by on/off switching of an intramolecular NH…O hydrogen bond by E/Z photoisomerization of cinnamate framework2009

    • Author(s)
      Takashi Matsuhira
    • Journal Title

      Chem.Lett. 38

      Pages: 666-667

    • Peer Reviewed
  • [Journal Article] Color regulation and stabilization of chromophore by Cys69 in photoactive yellow protein active center2009

    • Author(s)
      Kentaro Okamoto
    • Journal Title

      Org.Biomol.Chem. 7

      Pages: 3782-3791

    • Peer Reviewed
  • [Journal Article] Silver(I)complexes with oxazoline-containing tripodal ligands : structure variation via counter anions and reaction conditions2008

    • Author(s)
      Yong-Qing Huang
    • Journal Title

      Dalton Trans. 2008

      Pages: 204-213

    • Peer Reviewed
  • [Journal Article] Terminal proteomics : N- and C-terminal analyses for high-fidelity identification of proteins using MS2008

    • Author(s)
      Takashi Nakazawa
    • Journal Title

      Proteomics

      Pages: 673-685

    • Peer Reviewed
  • [Journal Article] Structure modulation of metal-organic frameworks via reaction pH : Self-assembly of a new carboxylate containing ligand N-(3-carboxyphenyl)iminodiacetic acid with cadmium(II)and cobalt(II)salts2008

    • Author(s)
      Qian Chu
    • Journal Title

      Polyhedron 27

      Pages: 812-820

    • Peer Reviewed
  • [Journal Article] Large(H_2O)_<56>(OH)_6 and(H_2O)_<20> Clusters inside a Nanometer-Sized M_6L_8 Cage Constructed by Five-Coordinated Copper(II)and Flexible Carboxamide-Containing Tripodal Ligand2008

    • Author(s)
      Yan Wang
    • Journal Title

      Cryst.Growth Des. 8

      Pages: 802-804

    • Peer Reviewed
  • [Journal Article] Syntheses, Structures and Luminescent Properties of Metal Complexes with Imidazole-Containing Polyamine Ligand2008

    • Author(s)
      Yi Lu
    • Journal Title

      Anorg.Allg.Chem. 634

      Pages: 708-713

    • Peer Reviewed
  • [Journal Article] Zinc, Cadmium, and Mercury 1,2-Benzenedithiolates with Intramolecular NH…S Hydrogen Bonds2008

    • Author(s)
      Koji Baba
    • Journal Title

      Inorg.Chem. 47

      Pages: 2837-2848

    • Peer Reviewed
  • [Journal Article] Manipulation of an intramolecular NH…O hydrogen bond by photoswitching between stable E/Z isomers of the cinnamate framework2008

    • Author(s)
      Takashi Matsuhira
    • Journal Title

      Org.Biomol.Chem. 10

      Pages: 1052-1062

    • Peer Reviewed
  • [Journal Article] Structure diversity and reversible anion exchange properties of cadmium(II)complexes with 1,3,5-tris(imidazol-1-ylmethyl)benzene : counteranion-directed flexible ligand conformational variation2008

    • Author(s)
      Guan-Cheng Xu
    • Journal Title

      CrystEngComm 10

      Pages: 1052-1062

    • Peer Reviewed
  • [Journal Article] pH-dependent self-assembly of copper(II)complexes with a new imidazole-containing polyamine ligand : Synthesis, structure and magnetic property2008

    • Author(s)
      Zhao-Peng Qi
    • Journal Title

      Polyhedron 27

      Pages: 2672-2680

    • Peer Reviewed
  • [Journal Article] Effect of N-Donor Ancillary Ligands on Supramolecular Architectures of a Series of Zinc(II)and Cadmium(II)Complexes with Flexible Tricarboxylate2008

    • Author(s)
      Guang-Xiang Liu
    • Journal Title

      Cryst.Growth Des. 8

      Pages: 3233-3245

    • Peer Reviewed
  • [Journal Article] Novel photosystem involving protonation and deprotonation processes modelled on a PYP nhotocycle2008

    • Author(s)
      Takashi Matsuhira
    • Journal Title

      Org.Biomol.Chem. 6

      Pages: 3118-3126

    • Peer Reviewed
  • [Journal Article] Selective isolation of N-terminal peptides from proteins and their de novo sequencing by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry without regard to unblocking or blocking of N-terminal amino acids2008

    • Author(s)
      Minoru Yamaguchi
    • Journal Title

      Rapid Commun.Mass Spectrom. 22

      Pages: 3313-3319

    • Peer Reviewed
  • [Journal Article]2008

    • Author(s)
      Qian Chu
    • Journal Title

      "Chemistry, Physics, and Biology in Macromolecular Science"中の"Supramoloecular Polymeric Metal-Organic Architectures with Carboxylate-Containing Tripodal Ligand"を分筆(Osaka University Press)

      Pages: 31-39

  • [Presentation] ビス(ピリジン)銀(I)骨格を持つ拡張型ポリペプチドの三次元構造構築2009

    • Author(s)
      岡村高明
    • Organizer
      第59回錯体化学討論会
    • Place of Presentation
      長崎大学文教キャンパス
    • Year and Date
      2009-09-26
  • [Presentation] ビス(ピリジン)銀(I)錯体を骨格に持つ拡張型ペプチドのらせん構造形成2009

    • Author(s)
      松村卓哉、岡村高明、山本仁、鬼塚清孝
    • Organizer
      日本化学会第89春季年会
    • Place of Presentation
      日本大学理工学部船橋キャンパス
    • Year and Date
      2009-03-29

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

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