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Mechanistic Study on Gene Repair Enzyme

Research Project

Project/Area Number 19K05705
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 37010:Bio-related chemistry
Research InstitutionTokushima Bunri University

Principal Investigator

Tanaka Yoshiyuki  徳島文理大学, 薬学部, 教授 (70333797)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords酵素反応機構解析 / 構造化学 / NMR / X線結晶構造解析 / タンパク質核酸複合体
Outline of Research at the Start

遺伝子修復は生体の恒常性維持機構であり、その異常はがんの病理とも深くかかわる。中でも、ヒト8-OxoGuanine Glycosylase 1 (hOGG1) は修復系で中核的役割を果たす酵素である。そこでがん病理の理解および生体の恒常性維持機構の理解に向けて、hOGG1の触媒機構の解明に挑む。hOGG1の活性残基としては、Lys249とAsp268が触媒残基と目されている。しかしこれらの触媒残基の化学的役割については未同定の部分が多い。そこで上記活性残基の触媒機構上の役割の解明を目指し、hOGG1タンパク質と基質DNA複合体についてNMRによる物性解析およびX線結晶構造解析を実施する。

Outline of Final Research Achievements

Human 8-OxoGuanine Glycosylase 1 (hOGG1) is a central enzyme within the gene-repair system that is related with the pathology of cancer and the homeostasis in living organisms. To understand the relationship between those biological activities and its enzymatic activity, we tried to reveal the catalytic mechanism of hOGG1. In hOGG1, Lys249 (K249) and Asp268 (D268) are considered to be catalytic residues at its active site. However, there are many uncertainties about the chemical role of these catalytic residues.
Based on this understanding, the following research was conducted. 1) An hOGG1 mutant was prepared, and its enzymatic pKa value was determined from the pH-dependent changes in enzyme activity. 2) Using the above mutant, its pKa values of the active residue was directly determined with NMR spectroscopy.
From these experiments, the enzymatic activity of the mutant and pKa values were explored. Then, the possible enzymatic pathway was considered.

Academic Significance and Societal Importance of the Research Achievements

遺伝子修復は生体の恒常性維持機構であり、その異常はがんの病理とも深くかかわる。中でも、損傷塩基として頻度の高い 8-oxoguanineを除去修復する酵素: ヒト 8-OxoGuanine Glycosylase 1 (hOGG1) は修復系で中核的役割を果たす酵素である。本研究では、hOGG1の触媒機構の解明に挑んだが、これは分子論的な立場から、がんに対する防御機構を理解すること、および、生体の恒常性維持機構を解明することにつながる 。また遺伝子修復系を標的としたがん治療薬の開発も進んでおり、がん治療薬の開発にも将来的に資する研究と考えられる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (17 results)

All 2021 2020 2019 Other

All Int'l Joint Research (3 results) Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results) Presentation (5 results) Book (1 results) Remarks (2 results)

  • [Int'l Joint Research] チェコ科学アカデミー (IOCB)(チェコ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Academy o Sciences of the Czech Republic(チェコ)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] チェコ科学アカデミー (IOCB)(チェコ)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Synthesis of a cyclic dinucleotide analog with ambiguous bases, 5-aminoimidazole-4-carboxamide.2021

    • Author(s)
      Noriko Saito Tarashima, Yusuke Kumanomido, Katsuyuki Nakashima, Yoshiyuki Tanaka and Noriaki Minakawa
    • Journal Title

      The Journal of Organic Chemistry

      Volume: 86 Issue: 21 Pages: 15004-15010

    • DOI

      10.1021/acs.joc.1c01706

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Chemical reduction of Ag+ to Ag employing organic electron donors: Evaluation of the effect of Ag+-mediated cytosine-cytosine base pairing on the aggregation of Ag nanoparticles.2021

    • Author(s)
      Takenori Dairaku, Rika Kawai, Kanako Nozawa-Kumada, Kentaro Yoshida, Tetsuya Ono, Yoshinori Kondo, Jiro Kondo, Akira Ono, Yoshiyuki Tanaka, and Yoshitomo Kashiwagi
    • Journal Title

      Dalton Transactions

      Volume: 50 Issue: 35 Pages: 12208-12214

    • DOI

      10.1039/d1dt01927a

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of cytosine-Ag+-cytosine base pairing on the redox potential of the Ag+/Ag couple and the chemical reduction of Ag+ to Ag by tetrathiafulvalene2021

