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Elucidation of molecular mechanism in ATP-depending translation activity in plant seed cells

Research Project

Project/Area Number 16K14665
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Molecular biology
Research InstitutionSaitama University

Principal Investigator

Tozawa Yuzuru  埼玉大学, 理工学研究科, 教授 (90363267)

Research Collaborator Suzuki Kakeru  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords無細胞タンパク質合成 / イネ / GTP / カルス / 翻訳 / 翻訳因子 / 植物 / コムギ / 酵母 / 蛋白質 / 生体分子 / 遺伝子 / 酵素
Outline of Final Research Achievements

In this study, we have established a new plant cell-free translation system based on rice callus extracts. We revealed that the rice cell-free system allows efficient protein expression in the absence of GTP. We confirmed generation of low level GTP from GMP, which is degradation product of mRNA by endogenous nuclease. On the other hand, By using polyuridylic acid (polyU), which contains only uridine but not guanine nucleotide, as a template, we demonstrated that translation elongation activity of the system is not affected by the lack of GTP in the reaction. This GTP-independence in the translation elongation activity is different from yeast cell-free system, and seems to be unique to plant seed cell system.

Academic Significance and Societal Importance of the Research Achievements

新たに確立したイネカルス無細胞翻訳系は、1 mlあたり数百マイクログラム相当のタンパク質合成が可能で、精製用ヒスチジンタグの利用による合成タンパク質の精製も可能であり、生化学的機能解析用のタンパク質合成系に実用化できる生産性を有すると考える。また、薬害試験の対象となるヒト心筋カリウムチャネルタンパク質hERGの合成について検証したところ、脂質二分子膜ベシクル添加条件で、hERGとその再構成促進因子との共合成により、活性型hERGの効率的再構成系の構築が可能であることを確認した。このように、確立したシステムが、創薬関連タンパク質の機能型再構成系の構築にも資することを確認できた。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (9 results)

All 2019 2018 2017

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (5 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] Novel lineage-specific transmembrane β-barrel proteins in the endoplasmic reticulum of Entamoeba histolytica2019

    • Author(s)
      Santos HJ, Imai K, Makiuchi T, Tomii K, Horton P, Nozawa A, Okada K, Tozawa Y, Nozaki T
    • Journal Title

      FEBS J

      Volume: 印刷中 Issue: 17 Pages: 3416-3432

    • DOI

      10.1111/febs.14870

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The checkpoint kinase TOR (target of rapamycin) regulates expression of a nuclear-encoded chloroplast RelA-SpoT homolog (RSH) and modulates chloroplast ribosomal RNA synthesis in a unicellular red alga2018

    • Author(s)
      Imamura Sousuke、Nomura Yuhta、Takemura Tokiaki、Pancha Imran、Taki Keiko、Toguchi Kazuki、Tozawa Yuzuru、Tanaka Kan
    • Journal Title

      Plant J

      Volume: 94 Issue: 2 Pages: 327-339

    • DOI

      10.1111/tpj.13859

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] N-myristoylation and S-acylation are common modifications of Ca2+-regulated Arabidopsis kinases and are required for activation of the SLAC1 anion channel2018

    • Author(s)
      Saito Shunya、Hamamoto Shin、Moriya Koko、Matsuura Aiko、Sato Yoko、Muto Jun、Noguchi Hiroto、Yamauchi Seiji、Tozawa Yuzuru、Ueda Minoru、Hashimoto Kenji、Koester Philipp、Dong Qiuyan、Held Katrin、Kudla Joerg、Utsumi Toshihiko、Uozumi Nobuyuki
    • Journal Title

      New Phytologist

      Volume: 218 Issue: 4 Pages: 1504-1521

    • DOI

      10.1111/nph.15053

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Mechanically stable solvent-free lipid bilayers in nano- and micro-tapered apertures for reconstitution of cell-free synthesized hERG channels.2017

    • Author(s)
      Daisuke Tadaki, Daichi Yamaura, Shun Araki, Miyu Yoshida, Kohei Arata, Takeshi Ohori, Ken-ichi Ishibashi, Miki Kato, Teng Ma, Ryusuke Miyata, Yuzuru Tozawa, Hideaki Yamamoto, Michio Niwano, and Ayumi Hirano-Iwata
    • Journal Title

      Scientific Report

      Volume: 7 Issue: 1 Pages: 17736-17736

    • DOI

      10.1038/s41598-017-17905-x

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Cell-free translation system: a tool for producing proteinous nanomachines2019

    • Author(s)
      Yuzuru Tozawa
    • Organizer
      10th International Workshop on Nanostructures & Nanoelectronics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ポリイソプレン鎖合成系の完全インビトロ再構成を目指して2019

    • Author(s)
      戸澤譲
    • Organizer
      第二回天然ゴム研究会「天然ゴムから考えるバイオマテリアルエンジニアリングのこれから」
    • Related Report
      2018 Annual Research Report
  • [Presentation] Proteinous nanodevise production based on in vitro translation system2019

    • Author(s)
      Yuzuru Tozawa
    • Organizer
      Okinawa Colloids 2019
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] イネ種子胚盤由来のカルスを材料とする無細胞翻訳系の構築2018

    • Author(s)
      鈴木翔、近藤久海香、松岡聡、戸澤譲
    • Organizer
      日本農芸化学会2018年度大会
    • Related Report
      2017 Research-status Report
  • [Presentation] イネ培養細胞抽出液の試験管内翻訳系の構築2017

    • Author(s)
      近藤久海香、鈴木翔、戸澤譲
    • Organizer
      第35回日本植物細胞分子生物学会大会
    • Related Report
      2017 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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