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Ultrasensitive and large-scale protein analysis using single molecule fluorescence gel electrophoresis

Research Project

Project/Area Number 19K15718
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 37030:Chemical biology-related
Research InstitutionKyoto University (2021-2022)
Institute of Physical and Chemical Research (2019-2020)

Principal Investigator

KIM Sooyeon  京都大学, 高等研究院, 客員研究員 (50758886)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywordsタンパク質分析 / 電気泳動 / 単一分子蛍光顕微鏡 / 一分子計測 / 一細胞解析 / ゲル電気泳動法 / プロテオーム解析 / ケミカルバイオロジ
Outline of Research at the Start

本研究では、超高感度・網羅的なタンパク質分析が実現できる「単一分子蛍光ゲル電気泳動法」を確立する。具体的には、0.3 mmの厚みの試料まで高速にスキャンできる光シート顕微鏡を用い、電気泳動によって分離されたタンパク質を単一分子レベルで蛍光検出する。その結果、従来の染色法より検出感度を3桁以上向上できる。さらに、タンパク質の活性部位と翻訳後修飾を選択的に標識できる蛍光プローブを設計し、一細胞内で1万種類以上のタンパク質の識別を目指す。

Outline of Final Research Achievements

In this study, we established single-molecule fluorescence gel electrophoresis (single-molecule PAGE) that can count various types of proteins separated by 1D electrophoresis with single-molecule sensitivity using a home-built single-molecule fluorescence microscope. Through the performance evaluation so far, we have confirmed that the detection sensitivity is improved by more than 3 orders of magnitude compared to the conventional staining method (sub-femtogram, attomolar level). In addition, based on this method, we developed single-cell fluorescence gel electrophoresis (single-cell PAGE) for single-cell proteomics analysis. As a result, at least 30 or more protein bands were detected from most of the electropherograms. Furthermore, by using the obtained band patterns, we succeeded in distinguishing different cell lines through dimensionality reduction analysis.

Academic Significance and Societal Importance of the Research Achievements

本研究で開発した「一分子蛍光ゲル電気泳動法」は、従来の染色法(CBB、銀染色など)では検出不可であったサブフェムトグラム程度の微量タンパク質を検出でき、現存するタンパク質分析法の中、最も高い感度を持っているといえる。また、「一細胞蛍光電気泳動法」は、一細胞プロテオームを調べる従来法である質量分析や抗体染色より安価かつ簡便であり、さらに、バイアスなく試料内の全タンパク質を調べられるといった利点を持っている。今後、質量分析の前段階や、臨床検査などで一細胞プロテオームを手軽に調べたいという場合に良い選択肢になる可能性が高い。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (11 results)

All 2023 2021 2020 2019

All Presentation (11 results) (of which Int'l Joint Research: 3 results,  Invited: 5 results)

  • [Presentation] 一細胞電気泳動法の開発と展開2023

    • Author(s)
      金水縁、Latiefa Kamarulzaman、谷口雄一
    • Organizer
      第45回日本光医学・光生物学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 一分子蛍光電気泳動による一細胞解析2021

    • Author(s)
      金水縁、Kamarulzaman L., 谷口雄一
    • Organizer
      第43回日本光医学・光生物学会
    • Related Report
      2021 Research-status Report
  • [Presentation] Ultrasensitive Protein Assays via Single-Molecule Imaging2021

    • Author(s)
      Kim S., Kamarulzaman L., Taniguchi Y.
    • Organizer
      Asian Photochemistry Conference 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Ultrasensitive Proteome Analysis realized by 3D Single-Molecule Imaging2021

    • Author(s)
      Kim S., Kamarulzaman L., Taniguchi Y.
    • Organizer
      Pacifichem2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 一分子蛍光電気泳動法の開発2021

    • Author(s)
      金水縁、Kamarulzaman L., 谷口雄一
    • Organizer
      第41回キャピラリー電気泳動シンポジウム
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 3D Single-Molecule Imaging-Based Bioanalyses towards Single-Cell Proteomics2021

    • Author(s)
      金水縁、Kamarulzaman L., 谷口雄一
    • Organizer
      第59回生物物理学会年会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 1分子イメージングによる超高感度タンパク質分析2021

    • Author(s)
      金水縁、谷口雄一
    • Organizer
      第42回日本光医学・光生物学会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 一分子イメージングによるバイオ分析2021

    • Author(s)
      金水縁
    • Organizer
      第27回次世代医工学研究会
    • Related Report
      2020 Research-status Report
  • [Presentation] Ultrasensitive Protein Analysis via Single-Molecule Fluorescence Gel Electrophoresis2020

    • Author(s)
      金水縁、谷口雄一、Latiefa Kamarulzaman
    • Organizer
      日本化学会第100春季年会 (千葉)
    • Related Report
      2019 Research-status Report
  • [Presentation] Single Molecule Fluorescence Gel Electrophoresis for Single Cell Proteome Analysis2019

    • Author(s)
      金水縁、谷口雄一
    • Organizer
      第41回日本光医学・光生物学会(富山)
    • Related Report
      2019 Research-status Report
  • [Presentation] Single Particle PL Microscopy Provides Valuable Insights of Photogenerated Charge Carriers2019

    • Author(s)
      Sooyeon Kim
    • Organizer
      ICoPP 2019 (Incheon, Korea)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2019-04-18   Modified: 2024-01-30  

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