Abstract:
:The aim of this study was to estimate substitution rate and imprints of natural selection on parvovirus B19 genotype 1. Studied datasets included 137 near complete coding B19 genomes (positions 665 to 4851) for phylogenetic and substitution rate analysis and 146 and 214 partial genomes for selection analyses in open reading frames ORF1 and ORF2, respectively, collected 1973-2012 and including 9 newly sequenced isolates from Serbia. Phylogenetic clustering assigned majority of studied isolates to G1A. Nucleotide substitution rate for total coding DNA was 1.03 (0.6-1.27) x 10-4 substitutions/site/year, with higher values for analyzed genome partitions. In spite of the highest evolutionary rate, VP2 codons were found to be under purifying selection with rare episodic positive selection, whereas codons under diversifying selection were found in the unique part of VP1, known to contain B19 immune epitopes important in persistent infection. Analyses of overlapping gene regions identified nucleotide positions under opposite selective pressure in different ORFs, suggesting complex evolutionary mechanisms of nucleotide changes in B19 viral genomes.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Stamenković GG,Ćirković VS,Šiljić MM,Blagojević JV,Knežević AM,Joksić ID,Stanojević MPdoi
10.1038/srep35759subject
Has Abstractpub_date
2016-10-24 00:00:00pages
35759issn
2045-2322pii
srep35759journal_volume
6pub_type
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