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Molecular basis of cellular functions in Dictyostelium

Research Project

Project/Area Number 10044192
Research Category

Grant-in-Aid for Scientific Research (B).

Allocation TypeSingle-year Grants
Section一般
Research Field Developmental biology
Research InstitutionTohoku University

Principal Investigator

MAEDA Yasuo  Tohoku University, Graduate School of Science, Professor, 大学院・理学研究科, 教授 (50025417)

Co-Investigator(Kenkyū-buntansha) SUTOH Kazuo  University of Tokyo, Graduate School of Arts and Sciences, Professor, 大学院・総合文化研究科, 教授 (20111453)
FIRTEL Richa  カリフォルニア大学(サン, ディエゴ校)・分子遺伝センター, 教授
WILLIAMS Jef  ロンドン大学, MRC研究所, 教授
Project Period (FY) 1998 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥7,500,000 (Direct Cost: ¥7,500,000)
Fiscal Year 2000: ¥5,100,000 (Direct Cost: ¥5,100,000)
Fiscal Year 1999: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1998: ¥1,300,000 (Direct Cost: ¥1,300,000)
Keywordscell cycle / PS point / differentiation / pattern formation / starvation / Turing model / Chemotaxis / Dictyostelium / 細胞質分裂 / ミトコンドリア / 飢餓応答
Research Abstract

(1) Using the good method for cell synchrony, three genes (dia1, dia2, dia3) were isolated and identified as ones specifically expressed during the transition of Dictyostelium cells from growth to differentiation. Analyses of their functions have revealed that in response to starvation the expressions of a novel gene, dia2, and a mitochondrial gene cluster (dia3) including rps4 are required for the initiation of cell differentiation from the growth/differentiation checkpoint (PS point) in the cell cycle, but that the expression of a novel gene (dia 1) rather inhibits temporally the progression of differentiation from the PS point. In addition, a novel gene, amiB, was also found to be required for the transition of cells from growth to differentiation.
(2) The signals for starvation response in Dictyostelium cells have been shown to be transduced through a temporally elevated cytoplasmic Ca2+-concentration ([Ca2+]i). In this connection, it was suggested that Dd-GRP94 (Dictyostelium gluco … More se-regulated protein 94) might be cruial in late differentiation as well as in starvation response. During the course of studies, some phosphoproteins resaonsible for starvation response were also found
(3) The mitochondrion was Immunoelectron-microscopically found to be participated in the formation of a cell-type-specific organelle (PSV ; presnore-specific vacuole) as the structural basis, coupling with the Golgi complex.
(4) Rappid patterning has been observed in confined 2-D cultures of D.discoideum Ax-2 cells as an outer dark zone and a inner light zone : the outer zone is basically formed by the O2 threshold for oxidative phosphorylation, while the inner cells mainly perform cyanide-resistant respiration. When cells around the early mound stage (just before prestalk and prespore differentiation) were cultured in 2-D cell masses, pstA cells, pstB cells and prespore cells arose in a position-dependent manner in the outer layer. In the inner zone, cell motility seemed to be markedly impared and neither prestalk nor prespore differentiation occurred. In sddition, once-differentiated prespore cells were found to dedifferentiate ranidly in the inr zone.
(5) A new type of rappid paterning as observed in a 2-D confined cell mass of D.discoideum is formed due to a reaction-diffusion Turing instability. This may be the first biochemical structure in a developmental system with a controllable boundary condition. Less

Report

(4 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • 1998 Annual Research Report
  • Research Products

    (37 results)

All Other

All Publications (37 results)

