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Cooperativity of motor proteins using nano fabrications.

Research Project

Project/Area Number 20H00330
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 28:Nano/micro science and related fields
Research InstitutionKyoto University

Principal Investigator

Yokokawa Ryuji  京都大学, 工学研究科, 教授 (10411216)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥45,240,000 (Direct Cost: ¥34,800,000、Indirect Cost: ¥10,440,000)
Fiscal Year 2022: ¥14,820,000 (Direct Cost: ¥11,400,000、Indirect Cost: ¥3,420,000)
Fiscal Year 2021: ¥14,430,000 (Direct Cost: ¥11,100,000、Indirect Cost: ¥3,330,000)
Fiscal Year 2020: ¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
Keywordsナノマイクロ加工 / BioMEMS / ナノマイクロバイオシステム / 分子モーター / 生体分子の物性 / あ
Outline of Research at the Start

本研究課題では、生体内に存在するモータタンパク質の周期構造を生体外で再構築し、細胞内環境を再現することでモータの協働的な運動・力発生機能の創発現象を理解する。ナノ加工技術を用いることで、「モータが何分子でどのような協働性を発現するのか」というマルチモータに対する理解を深める。例えば、kinesin-1とkinesin-14では微小管の運動速度のモータ数依存性が異なるという知見が得られている。細胞内におけるメゾスケール(数10~数100分子)でのマルチモータの協働性をin vitroで再構築することで、モータの運動機能や微小管の物性が細胞レベルの高次機能に対してどう影響しているか理解する。

Outline of Final Research Achievements

In this study, we aimed to understand the emerging phenomena of cooperative motion and force generation functions by applying single molecule patterning technology to motor proteins. We developed an assay platform to anchor kinesin molecules and other molecules at intervals of 200~800 nm using gold nanopillar structures fabricated by the electron beam lithography and explained the bidirectional motion of microtubules at low molecular density using a chemo-mechanical model. We also showed that the bending stiffness can be designed by changing the polymerization rate of microtubules, and the correlation between the bending stiffness and the collective motion was clarified. This can also be demonstrated by in silico analysis, and a machine learning-based multilayer perceptron model can predict the bending stiffness from the microtubule morphology.

Academic Significance and Societal Importance of the Research Achievements

本研究では、微小管に結合するモータタンパク質の数を規定したり、微小管の物性を規定したりすることによる微小管運動への影響を調べ、なぜマルチモータと微小管の相互作用が細胞内で必須となっているのかについて、工学的な視点からアプローチした。1分子計測が主流の従来法に対し、新たにナノ加工技術を導入することで生体内の分子配置を模倣する点に独自性があり、従来の生物物理学のみでは成し得ない計測手法を提案した点に学術的意義を有する。また、微小管の曲げ剛性は各種疾患との関連が知られており、その運動から曲げ剛性を推定する機械学習技術は、生体モニタリングの新たな方法として社会的意義を有する。

Report

(4 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Comments on the Screening Results   Annual Research Report
  • Research Products

    (16 results)

All 2022 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (3 results) (of which Peer Reviewed: 1 results) Presentation (10 results) (of which Int'l Joint Research: 5 results) Remarks (2 results)

  • [Int'l Joint Research] University of Massachusetts/University of Wisconsin/Purdue University(米国)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Growth rate-dependent flexural rigidity of microtubules influences pattern formation in collective motion,2021

    • Author(s)
      H. Zhou, N. Isozaki, K. Fujimoto and *R. Yokokawa
    • Journal Title

      J. Nanobiotechnology

      Volume: 19 Issue: 1 Pages: 218-218

    • DOI

      10.1186/s12951-021-00960-y

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Nano-systems Driven by Motor Proteins2020

