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Analysis of structure and function of saliva protein receptor domains for periodontopathogen

Research Project

Project/Area Number 08457568
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 矯正・小児・社会系歯学
Research InstitutionOsaka University

Principal Investigator

SHIZUKUISHI Satoshi  Osaka University, Faculty of Dentistry, Professor, 歯学部, 教授 (00028789)

Co-Investigator(Kenkyū-buntansha) KUBONIWA Masae  Osaka University, Faculty of Dentistry, Research associate, 歯学部・附属病院, 医員
KATAOKA Kousuke  Osaka University, Faculty of Dentistry, Assistant Professor, 歯学部, 助手 (50283792)
AMANO Atsuo  Osaka University, Faculty of Dentistry, Assistant Professor, 歯学部・附属病院, 講師 (50193024)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥7,400,000 (Direct Cost: ¥7,400,000)
Fiscal Year 1997: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1996: ¥6,400,000 (Direct Cost: ¥6,400,000)
Keywordsperiodontopathogen / Porphyromonas gingivalis / fimbriae / prolone-rich protein / statherin / proline-rich glycoprotein / salivary protein / binding / P.gingivalis / proline-rich protein / エピトープマッピング
Research Abstract

The objects of this study are to determine the amino acid residues of saliva protein receptors that interact specifically with Porphyromonas gingivalis, and to analyze the function of the receptors. After proline-rich protein (PRP) was proteolysed, the interaction of each PRP fragment with recombinant fimbrillin was examined by ELISA and binding inhibition experiment using ^<125>I-labeled fimbrillin and PRP-coated hydroxyapatite beads (HAP). Analogous peptides corresponding to the fragments which showed the binding activity were synthesized and used to determine the binding domain. Epitope mapping experiments showed that peptide Pro-Gln-Gly-Pro-Pro-Gln was minimal active segment for binding to P.gingivalis fimbriae. Synthetic peptides representing statherin analogs were used to localize the binding domains of statherin. Successive peptides were synthesized by deleting individual amino acid residues from the C and N termini of the peptide that showed the binding activity to fimbrillin. The binding inhibition experiments using the peptides indicated that Leu-29-Tyr-30 and Tyr-41-Thr-42-Phe-43 are important binding regions that mediate the binding of statherin to P.gingivalis. It was shown that fimbriae also bound to proline-rich glycoprotein (PRG) purified from parotid saliva. The peptide analogous to the binding region of PRP significantly inhibited the binding of fimbriae to PRG-coated HAP,while the peptide analogous to the binding region of statherin showed no effect on the fimbrial binding to PRG.The similar result is obtained by Overlay assay. These results suggest that fimbriae bind to saliva through the two distinct binding domains of receptory salivary components, PRG/PRP and statherin.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] Atsuo Amano: "Binding sites of salivary statherin to Porphyromonas gingivalis recombinant fimbrillin" Infection and Immunity. 64・10. 4249-4254 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kousuke Kataoka: "Active sites of salivary proline-rich protein for binding to Porphyromonas gingivalis fimbrias" Infection and Immunity. 65・8. 3159-3164 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Atsuo Amano: "Binding of Porphyromonas gingivalis fimbriae to proline-rich glycoproteins in parotid saliva via a common domain shared by major salivary components" Infection and Immunity. (in prss).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Atsuo Amano: "Binding sites of salivary statherin to Porphyromonas gingivalis recombinant fimbrillin" Infection and Immunity. 64・10. 4249-4254 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Kataoka: "Active sites of salivary proline-rich protein for binding to Porphyromonas gingivalis fimbriae" Infection and Immunity. 65・8. 3159-3164 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Atsuo Amano: "Binding of Porphyromonas gingivalis fimbriae to proline-rich glycoproteins in parotid saliva via a common domain shared by major salivary components" (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kousuke Kataoka: "Active sites of salivary proline-rich protein for binding to Porphyromonas gingivalis fimbriae" Infection and Immunity. 65・8. 3159-3164 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Atsuo Amano: "Binding of Porphyromonas gingivalis fimbriae to proline-rich glycoproteins in parotid saliva via a common domain shared by major salivary components" Infection and Immunity. (in press).

    • Related Report
      1997 Annual Research Report
  • [Publications] A.Amano,K.Kataoka,P.A.Raj,R.J.Genco,S.Shizukuishi: "Binding sites of salivary statherin to Prorphyromonas gingivalis recombinant fimbrillin" Infection and Immunity. 64(10). 4249-4254 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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