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Basic mechanism of how variation in the genome alters transcriptome

Research Project

Project/Area Number 17K19358
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Research Field Molecular and Genome biology and related fields
Research InstitutionKyoto Prefectural University

Principal Investigator

Obokata Junichi  京都府立大学, 生命環境科学研究科, 教授 (50185667)

Research Collaborator SATOH Soichirou  
MATSUO Mitsuhiro  
HATA Takayuki  
KAZAMA Mei  
HAYAKAWA Chihiro  
NISHIMON Kohei  
YAMAGUCHI Fumika  
KAWAGUCHI Kohei  
Project Period (FY) 2017-06-30 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2018: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2017: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Keywordsゲノム変動 / トランスクリプトーム / 転写開始点 / クロマチンリモデリング / DNA修復 / クロマチン修復 / ヒストン修飾 / プロモータートラッピング / トランスクリプトーム変動 / DNA切断 / 新規転写 / ヒストンアセチル化酵素 / ヒストン脱アセチル化酵素 / 遺伝子転移 / 転写活性化 / プロモーター新生 / エピジェネティックス / クロマチン / DNA2本鎖切断
Outline of Final Research Achievements

Although genome shuffling by recombination and mobile element transposition have a potential to generate transcriptional units, we still have little knowledge about how such variation in the genome alters transcriptome. To address this question, we attempted a massive promoter trap experiment using a promoter-less luciferase gene in the plant genome. Contrary to the widely accepted idea, transcriptional activation of the LUC transgenes occurred independently of the sequence properties of the integration sites but occurred stochastically. This indicates that some factors besides genomic sequence play critical roles in causing the alteration of transcription. We further found that the mutation in histone modification enzymes greatly alters the expression level of above de novo transcripts but influence little on the intrinsic genes. These results suggest chromatin remodeling following the DNA double strand break repair should play an important role in altering the transcriptome.

Academic Significance and Societal Importance of the Research Achievements

今回の研究で得られた知見は、真核生物界でみられる進化や遺伝子新生などの背景には、ゲノムDNAの切断修復に伴うクロマチンのリモデリングが関与していることを示唆しており、「DNAの切断修復と転写活性化の関係」という進化分子生物学の根本原理に関わる新しい研究領域に光をあてる研究、言い換えれば、新しい研究領域を切り拓く研究である。また、これらの研究によって得られる一連の知見は、生物進化の原理だけでは無く、ゲノム中に人為的に挿入された外来遺伝子の活性化メカニズムにも強く関係しており、その意味で、遺伝子操作技術の安全性評価の理論面にも今後大きな影響を与える可能性がある。

Report

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

    (11 results)

All 2019 2018 2017 Other

All Presentation (10 results) (of which Int'l Joint Research: 3 results,  Invited: 3 results) Remarks (1 results)

  • [Presentation] Characterization of the de novo activated transcription start sites in the Arabidopsis genome2019

    • Author(s)
      Takayuki Hata, Soichirou Satoh, Naoto Takda, Chihiro Hayakawa, Mei Kazama, Makoto Tachikawa, Mitsuhiro Matsuo, Sergei Kushnir, Junichi Obokata
    • Organizer
      第61回日本植物生理学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] How EGT/HGT occurs from the time scale of molecules to the evolution2019

    • Author(s)
      Junichi Obokata
    • Organizer
      The 14th International Colloquium in Endocytobiology and Symbiosis in Lille, France
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Genome-wide analysis of transcriptional activation of foreign DNA in Arabidopsis thaliana2018

    • Author(s)
      Takayuki Hata, Soichirou Satoh, Naoto Takda, Chihiro Hayakawa, Mei Kazama, Makoto Tachikawa, Mitsuhiro Matsuo, Sergei Kushnir, Junichi Obokata
    • Organizer
      第51回植物バイテクシンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] 遺伝子の水平転移はどのように生じるのか ー分子の時間から進化の時間までー2018

    • Author(s)
      小保方潤一
    • Organizer
      第2回日本共生生物学会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 細胞内共生進化における転移遺伝子の活性化モデル2018

    • Author(s)
      畑貴之、佐藤壮一郎、高田直東、風間明、早川千明、立川誠、松尾充啓、Sergei Kushnir, 小保方潤一
    • Organizer
      第2回日本共生生物学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Genome-wide analysis of de novo originated transcription start site in the Arabidopsis genome2018

    • Author(s)
      Takayuki Hata, Soichirou Satoh, Naoto Takda, Chihiro Hayakawa, Mei Kazama, Makoto Tachikawa, Mitsuhiro Matsuo, Sergei Kushnir, Junichi Obokata
    • Organizer
      第41回日本分子生物学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Experimental evolution approach reveals stochastic behavior of transcriptional activation of transgenes in plant genome.2018

    • Author(s)
      Hata T., Satoh S., Takada N., Hayakawa C., Kazama M., Tachikawa M., Matsuo M,, Kushnir S., Obokata J
    • Organizer
      第59回日本植物生理学会年会、 2018年3月、札幌
    • Related Report
      2017 Research-status Report
  • [Presentation] Lessons from two unique model systems: how horizontal and encosymbiotic gene transfer occurs.2017

    • Author(s)
      Obokata, J.
    • Organizer
      XVIII Annual meeting of the International Society of Endocytobiology German section. September 2017, Konstanz, Germany
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Molecular basis of EGT and HGT: How bacterial transgenes express in the eukaryotic genome?2017

    • Author(s)
      Hata T., Satoh S., Takada N., Hayakawa C., Kazama M., Uchikoba T., Tachikawa M., Matsuo M,, Kushnir S., Obokata J.,
    • Organizer
      Taiwan-Japan Plant Biology 2017  2017年11月, 台北(台湾)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Molecular basis of transcriptional activation of transgenes: How the genome fluctuation influences its trasncriptome?2017

    • Author(s)
      Hata T., Satoh S., Takada N., Uchikoba T., Tachikawa M., Matsuo M,, Kushnir S., Obokata J.
    • Organizer
      2017年度生命科学系学会合同年次大会(ConBio2017)2017年12月、神戸
    • Related Report
      2017 Research-status Report
  • [Remarks] 京都府立大学・生命環境科学研究科・植物ゲノム情報学研究室

    • URL

      https://www2.kpu.ac.jp/life_environ/plant_genome_bio/Site/Top.html

    • Related Report
      2018 Annual Research Report

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Published: 2017-07-21   Modified: 2020-03-30  

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