A proteína de filtração celular de Plasmodium vivax para a sequência de genes de Ookinetes e Sporozoites (PvCelTOS) e potenciais epítopos são altamente conservadas entre isolados de diferentes regiões da Amazônia brasileira/Plasmodium vivax Cell Traversal Protein for Ookinetes and Sporozoites (PvCelTOS) gene sequence and potential epitopes are highly conserved among isolates from different regions of Brazilian Amazon
Chaves, Lana Bitencourt; Perce-da-Silva, Daiana de Souza; Rodrigues-da-Silva, Rodrigo Nunes; Silva , João Hermínio Martins da; Cassiano, Gustavo Capatti; Machado, Ricardo Luiz Dantas; Pratt-Riccio, Lilian Rose; Banic, Dalma Maria; Lima Junior, Josué da Costa.
PLoS Negl Trop Dis
; 11(2): 1-19, 2017. ilus, tab
Artigo
em Inglês
| Instituto Evandro Chagas (SOPHIA) | ID: iec-16095
The Plasmodium vivax Cell-traversal protein for ookinetes and sporozoites (PvCelTOS) plays an important role in the traversal of host cells. Although essential to PvCelTOS progress as a vaccine candidate, its genetic diversity remains uncharted. Therefore, we investigated the PvCelTOS genetic polymorphism in 119 field isolates from five different regions of Brazilian Amazon (Manaus, Novo Repartimento, Porto Velho, Pla A cido de Castro and Oiapoque). Moreover, we also evaluated the potential impact of non-synonymous mutations found in the predicted structure and epitopes of PvCelTOS. The field isolates showed high similarity (99.3% of bp) with the reference Sal-1 strain, presenting only four Single-Nucleotide Polymorphisms (SNP) at positions 24A, 28A, 109A and 352C. The frequency of synonymous C109A (82%) was higher than all others (p<0.0001). However, the non-synonymous G28A and G352C were observed in 9.2% and 11.7% isolates. The great majority of the isolates (79.8%) revealed complete amino acid sequence homology with Sal-1, 10.9% presented complete homology with Brazil I and two undescribed PvCelTOS sequences were observed in 9.2% field isolates. Concerning the prediction analysis, the N-terminal substitution (Gly10Ser) was predicted to be within a B-cell epitope (PvCelTOS Accession Nos. AB194053.1) and exposed at the protein surface, while the Val118Leu substitution was not a predicted epitope. Therefore, our data suggest that although G28A SNP might interfere in potential B-cell epitopes at PvCelTOS N-terminal region the gene sequence is highly conserved among the isolates from different geographic regions, which is an important feature to be taken into account when evaluating its potential as a vaccine candidate
Biblioteca responsável:
BR275.1
Localização: PCIEC2017 / BR275.1
Texto completo
Documentos relacionados