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組換え機構の分子的基礎

Research Project

Project/Area Number 03267102
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Research InstitutionNagoya University

Principal Investigator

堀田 康雄  名古屋大学, 理学部, 教授 (30190218)

Co-Investigator(Kenkyū-buntansha) 城石 俊彦  国立遺伝学研究所, 細胞遺伝研究系, 助手 (90171058)
柴田 武彦  理化学研究所, バイオデザイン研究グループ, 主任研究員 (70087550)
小林 一三  東京大学, 医科学研究所, 助教授 (30126057)
大坪 栄一  東京大学, 応用微生物研究所, 教授 (10158800)
小川 英行  大阪大学, 理学部, 教授 (70028207)
Project Period (FY) 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥66,600,000 (Direct Cost: ¥66,600,000)
Fiscal Year 1991: ¥66,600,000 (Direct Cost: ¥66,600,000)
Keywords減数分裂 / 突然変異体 / ホットスポット / 促進因子 / 抑制因子 / SPOmutants / recA,recD / トランスポゼ-ス
Research Abstract

減数分裂時における遺伝子組換え頻度は体細胞で起こるものの100〜1,000倍に上昇するが、そのような上昇を示さない酵母の突然変異株をその原因となる機構の面より分類し遺伝子を確認した。グル-プ1:体細胞の組換えとDNA修復に関与するもの(RAD52)、グル-プ2:同時にDNA障害修復欠損をもつもの(RAD50,MRE11)、グル-プ3:減数分裂期組換えにのみ欠損をもつもの(SPO11,HOP1,MRE2〜4)。二重変異株解析からグル-プ3→グル-プ2→グル-プ1の順に上位にあること、MRE11はRAD50の上位にあることを決めた(小川)。窒素飢餓減数分裂誘導時の特異的cDNAのクロ-ン化と分類を行いその全塩基配列を決定し(全7種)SPO^ー遺伝子とproteinase βを発見した。他の5種は新しいものであった。組換えに於てDNAの相同的対合を行うrecA蛋白の反応測定系を確立し、一本鎖DNA結合蛋白(SSB)の効果も明らかにした。多部位切断型塩基配列特異的エンドヌクレア-ゼ“Eendo SceI"がミトコンドリアで組換え開始に働くことを示した(柴田)。IS1とTn3トランスポゼ-スの解析からN末とC末がDNA転移反応に関与する機構が明らかになった(大坪)。組換えのホットスポットについて、雄減数分裂に特異的組換え抑制因子がtransの位置でも効果を示し、抑制因子が遺伝子産物として作用していることを示唆した。転写産物は精巣細胞でセントロメアからテロメアの方向に進むことをPCRにより決定した(城石)。相同組換えの機構について、「複製によって作られる二重鎖切断あるいはそれと等価な構造が非保存的組換えを促進する」ことを示し真核生物で導入遺伝子と内在遺伝子間相同組換えを解析した(小林)。真核生物の減数分裂における組換え遺伝子の種類とその実体が明らかにされ、相同染色体上のホットスポットの解析から促進因子と抑制因子の動態、それに関する実験仮説の提出があり、組換えの分子レベルでの解析が進んだ。

Report

(1 results)
  • 1991 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] Ajimura,M.,Leem,S.and Ogawa,H.: "Identification of new genes required for meiotic recombination(MRE)" Genetics. (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Leem,S.and Ogawa,H.: "The MRE4 gene encodes a novel protein kinase homologue required for meiotic recombination in Saccharomyces cerevisiae"" Nucleic acids Res.(1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Tateishi,S.Horii,T.,Ogawa,T.and Ogawa,H.: "C-terminal truncated Escherichia coli RecA protein RecA5327 has enhanced binding affinities to single- and double-stranded DNAs" J.Mol.Biol.,. 223. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Umeda,M.and Ohtsubo,E.: "Four types of IS1 with difference in nucleotide sequences reside in the Escherichia coli K-12 chromosome" Gene,. 98. 1-5 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Amemura-Maekawa,J.and Ohtsubo,E.: "Functional analysis of the two domains in the terminal inverted repeat sequence required for transposition of Tn3" Gene. 103. 11-16 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Kobayashi,I.: "Mechanisms for gene conversion and homologous recombination:The double-strand break repair model and the successive half crossing-over model" Advances in Biophysics,. 28. (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Shibata,T.,Ikeda,M.,Makino,O.and Ikawa,S.: "Monoclonal antibodies and mechanistic studies on recA protein" Biochimie. 73. 209-218 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Kawasaki,K.,Takahashi,M.,Natori,M.and Shibata,T.: "DNA sequence-recognition by a eukaryotic sequence-specific endonuclease,Endo.SceI,from Saccharomyces cerevisiae" Biol.Chem.266. 5342-5347 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Arai,N.,Kawasaki,K.and Shibata,T.: "A multi-component protein of a fission yeast which promotes joint molecule formation from homologous DNAs" J.Biol.Chem.267. 3514-3522 (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Shiroishi T.,Sagai,T.,Hanzawa,N.,Gotoh,H.and Moriwaki,K.: "Genetic control of sex-dependent recombination in the major histocompatibility complex of the mouse." EMBO J.10. 681-686 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Yamaguchi,M.,Hayashi,Y.,Hirose,F.,Matsuoka,S.,Moriuchi T.,Shiroishi,T.,Moriwaki,K.and Matsukage,A.: "Molecular cloning and structural analysis of mouse gene and pseudogenes for proliferating cell nuclear antigen." Nucleic Acids Res.19. 2403-2410 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Mishina,Y.,Ayusawa,D.,Seno,T.and Koyama: "Thymidylate stress induces homologous recombination activity in mammalian cells" Mutation Res.246. 215-220 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Hino,O.,Tabata,S.and Hotta,Y.: "Evidence for increased in vitro recombination with insertion of human hapatitis B virus DNA." Proc.Natl.Acad.Sci.USA. 88. 9248-9252 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Tabata,S.,Kobayashi,T.,Sato,S.and Hotta,Y.: "Expression of meiosis-specific genes in lily microsporoeytes." Plant Science. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Shinohara,A.,Ogawa,H.and Ogawa,T.: "Rad51 protein involved in repair and recombination in Saccharomycesa cerevisiae is a RecA-like protein" Cell. (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Ogawa,T.,Shinohara,A.,Ogawa,H.and Tomizawa,J.: "Functional structures of a protein found by chimera analysis:Cooperating segments for RecA activities" J.Mol.Biol.(1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Tabata,S.,Sato,S.and Hotta,Y. ed.Ishihama,A.and Yoshikawa,H.: "Control of meiosis.in Control of cell growth and division." Springer-Verag, 97-117(266) (1991)

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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