ArticlePathogens and global health2015
In silico analysis for structure, function and T-cell epitopes of a hypothetical conserved (HP-C) protein coded by PVX_092425 in Plasmodium vivax.
Article in Pathogens and global health, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectivePlasmodium spp. merozoite glycosylphosphatidylinositol-anchored proteins (GPI-APs) considered as protective immunogen in novel vaccines against malaria. To analyze the structure and function of a hypothetical conserved (HP-C) GPI-AP coded by gene PVX_092425 from Plasmodium vivax, and find its potential T-cell epitopes for further vivax malaria vaccine study.
methodsThe structure, function and T-cell epitopes of the HP-C protein named Pvx_092425 were analyzed and predicted by online and offline bioinformatics software.
resultsThe bioinformatics data showed that the Pvx_092425 is an 830 amino acid (AA) long polypeptide encoded by five exons gene PVX_092425.It contains a pectin lyase-like superfamily, an AA repeats region, a cys-rich region and a transmembrane domain (TM) in C-terminal region. The alignment analysis drew it has a unique AA repeats region among Plasmodium spp. It was located in the cytoplasm, secretory system or cellular nucleus of P. vivax merozoite. For the sequence, the fragment of I823-V829 inserts in the interior side of the membrane, and M1--A812 belongs to the cytoplasmic tail. It has seven protein-protein binding sites. The peptides with the best predicted binding affinities were human leucocyte antigen (HLA) HLA-A*0203, HLA-DRB1*0101 and HLA- DRB1*0701.Among these predicted peptides, 582FLWDKALFD590 epitope interacted with HLA-DRB1*0101 allele showed best binding affinity compared to others. Structural analysis explained that the epitope fits well into the epitope-binding groove of HLA-DRB1*0101.
conclusionsIt proposes that the Pvx_092425 plays a key role during erythrocyte stage and generates information that is useful for development of blood-stage vaccine to block the merozoites invasion.
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