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Biogenesis of regulatory sRNAs and the role of Hfq

Research Project

Project/Area Number 25291005
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypePartial Multi-year Fund
Section一般
Research Field Molecular biology
Research InstitutionSuzuka University of Medical Science

Principal Investigator

AIBA Hiroji  鈴鹿医療科学大学, 薬学部, 教授 (20025662)

Project Period (FY) 2013-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2016: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2015: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2014: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2013: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Keywords小分子RNA / Hfq / Rho 非依存性ターミネーター / sRNA / バイオジェネシス / ターミネーターヘアピン / サイレンシング / 転写後制御 / 大腸菌 / 転写ターミネーター / ポリU配列 / サイレシング
Outline of Final Research Achievements

Molecular events at Rho-independent terminators of sRNA genes have been studied, focusing on SgrS and RyhB. The 3’-extended form of SgrS loses the Hfq-binding ability. Transcription termination is significantly enhanced under stress conditions where transcription of sRNAs is induced in intact cells. We conclude that the production of sRNAs is regulated not only at the step of transcription initiation but also at the step of transcription termination.
The roles of terminator hairpin in biogenesis of sRNAs have been studied. The extension of the hairpin stem leads to generation of heterogeneous transcripts in which the polyU tail is shortened. The transcripts with shortened polyU tails no longer bind to Hfq and lose the ability to repress the target mRNAs. The generation of shortened transcripts is caused by premature transcription termination. We conclude that the terminator structure of sRNA genes is optimized to generate functional sRNAs.

Report

(5 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Annual Research Report
  • 2014 Annual Research Report
  • 2013 Annual Research Report
  • Research Products

    (17 results)

All 2017 2016 2015 2014 2013

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (15 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Inhibition of Phagocytic Killing of Escherichia coli in Drosophila Hemocytes by RNA Chaperone Hfq.2016

    • Author(s)
      Shiratsuchi, A., Nitta, M., Kuroda, A., Komiyama, C., Gawasawa, M., Shimamoto, N., Tuan, T. Q., Morita, T., Aiba, H.,and Nakanishi, Y.
    • Journal Title

      J. Immunol.

      Volume: 197 Issue: 4 Pages: 1298-1307

    • DOI

      10.4049/jimmunol.1501953

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Insights into transcription termination of Hfq-binding sRNAs of Escherichia coli and characterization of read through products2015

    • Author(s)
      Teppei MORITA, Masaki UEDA, Kento KUBO, and Hiroji AIBA
    • Journal Title

      RNA

      Volume: 21 Issue: 8 Pages: 1490-1501

    • DOI

      10.1261/rna.051870.115

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] 大腸菌小分子RNA生合成におけるターミネーターヘアピンの意義2017

    • Author(s)
      森田 鉄兵、西野 良、饗場 弘二
    • Organizer
      第11回長野ミーティング
    • Place of Presentation
      ラフォーレ倶楽部白馬八方 (長野県白馬村)
    • Year and Date
      2017-01-23
    • Related Report
      2016 Annual Research Report
  • [Presentation] Hfq結合型small RNAの機能構造の解析2016

    • Author(s)
      森田 鉄兵、饗場 弘二
    • Organizer
      日本進化学会第18回大会
    • Place of Presentation
      東京工業大学大岡山キャンパス (東京)
    • Year and Date
      2016-08-25
    • Related Report
      2016 Annual Research Report
  • [Presentation] Rho-independent terminator of Hfq-binding sRNAs genes is suitably organized to generate functional sRNAs under stress condition in E. coli.2016

    • Author(s)
      Teppei Morita, Ryo Nishino and Hiroji Aiba
    • Organizer
      The 21st Annual Meeting of the RNA Society, The RNA Society of Japan 18th Annual Meeting
    • Place of Presentation
      Kyoto International Conference Center (Kyoto, Japan)
    • Year and Date
      2016-06-28
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 大腸菌Hfq結合型sRNA遺伝子のRho非依存的ターミネーターは機能的なsRNAを産生するのに適した構成である2016

    • Author(s)
      森田 鉄兵、西野 良、饗場 弘二
    • Organizer
      第13回21世紀大腸菌研究会
    • Place of Presentation
      グリーンピア南阿蘇(熊本県阿蘇郡)
    • Year and Date
      2016-06-02
    • Related Report
      2016 Annual Research Report
  • [Presentation] 大腸菌小分子RNAによるmRNA抑制に関わる因子の探索系の構築2015

