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  • Title: Detection of a serine proteinase gene in Acanthamoeba genotype T6 (Amoebozoa: Lobosea).
    Author: Blaschitz M, Köhsler M, Aspöck H, Walochnik J.
    Journal: Exp Parasitol; 2006 Sep; 114(1):26-33. PubMed ID: 16545805.
    Abstract:
    Cytopathic proteins are assumed to contribute to the pathogenicity of Acanthamoeba spp. due to their degrading capacity that is required for tissue invasion. In this study, a serine proteinase gene was demonstrated in a highly virulent Acanthamoeba keratitis causing strain with genotype T6. This gene was detected in both, the genomic DNA and the cDNA by PCR and subsequent sequencing. The gene fragment comprises about 500 bp and exhibits high sequence similarity to the serine proteinases of Acanthamoeba strains with genotype T4 and T12. The detection of a serine proteinase in this Acanthamoeba T6 strain is significant, because while T4 is the most common genotype among pathogenic Acanthamoeba strains and also T12 is known to be associated with disease, this is the only virulent Acanthamoeba T6 strain known to date. Obviously, this serine proteinase represents a common tool in pathogenic processes during Acanthamoeba infection.
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