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Identification of Functional Protein Regions Through Chimeric Protein Construction
11:39

Identification of Functional Protein Regions Through Chimeric Protein Construction

Published on: January 8, 2019

Molecular cloning of genes encoding oncosphere proteins reveals conservation of modular protein structure in cestode

Charles Gauci1, Marshall W Lightowlers

  • 1Molecular Parasitology Laboratory, The University of Melbourne, Princes Highway, Werribee, 3030, Vic., Australia. charlesg@unimelb.edu.au

Molecular and Biochemical Parasitology
|April 4, 2003
PubMed

Insights

Molecular cloning reveals highly conserved oncosphere antigens and genes across multiple tapeworm species. This structural conservation suggests these proteins are crucial for parasite infection and survival, offering potential for new vaccine development against diseases like cysticercosis.

Area of Science:

  • Parasitology
  • Molecular Biology
  • Immunology

Background:

  • Recombinant oncosphere antigens show promise as vaccines against parasitic diseases like cysticercosis and hydatid disease.
  • Structural comparisons of these antigens and their genes suggest shared characteristics.

Purpose of the Study:

  • To compare the molecular structure of oncosphere antigens and genes from various taeniid cestode species using molecular cloning.
  • To investigate the conservation of gene structure and protein domains among these antigens.

Main Methods:

  • Molecular cloning of oncosphere antigen genes from Taenia solium, Taenia ovis, and Taenia saginata.
  • Comparison of gene sequences, exon/intron structures, and deduced amino acid sequences.
  • Analysis of conserved protein domains, including secretory signals and fibronectin type III domains.

Main Results:

  • Highly conserved exon/intron structures were observed in genes from T. solium and T. ovis (tsol16 and to16).
  • Two closely related tsol16 genes were identified in T. solium, with their proteins showing significant conservation with to16.
  • Substantial conservation in gene structure and exon organization was found across multiple taeniid species, with conserved regions encoding key protein domains.

Conclusions:

  • The striking conservation of oncosphere antigen genes and their exon structure across taeniid species highlights their functional importance.
  • Conserved regions encode a putative secretory signal and fibronectin type III domain, indicating a modular protein structure.
  • This conserved structure suggests these proteins play vital roles in host infection and parasite survival, supporting their potential as vaccine targets.

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