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1990 Fiscal Year Final Research Report Summary

Structure, Function, and Evolution of Eukaryotic and Prokaryotic Respiratory Electron Transfer Systems

Research Project

Project/Area Number 01470148
Research Category

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

Allocation TypeSingle-year Grants
Research Field 物質生物化学
Research InstitutionOsaka University

Principal Investigator

MATSUBARA Hiroshi  Fac. Sci., Dept., Biol., Professor, 理学部, 教授 (00028242)

Co-Investigator(Kenkyū-buntansha) SAEKI Kazuhiko  Fac, Sci., Dept. Biol., Professor, 理学部, 助手 (40201511)
WAKABAYASHI Sadao  Fac, Sci., Dept. Biol., Professor, 理学部, 助手 (80148436)
FUKUYAMA Keiichi  Fac. Sci., Dept. Biol., Professor, 理学部, 講師 (80032283)
Project Period (FY) 1989 – 1990
KeywordsRespiratory Electron Transfer Systems / Prokaryote And Eukaryote / Structure, Function And Evolution / Cytochrome bc_1 Complex / Crystallization Of bc_1 / Site Directed Mutagnesis / Euglena Cytochrome c_1 / 08Cyanobacterial Cytochrome b_6f
Research Abstract

1) Bovine heart mitochondrial complex III (bc_1 was prepared by an improved method. This preparation showed a ping-pong mechanism analyzed by a steady-state reaction kinetics, when it transfers electrons from QH_2 to cytochrome c.
2) This bc_1 complex was reproducibly crystallized in a large scale to reddish parallelpipe forms by treating the preparation with polyethyleneglycol containing sucrose within 1-2 weeks at room temperature.
3) The crystal diffracted X-ray at less than 8 A resolution, but it was rather fragile for mechanical shocks and unstable by exposing it to air. Therefore, some improvements in crystallization and manipulations to X-ray analysis.
4) Euglena cytochrome c was found to be stable if it was prepared in the reduced form, promisingit to be a good preparation for crystallization.
5) The base sequence of cDNA encoding Euglena cytochrome c_1 was completed. The comparison of various c_1 sequences revealed that His and Met were the ligands to the heme iron atom. Heme C was bound to only one cysteine through a thioether bond and Phe was in the position of Cys usually binding the heme together with the other.
6) The site directed mutations of putative heme ligands, His and Met, in yeast cytochrome c_1 showed that these two have important roles for the iron chelation and assembly of the bc_1 complex.
7) One of the two acidic regions supposed to interact with cytochrome c at around position 70 in yeast cytochrome c_1 was found to be not essential for the interaction by gene deletion experiments.
8) Sequence analyses of 13kDa(two different polypeptides), 2okDa, and 20kDa Sub-units revealed that there are several regions forming iron-sulfur clusters in mitochondrial Complex I.
9) A cyanobacterial b_6f complex was found to be able to transfer electrons to cytochrome aa_3 through cytochrome c_<553>.