  • [Publications] Hirose S. et al.: "Suppression of the growth /differentiation transition in Dictyostelium development by transient expression of dia1"Development. 127. 3263-3270 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Sawai,S. et al.: "Spontaneous symmetry breaking Turing pattern formation in a confined Dictyostelium cell mass"Phys.Rev.Lett.. 85. 2212-2215 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kon,T. et al: "amiB, a novel gene required for the growth differentiation transition in Dictyostelium"Genes Cells. 5. 43-55 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Inazu,Y. et al.: "Transient expression of a mitochondrial gene cluster including rps4 is essential for phase-shift of Dictyostelium cells"Develop Genetics. 25. 339-352 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 前田靖男: "細胞周期のチェックポイントと粘菌細胞の分化バターン形成"細胞工学. 18. 1543-1555 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Sasaki, et al.: "Deletion of the myopathy loop of Dictyostelium myosin II and its impact on motor functions"J.Biol.Chem.. 274. 37840-37844 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 前田靖男: "モデル生物:細胞性粘菌"(株)アイピーシー. 386 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Hirose, S., Inazu, Y., Chae, S.-C.and Maeda, Y.: "Suppression of the growth/differentiation transition in Dictyostelium development by transient expression of a novel gene, dia1."Development. 127. 3263-3270 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Sawai, S., Maeda, Y.and Sawada, Y.: "Spontaneous symmetry breaking Turing pattern formation in a confined Dictyostelium cell mass."Phys.Rev.Lett.. 85. 2212-2215 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kon, T., Adachi, H.and Sutoh, K.: "amiB, a novel gene required for the growth/differentiation transition in Dictyostelium"Genes Cells. 5. 43-55 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Inazu, Y., Chae, S.-C.and Maeda, Y.: "Transient expression of a mitochondrial gene cluster including rps4 is essential for the phase-shift of Dictyostelium cells from growth to differentiation."Develop.Genetics. 25. 339-352 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Maeda, Y.: "A checkpoint of the cell cycle and its relation to differentiation and pattern formation in Dictyostelium development."Cell Technol.. 18. 1543-1555 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Sasaki, N., Asukagawa, H., Yasuda, R., Hiratsuka, N.and Sutoh, K.: "Delation of the myopathy loop of Dictyostelium myosin II and its impact on motor functions."J.Biol.Chem.. 274. 37840-37844 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Maeda, Y.: "A Model Organism : Dictyostelium"IPC. (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Hirose,S. et al.: "Suppression of the growth differentiation transition in Dictyostelium development by transient expression of dial."Development. 127. 3263-3270 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Morita,T. et al.: "Involvement of the glucose-regulated protein 94 (Dd・GRP94) in starvation response of Dictyostelium discoidoum cells"Biochem.Biophys.Res.Commun.. 274. 323-331 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Sawai,S. et al.: "Spontaneous symmetry breaking Turing pattern formation in a confined Dictyostelium cell mass"Phys.Rev.Lett.. 85. 2212-2215 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Hirano,T. et al.: "Rappid patterning in 2D-cultures of Dictyosteliun cells and its relation to zonal differentiation"Develop.Growth Differ.. 42. 551-560 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Kon,T. et al.: "amiB,a novel gene required for the growth differentiation transition in Dictyostelium"Genes of Cells. 5. 43-55 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Rafols et al.: "Cell type regulation in Dictyostelium slugs : prestalk proportion spans over a range of values"Differentiation. (in press). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] 前田靖男(編): "モデル生物:細胞性粘菌"アイピーシー(IPC). 386 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Inazu Y.: "Transient expression of a mitochondrial gene cluster including rps4 is essential for the phase-shift of Dictyostelium cells from growth to differentiation"Developmental Genetics. 25. 339-352 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 前田靖男: "細胞周期のチェックポイントと粘菌細胞の分化・パターン形成"細胞工学. 18. 1543-1555 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Yazu M.: "Novel Dictyostelium unconventional myosin MyoK is a class I myosin with the longest insert and the shortest tail"Biochem, Biophys, Research Communications. 255. 711-716 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Sasaki N.: "Deletion of the myopathy loop of Dictyostolium myosin II and its impact on motor functions"Journal of Biological Chemistry. 274. 37840-37844 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kon T.: "amiB, a novel gene required for the growth/differentiation in Dictyostelium"Genes of Cells. 5. 43-55 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 前田靖男: "モデル生物:細胞性粘菌"(株)アイピーシー(印刷中). 400 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Chae,S.-C.: "Underexpression of a novel gene,dia2,impairs the transition of Dictyostelium cells from growth to differentiation." Biochemical and Biophysical Research Communications. 252. 278-283 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Itoh,M.: "Overexpression of CAF1 encoding a novel Ca^<2+> -binding protein stimulates the transition of Dictyostelium cells from growth to differentiation." Develop.Growth & Differ.40. 677-683 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Chae,S.-C.: "Preferential expression of the cDNA encoding the proteasome subunit during the growth/differentiation transition of Dictyostelium cells." Biochem.Biophys.Res.Commun.245. 231-234 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Chae,S.-C: "Cloning and sequence analysis of the cDNA encoding the elongation factor-1 β of Dictyostelium discoideum." Biochim.Biophys.Acta. 1383. 1-3 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Sawada,Y.: "Rapid patterning of Dictyostelium discoideum cells under confined geometry and its relation to differentiation." Develop.Growth Differ.40. 113-120 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Araki,T.: "Mutual relation between the cell-cycle progression and prespore differentiation in Dictyostelium development." Zool.Sci.15. 77-84 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Matsuyama,S.-I.: "A mitochondrion as the structural basis of the formation of a cell-type-specific organelle in Dictyostelium development." Protoplasma. 201. 172-179 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Suzuki,Y.: "Swing of leve-arm of myosin motor at the isomerization and Pi-release steps." Nature. 396. 380-383 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Nagasaki,A.: "A novel Dictyostelium discoideum gene required for cAMP-dependent cell aggregation." Biochem.Biophys.Res.Commun.244. 505-513 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Saito,J.: "Dictyostelium TRF A Homologous to Yeast Ssn6 is Required for Nomal Growthand Early development." J.Biol.Chem.273. 24654-24659 (1998)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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