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2013 Fiscal Year Final Research Report

Comprehensive identification of abnormally spliced RNAs and elucidation of their significance

Research Project

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Project/Area Number 23510234
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Genome biology
Research InstitutionKobe University

Principal Investigator

SAKAMOTO Hiroshi  神戸大学, 理学(系)研究科(研究院), 教授 (00187048)

Co-Investigator(Kenkyū-buntansha) INOUE Kunio  神戸大学, 大学院理学研究科, 教授 (40252415)
NAKAI Kenta  東京大学, 医科学研究所, 教授 (60217643)
SUZUKI Yutaka  東京大学, 大学院新領域創成科学研究科, 教授 (40323646)
Project Period (FY) 2011 – 2013
KeywordsmRNA品質管理 / 生殖細胞 / エキソン連結部複合体 / 細胞質スプライシング
Research Abstract

In Y14(RNAi) and mag-1(RNAi) animals, unspliced tra-2 RNA is leaked to the cytoplasm and unusually spliced to tra-2s RNA by the cytoplasmic splicing enzyme IRE-1. The protein produced from tra-2s RNA acts dominant-negatively against normal TRA-2 protein because transgenic animals expressing TRA-2s protein showed germline masculinization like Y14(RNAi) animals. Interestingly, the leakage of unspliced RNA caused by the inhibition of Y14 or MAG-1 was also observed for almost all genes examined so far. Moreover, inhibition of eIF4AIII and SAP130 also caused leakage of unspliced RNA to the cytoplasm. Double RNAi analysis indicated that Y14 interacts with both SAP130 and two other splicing-related factors. These results suggest that the EJC core subunits associate with pre-mRNA and function as the gatekeeper to watch and block premature export of unspliced RNA, thereby contributing to mRNA quality control in C. elegans.

  • Research Products

    (7 results)

All 2013 2012 2011 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (4 results) Remarks (2 results)

  • [Journal Article] A specific set of exon junction complex subunits is required for the nuclear retention of unspliced RNAs in Caenorhabditis elegans2013

    • Author(s)
      Masami Shiimori, Kunio Inoue & Hiroshi Sakamoto
    • Journal Title

      Mol. Cell. Biol

      Volume: 33 Pages: 444-456

    • DOI

      10.1128/MCB.01298-12

    • Peer Reviewed
  • [Presentation] 線虫 EJC 中核因子 Y14はスプライシング未完了 RNA の核外輸送を防ぐ2012

    • Author(s)
      椎森仁美、井上邦夫、坂本博
    • Organizer
      第14回日本 RNA 学会年会
    • Year and Date
      20120718-20
  • [Presentation] EJC core subunits have a novel gatekeeper function in mRNA quality control in the nematode C. elegans2012

    • Author(s)
      Masami Shiimori, Kunio Inoue & Hiroshi Sakamoto
    • Organizer
      The 22th CDB Meeting - RNA Sciences in Cell and Developmental Biology II
    • Place of Presentation
      理研神戸CDB
    • Year and Date
      20120611-13
  • [Presentation] 線虫 Y14はイントロンを含む未スプライシング RNA の核外輸送を防ぐ2011

    • Author(s)
      椎森仁美、井上邦夫、坂本博
    • Organizer
      RNA フロンティアミーティング2011
    • Place of Presentation
      あいち健康プラザ
    • Year and Date
      20110830-0901
  • [Presentation] Two EJC core subunits, Y14 and MAG-1, have a novel gatekeeper function in mRNA quality control in the nematode C. elegans2011

    • Author(s)
      Masami Shiimori, Shunichi Wakabayashi, Yutaka Suzuki, Kenta Nakai, Kunio Inoue & Hiroshi Sakamoto
    • Organizer
      The16th annual Meeting of the RNA Society
    • Place of Presentation
      京都国際会館
    • Year and Date
      20110614-18
  • [Remarks] ホームページ等

    • URL

      http://www.edu.kobe-u.ac.jp/fsci-biol/faculty/sakamoto.html

  • [Remarks] ホームページ等

    • URL

      http://www.research.kobe-u.ac.jp/fsci-rna/

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Published: 2015-07-16  

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