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Characterization of Pv92, a novel merozoite surface protein of Plasmodium vivax

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Date
31/08/2016
Author
Lee, Seong-Kyun
Wang, Bo
Han, Jin-Hee
Nyunt, Myat Htut
Muh, Fauzi
Chootong, Patchanee
Ha, Kwon-Soo
Park, Won Sun
Hong, Seok-Ho
Park, Jeong-Hyun
Han, Eun-Taek
Keywords
Plasmodium vivax
Pv92
Merozoite surface protein
Antigenicity
QH301 Biology
QR180 Immunology
NDAS
SDG 3 - Good Health and Well-being
Metadata
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Abstract
The discovery and understanding of antigenic proteins are essential for development of a vaccine against malaria. In Plasmodium falciparum, Pf92 have been characterized as a merozoite surface protein, and this protein is expressed at the late schizont stage, but no study of Pv92, the orthologue of Pf92 in P. vivax, has been reported. Thus, the protein structure of Pv92 was analyzed, and the gene sequence was aligned with that of other Plasmodium spp. using bioinformatics tools. The recombinant Pv92 protein was expressed and purified using bacterial expression system and used for immunization of mice to gain the polyclonal antibody and for evaluation of antigenicity by protein array. Also, the antibody against Pv92 was used for subcellular analysis by immunofluorescence assay. The Pv92 protein has a signal peptide and a sexual stage s48/45 domain, and the cysteine residues at the N-terminal of Pv92 were completely conserved. The N-terminal of Pv92 was successfully expressed as soluble form using a bacterial expression system. The antibody raised against Pv92 recognized the parasites and completely merged with PvMSP1-19, indicating that Pv92 was localized on the merozoite surface. Evaluation of the human humoral immune response to Pv92 indicated moderate antigenicity, with 65% sensitivity and 95% specificity by protein array. Taken together, the merozoite surface localization and antigenicity of Pv92 implicate that it might be involved in attachment and invasion of a merozoite to a new host cell or immune evasion during invasion process.
Citation
Lee , S-K , Wang , B , Han , J-H , Nyunt , M H , Muh , F , Chootong , P , Ha , K-S , Park , W S , Hong , S-H , Park , J-H & Han , E-T 2016 , ' Characterization of Pv92, a novel merozoite surface protein of Plasmodium vivax ' , Korean Journal of Parasitology , vol. 54 , no. 4 , pp. 385-391 . https://doi.org/10.3347/kjp.2016.54.4.385
Publication
Korean Journal of Parasitology
Status
Peer reviewed
DOI
https://doi.org/10.3347/kjp.2016.54.4.385
ISSN
0023-4001
Type
Journal article
Rights
© 2016, Korean Society for Parasitology and Tropical Medicine This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/18129

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