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Selective protein cleavage reagents carrying metal chelates moiety : Synthesis and application to the structural analysis of trypsin.

Research Project

Project/Area Number 09672152
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Chemical pharmacy
Research InstitutionHealth Sciences University of Hokkaido

Principal Investigator

TANIZAWA Kazutaka  Health Sciences University of Hokkaido, Faculty of Pharm.Sci., professor, 薬学部, 教授 (90001049)

Co-Investigator(Kenkyū-buntansha) TOYOTA Eiko  Health Sciences University of Hokkaido, Faculty of Pharm.Sci., lecturer, 薬学部, 講師 (00103200)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1998: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1997: ¥1,900,000 (Direct Cost: ¥1,900,000)
Keywordstrypsin / affinity labeling / trypsin-like enzyme / chemical modification / metal chelate / peptide bond cleavage / トリプシン / トリプシン類縁酵素 / ペプチド切断試薬
Research Abstract

In our previous work, it was found that benzamidine derivatives behave as strong binding affinity towards trypsin and trypsin-like enzymes. As an extension of the wurk, we designed compounds which contained metal chelate moiety as well as the amidine group with a view to obtaining selective modification reagents for trypsin and trypsin-like enzymes. The reagents were expected to mediate cleavage of the enzyme backbone at the region where the metal attained close contact when they were bound in the binding site of the enzyme. the three-dimensional structure of the enzyme-reagent complex. eaction peptide bond cleavage reagents for trypsin.
In 1997 we synthesized 38 chelates as candidate for trypsin-specific cleavage reagent, and their binding affinity toward trypsin and trypsin-like enzymes was determinecL They were analyzed to exhibit strong binding affinity toNard these enzymes with Ki values range of 10^5 - 1O^6 Mi. During the period of the fiscal year of 1998 the medification reaction mediated by these chelates were investigated. Cleavage was observed when the enzyme was incubated with the reagent in the presence of hydrogenperoxide and ascorbate. A peptide fragment due to bond cleavage was analyzed by SDS- PAGE.It was suggested that the cleavage occurred at the region within Gly195 -A1a2O4. It was concluded that the region is close to the active site of the enzyme in its three-dimensional structure.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] Kunihiko Itoh: "Methyltrypsin-catalyzed peptide coupling : Comparison of alkyl ester and guanidino-phenyl ester derivatives as acyl donor component" Bioorganic Chemistry. 25. 307-319 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Haruo Sekizaki: "Enzymatic peptide synthesis withp-guanidinophenyl and p-(guanidinomethyl)phenyl esters as acyl donors" Chem.Pharm.Bull.46(5). 846-849 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Eiko Toyota: "Application of Schiff base copper(II)and iron(III)chelatyes to site-specific cleavage of a trypsin" Chem.Pharm.Bull.47(1). 116-119 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Haruo Sekizaki: "The structural requirements for an inverse subtrates for enzymatic peptide synthesis" Chem.Pharm.Bull.47(1). 104-110 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Haruo Sekizaki: "Application of various inverse substrates to thrombin-catalyzed peptide synthesis," Chem.Pharm.Bull.,. 47(3). 444-447 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kunihiko Itoh: "Methyltrypsin-catalyzed peptide coupling : Comparison of alkyl ester and guanidino-phenyl ester derivatives as acyl donor component." Bioorganic Chemistry. 25. 307-319 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Haruo Sekizaki: "Enzymatic peptide synthesis with p-guanidinophenyl and p-(guanidinomethyl)phenyl esters as acyl donors." Chem.Pharm.Bull.46(5). 846-849 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Eiko Toyota: "Application of Schiff base copper(II)and iron(III)chelatyes to site-specific cleavage of a trypsin." Chem.Pharm.Bull.47(1). 116-119 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Haruo Sekizaki: "The structural requirements for an inverse subtrates for enzymatic peptide synthesis." Chem.Pharm.Bull.47(1). 104-110 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Haruo Sekizaki: "Application of various inverse substrates to thrombin-catalyzed peptidesynthesis." Chem.Pharm.Bull.47(3). 444-449 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kunihiko Itoh: "Methyltrypsin-catalyzed peptide coupling Comparison of alkyl ester and guanidinophenyl ester derivatives as acyl donor component" Bioorganic Chemistry. 25. 307-319 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Eiko Toyata: "Application of Schiff base copper(II)and iron(III)chelatyes to site -specific cleavage of a trypsin" Chem Pharm Bull.47(1). 116-119 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Haruo Sekizaki: "Enzymatic peptide synthesis withp-guanidinophenyl and p-(guanidinomethyl esters as acyl donors" Chem Pharm Bull.46(5). 846-849 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Haruo Sekizaki: "The structural requirements for an inverse subtrates for enzymatic peptide synthesis" Chem Pharm Bull.47(1). 104-110 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Kazutaka Tanizawa: "Site-specific cleavage of trypsin by metal chelates carrying amidiniumgroup" 17th Internatl Symp on the Separation of Protein:abst.of paper. p36 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Kazutaka Tanizawa: "Methyltrypsin-catalyzed peptide coupling Comparison of alkyl ester and guanidinophenyl ester derivatives as acyl donor component" Bioorganic Chemistry. 26. 000-000 (1998)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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