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Structure-guided functional analysis of membrane proteins for human iron absorption using living cells

Research Project

Project/Area Number 18K05321
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 37010:Bio-related chemistry
Research InstitutionUniversity of Hyogo

Principal Investigator

Sawai Hitomi  兵庫県立大学, 生命理学研究科, 助教 (50584851)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords鉄代謝 / 鉄還元酵素 / 鉄イオンの吸収 / ヒト腸管モデル細胞 / ヘム / 金属トランスポーター / ヘム酵素 / X線結晶構造解析 / 構造機能相関 / Caco-2-kh細胞 / 膜タンパク質 / 構造機能解析 / 鉄吸収
Outline of Final Research Achievements

Iron obtained from the diet are reduced by the transmembrane ferric reductase Dcytb, which is located in the cell membrane on the intestinal lumen side of duodenal enterocytes. The reduced iron is then transported into the enterocytes by the divalent metal ion transporter DMT1. In this project, some functional evaluation systems using living cells were established to investigate the structure-function relations of human Dcytb and to screen dietary ingredients for improvement of iron absorption. Those results indicated that the C-terminal region of Dcytb is related to the regulation of iron absorption and transport. In addition, supplementation of fructose and malic acid improved the efficiency of iron absorption. If the detailed molecular mechanisms of these new findings at the cellular-level studies are revealed, it will help improve the safety and efficiency of orally administered nutritional iron agents in the future.

Academic Significance and Societal Importance of the Research Achievements

鉄は、生命維持に必須の微量金属元素である。しかし、過剰な鉄の蓄積は活性酸素源となるため、生体内の鉄は厳密に制御されている。ヒトには制御可能な鉄の排出経路がないため、鉄の吸収調節が最も重要な過程になる。食物に含まれる鉄イオンは、十二指腸粘膜上皮細胞に局在する膜タンパク質Dcytb/DMT1の働きにより腸管から細胞内に吸収されるため、これらの機能不全は疾病の原因となる。本研究では、Dcytbの立体構造に基づく情報を生きた細胞で検証することにより、ヒトの鉄イオン吸収機構を詳細に解明することを目指した。この成果は将来的に、鉄栄養素の効率的な摂取方法や鉄代謝異常による疾病の理解につながる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (51 results)

All 2021 2020 2019 2018 Other

All Int'l Joint Research (9 results) Journal Article (8 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 8 results,  Open Access: 6 results) Presentation (28 results) (of which Int'l Joint Research: 6 results,  Invited: 11 results) Book (2 results) Remarks (4 results)

  • [Int'l Joint Research] University of Maryland(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] University of Liverpool(英国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] University of British Columbia(カナダ)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] University of Bristol/University of Liverpool(英国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] University of Maryland(米国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] University of British Columbia(カナダ)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] University of Maryland(米国)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] University of British Columbia(カナダ)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] University of Liverpool(英国)

    • Related Report
      2018 Research-status Report
  • [Journal Article] NO Dynamics in Microbial Denitrification System2021

    • Author(s)
      Tosha Takehiko、Yamagiwa Raika、Sawai Hitomi、Shiro Yoshitsugu
    • Journal Title

      Chemistry Letters

      Volume: 50 Issue: 2 Pages: 280-288

    • DOI

      10.1246/cl.200629

    • NAID

      130007986360

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Heme controls the structural rearrangement of its sensor protein mediating the hemolytic bacterial survival2021

    • Author(s)
      Nishinaga Megumi、Sugimoto Hiroshi、Nishitani Yudai、Nagai Seina、Nagatoishi Satoru、Muraki Norifumi、Tosha Takehiko、Tsumoto Kouhei、Aono Shigetoshi、Shiro Yoshitsugu、Sawai Hitomi
    • Journal Title

      Communications Biology

      Volume: 4 Issue: 1 Pages: 467-467

    • DOI

      10.1038/s42003-021-01987-5

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Integrated bio-metal science: New frontiers of bio-metal science opened with cutting-edge techniques2020

