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Method for identifying positions of proteins bound to a single DNA molecule

Research Project

Project/Area Number 21K14511
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 28050:Nano/micro-systems-related
Research InstitutionNagoya University

Principal Investigator

Naoki Azuma  名古屋大学, 工学研究科, 助教 (50823283)

Project Period (FY) 2021-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2022: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordsDNA一分子 / タンパク質結合位置特定 / 微小流路 / 蛍光分子局在化法 / 圧力泳動 / DNA一分子分析 / マイクロ流路 / 超解像イメージング / マイクロ流体デバイス / 光学的超解像 / 一分子操作 / DNA-タンパク質結合 / ナノバイオ計測 / DNA分子
Outline of Research at the Start

本研究は,DNA1分子でCas9タンパク質の結合位置特定を実現する新規手法の提案を目的とする.微小流路内のDNA1分子操作を用いてCas9タンパク質の結合・抽出と分子の伸長・固定を,STORM(Stochastic optical reconstruction microscopy)による光学的超解像法を用いて高精度な結合位置特定を実現する.

Outline of Final Research Achievements

The purpose of this research was to realize a method for identifying the positions of proteins bound to a single DNA molecule by directly observing method. We have developed two elemental technologies. One is the stretching and immobilizing a single DNA molecule using a pressure flow in a microchannel. The other is identifying the positions of proteins bound to a single DNA molecule with 10 nm accuracy using the super-localization method, which is one of the super-resolution techiniques. The feasibility of the proposed method for identifying positions of proteins bound to a single DNAA molecule was demonstrated through experimental validation of stretching and immobilizing method and super-localization method.

Academic Significance and Societal Importance of the Research Achievements

本研究は,これまでに実現されていなかったDNA一分子の伸長・固定および光学的手法による10 nm精度の結合位置特定を実現できる独創的な手法であり,挑戦的である.従来のゲル法のように,検出に多数の分子を必要とせず,高速かつ高感度にタンパク質の結合位置特定を実現でき,DNA編集法であるCRISPR/Cas9の評価手法として貢献できる可能性があるため,社会的意義が大きい.さらに,DNA一分子で10 nm精度の分析を可能とするため,これまでの分析法に代わるDNA一分子分析法として長さ分析や塩基配列特定に展開でき,生命科学や創薬科学への波及効果も期待できる.

Report

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

    (4 results)

All 2023 2022 2021

All Presentation (4 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] 一分子伸長固定と超解像光学観察による DNA 一分子上の結合タンパク質の位置特定法2023

    • Author(s)
      鈴木 瞭太朗 , 東 直輝 , 福澤 健二 , 伊藤 伸太郎 , 張 賀東
    • Organizer
      IIP2023 情報・知能・精密機器部門(IIP部門)講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] DNA一分子分析のための微小流路内の伸長・固定と超解像イメージング2022

    • Author(s)
      鈴木 瞭太朗 , 東 直輝 , 福澤 健二 , 伊藤 伸太郎 , 張 賀東
    • Organizer
      日本機械学会2022年度年次大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Stretching DNA molecule using pressure flow in a microchannel and its super-resolution imaging2022

    • Author(s)
      Ryotaro Suzuki, Naoki Azuma, Kenji Fukuzawa, Shintaro Itoh, Hedong Zhang
    • Organizer
      2022 JSME-IIP/ASME-ISPS Joint Conference on Micromechatronics for Information and Precision Equipment (MIPE2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Stretching and fixing DNA molecules on air-plasma-treated surface by using an air/water interface in a microchannel2021

    • Author(s)
      Naoki Azuma Shintaro Itoh, Kenji Fukuzawa, Hedong Zhang
    • Organizer
      The 64th International Conference On Electron, Ion and Photon Beam Technology and Nanofabrication
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2021-04-28   Modified: 2024-01-30  

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