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Dephosphorylation of SREBP1c by protein phosphatase PPM1L

Research Project

Project/Area Number 19K09016
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 54040:Metabolism and endocrinology-related
Research InstitutionTohoku University

Principal Investigator

Kobayashi Takayasu  東北大学, 動物・遺伝子実験支援センター, 准教授 (10221970)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywordsprotein phosphatase / PPM1L / プロテインホスファターゼ
Outline of Research at the Start

体内への脂肪の過剰な蓄積は、糖尿病、脂質異常症、高血圧などの生活習慣病に共通する要因であり,そのプロセスの解明は、これらの疾患の予防を考える上で重要である。近年、量的形質遺伝子座(QTL)解析の手法により、プロテインホスファターゼ PPM1Lが新規の代謝異常・肥満関連遺伝子として報告された。本研究課題では、代謝異常形質の形成におけるプロテインホスファターゼPPM1Lの関与を、脂質合成系の重要な転写因子であるSREBP1cに着目して明らかにすることで、肥満や糖尿病など関連疾患の予防・治療の基礎知見となりうる有用な情報の提示をめざしてゆく。

Outline of Final Research Achievements

Obesity is a significant risk factor for diabetes and cardiovascular diseases. In an earlier study using quantitative trait loci (QTL) analysis in mice, protein phosphatase PPM1L was identified as a gene related to obesity and other metabolic syndrome traits (Chen et al., 2008), but the underlying mechanism remains unclear. In this study, Thr402 of SREBP1c, which is involved in the ubiquitin-dependent degradation of SREBP, was efficiently dephosphorylated by PPM1L in vitro. In addition, PPM1L KO cells showed enhanced attachment to the culture dish. This is probably due to the enhanced expression of integrins. In PPM1L KO cells, phosphorylation of Smad2 was enhanced, suggesting that PPM1L is involved in regulating TGFβ/Smad pathway.

Academic Significance and Societal Importance of the Research Achievements

肥満は、糖尿病や脂質異常症、高血圧症、心血管疾患などの多くの疾患の原因となるため、その予防は健康な生活を送る上で重要である。本研究では、脂質代謝に関わる重要な因子であるSREBP1c の調節にタンパク質脱リン酸化酵素であるPPM1Lが関わる可能性を示すことができ、生活習慣病の予防に資することが期待できる。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (6 results)

All 2021 2019

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Time-Series Transcriptome Analysis Reveals the miR-27a-5p-<i>Ppm1l</i> Axis as a New Pathway Regulating Macrophage Alternative Polarization After Myocardial Infarction2021

    • Author(s)
      Shinichi Goto , Genki Ichihara , Yoshinori Katsumata , Seien Ko , Atsushi Anzai, Kohsuke Shirakawa, Jin Endo, Masaharu Kataoka , Hidenori Moriyama , Takahiro Hiraide, Hiroki Kitakata , Takayasu Kobayashi, Keiichi Fukuda , Motoaki Sano
    • Journal Title

      Circulation Journal

      Volume: 85 Issue: 6 Pages: 929-938

    • DOI

      10.1253/circj.CJ-20-0783

    • NAID

      130008043200

    • ISSN
      1346-9843, 1347-4820
    • Year and Date
      2021-05-25
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effect of glycosaminoglycan structure on all-trans-retinoic acidinduced neural differentiation of P19 embryonal carcinoma cells2021

    • Author(s)
      Kakizaki, I. Kobayashi, T. Tamura, S. Akagi, H. Takagaki, K.
    • Journal Title

      Biochem. .Biophy. Res. Comm.

      Volume: 570 Pages: 169-174

    • DOI

      10.1016/j.bbrc.2021.07.012

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] A heterozygous deficiency in protein phosphatase Ppm1b results in an altered ovulation number in mice2019

    • Author(s)
      Ishii Naoki、Homma Takujiro、Watanabe Ren、Kimura Naoko、Ohnishi Motoko、Kobayashi Takayasu、Fujii Junichi
    • Journal Title

      Molecular Medicine Reports

      Volume: 19 Pages: 5353-5360

    • DOI

      10.3892/mmr.2019.10194

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] BioID(近位依存性ビオチン標識)法を用いたプロテインホスファターゼPPMファミリーの相互作用タンパク質探索の試み2019

    • Author(s)
      小林 孝安, 菅野 新一郎, 安井 明
    • Organizer
      日本生化学会東北支部第85回例会・シンポジウム
    • Related Report
      2019 Research-status Report
  • [Presentation] 近位依存性ビオチン標識 (BioID)法を用いたプロテインホスファターゼPPMファミリーの相互作用タンパク質探索の試み2019

    • Author(s)
      小林 孝安, 菅野 新一郎, 安井 明
    • Organizer
      第92回日本生化学会大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Effect of glycosaminoglycans on retinoic acid-induced neural differentiation of P19 embryonal carcinoma cells2019

    • Author(s)
      Kakizaki, I., Kobayashi, T., Tamura, S. , Takagaki, K.
    • Organizer
      11th International Conference on Proteoglycans
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2024-01-30  

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