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Structure and expression of cysteine protease genes from parastic helminth

Research Project

Project/Area Number 05670241
Research Category

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

Allocation TypeSingle-year Grants
Research Field 寄生虫学(含医用動物学)
Research InstitutionJuntendo University

Principal Investigator

YAMASAKI Hiroshi  Juntendo University Dept.Parasitology Lecturer, 医学部, 講師 (00138207)

Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1994: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1993: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsParasitic helminth / Fasciola sp. / cysteine protease / cathepsin L gene / gene structure / Fasciola sp. / cysteine protease / cDNA cloning / amino acid sequence
Research Abstract

The Fasciola cDNA library was constructed in lambdagt11 and the screening of 4 x 10^4 independent plaques resulted in two positive clones. These clones (B22-2 and B7-2), which contained 1.1 kb cDNA inserts, were sequenced. Two cDNA clones encoded the Fasciola cysteine protease precursors. The deduced precursors contained 325 - 326 amino acid residues consisting of a signal sequence (pre-region, 15 residues), pro-region (90 residues), and mature protease (220 - 221 residues, Mr.24kDa). Cys^<27>, His^<164>, and Asn^<184> form the catalytic triad in the active side of the mature enzyme, and their adjacent regions were highly conserved. The parasite enzymes showed 50% amino acid sequence homologies, compared with mammalian lysosomal cathepsin L.Interestingly, asparadgine-linked glycosylation sites wich are thought to be targeting signals for cathepsins into lysosomes is absent in any region of the Fasciola cysteine protease (cathepsin L) molecule. The fact that two Fasciola Cathepsin L hav … More e no glycosylation motif is strongly suggestive of the occurrence of a different mechanism by which the Fasciola cathepsin L are transported into secretory granules of intestinal epithelial cells. Thus, to elucidate the reguratory mechanism of Fasciola cathepsin L gene expression and targeting to secretory granules. We characterized the gene structure of the Fasciola cathepsin L.
Two structural genes encoding Fasciola cathepsin L were amplified by polymerase chain reaction (PCR) using oligonucleotide primers synthesized on the basis of the 5'- and 3' of two cDNA open reading flames and Fasciola genomic DNA.The PCR-amplified products (1.9 and 1.8 kb) were sequenced. Both 1.9 kb-size and 1.8 kb-sizecathepsin L gene contained 4 exons and 3 introns. Exon 1 encoded the signal sequence, pro-region, and N-terminal region (21 amino acid residues) of the mature enzymes. Exons 2-4 encoded the remaining region of the mature enzyme, indicating that the structures of cathepsin L do not correspond to functional units as is the cases in other cathepsin genes. The lengths of the introns were 53-58,158-161, and 694-582bp, respectively. The third introns were quite different from the size and sequences. Interestingly, the Fasciola cathepsin L genes consist of a multigene family, although the mammalian cathepsin L gene is a single gene. Less

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (26 results)

All Other

All Publications (26 results)

