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1996 Fiscal Year Final Research Report Summary

MECHANISM AND STRUCTURE OF PHOTOSYNTHETIC REACTION AND APPRATUS FOR APPLICATION OF ITS MECHANISM TO ENERGY PRODUCING BIOMEMBRANE

Research Project

Project/Area Number 07455437
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 生物・生体工学
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

NOZAWA Tsunenori  TOHOKU UNIVERSITY,FACULTY OF ENGINEERING,PROFESSOR, 工学部, 教授 (10006322)

Co-Investigator(Kenkyū-buntansha) SHIKAMA Yuko  TOHOKU UNIVERSITY,FACULTY OF ENGINEERING,RESEARCH ASSOCIATE, 工学部, 助手 (80250710)
KOBAYASHI Masayuki  TOHOKU UNIVERSITY,FACULTY OF ENGINEERING,RESEARCH ASSOCIATE, 工学部, 助手 (70271864)
WANG Zheng  TOHOKU UNIVERSITY,FACULTY OF ENGINEERING,ASSOCIATE PROFESSOR, 工学部, 助教授 (10213612)
Project Period (FY) 1995 – 1996
KeywordsPHOTOSYNTHETIC MEMBRANE / REACTION CENTER COMPLEX / MEMBRANE ANTENNA / CHLOROSOME ANTENNA / SOLID STATE NMR / X-RAY DIFFRACTION SPECTROSCOPY / ATP SYNTHESIS / P-31 NMR
Research Abstract

Bio-membranes play key roles in many vital processes in life, especially energy production, and information transfer. In this project we have investigate the energy conversion processes in photosynthesis with an intention to apply its mechanism for construction of semi-synthetic artificial solar energy conversion. Photosynthetic living convert light energy to chemical energy by (1) capturing light energy and conversing it to excitation energy in antenna complex, (2) changing the excitation energy to electro-chemical energy in reaction center and electron transfer complexes, and (3) making the chemical energy ATP (adenosine tri-phosphate) in ATP ase. We have clarified the light capturing mechanism of antenna both on chlorosome and membrane antenna. The primary structures of the reaction center for a novel thermo-philic photosynthetic bacteria have been determined for the first time. The fine structures which modulate the electron transfer ability of reaction center have been clarified by electric and spectroscopic methods. Organization of pigments have been elucidated by magnetic circular dichroism methods for the antenna and photosynthetic membranes. Photosynthetic membrane vehicles (chromatophore) which contain antenna, reaction exenter, electron transfer protein and ATP ase have been studied with respect to its size distribution and photo-phosphorylation activity.

  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] Zheng-Yu Wang et al.,: "Size distribution and photophosphorylation of chromatophores from Rhodospirillum rubrum" Photosynthesis Research. (印刷中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Insan Fathir et al.,: "The genes coding for the L,M and cytochrome subunits of the photosynthetic reaction center from the thermophilic purple sulfur bacterium Chromatium tepidum" Photosynthesis Research. 51. 71-82 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Anabella Ivancich et al.,: "Hydrogen-bond interactions of the primary donor of the photosynthetic purple sulfur bacterium Chromatium tepidum" Biochemistry. 35. 10529-10538 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Mamoru Mimuro et al.,: "Excitation energy transfer in the green photosynthetic bacterium Chloroflexus aurantiacus:A specifuc effect of 1-hexanol on the optical properties of baseplate and energy transfer processes" Photosynthesis Research. 48. 263-270 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] John T.M.Kennis et al.,: "Energy transfer and exciton coupling in isolated B800-850 complexes of the photosynthetic purple sulfur bacterium Chromatium tepidum.The effect of structural symmetry on bacteriochlorophyll excited states" J.Phys.Chem.100. 2438-2442 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Masayuki Kobayashi et al.,: "Molecular structures and optical properties of aggregated forms of chlorophylls analyzed by means of magnetic circular dichroism" Spectrochimica Acta Part A. 51. 585-598 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Zheng-Yu Wang et al.,: "Morphology and spectroscopy of chlorosomes from Chlorobium tepidum by alcohol treatmens" Biochim.Biophys.Acta. 1232. 187-196 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 野澤庸則(分担執筆): "新タンパク質応用工学(第5章第2節,第11章第11節)" フジ・テクノシステム(監修 旗野昌弘), 19 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Zheng-Yu Wang et al.: ""Size distributi on and photophosphorylation of chromatophores from Rhodospirillum rubrum"" Photosynthesis Research. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Insan Fathir et al.: ""The genes coding for the L,M and cytochrome subunits of the photosynthetic reaction center from the thermophilic purple sulfur bacterium Chromatium tepidum"" Photosynthesis Research. 51. 71-82 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Anabella Ivancich et al.: ""Hydrogen-bond interactions of the primary donor of the photosynthetic purple sulfur bacterium Chromatium tepidum"" Biochemistry. 35. 10529-10538 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Mamoru Mimuro et al.: ""Excitation energy transfer in the green photosynthetic bacterium Chloroflexus aurantiacus : A specific effect of 1-hexanol on the optical properties of baseplate and energy transfer processes"" Photosynthesis Research. 48. 263-270 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] John T.M.Kennis et al.: ""Energy transfer and exciton coupling in isolated B800-850 complexes of the photosynthetic purple sulfur bacterium Chromatium tepidum. The effect of structural symmetry on bacteriochlorophyll excited states"" J.Phys.Chem.100. 2438-2442 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Masayuki Kobayashi et al.: ""Molecular structures and optical properties of aggregated forms of chlorophylls analyzed by means of magnetic circular dichroism"" Spectrochimica Acta Part A. 51. 585-598 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Zheng-Yu Wang et al.: ""Morphology and spectroscopy of chlorosomes from Chlorobium tepidum by alcohol treatments"" Biochim.Biophys.Acta. 1232. 187-196 (1995)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-09  

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