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Division of cellular function of nuclear transport pathways

Research Project

Project/Area Number 21H02482
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 44010:Cell biology-related
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Imamoto Naoko  国立研究開発法人理化学研究所, 開拓研究本部, 主任研究員 (20202145)

Co-Investigator(Kenkyū-buntansha) 木村 誠  国立研究開発法人理化学研究所, 開拓研究本部, 専任研究員 (00290891)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2023: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2021: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Keywords核-細胞質間輸送 / Importin beta / Importin alpha / 基質特異的認識 / 細胞機能 / タンパク質の熱感受性 / Importin α / Importin β / プロテオミクス / 核ー細胞質間輸送 / タンパク質の熱安定性 / 細胞機能制御 / evolutionary trace / 定量的プロテオミクス
Outline of Research at the Start

核-細胞質間輸送は、真核生物では遺伝子機能制御の要である。ヒト細胞で発現する全タンパク質のおよそ35%にも及ぶ膨大な分子種を、20を超える多彩な核-細胞質間輸送経路が分担して核と細胞質の間を輸送している。本研究では、一次構造上の相同性が高いにもかかわらず共通基質が少ないImportin-13とTransportin-SRに着目して、各運搬体が多様な基質をオーバーラップせずに認識する仕組みを調べる。また、老化などの細胞機能変化で発現変化するImportinβファミリーと物理化学的特性が違うImportinαファミリーに着目して、輸送経路の細胞内役割分担と細胞機能を制御する仕組みを明らかにする。

Outline of Final Research Achievements

Nucleocytoplasmic transport plays an important role to regulate eukaryotic gene function. Large scale identification of transport cargoes of Importin β family members (NTRs) has revealed that each NTRs show division of roles. At the same time, a single NTRs can carry large number of transport cargoes that do not share consensus sequences. In this study, we analyzed (i) a possible mechanistics of individual NTR that recognize diverse cargoes, (ii) physiological significance of diversity of transport pathways using cellular model systems of development and inducing senescent (iii) different thermo-sensitivities of the 7 Importin α subfamily members, which is an Importin β -specific adaptor molecules, and mechanistic of how cells maintain the importin α. The goal of this study was to elucidate the mechanism by which the diversity of transport pathways regulates cell function.

Academic Significance and Societal Importance of the Research Achievements

核と細胞質の隔たりは真核生物の基礎であり、その隔たりを制御するのが核膜孔を介した核-細胞質間輸送である。輸送の基本メカニズムが明らかにされる一方で、基本的な問題がわかっていない事項も少なくない。本研究では一つの運搬体分子が多くの基質分子を認識できる機序の解析をした。その結果、運搬体と基質の特異性決定は予想以上に複雑であることがわかり、タンパク質科学一般にも及ぶ新たな問題点を投じることになった。また、輸送システムによる分化発生や老化誘導の制御メカニズムが具体的に明らかになれば、基礎の生命科学に新たな視点が付与される。また、これまで意識されてこなかった創薬のシーズを将来的に提供できると期待する。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (26 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (2 results) Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (16 results) (of which Int'l Joint Research: 4 results,  Invited: 7 results) Remarks (2 results) Patent(Industrial Property Rights) (1 results) (of which Overseas: 1 results)

  • [Int'l Joint Research] National Cheng Kung University(タイ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Pohang University(韓国)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Lack of Hikeshi activates HSF1 activity under normal conditions and disturbs the heat-shock response.2022

    • Author(s)
      Kose, S., Imai, K., Watanabe, A., Nakai, A., Suzuki, Y., Imamoto, N.
    • Journal Title

      Life Sci. Alliance

      Volume: 5 Issue: 9 Pages: e202101241-e202101241

    • DOI

      10.26508/lsa.202101241

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Methods to separate nuclear soluble fractions reflecting localizations in living cells2021

    • Author(s)
      Ogawa Yutaka、Imamoto Naoko
    • Journal Title

      iScience

      Volume: 24 Issue: 12 Pages: 103503-103503

    • DOI

      10.1016/j.isci.2021.103503

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Stochastic chromatin packing of 3D mitotic chromosomes revealed by coherent X-rays2021

    • Author(s)
      Sung Daeho、Lim Chan、Takagi Masatoshi、Jung Chulho、Lee Heemin、Cho Do Hyung、Shin Jae-Yong、Ahn Kangwoo、Hwang Junha、Nam Daewoong、Kohmura Yoshiki、Ishikawa Tetsuya、Noh Do Young、Imamoto Naoko、Jeon Jae-Hyung、Song Changyong
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 118 Issue: 46

    • DOI

      10.1073/pnas.2109921118

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Distinct mutations in importin-β family nucleocytoplasmic transport receptors transportin-SR and importin-13 affect specific cargo binding2021

    • Author(s)
      Kimura M, Imai K, Morinaka Y, Hosono-Sakuma Y, Horton P, Imamoto N
    • Journal Title

      Sci Rep.