    • Author(s)
      YOKOKAWA Ryuji
    • Journal Title

      The Journal of The Institute of Electrical Engineers of Japan

      Volume: 140 Issue: 9 Pages: 585-587

    • DOI

      10.1541/ieejjournal.140.585

    • NAID

      130007893763

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Preface2020

    • Author(s)
      ENDO Tatsuro、YOKOKAWA Ryuji
    • Journal Title

      The Journal of The Institute of Electrical Engineers of Japan

      Volume: 140 Issue: 9 Pages: 577-578

    • DOI

      10.1541/ieejjournal.140.577

    • NAID

      130007893766

    • Related Report
      2020 Annual Research Report
  • [Presentation] Evaluation of the Flexural Rigidity of Microtubules with a Multilayer Perceptron Model.2022

    • Author(s)
      H. Hotta, H. Zhou, K. Fujimoto, T. I. Farhana, R. Yokokawa
    • Organizer
      Biophysical Society 66th Annual Meeting
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Pattern of Collective Motion Is Regulated by the Persistence Length of Microtubules.2022

    • Author(s)
      H. Zhou, W. Jung, T. I. Farhana, K. Fujimoto, T. Kim, R. Yokokawa
    • Organizer
      Biophysical Society 66th Annual Meeting
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 畳み込みニューラルネットワークを用いた微小管の曲げ剛性評価手法の提案.2021

    • Author(s)
      堀田 英幹, Hang Zhou, 藤本 和也, Tamanna Ishrat Farhana, 横川 隆司
    • Organizer
      化学とマイクロ・ナノシステム学会 第43回研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 畳み込みニューラルネットワークを用いた微小管の曲げ剛性評価手法の提案.2021

    • Author(s)
      堀田 英幹, Hang Zhou, 藤本 和也, Tamanna Ishrat Farhana, 横川 隆司
    • Organizer
      第38回「センサ・マイクロマシンと応用システム」シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] The Influence of Microtubule Persistence Length on Their Collective Motion2021

    • Author(s)
      H. Zhou, W. Jung, T. I. Farhana, T. Kim, R. Yokokawa
    • Organizer
      65th Biophysical Society Annual Meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of Microtubules Binary Collisions Using Nano-Patterned Kinesins2021

    • Author(s)
      T. I. Farhana, T. Kaneko, Y. Tojo, R. Yokokawa
    • Organizer
      65th Biophysical Society Annual Meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Flexural Rigidity of Microtubules Measured by Gold Stripe-Patterned Substrate2020

    • Author(s)
      H. Zhou, N. Isozaki, K. Ukita, T. L. Hawkins, J. L. Ross, R. Yokokawa
    • Organizer
      The 15th IEEE Int’l Conference on Nano/Micro Engineered and Molecular Systems (IEEE-NEMS 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 分子パターニング技術を用いた束状微小管の個別速度計測2020

    • Author(s)
      東條 裕也, 金子 泰洸ポール, Tamanna Ishrat Farhana, Hang Zhou, 横川 隆司
    • Organizer
      第37回「センサ・マイクロマシンと応用システム」シンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] Different Patterns of Collective Motion Formed by Microtubules with Various Persistence Lengths2020

    • Author(s)
      H. Zhou, Y. Tojo, T. I. Farhana, R. Yokokawa
    • Organizer
      第37回「センサ・マイクロマシンと応用システム」シンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] 階層型クラスタリングを用いた微小管集団運動の持続長による識別2020

    • Author(s)
      堀田 英幹, Hang Zhou, Tamanna Ishrat Farhana, 横川 隆司
    • Organizer
      第42回化学とマイクロナノシステム研究会
    • Related Report
      2020 Annual Research Report
  • [Remarks] 研究室HP

    • URL

      https://www.ksys.me.kyoto-u.ac.jp/

    • Related Report
      2021 Annual Research Report
  • [Remarks] 研究室HP

    • URL

      http://www.ksys.me.kyoto-u.ac.jp/

    • Related Report
      2020 Annual Research Report

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Published: 2020-04-28   Modified: 2024-01-30  

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