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Optical analysis of mesoscopic DNA condensates as reaction fields

Research Project

Project/Area Number 21K05108
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 34020:Analytical chemistry-related
Research InstitutionThe University of Electro-Communications

Principal Investigator

TANAKA Makiko  電気通信大学, 大学院情報理工学研究科, 准教授 (90397703)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
KeywordsDNA / 電子移動 / 液晶 / 集合 / 集合体 / 凝縮場 / 相分離
Outline of Research at the Start

DNAが集合し相分離を起こす条件には明らかとなっていない点が多く、DNAの凝縮した場がDNAの機能と性質に与える影響もまだ未解明である。そこで本研究では、DNA凝縮場の形成条件を検討し、相分離凝縮場でのDNAの電子移動と核酸塩基損傷特性の詳細について、光を用いて化学的アプローチにより解析する。DNAの機能に及ぼす凝縮場の影響を探索することで、細胞内での生体分子の状態と生体機能の維持についての理解に貢献することを目指す。

Outline of Final Research Achievements

We analyzed the function of double-stranded DNA condensation in an artificially created molecularly crowded environment using optical approaches. In a molecularly crowded environment created with polyethylene glycol, double-stranded DNA was packed into a liquid crystal, and the electron transfer properties of DNA in this DNA condensation field were evaluated. As a result, it was suggested that the efficiency of electron transfer through DNA was greatly increased by assembly. Furthermore, by changing the DNA sequence, we discovered that DNA assembles into a hexagonal platelet, and clarified its structure and properties.

Academic Significance and Societal Importance of the Research Achievements

DNAやタンパクの集合が、生命維持機能を担っていることが分子生物学分野の研究から明らかになってきたのはごく最近である。化学的なアプローチでこれまで主に希薄で均一な溶液中で研究されてきたDNAについても、凝縮体でどのような特性を示すようになるのかを調べる必要がある。本研究で得られた成果は、二本鎖DNAの凝縮場における電子移動特性の変化や塩基損傷への新たな知見を与え、またその凝縮体が周囲の環境によって形態を大きく変化させることを明らかにするなど、DNAの関わる生命現象を捉えなおす手がかりとなりうる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (15 results)

All 2024 2023 2022 2021 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (11 results) (of which Int'l Joint Research: 4 results,  Invited: 3 results) Remarks (1 results)

  • [Journal Article] Various Forms of Self-Assembled DNA and Their Properties2023

    • Author(s)
      Tetsunao Makino, Makiko Tanaka
    • Journal Title

      Accounts of Materials & Surface Research

      Volume: 8 Pages: 107-115

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Self‐Assembled Micro‐Sized Hexagons Built from Short DNA in a Crowded Environment2022

    • Author(s)
      Makino Tetsunao、Nakane Daisuke、Tanaka Makiko
    • Journal Title

      ChemBioChem

      Volume: 23 Issue: 22

    • DOI

      10.1002/cbic.202200360

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evaluation of DNA-mediated electron transfer using a hole-trapping nucleobase under crowded conditions2022

    • Author(s)
      Taketomi Yuuki、Yamaguchi Yuuki、Sakurai Shunsuke、Tanaka Makiko
    • Journal Title

      Organic & Biomolecular Chemistry

      Volume: 20 Issue: 10 Pages: 2043-2047

    • DOI

      10.1039/d1ob01669e

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 二本鎖DNAのマイクロメートルサイズのH型構造体への自己集合2024

    • Author(s)
      牧野 哲直, 田仲 真紀子
    • Organizer
      日本化学会春季年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Micro-sized liquid crystals composed of short double-stranded DNA2023

    • Author(s)
      Makiko Tanaka
    • Organizer
      The 6th Asian Chemical Biology Conference (ACBC2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Self-assembly of double-stranded DNA into hexagonal liquid crystal2023

    • Author(s)
      Makiko Tanaka
    • Organizer
      International Congress on Pure & Applied Chemistry (ICPAC) Bali
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 分子混雑環境下で形成する六角形DNA集合体の形成メカニズムの探索2023

    • Author(s)
      牧野 哲直, 田仲 真紀子
    • Organizer
      第13回 CSJ化学フェスタ2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] 六角形型DNA集合体の形成におけるDNA配列と共溶質の影響2023

    • Author(s)
      牧野 哲直、田仲 真紀子
    • Organizer
      日本化学会春季年会
    • Related Report
      2022 Research-status Report
  • [Presentation] Formation and Properties of DNA Liquid Crystalline Phase in Crowded Environment2022

    • Author(s)
      Makiko Tanaka
    • Organizer
      International Congress on Pure & Applied Chemistry Kota Kinabalu 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Formation of micro-sized hexagonal DNA assemblies in aqueous-salt PEG solution2022

    • Author(s)
      Tetsunao Makino, Daisuke Nakane, Makiko Tanaka
    • Organizer
      The 49th International Symposium on Nucleic Acid Chemistry
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 光学顕微鏡観察可能なマイクロメートルサイズの六角形型DNA構造体の形成2022

    • Author(s)
      牧野 哲直, 田仲 真紀子
    • Organizer
      第12回CSJ化学フェスタ
    • Related Report
      2022 Research-status Report
  • [Presentation] 光照射によるDNA集合体の形態変化2022

    • Author(s)
      木下 晴弥, 山口 湧暉, 田仲 真紀子
    • Organizer
      第12回CSJ化学フェスタ
    • Related Report
      2022 Research-status Report
  • [Presentation] 分子混雑環境における二本鎖DNAの集合体形成とその特性2022

    • Author(s)
      牧野哲直, 山口湧暉, 田仲真紀子
    • Organizer
      第16回バイオ関連化学シンポジウム
    • Related Report
      2022 Research-status Report
  • [Presentation] ホールトラップ核酸塩基を用いた分子混雑環境におけるDNA内電子移動効率の評価2021

    • Author(s)
      武富 祐樹、山口 湧暉、櫻井 俊亮、田仲 真紀子
    • Organizer
      第15回バイオ関連化学シンポジウム
    • Related Report
      2021 Research-status Report
  • [Remarks] 【ニュースリリース】二本鎖DNAが自己集合により六角形型液晶を形成することを発見

    • URL

      https://www.uec.ac.jp/news/announcement/2022/20221104_4914.html

    • Related Report
      2022 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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