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Title: Identification and characterization of the Plasmodium falciparum RhopH2 ortholog in Plasmodium vivax
Authors: Bo Wang
Feng Lu
Yang Cheng
Jian Li
Daisuke Ito
Jetsumon Sattabongkot
Takafumi Tsuboi
Eun Taek Han
Kangwon National University
Jiangsu Institute of Parasitic Diseases
Ehime University
Mahidol University
Keywords: Agricultural and Biological Sciences;Immunology and Microbiology;Medicine;Veterinary
Issue Date: 1-Feb-2013
Citation: Parasitology Research. Vol.112, No.2 (2013), 585-593
Abstract: Plasmodium vivax is one of the most important human malaria species that is geographically widely endemic and potentially affects a larger number of people than its more notorious cousin, Plasmodium falciparum. During invasion of red blood cells, the parasite requires the intervention of high molecular weight complex rhoptry proteins (RhopH) that are also essential for cytoadherence. PfRhopH2, a member of the RhopH multigene family, has been characterized as being crucial during P. falciparum infection. This study describes identifying and characterizing the pfrhoph2 orthologous gene in P. vivax (hereinafter named pvrhoph2). The PvRhopH2 is a 1,369-amino acid polypeptide encoded by PVX-099930 gene, for which orthologous genes have been identified in other Plasmodium species by bioinformatic approaches. Both P. falciparum and P. vivax genes contain nine introns, and there is a high degree of similarity between the deduced amino acid sequences of the two proteins. Moreover, PvRhopH2 contains a signal peptide at its N-terminus and 12 cysteines predominantly in its C-terminal half. PvRhopH2 is localized in one of the apical organelles of the merozoite, the rhoptry, and the localization pattern is similar to that of PfRhopH2 in P. falciparum. The recombinant PvRhopH2 protein is recognized by serum antibodies of patients naturally exposed to P. vivax, suggesting that PvRhopH2 is immunogenic in humans. © 2012 Springer-Verlag Berlin Heidelberg.
ISSN: 14321955
Appears in Collections:Scopus 2011-2015

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