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Study on interaction and intracellular distribution of proteins regulating the cell cycle progression in Bacillus subtilis

Research Project

Project/Area Number 11480212
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Cell biology
Research InstitutionNARA INSTITUTE OF SCIENCE AND TECHNOLOGY

Principal Investigator

OGASAWARA Naotake  Nara Institute of Science and Technology, Graduate School of Information Science Professor, 情報科学研究科, 教授 (10110553)

Co-Investigator(Kenkyū-buntansha) KOBAYASHI Kazuo  Nara Institute of Science and Technology, Graduate School of Information Science Assistant Professor, 情報科学研究科, 助手 (70324978)
KASAHARA Yasuhiro  Nara Institute of Science and Technology, Graduate School of Information Science Assistant Professor, 情報科学研究科, 助手 (20273849)
MORIYA Shigeki  Nara Institute of Science and Technology, Graduate School of Information Science Associate Professor, 情報科学研究科, 助教授 (40191051)
朝井 計  奈良先端科学技術大学院大学, バイオサイエンス研究科, 助手 (70283934)
Project Period (FY) 1999 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥12,700,000 (Direct Cost: ¥12,700,000)
Fiscal Year 2002: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 2001: ¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2000: ¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 1999: ¥3,500,000 (Direct Cost: ¥3,500,000)
KeywordsBacillus subtilis / Chromosome replication / Chromosome segregation / DnaA protein / Initiation complex / Replisome / SpoOJ protein / SMC protein / 染色体構造 / Spo0J蛋白質 / Smc蛋白質 / 複製開始 / DnaA / 細胞周期 / フローサイトメトリー / 染色体分離 / シス配列 / FISH / 蛋白質相互作用 / 酵母2ハイブリッド系 / DNAヘリカーゼ / 細胞内局在 / GFP / SpoOJ
Research Abstract

(1) Initiation of chromosome replication starts with formation of a complex of initiator protein DnaA and the oriC sequence. Then, DNA helicase, DnaC, is loaded on the complex by the action of DnaB, DnaD and DnaI proteins. We showed that DnaI acts as a helicase loader and DnaD interact with DnaA.
(2) DnaA was distributed throughout the cytoplasm, but both DnaB and DnaI seemed to be localized near the outer or inner edges of the nucleoids at initiation of replication, together with oriC. Furthermore, DnaX (a component of DNA polymerase) foci were detected near either of the edges of the nucleoids at the onset of replication, suggesting that the replisome is recruited into oriC near either edge of the nucleoids to initiate chromosome replication in B.subtilis.
(3) We obtained results indicating that, if the DnaA level increases with progression of the replication cycle, it could act as a rate-limiting factor of replication initiation in B.subtilis. We found that SpoOJ contributes to the po … More sitioning of the chromosomal oriC region. In addition, the spoOJ mutant produced a significant proportion of cells with increased chromosome content Furthermore we demonstrated that Soj interferes with tight control of replication initiation and causes early and asynchronous initiation and SpoOJ counteracts this Soj function in wild-type cells. Additionally we found that essential GTP-binding proteins, Bex and YqeH, appeared to participate in the regulation of initiation of chromosome replication.
(4) We demonstrated that the two DNA sequences in and downstream of the dnaA gene participate in correct positioning of the replication origin region within the cell and that this function is associated with accurate chromosome segregation in B.subtilis.
(5) When visualized simultaneously, SMC and the replisome were often in similar regions of the cell. Persistence of SMC foci did not depend on ongoing replication, but did depend on ScpA and ScpB, two proteins interacting with SMC. Our results indicate that SMC is bound to many sites on the chromosome and a concentration of SMC is localized near replication forks, perhaps there to bind and organize newly replicated DNA. Less

Report

(5 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (27 results)

All Other

All Publications (27 results)