    • Author(s)
      Sawai Hitomi、Ishimori Koichiro
    • Journal Title

      Biophysics and Physicobiology

      Volume: 17 Issue: 0 Pages: 94-97

    • DOI

      10.2142/biophysico.BSJ-2020017

    • NAID

      130007919808

    • ISSN
      2189-4779
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Missing Piece of Two-Component Signal Transduction Systems Unveiled by SEC-SAXS.2019

    • Author(s)
      Hitomi Sawai, Yoshitsugu Shiro
    • Journal Title

      SPring-8/SACLA Research Frontiers 2018

      Volume: 1 Pages: 15-16

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structural basis for promotion of duodenal iron absorption by enteric ferric reductase with ascorbate.2018

    • Author(s)
      Ganasen M, Togashi H, Takeda H, Asakura H, Tosha T, Yamashita K, Hirata K, Nariai Y, Urano T, Yuan X, Hamza I, Mauk AG, Shiro Y, Sugimoto H, Sawai H.
    • Journal Title

      Communications Biology

      Volume: 1 Issue: 1 Pages: 120-120

    • DOI

      10.1038/s42003-018-0121-8

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Architecture of a Complete Two-Component Signal Transduction System: Oxygen-Sensing Proteins FixL, FixJ, and Their Complex2018

    • Author(s)
      G. S. A. Wright, A. Saeki, T. Hikima, Y. Nishizono, T. Hisano, M. Yamamoto, S. V. Antonyuk, S. S. Hasnain, Y. Shiro, H. Sawai
    • Journal Title

      Sci. Signal.

      Volume: 11 Issue: 525

    • DOI

      10.1126/scisignal.aaq0825

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Pseudomonas aeruginosa overexpression system of nitric oxide reductase for in vivo and in vitro mutational analyses2018

    • Author(s)
      Yamagiwa Raika、Kurahashi Takuya、Takeda Mariko、Adachi Mayuho、Nakamura Hiro、Arai Hiroyuki、Shiro Yoshitsugu、Sawai Hitomi、Tosha Takehiko
    • Journal Title

      Biochimica et Biophysica Acta (BBA) - Bioenergetics

      Volume: 1859 Issue: 5 Pages: 333-341

    • DOI

      10.1016/j.bbabio.2018.02.009

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Roles of N- and C-terminal domains in the ligand-binding properties of cytoglobin2018

    • Author(s)
      Hanai Shumpei、Tsujino Hirofumi、Yamashita Taku、Torii Ryo、Sawai Hitomi、Shiro Yoshitsugu、Oohora Koji、Hayashi Takashi、Uno Tadayuki
    • Journal Title

      Journal of Inorganic Biochemistry

      Volume: 179 Pages: 1-9

    • DOI

      10.1016/j.jinorgbio.2017.11.003

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] ヒトにおける鉄イオンの吸収に関わる膜タンパク質の構造機能相関と腸管細胞モデルでの機能評価系を用いた鉄イオン吸収を向上させる新たな化合物スクリーニング2021

    • Author(s)
      澤井仁美
    • Organizer
      日本薬学会第141年会 環境・衛生部会若手研究者シンポジウム~金属研究の新たな切り口:分子からヒトを対象とした研究最前線~
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] ヒトの鉄イオン吸収に関わる膜タンパク質の立体構造に基づく培養細胞を用いた機能解析2020

    • Author(s)
      澤井仁美
    • Organizer
      日本薬学会第140年会 環境・衛生部会シンポジウム~生体分子およびタンパク質との相互作用から見た生命金属動態~
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] ヒト腸管モデル細胞を用いた鉄イオンの吸収の吸収に関わる膜タンパク質の構造機能相関解析2020

    • Author(s)
      澤井仁美
    • Organizer
      新学術領域研究「生命金属科学」第4回領域会議
    • Related Report
      2020 Annual Research Report
  • [Presentation] 溶血性連鎖球菌が宿主の血中から鉄を獲得するシステムで機能するセンサータンパク質の多機能性に関する分子機序2020

    • Author(s)
      澤井仁美
    • Organizer
      日本薬学会第140年会 環境・衛生部会若手研究者シンポジウム「生体分子およびタンパク質との相互作用から見た生命金属動態」
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 病原菌の鉄獲得システムで機能するヘムセンサー蛋白質の多機能性とその構造的機序2019