  • [Publications] Hirosi,Yamasaki and Takashi Aoki: "Cloning and sequence analysis of the major cysteine protease expressed in the trematode parasite Fasciola sp." Biochemistry and Molecular Biology Intemational. 31. 537-542 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Takashi Aoki and Hiroshi Yamasaki: "A parasite cysteine protease:purification,monoclonal antibodies,cDNA cloning,and possible application." ASEAN Workshop on Biotechnological Approaches to Diagnosis,Prevention,and Treatment of Infectious Diseases.11-14 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 山崎,浩、青木,孝: "肝蛭システインプロテアーゼの一次構造解析." 寄生虫学雑誌. 42. 66 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 山崎,浩、青木,孝: "肝蛭システインプロテアーゼ前駆体cDNAのクローニング." 生化学. 65. 1048 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 山崎,浩、青木,孝: "肝蛭システインプロテアーゼ構造遺伝子の特性." 寄生虫学雑誌. 43. 89 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 山崎,浩、青木,孝: "肝蛭カテプシンL様システインプロテアーゼ遺伝子の構造解析." 生化学. 66. 778 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 山崎,浩: "肝蛭システインプロテアーゼの発現と細胞内輸送." 第2回分子寄生虫学シンポジウム. 28-29 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 山崎,浩、青木,孝: "肝蛭カテプシンL様システインプロテアーゼ遺伝子の特徴." 寄生虫学雑誌. 44. 110 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiroshi Yamasaki and Takashi Aoki: "Cloning and sequence analysis of the major cysteine protease expressed in the trematode parasite Fasciola sp." Biochem.Mol.Biol.Int.31. 537-542 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Takashi Aoki and Hiroshi Yamasaki: "A parasite cysteine protease : purification, monoclonal antibodies, cDNA cloning, and possible application." ASEAN Workshop on Biotechnological Approaches to Diagnosis, Prevention, and Treatment of Infectious Diseases.11-14 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiroshi Yamasaki and Takashi Aoki: "Primary structure of a cysteine protease from adult worms of the liver fluke Fasciola sp." Jap.J.Parasitol.42. 66 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiroshi Yamasaki: "Expression and intracellular transport of a Fasciola cysteine protease." Molecular Parasitology Workshop. 28-29 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiroshi Yamasaki and Takashi Aoki: "Cloning of a cysteine protease precurs or cDNA from adult Fasciola worm." Seikagaku. 65. 1048 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiroshi Yamasaki and Takashi Aoki: "Gene structure of a cathepsin L-like cysteine protease from the liver fluke Fasciola sp." Jap.J.Parasitol.43. 89 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiroshi Yamasaki and Takashi Aoki: "Structural analysis of a cathepsin L-like cysteine protease gene from the liver fluke Fasciola sp." Seikagaku. 66. 778 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiroshi Yamasaki and Takashi Aoki: "Gene structure of a cathepsin L-like cysteine protease from parasitic trematode, Fasciola sp." The 10th International Conference on Intracellular Protein Catabolism.(1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiroshi Yamasaki and Takashi Aoki: "Characterization of genes encoding cathepsin L-like proteases from the liver fluke Fasciola sp." Jap.J.Parasitol.44. 110 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hiroshi Yamasaki and Takashi Aoki: "Cloning and sequence analysis of the major cysteine protease expressed in the trematode parasite Fasciola sp." Biochemistry and Molecular Biology International. 31. 537-542 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] Takashi Aoki and Hiroshi Yamasaki: "A parasite cysteine protease:purification,monoclonal antibodies,cDNA cloning,and possible application." ASEAN Workshop on Biotechnological Approaches to Diagnosis,Prevention,and Treatment of Infectious Diseases.11-14 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] 山崎浩、青木孝: "肝蛭システインプロテアーゼの一次構造解析." 寄生虫学雑誌. 42. 66- (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] 山崎浩、青木孝: "肝蛭システインプロテアーゼ前駆体cDNAのクローニング." 生化学. 65. 1048- (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] 山崎浩、青木孝: "肝蛭システインプロテアーゼ構造遺伝子の特性." 寄生虫学雑誌. 43. 89- (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 山崎浩,青木孝: "肝蛭カテプシンL様システインプロテアーゼ遺伝子の構造解析." 生化学. 66. 778- (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 山崎浩: "肝蛭システインプロテアーゼの発現と細胞内輸送." 第2回 分子寄生虫学シンポジウム. 28-29 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] 山崎浩、青木孝: "肝蛭カテプシンL様システインプロテアーゼ遺伝子の特徴." 寄生虫学雑誌. 44. 110- (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] Hiroshi Yamasaki and Takashi Aoki: "Cloning and sequence analysis of the major cysteine protease expressed in the trematode parasite Fasciola sp." Biochemistry and Molecular Biology International. 31. 537-542 (1993)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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