Human pegivirus (HPgV) isolates characterized by deep sequencing from HCV- and HIV-RNA positive blood donations, France

Human pegivirus (HPgV, formerly GBV-C) is a member of the genus Pegivirus, family Flaviviridae. Despite its identification more than 20 years ago, both natural history and distribution of this viral group in human hosts remain under exploration. Analysis of HPgV genomes characterized up to now points out the scarcity of French pegivirus sequences in databases. In order to bring new data regarding HPgV genomic diversity, we investigated 16 French isolates obtained from HCV- and HIV-RNA positive blood donations following deep sequencing and coupled molecular protocols. Initial phylogenetic analysis of 5'UTR / E2 partial sequences permitted to assign HPgV isolates to genotypes 2 (n=15) and 1 (n=1), with up to 16% genetic diversity observed for both regions considered. Seven nearly-full length representative genomes were characterized subsequently, with complete polyprotein coding sequences exhibiting up to 13% genetic diversity; closest nucleotide divergence with available HPgV sequences was in the range 7-11%. A 36nt deletion located on the NS4B coding region (N-terminal part, 12aa) of the genotype 1 HPgV genome characterized was identified, along with single nucleotide deletions in two genotype 2 5'UTR sequences. This article is protected by copyright. All rights reserved.