  • [Publications] Imai, Y.: "Subcellular Iocalization of Dna-initiation proteins of Bacillus subtilis : evidence that chromosome replication begins at either edge of the nucleoids"Mol Microbiol. 36. 1037-1048 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ishigo-Oka, D.: "DnaD protein of Bacillus subtilis interacts with DnaA, the initiator protein of replication"J Bacteriol. 183. 2148-2150 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ogura, Y.: "Autoregulation of the dnaA-dnaN operon and effects of DnaA protein levels on replication initiation in Bacillus subtilis"J Bacteriol. 183. 3833-3841 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Soppa, J.: "Discovery of two novel families of proteins that are proposed to interact with prokaryotic SMC proteins, and characterization of the Bacillus subtilis family members ScpA and ScpB"Mol Microbiol. 45. 59-71 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kadoya, R.: "Two separate DNA sequences within oriC participate in accurate chromosome segregation in Bacillus subtilis"Mol Microbiol. 45. 73-87 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Lindow, J.C.: "Subcellular localization of the Bacillus subtilis structural maintenance of chromosomes (SMC) protein"Mol Microbiol. 46. 997-1009 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Morimoto, T.: "Six GTP-binding proteins of the Era/Obg family are essential for cell growth in Bacillus subtilis"Microbiology. 148. 3539-3552 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Lee, P.S.: "Effects of the Chromosome Partitioning Protein Spo0J (ParB) on oriC Positioning and Replication Initiation in Bacillus subtilis"J Bacteriol. 185. 1326-1337 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Imai, Y., Ogasawara, N., Ishigo-Oka, D., Kadoya, R., Daito, T., and Moriya, S.: "Subcellular localization of Dna-initiation proteins of Bacillus subtilis : evidence that chromosome replication begins at either edge of the nucleoids"Mol Microbiol. 36. 1037-1048 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ishigo-Oka, D., Ogasawara, N., and Moriya, S.: "DnaD protein of Bacillus subtilis interacts with DnaA, the initiator protein of replication"J Bacteriol. 183. 2148-2150 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ogura, Y., Imai, Y., Ogasawara, N., and Moriya, S.: "Autoregulation of the dnaA-dnaN operon and effects of DnaA protein levels on replication initiation in Bacillus subtilis"J Bacteriol. 183. 3833-3841 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Soppa, J., Kobayashi, K., Noirot-Gros, M.F., Oesterhelt, D., Ehrlich, S.D., Dervyn, E., Ogasawara, N., and Moriya, S.: "Discovery of two novel families of proteins that are proposed to interact with prokaryotic SMC proteins, and characterization of the Bacillus subtilis family members ScpA and ScpB"Mol Microbiol. 45. 59-71 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kadoya, R., Hassan, A.K., Kasahara, Y., Ogasawara, N., and Moriya, S.: "Two separate DNA sequences within oriC participate in accurate chromosome segregation in Bacillus subtilis"Mol Microbiol. 45. 73-87 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Lindow, J.C., Kuwano, M., Moriya, S., and Grossman, A.D.: "Subcellular localization of the Bacillus subtilis structural maintenance of chromosomes (SMC) protein"Moi Microbiol. 46. 997-1009 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Morimoto, T., Loh, P.C., Hirai, T., Asai, K., Kobayashi, K., Moriya, S., and Ogasawara, N.: "Six GTP-binding proteins of the Era/Obg family are essential for cell growth in Bacillus subtilis"Microbiology. 148. 3539-3552 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Lee, P.S., Lin, D.C., Moriya, S., and Grossman, A.D.: "Effects of the chromosome partitioning protein SpoOJ (ParB) on oriC positioning and replication initiation in Bacillus subtilis"J Bacteriol. 185. 1326-1337 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Soppa, J.: "Discovery of two novel families of proteins that are proposed to interact with prokaryotic SMC proteins, and characterization of the Bacillus subtilis family members ScpA and ScpB"Mol Microbiol. 45・1. 59-71 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Kadoya, R.: "Two separate DNA sequences within oriC participate in accurate chromosome segregation in Bacillus subtilis"Mol Microbiol. 45・1. 73-87 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Lee, P.S.: "Effects of the Chromosome Partitioning Protein Spo0J (ParB) on oriC Positioning and Replication Initiation in Bacillus subtilis"J Bacteriol. 185・4. 1326-1337 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Lindow, J.C.: "Subcellular localization of the Bacillus subtilis structural maintenance of chromosomes (SMC) protein"Mol Microbiol. 46・4. 997-1009 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Morimoto, T.: "Six GTP-binding proteins of the Era/Obg family are essential for cell growth in Bacillus subtilis"Microbiology. 148・11. 3539-3552 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Ogura, Y.: "Autoregulation of the dnaA-dnaN operon and effects of DnaA protein levels on replication initiation in Bacillus subtilis"J. Bacteriol. 183・6. 3833-3841 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Lemon, K.P.: "Bacillus subtilis and Its Closest Relatives : from Genes to Cells"ASM Press. 629 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Ishigo-oka,D.: "DnaD protein of Bacillus subtilis interacts with DnaA,the initiator protein of replication."J.Bacteriol.. 183・6. 2148-2150 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Imai,Y.: "Subcellular localization of Dna-initiation proteins of Bacillus subtilis:evidence that chromosome replication begins at either edge of nucleoids."Mol.Microbiol.. 36・5. 1037-1048 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 仁木宏典他: "細菌における分子細胞生物学の新展開"蛋白質 核酸 酵素. 45・2. 153-163 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Imai,Y.et al.: "Subcellulor localization of DNA-initiation proteins of Bacillus subtilis:Evidence that chromosome replication begins・・・"Molecular Microbiology. (印刷中). (2000)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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