    • Author(s)
      Takenori Dairaku, Rika Kawai, Teppei Kanaba, Tetsuya Ono, Kentaro Yoshida, Hajime Sato, Kanako Nozawa-Kumada, Yoshinori Kondo, Jiro Kondo, Akira Ono, Yoshiyuki Tanaka and Yoshitomo Kashiwagi
    • Journal Title

      Dalton Transactions

      Volume: - Issue: 22 Pages: 7633-7639

    • DOI

      10.1039/d1dt00975c

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Electrical conductance measurement of HgII-mediated DNA duplex in buffered aqueous solution2020

    • Author(s)
      Ryo Yamada,Issei Nomura,Yuki Yamaguchi,Yosuke Matsuda,Yoshikazu Hattori,Hirokazu Tada,Akira Ono &Yoshiyuki Tanaka
    • Journal Title

      Nucleosides, Nucleoteides & Nucleic Acids

      Volume: 0 Issue: 8 Pages: 0-0

    • DOI

      10.1080/15257770.2020.1755044

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] QM and QM/MM umbrella sampling MD study of the formation of Hg(II)-thymine bond: Model for evaluation of the reaction energy profiles in solutions with constant pH.2020

    • Author(s)
      Filip Sebesta, Jakub Sebera, Vladimir Sychrovsky, Yoshiyuki Tanaka and Jaroslav V. Burda
    • Journal Title

      Journal of Computational Chemistry

      Volume: 41 Issue: 16 Pages: 1509-1520

    • DOI

      10.1002/jcc.26194

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Structure-activity relationship of pseudoknot-type hammerhead ribozyme reveals key structural elements for enhanced catalytic activity2019

    • Author(s)
      Yamada Mituhiro、Tanaka Yoshiyuki
    • Journal Title

      Nucleosides, Nucleotides and Nucleic Acids

      Volume: 39 Issue: 1-3 Pages: 245-257

    • DOI

      10.1080/15257770.2019.1669169

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 1H-15N HSQCスペクトルによるhOGG1の活性残基Lys249の状態解析2021

    • Author(s)
      ○重松航太, 福田万里子, 岡田卓也, 市原尚弥, 眞野遙佳, 服部良一, ウラジミール シフロフスキー, 田中好幸
    • Organizer
      日本薬学会141年会
    • Related Report
      2020 Research-status Report
  • [Presentation] 改変ジフテリア毒素による薬剤送達技術の開発2021

    • Author(s)
      ○小松 優真、服部 良一、中島 勝幸、中川治、堅田 笑里、山本 普樹、山根 滉生、竹原正也、永浜 政博、田中 好幸
    • Organizer
      日本薬学会141年会
    • Related Report
      2020 Research-status Report
  • [Presentation] 遺伝子治療薬の構造学的分子設計2019

    • Author(s)
      ◯服部良一,竹原正也,小原一朗,蛭子翔太,後藤真希,山根滉生,中島勝幸,山口健太郎,永浜政博,田中好幸
    • Organizer
      第19回 日本蛋白質科学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] N-グリコシド結合切断反応における 8-オキソグアニン DNA グリコシラーゼ 1 (OGG1) Lys249 の触媒的役割2019

    • Author(s)
      ◯福田万里子,眞野遥佳,市原尚弥,岡田卓也,海野昌喜,Vladimir Sychrovsky,服部良一,田中好幸
    • Organizer
      第19回 日本蛋白質科学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] ヒトDNA修復酵素hOGG1のX線結晶構造解析2019

    • Author(s)
      ◯小室智稀,服部良一,田中好幸,海野昌喜
    • Organizer
      第92回 日本生化学会大会
    • Related Report
      2019 Research-status Report
  • [Book] 核酸科学ハンドブック(第II部 5 DNAとメタル執筆)日本核酸化学会監修2020

    • Author(s)
      田中好幸
    • Publisher
      講談社
    • ISBN
      9784065207864
    • Related Report
      2020 Research-status Report
  • [Remarks] 徳島文理大学薬学部 薬品分析学(田中研究室)

    • URL

      http://p.bunri-u.ac.jp/lab05/

    • Related Report
      2021 Annual Research Report
  • [Remarks] 徳島文理大学薬学部 薬品分析学(田中研究室)

    • URL

      http://p.bunri-u.ac.jp/lab05/

    • Related Report
      2020 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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