    • Author(s)
      澤井仁美
    • Organizer
      第19回日本蛋白質科学会年会/第71回日本細胞生物学会大会合同年次大会ワークショップ「生命金属とタンパク質による細胞機能の協奏的制御」
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 原子から細胞レベルの研究による鉄イオンの吸収メカニズムの理解と有効な鉄栄養強化食品成分の探索2019

    • Author(s)
      澤井仁美
    • Organizer
      第92回日本生化学会大会シンポジウム「生体内におけるSingularity Elementsとしての生体金属の利用と制御」
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Structural Basis for Enhancement of Human Iron Absorption by Duodenal Membrane Proteins with Some Dietary Metal-Chelators.2019

    • Author(s)
      Hitomi Sawai
    • Organizer
      7th International Symposium on Metallomics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 病原菌の鉄獲得システムで機能するヘムセンサータンパク質の構造機能相関の解明2019

    • Author(s)
      澤井仁美
    • Organizer
      第43回日本鉄バイオサイエンス学会学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] Structural Basis for the Transcriptional Regulation of Heme Detoxification Involved in Pathogenic Bacterial Iron Acquisition.2019

    • Author(s)
      Megumi Nishinaga, Seina Nagai, Norifumi Muraki, Satoru Nagatoishi, Kouhei Tsumoto, Shigetoshi Aono, Hiroshi Sugimoto, Yoshitsugu Shiro, Hitomi Sawai
    • Organizer
      7th International Symposium on Metallomics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 病原菌の鉄獲得システムで機能するヘムセンサー蛋白質の多機能性とその構造的機序2019

    • Author(s)
      西永惠、長井聖奈、村木則文、青野重利、杉本宏、城宜嗣、澤井仁美
    • Organizer
      第19回日本蛋白質科学会年会/第71回日本細胞生物学会大会合同年次大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 酸素センサータンパク質FixLのセンサーモジュールの構造解析2019

    • Author(s)
      鎌屋美咲、小手石泰康、當舎武彦、馬場清喜、杉本宏、城宜嗣、澤井仁美
    • Organizer
      第19回日本蛋白質科学会年会/第71回日本細胞生物学会大会合同年次大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Structural Basis for the Intramolecular Signal Transduction of Oxygen Sensor Protein FixL from Bradyrhizobium japonicum.2019

    • Author(s)
      鎌屋美咲、小手石泰康、當舎武彦、馬場清喜、杉本宏、城宜嗣、澤井仁美
    • Organizer
      日本生物物理学会第57回年会
    • Related Report
      2019 Research-status Report
  • [Presentation] 生体内金属動態の統合的研究2019

    • Author(s)
      澤井仁美
    • Organizer
      兵庫県立大学太田学長と女性研究者の集い
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 鉄吸収の分子論: 食物に含まれる鉄イオンの獲得機構を詳細に理解すること2019

    • Author(s)
      澤井仁美
    • Organizer
      第1回全学研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] 病原菌の栄養源としての鉄を感知するタンパク質の分子機構解析2019

    • Author(s)
      澤井仁美
    • Organizer
      第1回全学研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] 環境変化に応じて生命を維持するための精密機械「センサータンパク質」の仕組みを探る2019

    • Author(s)
      澤井仁美
    • Organizer
      「物質階層原理研究」&「ヘテロ界面研究」合同集会
    • Related Report
      2019 Research-status Report
  • [Presentation] Structural Basis for Enhancement of Human Iron Absorption by Duodenal Membrane Proteins with ascorbate and dietary metal chelators.2019

    • Author(s)
      Hitomi Sawai
    • Organizer
      Seminar of School of Chemistry & School of Biochemistry, University of Bristol
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 「鉄」のバイオサイエンス2019

    • Author(s)
      澤井仁美
    • Organizer
      第29回STクラブ
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] 膜タンパク質の立体構造解析における脂質の効果2019

    • Author(s)
      澤井仁美
    • Organizer
      第5回Integrated Lipidology領域会議
    • Related Report
      2018 Research-status Report
  • [Presentation] ヒトの鉄吸収機構を原子・分子⇔細胞・組織の階層で相互に理解する2018

