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Study of gene regulatory network for cellular magnesium ion homeostasis.

Research Project

Project/Area Number 20K21381
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 43:Biology at molecular to cellular levels, and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

ITO KOICHI  東京大学, 大学院新領域創成科学研究科, 教授 (10262073)

Project Period (FY) 2020-07-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2020: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywordsマグネシウムイオン / 恒常性維持機 / 細胞内ネットワーク / 大腸菌遺伝学 / 膜輸送体 / 恒常性維持機構
Outline of Research at the Start

細胞内で大半のMg2+をプールしているMg2+貯蔵体は、そもそもセントラルドグマにおける生体高分子合成基質・エネルギーソース(ヌクレオチド3リン酸)や、合成装置そのもの(リボソーム)であるため、合成装置それ自身の産生も厳密にコントロールされていることが予想される。従って、これらの解明のために、【1】Mg2+恒常性維持に関わる分子群の網羅的探索【2】Mg2+濃度と各種分子装置の合成・活性制御における動態解析、それぞれの研究計画を実施し結果を統合することで細胞内Mg2+恒常性維持ネットワーク機構の解明を行なう。

Outline of Final Research Achievements

Magnesium (Mg2+) is a particularly important divalent metal cation involved in a wide range of intracellular processes, from the functional expression of nucleic acids and proteins to the realization of catalytic functions. However, many of the molecular mechanisms underlying the maintenance of its intracellular concentration homeostasis remain unknown. This study identified a large number of suppressor mutants from a high-Mg2+ requirement strain of Escherichia coli and performed whole-genome analysis using NGS, revealing a large number of novel factors involved in Mg2+ homeostasis and their functional networks. This has revealed the overall picture of the molecular mechanism network that contributes to intracellular Mg2+ homeostasis, which was previously unknown.

Academic Significance and Societal Importance of the Research Achievements

マグネシウムイオン(Mg2+)は、生命機能維持に必須となる特別な金属イオンです。生物は細胞内のMg2+を一定に保つ仕組みを備えていますが、その仕組みは未解明でした。本研究は大腸菌を用いた解析により多数の新規因子の同定に成功しました。この研究成果は生命機能に密接な役割をもつMg2+に関する原始生命の起源解明やさらにはMg2+の恒常性に関する疾患に対処する創薬戦略の基盤になることが期待できます。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (2 results)

All 2023 2022

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results)

  • [Journal Article] Novel Mg2+ binding sites in the cytoplasmic domain of the MgtE Mg2+ channels revealed by X-ray crystal structures2023

    • Author(s)
      Wang Mengqi、Zhao Yimeng、Hayashi Yoshiki、Ito Koichi、Hattori Motoyuki
    • Journal Title

      Acta Biochimica et Biophysica Sinica

      Volume: - Issue: 4 Pages: 683-690

    • DOI

      10.3724/abbs.2023067

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Mutagenesis Analysis of GMN Motif in Arabidopsis thaliana Mg2+ Transporter MRS2-12022

    • Author(s)
      Yang Xiaoyu、Kobayashi Natsuko I、Hayashi Yoshiki、Ito Koichi、Moriwaki Yoshitaka、Terada Tohru、Shimizu Kentaro、Hattori Motoyuki、Iwata Ren、Suzuki Hisashi、Nakanishi Tomoko M、Tanoi Keitaro
    • Journal Title

      Bioscience, Biotechnology, and Biochemistry

      Volume: - Pages: 870-874

    • DOI

      10.1093/bbb/zbac064

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed

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Published: 2020-08-03   Modified: 2025-01-30  

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