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  • Title: Sequence polymorphism in the Trypanosoma rangeli HSP70 coding genes allows typing of the parasite KP1(+) and KP1(-) groups.
    Author: Cuervo C, Thomas MC, López MC, Puerta CJ.
    Journal: Exp Parasitol; 2013 Apr; 133(4):447-53. PubMed ID: 23333618.
    Abstract:
    The genes encoding the Trypanosoma rangeli heat shock protein 70kDa were sequenced and their genomic organization determined. This human parasite has medical relevance as it shares antigens, hosts and geographical regions with the etiological agent of Chagas' disease, Trypanosoma cruzi. The T. rangeli HSP70 genes are highly conserved regarding their tandem organization, and deduced amino acid sequences among T. rangeli KP1(+) and KP1(-) groups and other trypanosomatids. Nevertheless, a variable number of the immunogenic GMPG motif was observed among HSP70 copies within the same T. rangeli isolate and among different isolates. Interestingly, a polymorphism at nucleotide level affecting the SphI restriction site allowed the differentiation of KP1(-) and KP1(+) groups.
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