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Preparation of novel nanodiscs that allow to in site analysis of membrane proteins

Research Project

Project/Area Number 16K05860
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Bio-related chemistry
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

IMURA TOMOHIRO  国立研究開発法人産業技術総合研究所, 材料・化学領域, 研究グループ長 (10371022)

Co-Investigator(Kenkyū-buntansha) 保坂 俊彰  国立研究開発法人理化学研究所, 生命機能科学研究センター, 研究員 (40462725)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsナノディスク / 膜タンパク質 / 界面活性型ペプチド / リン脂質 / 脂質二分子膜 / 両親媒性ペプチド / 界面活性剤 / 可溶化 / 生体材料
Outline of Final Research Achievements

Nanodiscs are self-assembled discoidal nanoparticles composed of scaffold lipoproteins that wrap themselves around the circumference of a lipid bilayer. It is generally accepted that nanodiscs are the simplest models of high density lipoprotein (HDL) particles that play a crucial role in reverse cholesterol transport (RCT). Nanodiscs have thus attracted considerable attention not only as a new class of potential therapeutic agents to enhance the RCT pathway but also as a useful platform capable of packaging membrane proteins.
In this study, we succeeded in controlling the size of nanodiscs using newly designed and synthesized surface-active peptides. It was also demonstrated that the peptides allow to produce the nanodisc reconstituted membrane proteins such as Acetabularia Rhodopsin II (AR II) and proteorhodopsin (PR) obtained by cell-free protein expression system in a single step.

Academic Significance and Societal Importance of the Research Achievements

微細な膜環境を有するナノディスクは、膜タンパク質の機能解析のための新しいプラットフォームとして注目されているが、その粒子径は、主にアポリポタンパク質の長さに依存するため、これまで制御することは困難であった。これに対して、本研究では独自に設計した界面活性ペプチドを用いることで、粒子径を制御することに成功した。また、無細胞合成によって発現させた多量体の膜タンパク質を、その活性を維持したまま、ナノディスク中に一段階で再構成できることを実証した。有害な界面活性剤を使用しない、本研究の“ナノディスクテクノロジー”は、生体機能の解明やバイオ医薬品の開発など、学術的のみならず産業的にもその意義は大きい。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (3 results)

All 2018 2017

All Journal Article (1 results) Presentation (2 results) (of which Invited: 1 results)

  • [Journal Article] ペプチドベース界面活性剤の特性と応用2017

    • Author(s)
      井村知弘
    • Journal Title

      オレオサイエンス

      Volume: 17 Pages: 443-447

    • Related Report
      2017 Research-status Report
  • [Presentation] 両親媒性抗菌モデルペプチドによるナノディスクの創製2018

    • Author(s)
      山本 柊成, 平 敏彰, 酒井健一, 酒井秀樹, 井村 知弘
    • Organizer
      第69回 コロイドおよび界面化学討論会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Design and Synthesis of α-Helical Amphiphilic Peptides Leading to Lipid Nanodisc Formation2017

    • Author(s)
      Tomohiro Imura、Yuri Ikeda
    • Organizer
      The 10th Anniversary of Protein & Peptide Conference (PepCon-2017)
    • Place of Presentation
      Sheraton Hotels, Fukuoka, Japan
    • Year and Date
      2017-03-23
    • Related Report
      2016 Research-status Report
    • Invited

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Published: 2016-04-21   Modified: 2022-12-28  

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