      Volume: 11 Issue: 1 Pages: 15649-15649

    • DOI

      10.1038/s41598-021-94948-1

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The intrinsically disordered N‐terminal region of mouse DNA polymerase alpha mediates its interaction with POT1a/b at telomeres2021

    • Author(s)
      Mizuno Takeshi、Hirabayashi Kei、Miyazawa Sae、Kobayashi Yurika、Shoji Kenta、Kobayashi Masakazu、Hanaoka Fumio、Imamoto Naoko、Torigoe Hidetaka
    • Journal Title

      Genes to Cells

      Volume: 26 Issue: 6 Pages: 360-380

    • DOI

      10.1111/gtc.12845

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Diversity of nucleocytoplasmic transport pathways2024

    • Author(s)
      Naoko Imamoto
    • Organizer
      RIKEN International Symposium on Nuclear Structure and Function
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 核内輸送因子Importinαの熱感受性による核-細胞質間輸送制御2023

    • Author(s)
      小川泰、今本尚子
    • Organizer
      第 46回 日本分子生物学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Hikeshi による分子シャペロンHSP70 の核移行とその機能2023

    • Author(s)
      小瀬真吾、渡邊愛、今本尚子
    • Organizer
      第17回日本臨床ストレス応答学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 核内輸送因子Importinαの熱感受性による核-細胞質間輸送機構の環境応答性2023

    • Author(s)
      小川泰、今本尚子
    • Organizer
      第75回 日本細胞生物学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] The Pleiotropic Nuclear-envelope Biology2022

    • Author(s)
      Naoko Imamoto
    • Organizer
      The 95th Annual Meeting of Japanese Biochemical Society
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Hikeshi regulates activity of Heat Shock Factor (HSF)1 through mediating nuclear import2022

    • Author(s)
      Naoko Imamoto & Shingo Kose
    • Organizer
      Nucleocytoplasmic Transport (NCT) Meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 核-細胞質間輸送の多様性と細胞機能2022

    • Author(s)
      今本尚子
    • Organizer
      山口大学医学部大学院セミナー
    • Related Report
      2022 Annual Research Report
  • [Presentation] HikeshiによるHSP70核輸送:温度依存性、転写制御・核タンパク質恒常性機維持における役割2022

    • Author(s)
      小瀬真吾, 渡邊愛, 今本尚子
    • Organizer
      Biothermology Workshop 2022
    • Related Report
      2021 Annual Research Report
  • [Presentation] Understanding cellular homeostasis through nuclear transport studies2022

    • Author(s)
      小瀬真吾, 今本尚子
    • Organizer
      第95回日本生化学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Hikeshiによる分子シャペロンHSP70の核輸送が適切なHSF1転写制御とタンパク質恒常性維持に重要である2022

    • Author(s)
      小瀬真吾, 渡邊愛, 今本尚子
    • Organizer
      第16回日本臨床ストレス応答学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Hikeshiによる分子シャペロンHSP70核輸送:HSF1転写制御と核タンパク質恒常性機構における役割2022

    • Author(s)
      小瀬真吾, 渡邊愛, 今本尚子
    • Organizer
      第74回日本細胞生物学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 生細胞の局在を反映した核・細胞質可溶性画分の分画法2022

    • Author(s)
      小川泰, 今本尚子
    • Organizer
      第74回日本細胞生物学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Hikeshi regulates activity of Heat Shock Factor (HSF) 1 through mediating nuclear import of Hsp70s2022

    • Author(s)
      Naoko Imamoto
    • Organizer
      14th International Conference on Nucleocytoplasmic Transport
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 核-細胞質間輸送の多様性と役割分担2021

    • Author(s)
      Shingo Kose, Naoko Imamoto
    • Organizer
      第94回日本生化学会大会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Understanding aging through nuclear transport studies2021

    • Author(s)
      Naoko Imamoto
    • Organizer
      RIKEN Aging Project Annual Meeting Online
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 核-細胞質間輸送経路の多様性と細胞機能2021

    • Author(s)
      今本尚子
    • Organizer
      2021年日本生化学会関東支部例会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Remarks] 理化学研究所 主任研究室 今本細胞核機能研究室

    • URL

      https://www.riken.jp/research/labs/chief/cell_dyn/

    • Related Report
      2021 Annual Research Report
  • [Remarks] 理化学研究所 開拓研究本部 今本細胞核機能研究室

    • URL

      http://www2.riken.jp/celldynamics/index.html

    • Related Report
      2021 Annual Research Report
  • [Patent(Industrial Property Rights)] Nuclear Fractionation2021

    • Inventor(s)
      Yutaka Ogawa
    • Industrial Property Rights Holder
      Yutaka Ogawa
    • Industrial Property Rights Type
      特許
    • Filing Date
      2021
    • Related Report
      2021 Annual Research Report
    • Overseas

URL: 

Published: 2021-04-28   Modified: 2025-03-27  

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