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1 results

  • cDNA cloning, expression and characterization of a Boophilus microplus paramyosin

  • C. A. S. FERREIRA, M. C. BARBOSA, T. C. L. SILVEIRA, J. G. VALENZUELA, I. DA SILVA VAZ JR, A. MASUDA
  • Journal:
    Parasitology / Volume 125 / Issue 3 / September 2002
    Published online by Cambridge University Press:
    16 January 2003, pp. 265-274

  • The tick Boophilus microplus is a 1-host tick that causes important losses to bovine herds, and protective antigens are being investigated in order to develop vaccines that avoid the use of acaricides. Paramyosins are multi-functional invertebrate muscle proteins, whose roles may include host immunomodulation, and seem to be a prominent candidate in a schistosomiasis vaccine. We report here the cloning, expression and characterization of a B. microplus paramyosin (BmPRM). Sequence analysis of the full length coding sequence cDNA shows high identity to other arthropod paramyosin sequences, and the predicted molecular weight, pI and secondary structure are consistent with a typical paramyosin. Western-blot expression analysis indicates the presence of BmPRM in all tissues and developmental stages tested, but not in saliva. The recombinant protein (rBmPRM) was shown to bind both IgG and collagen. Possible implications of these activities with host evasion mechanisms are discussed.