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Regulatory mechanism of phospholipids flippase ATP11C in non-apoptotic cells

Research Project

Project/Area Number 17K08270
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Biological pharmacy
Research InstitutionKyoto University

Principal Investigator

Takatsu Hiroyuki  京都大学, 薬学研究科, 研究員 (70360576)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsフリッパーゼ / ホスファチジルセリン / ATP11C / 極性細胞 / P4-ATPase / phosphatidylserine / uropod / PKC / エンドサイトーシス / PS露出 / ダウンレギュレーション / 細胞生物学 / リン脂質 / 生体膜
Outline of Final Research Achievements

ATP11C, a member of the P4-ATPase family, translocates phosphatidylserine (PS) and phosphatidylethanolamine at the plasma membrane. Although there are two N-terminal and three C-terminal splicing variants in human ATP11C and only latter variants in mouse ATP11C, the functional differences between isoforms have been neglected. We previously showed that the C-terminus of ATP11C-a (C1-form) is critical for its endocytosis upon PKC activation. However, C2- and C3-forms of ATP11C were not endocytosed upon PKC activation. Importantly, we found that ATP11C-b (C2-form) localized to the limited region of the plasma membrane in polarized cells, such as migrating Pro B cells and invasive breast cancer cells although ATP11C-a (C1-form) localized to the plasma membrane uniformly in either polarized or non-polarized cells. These results suggest that ATP11C-b isoform regulates the PS distribution at the distinct place of the plasma membrane in polarized cells.

Academic Significance and Societal Importance of the Research Achievements

ホスファチジルセリン(PS)の露出制御は、アポトーシス細胞など死にゆく細胞では詳しく解明されてきたが、正常な細胞での可逆的かつ一過的なものに関してはよくわかっていなかった。その中で今般、ATP11Cが重要な役割を担うことが明らかとなり、その2種類のアイソフォームで明確に局在と制御機構が異なることが明らかとなった。このことは、一つの細胞の中でも、ATP11Cの2つのアイソフォームが作用することで局所によりPSの露出制御が異なっていることを示すものである。これまで明らかにされていなかった一過的なPS露出の生理作用を解明していく上で重要な発見であると考えられる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (11 results)

All 2019 2018 2017 Other

All Int'l Joint Research (1 results) Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (5 results)

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

    • Related Report
      2019 Annual Research Report
  • [Journal Article] The cytoplasmic C-terminal region of the ATP11C variant determines its localization at the polarized plasma membrane2019

    • Author(s)
      Takayama Masahiro、Takatsu Hiroyuki、Hamamoto Asuka、Inoue Hiroki、Naito Tomoki、Nakayama Kazuhisa、Shin Hye-Won
    • Journal Title

      Journal of Cell Science

      Volume: 132 Issue: 17

    • DOI

      10.1242/jcs.231720

    • NAID

      120006731146

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Yeast and human P4-ATPases transport glycosphingolipids using conserved structural motifs.2019

    • Author(s)
      Roland, B.P., Naito, T., Best, J.T., Arinaiz-Yepez, C., Takatsu, H., Yu, R.J., Shin, H.-W., and Graham, T.R.
    • Journal Title

      Journal of Biological Chemistry

      Volume: 294 Issue: 6 Pages: 1794-1806

    • DOI

      10.1074/jbc.ra118.005876

    • Related Report
      2019 Annual Research Report 2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Substrates of P4-ATPases: beyond aminophospholipids (phosphatidylserine and phosphatidylethanolamine)2019

    • Author(s)
      Shin, H.-W. and Takatsu, H.
    • Journal Title

      FASEB Journal

      Volume: 33 Issue: 3 Pages: 3087-3096

    • DOI

      10.1096/fj.201801873r

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Phospholipid-flipping activity of P4-ATPase drives membrane curvature.2018

    • Author(s)
      Takada, N., Naito, T., Inoue, T., Nakayama, K., Takatsu, H., and *Shin, H.-W.
    • Journal Title

      The EMBO Journal

      Volume: in press Issue: 9

    • DOI

      10.15252/embj.201797705

    • NAID

      120007144982

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Phospholipid flippase ATP11C is endocytosed and downregulated following Ca<sup>2+</sup>-mediated protein kinase C activation.2017

    • Author(s)
      Takatsu H, Takayama M, Naito T, Takada N, Tsumagari K, Ishihama Y, Nakayama K, Shin HW.
    • Journal Title

      Nat Commun.

      Volume: Nov 10;8(1) Issue: 1 Pages: 1423-1423

    • DOI

      10.1038/s41467-017-01338-1

    • NAID

      120006365525

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] P4-ATPaseによるグルコシルセラミドの輸送と生理的意義2019

    • Author(s)
      高津宏之、内藤朋樹、Siddabasavegowda Bommegowda、有田誠、中山和久、申惠媛
    • Organizer
      第92回日本生化学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] リン脂質フリッパーゼATP11CのC末バリアントの特性2018

    • Author(s)
      高津宏之、高山真裕、井上寛己、中山和久、申 惠媛
    • Organizer
      第91回 日本生化学会大会
    • Related Report
      2018 Research-status Report
  • [Presentation] リン脂質フリッパーゼATP11Cとezrinの相互作用2018

    • Author(s)
      井上寛己、高津宏之、高山真裕、中山和久、申 惠媛
    • Organizer
      第91回 日本生化学会大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 非アポトーシス細胞におけるリン脂質フリッパーゼATP11Cの制御機構2017

    • Author(s)
      高津宏之、高山真裕、中山和久、申 惠媛
    • Organizer
      2017年度 生命科学系学会合同年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Functional differences between splicing variants of phospholipids flippase ATP11C2017

    • Author(s)
      Masahiro Takayama, Hiroyuki Takatsu , Kazuhisa Nakayama and Hye-Won Shin
    • Organizer
      2017年度 生命科学系学会合同年次大会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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