    • Author(s)
      饗場弘二、森田鉄兵
    • Organizer
      第52回日本細菌学会中部支部総会
    • Place of Presentation
      名古屋市立大学医学部(愛知)
    • Year and Date
      2015-10-23
    • Related Report
      2015 Annual Research Report
  • [Presentation] 大腸菌Hfq結合性小分子RNA遺伝子の転写終結、及び転写終結領域の読み飛ばし産物の解析2015

    • Author(s)
      饗場弘二、上田真煕、久保健人、森田鉄兵
    • Organizer
      第17回日本RNA学会年会
    • Place of Presentation
      ホテルライフォート札幌 (北海道)
    • Year and Date
      2015-07-15
    • Related Report
      2015 Annual Research Report
  • [Presentation] Modulation of transcription termination of Hfq-binding sRNA genes and nature of 3’ extended sRNAs2015

    • Author(s)
      饗場弘二、森田鉄兵、上田真煕、久保建人
    • Organizer
      第9回 長野ミーティング:生物資源の有効利用を目指して
    • Place of Presentation
      ラフォーレ倶楽部白馬八方(長野県白馬村)
    • Year and Date
      2015-01-25 – 2015-01-28
    • Related Report
      2014 Annual Research Report
  • [Presentation] Biotin修飾RNAとstreptavidin磁気ビーズを用いたin vitro RNA結合実験系の構築2015

    • Author(s)
      饗場弘二、森田鉄兵、上田真煕、久保建人
    • Organizer
      第9回 長野ミーティング:生物資源の有効利用を目指して
    • Place of Presentation
      ラフォーレ倶楽部白馬八方(長野県白馬村)
    • Year and Date
      2015-01-25 – 2015-01-28
    • Related Report
      2014 Annual Research Report
  • [Presentation] sRNAの機能構造から明らかになったsRNA遺伝子の新規発現制御機構2014

    • Author(s)
      饗場弘二、森田鉄兵
    • Organizer
      第67回日本細菌学会九州支部会
    • Place of Presentation
      城山観光ホテル(鹿児島県鹿児島市)
    • Year and Date
      2014-09-05 – 2014-09-06
    • Related Report
      2014 Annual Research Report
  • [Presentation] 大腸菌小分子RNA遺伝子の転写終結制御2014

    • Author(s)
      饗場弘二、森田鉄兵、近藤良樹、松井香予
    • Organizer
      第16回日本RNA学会年会
    • Place of Presentation
      ウインクあいち(愛知県名古屋市)
    • Year and Date
      2014-07-23 – 2014-07-25
    • Related Report
      2014 Annual Research Report
  • [Presentation] 大腸菌小分子RNA遺伝子の転写終結制御2014

    • Author(s)
      饗場弘二、森田鉄兵、近藤良樹、松井香予
    • Organizer
      第11回21世紀大腸菌研究会
    • Place of Presentation
      ホテル大観(岩手県盛岡市)
    • Year and Date
      2014-06-05 – 2014-06-06
    • Related Report
      2014 Annual Research Report
  • [Presentation] Molecular events at Rho-independent terminator of sRNA gene and the nature of 3’ extended sRNAs in intact cells.2013

    • Author(s)
      Hiroji AIBA,Teppei MORITA, Hironori Otaka, Hirokazu Ishikawa
    • Organizer
      3rd International Conference on Regulating with RNA in Bacteria.
    • Place of Presentation
      Wurzburg, Germany
    • Related Report
      2013 Annual Research Report
  • [Presentation] 大腸菌小分子RNA遺伝子における転写終結、及び3’末端が伸長したsRNAの機能解析2013

    • Author(s)
      饗場弘二、森田鉄兵、大鷹弘紀、石川博一
    • Organizer
      第10回21世紀大腸菌研究会
    • Place of Presentation
      静岡、ラフォーレ修善寺
    • Related Report
      2013 Annual Research Report
  • [Presentation] 大腸菌小分子RNA遺伝子における転写終結、及び3’末端が伸長したsRNAの機能解析2013

    • Author(s)
      饗場弘二、森田鉄兵、大鷹弘紀、石川博一
    • Organizer
      第15回日本RNA学会年会
    • Place of Presentation
      愛媛、ひめぎんホール
    • Related Report
      2013 Annual Research Report
  • [Presentation] Hfq結合性small RNAによる翻訳とmRNAの安定性の調節2013

    • Author(s)
      饗場弘二
    • Organizer
      遺伝研研究集会「大腸菌ゲノム転写研究全体像の分析と転写データベース構築」
    • Place of Presentation
      三島、国立遺伝学研究所
    • Related Report
      2013 Annual Research Report

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Published: 2013-05-21   Modified: 2019-07-29  

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