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Single molecule studies of circular DNA using molecular ring toss technique

Research Project

Project/Area Number 18K06175
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43040:Biophysics-related
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Hirano Ken  国立研究開発法人産業技術総合研究所, 生命工学領域, 主任研究員 (80392653)

Co-Investigator(Kenkyū-buntansha) 寺尾 京平  香川大学, 創造工学部, 准教授 (80467448)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywordsゲノム / DNA / 直鎖 / 環状 / 1分子 / マイクロ流体デバイス / 分子輪投げ / 1分子DNA / 環状DNA / 1分子ダイナミクス解析 / 生物物理 / ナノバイオ / マイクロ・ナノ流体デバイス / DNA1分子 / マイクロ・ナノデバイス
Outline of Final Research Achievements

The purpose of this research project was to observe single molecules of circular DNA in a "ring" state and to achieve a method that enables direct real-time analysis. Conventionally, various discoveries and elucidation of phenomena have been made by observing single molecules of linear DNA. However, for "circular" DNA, which is another important genomic DNA structure in the living body, the single molecule observation method has not been developed. In this research project, we will provide novel method for capturing and observing single circular DNA molecules in a “ring” state by hooking it on a micropillar in the manner of ring-toss using a unique microfluidic device. Through this, we aim to achieve real-time observation of the dynamics of structural and morphological changes in single molecular level for circular DNA, such as interaction with the ambient solution environment.

Academic Significance and Societal Importance of the Research Achievements

近年、DNAを1分子レベルでリアルタイムに観察する技術の発展により、これまで未知であった生体内の働きや現象について、新たな発見をもたらしている。ただ、この観察技術は直線状のDNA分子にしか適用できていないのが現状である。生体内のゲノムDNAにはもう一つの構造があり、その「環状」のDNA構造は、直接的・間接的に生体内で重要な働きを担っているものの1分子解析ができなかった。そこで本研究課題では、環状DNAの1分子リアルタイム観察を実現するため、半導体微細加工技術を用いて作製した新規デバイスにより環状DNA1分子を分子輪投げの要領で捕まえて「輪」の状態で、且つリアルタイムに観察可能な手法を確立した。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (12 results)

All 2021 2020 2019 2018

All Journal Article (8 results) (of which Peer Reviewed: 8 results,  Open Access: 3 results) Presentation (3 results) Book (1 results)

  • [Journal Article] On-site processing of single chromosomal DNA molecules using optically driven microtools on a microfluidic workbench2021

    • Author(s)
      Masuda Akihito、Takao Hidekuni、Shimokawa Fusao、Terao Kyohei
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 7961-7961

    • DOI

      10.1038/s41598-021-87238-3

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] SU-8ナノ加工を用いた光操作型ナノニードルの開発2021

    • Author(s)
      原田雅彦, 高尾英邦, 下川房男, 寺尾京平
    • Journal Title

      電気学会論文誌E

      Volume: 141 Pages: 20010386-20010386

    • NAID

      130008046595

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Stainless microfluidic probe with 2D-array microapertures2021

    • Author(s)
      Takahashi Koki、Kamiya Shogo、Takao Hidekuni、Shimokawa Fusao、Terao Kyohei
    • Journal Title

      AIP Advances

      Volume: 11 Issue: 1 Pages: 015331-015331

    • DOI

      10.1063/5.0014119

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Biomaterials: Bone Mineral Analogue Ceramic Block as an Instant Adhesive to Biological Soft Tissue (Adv. Mater. Interfaces 6/2021)2021

    • Author(s)
      Sugiura Yuki、Okada Masahiro、Hirano Ken、Matsumoto Takuya
    • Journal Title

      Advanced Materials Interfaces

      Volume: 8 Issue: 6 Pages: 2170033-2170033

    • DOI

      10.1002/admi.202170033

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Capture and elongation of single chromosomal DNA molecules using optically driven microchopsticks2020

    • Author(s)
      Inukai Ryo、Takao Hidekuni、Shimokawa Fusao、Terao Kyohei
    • Journal Title

      Biomicrofluidics

      Volume: 14 Issue: 4 Pages: 044114-044114

    • DOI

      10.1063/5.0017727

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Molecular ring toss of circular BAC DNA using micropillar array for single-molecule studies2020

    • Author(s)
      Dohi Daiki、Hirano Ken、Terao Kyohei
    • Journal Title

      Biomicrofluidics

      Volume: 14 Issue: 1 Pages: 014115-014115

    • DOI

      10.1063/1.5142666

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Stretching of single DNA molecules caused by accelerating flow on a microchip2018

    • Author(s)
      Hirano, K., Iwaki, T., Ishido, T., Yoshikawa, Y., Naruse, K., Yoshikawa, K.
    • Journal Title

      J. Chem. Phys.

      Volume: 149 Issue: 16 Pages: 165101-165101

    • DOI

      10.1063/1.5040564

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 1分子DNAの操作・解析-静電気力・レーザー光圧力とマイクロ・ナノ流体デバイスが織りなす革新的技術-2018

    • Author(s)
      平野 研
    • Journal Title

      静電気学会誌

      Volume: 42 Pages: 156-161

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] DNA stretching induced by polymer stream tube in 1um channel2018

    • Author(s)
      Hirano, K.
    • Organizer
      MicroTAS2018
    • Related Report
      2018 Research-status Report
  • [Presentation] 分子輪投げによる環状DNA1分子のトラップ2018

    • Author(s)
      平野 研、土肥大輝、寺尾京平
    • Organizer
      第56回日本生物物理学会年会
    • Related Report
      2018 Research-status Report
  • [Presentation] 1分子解析のためのマイクロピラー構造等を用いたマイクロ流体デバイスの開発2018

    • Author(s)
      平野 研
    • Organizer
      第3回広島大学・山口大学・香川大学・FAIS合同ナノテクノロジープラットフォームシンポジウム
    • Related Report
      2018 Research-status Report
  • [Book] 暮らしと人を見守る水センシング技術2019

    • Author(s)
      暮らしと人を見守る水センシング技術研究調査委員会
    • Total Pages
      222
    • Publisher
      シーエムシー出版
    • ISBN
      9784781314280
    • Related Report
      2019 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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