    • Author(s)
      澤井仁美
    • Organizer
      「物質階層原理」&「ヘテロ界面研究」合同集会
    • Related Report
      2018 Research-status Report
  • [Presentation] ヒトの鉄吸収に関わる膜貫通型鉄還元酵素の立体構造に基づく生きた細胞での機能解析2018

    • Author(s)
      澤井仁美
    • Organizer
      第18回日本蛋白質科学会年会ワークショップ「金属イオンとタンパク質:その密接な関係が破綻するとき」
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Structure-guided functional analysis of human ferric reductase using living cells2018

    • Author(s)
      Hitomi Sawai
    • Organizer
      Gordon Research Conference: 2018 Chemistry and Biology of Tetrapyrroles
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] SEC-SAXS法を用いることで解明できた酸素センサータンパク質システムFixL/FixJの全体像とシグナル伝達機構2018

    • Author(s)
      澤井仁美
    • Organizer
      大阪大学蛋白質研究所セミナー/SPring-8先端利用技術ワークショップ「第2回SPring-8における蛋白質構造生物学研究の現状と将来」
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] ヒトの鉄イオン吸収に関わる膜タンパク質の立体構造を基盤とした機能と構造の相互解析2018

    • Author(s)
      澤井仁美
    • Organizer
      第42回日本鉄バイオサイエンス学会学術集会
    • Related Report
      2018 Research-status Report
  • [Presentation] ヒトの鉄吸収機構を「膜タンパク質」と「生きた細胞」の研究により相互に理解する2018

    • Author(s)
      澤井仁美
    • Organizer
      第91回日本生化学会年会ワークショップ「生体金属のMagical Powerとその研究最前線」
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] ヒトの鉄イオン吸収に関わる膜タンパク質の立体構造に基づく生きた細胞での機能解析2018

    • Author(s)
      Menega Ganasen, 藤代瞳、Xiaojing Yuan, Iqbal Hamza, 姫野誠一郎、A. Grant Mauk, 杉本宏、城宜嗣、澤井仁美
    • Organizer
      メタルバイオサイエンス研究会2018
    • Related Report
      2018 Research-status Report
  • [Presentation] Structural basis for promotion of human iron absorption by duodenal ferric reductase with ascorbate and some dietary metal-chelators2018

    • Author(s)
      Hitomi Sawai
    • Organizer
      Cold Spring Harbor Asia Meeting: Iron, Reactive Oxygen Species & Ferroptosis in Life, Death & Disease
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Structural basis for enhancement of human iron uptake by duodenal ferric reductase with ascorbate2018

    • Author(s)
      Hitomi Sawai
    • Organizer
      9th Asian Biological Inorganic Chemistry (AsBIC-9)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Book] NTS出版2021

    • Author(s)
      城宜嗣、澤井仁美、當舍武彦
    • Total Pages
      13
    • Publisher
      生命金属のダイナミクス
    • Related Report
      2020 Annual Research Report
  • [Book] Chapter 3: Haem-based Sensors of Dioxygen in Gas Sensing in Cells (Editor: Shigetoshi Aono)2018

    • Author(s)
      Hitomi Sawai, Yoshitsugu Shiro
    • Total Pages
      37
    • Publisher
      Royal Society of Chemistry
    • Related Report
      2018 Research-status Report
  • [Remarks] 兵庫県立大学大学院理学研究科細胞制御学2研究室のホームぺージ

    • URL

      https://www.sci.u-hyogo.ac.jp/life/regulation/index-j.html

    • Related Report
      2020 Annual Research Report
  • [Remarks] 研究代表者のResearch map

    • URL

      https://researchmap.jp/hitomisawai

    • Related Report
      2020 Annual Research Report
  • [Remarks] 兵庫県立大学大学院生命理学研究科細胞制御学Ⅱ研究室ホームぺージ

    • URL

      http://www.sci.u-hyogo.ac.jp/life/regulation/index-j.html

    • Related Report
      2019 Research-status Report 2018 Research-status Report
  • [Remarks] 貧血予防に新たな指針 ~ビタミンCが鉄分の吸収を促進するメカニズムを原子レベルで解明~

    • URL

      http://www.sci.u-hyogo.ac.jp/news/180820HitomiSawai.pdf

    • Related Report
      2019 Research-status Report 2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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