  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] Y.Minami: "The Isolation and Characterization of Cytochrome b_6f Complex from the Cyanobacterium Spirulina sp." Plant Cell Physiol.30. 91-98 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Mukai: "An Atypical HemeーBinding Structure of Cytochrome c_1 of Euglena gracilis Mitochondrial Complex III" Eur.J.Biochem.178. 649-656 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Nakai: "Protein Sorting between the Outer and Inner Mitochondrial Membranes:Submitochondrial localization of cytochrome c__ー_1 whose Presequence is replaced by the Nーterminal Region of 70kDa Outer Membrane Protein" J.Biochem.106. 181-187 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 向井 邦晃: "Euglena ミトコンドリアの呼吸鎖電子伝達系ーシトクロムbc_1複合体の比較生化学" 日本農芸化学会誌. 63. 1509-1512 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Mukai: "Molecular Cloning and Nucleotide Sequence of cDNA Encoding Euglena gracilis Cytochrome c_1" J.Biochem.106. 479-482 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Matsubara: "Cytochrome c_1 Heme Ligands and Acidic Regions Interacting with Cytochrome c" Proc.of Int'l Symp.on Bioenergetics of Proton Pumps:Biochemistry,Cell Biology,and Molecular Pathology. 110-113 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Nakai: "Replacement of Putative Axial Liands of Heme Iron in Yeast Cytochrome c_1 by Site Directed Mutagenesis" J.Biochem.108. 798-803 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] R.Masui: "Amino Acid Sequences of Two 13 k and 30 k Polypeptides from Bovine Heart Mitochondrial Complex I" The Protein Society symp.(Abstracts). IV. M-125 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] R.Masui: "The Amino Acid Sequences of Two 13 kDa Polypeptides and Partial Amino Acid Sequence of 30kDa Polypeptide of Complex I from Bovine Heart Mitochondria" J.Biochem.109. (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Kubota: "SteadyーState Kinetics of Beef Heart Cytochrome bc__ー_1 Complex" Proc.of Int'l.Symp.on Bioenergetics of Proton Pumps:Biochemistry,Cell Biology,and Molecular Pathology. 127 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y. Minami,, K. Wada, and H. Matsubara: "The Isolation and Characterization of a Cytochrome b_6f Complex from the Cyanobacterium Spirulina sp." Plant Cell Physiol. 30(1). 91-98 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Mukai, M. Yoshida, H. Toyosaki, Y. Yao, S. Wakabayashi and H. Matsubara: "An Atypical Heme-binding Structure of Cytochrome c_1 of Euglena gracilis Mitochondrial Complex III" Eur. J. Biochem.178(3). 649-656 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Nakai, M. Harabayashi, T. Hase, and H. Matsubara: "Protein Sorting between the Outer and Inner Mitochondrial Membranes : Submitochondrial Location of Cytochrome c_1 Whose Presequence is Replaced by the N-terminal Region of 70kDa Outer Membrane Protein" J. Biochem.106(1). 181-187 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Mukai and H. Matsubara: "Respiratory electron Transfer System of Euglena Mitochondria (in Japanese)" Japanese Agr. Chem.63(9). 1509-1512 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Mukai, S. Wakabayashi, and H. Matsubara: "Molecular Cloning and Nucleotide Sequence of cDNA Encoding Euglena gracilis Cytochrome c_1" J. Biochem.106(3). 479-482 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Matsubara: "Cytochrome c_1 Heme Ligands and Acidic Regions Interacting with Cytochrome c" Proc. of Int'l Symp. on Bioenegetics of Proton Pumps : Biochemistry, Cell Biology, and Molecular Pathology (eds., T. Fukui et al.). 110-113 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Kubota, S. Yoshikawa, and H. Matsubara: "Steady-State Kinetics of Beef Heart Cytochrome bc_1 Complex" Pro. of Int'l Symp. on Bioenegetics of Proton Pumps : Biochemistry, Cell Biology, and Molecular Pathology (eds., T. Fukui et al.). 127 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Nakai, H. Ishiwatari, A. Asada, M. Bogaki, K. Kawai, Y. Tanaka, and H. Matsubara: "Replacement of Putative Axial Lignads of Heme Iron in Yeast Cytochrome b_1 by Site Directed Mutagenesis" J. Biochem. 108(5). 798-803 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R. Masui, S. Wakabayashi, H. Matsubara, and Y. Hatefi: "Amino Acid Sequences of Two 13kDa Polypeptides and Partial Amino Acid Sequence of 30kDa Polypeptide of Complex I from Bovine Mitochondria" The Protein Soc. Symp. IV. 125 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R. Masui, S. Wakabayashi, H. Matsubara, and Y. Hatefi: "The Amino Acid Sequences of Two 13kDa Polypeptides and Partial Amino Acid Sequence of 30kDa Polypeptide of Complex I from Bovine Heart Mitochondria" J. Biochem.109. 1991

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

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Published: 1993-08-12  

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