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- W2015808889 abstract "Porcine reproductive and respiratory syndrome virus (PRRSV) is known to be genetically highly variable, but knowledge of sequence diversity from Eastern Canada and its degree of genetic plasticity in or near the principal neutralizing epitope (PNE) in association with evolutionary selective pressure is limited. The purposes of our study were to investigate the extent of strain diversity, the existing glycotypes and the amino acid sites under selective evolutionary pressure in its encoded protein, GP5, for a dataset of 1301 sequences (1998–2009). This was addressed by partitioning and clustering into subgenotypes a large number of open reading frame 5 sequences from the province of Quebec and analyzing the content of these subgenotypes. The overall pairwise diversity was 12% and was comparable to what has been reported around the world. The mean diversity for sequences within subgenotypes was around 7%. No marked variations in subgenotype emergence could be observed through time. Thirty-eight GP5 glycotype patterns were observed which included a newly identified site at position N57 which was already present in 1998. These patterns possessed one to six N-glycosylation sites in total and could be located in eight different positions. No obvious grouping of glycotypes could be established in relation to subgenotypes. Positions N44 and N51 were confirmed to be fixed N-glycosylation positions, whereas other positions where found to be shifting and located in or near hypervariable regions (HVRs) 1 and 2. Both HVRs were under selective evolutionary pressure in half of all subgenotypes including vaccine-like groups. Conversely, the PNE flanked by both HVRs was well conserved among most subgenotypes demonstrating potential molecular constraint in a probable viral binding region. The analysis of this dataset increased knowledge of evolutionary change inferred from genetic data, more specifically regarding the implications of both HVRs in PRRSV diversity." @default.
- W2015808889 created "2016-06-24" @default.
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- W2015808889 date "2012-07-01" @default.
- W2015808889 modified "2023-10-18" @default.
- W2015808889 title "Porcine reproductive and respiratory syndrome virus diversity of Eastern Canada swine herds in a large sequence dataset reveals two hypervariable regions under positive selection" @default.
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- W2015808889 doi "https://doi.org/10.1016/j.meegid.2012.03.015" @default.
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