Viruses, Vol. 13, Pages 2166: Construction of an Influenza D Virus with an Eight-Segmented Genome

Viruses, Vol. 13, Pages 2166: Construction of an Influenza D Virus with an Eight-Segmented Genome Viruses doi: 10.3390/v13112166 Authors: Hiroho Ishida Shin Murakami Haruhiko Kamiki Hiromichi Matsugo Misa Katayama Wataru Sekine Kosuke Ohira Akiko Takenaka-Uema Taisuke Horimoto Influenza D virus (IDV) may cause the bovine respiratory disease complex, which is the most common and costly disease affecting the cattle industry. Previously, we revealed that eight segments could be actively packaged in its single virion, suggesting that IDV with the seven-segmented genome shows an agnostic genome packaging mechanism. Herein, we engineered an eight-segmented recombinant IDV in which the NS1 or NS2 genes were separated from NS segment into independent segments (NS1 or NS2 segments, respectively), leading to monocistronic translation of each NS protein. We constructed two plasmids: one for the viral RNA (vRNA)-synthesis of the NS1 segment with a silent mutation at the splicing acceptor site, which controls NS2 transcription in the NS segment; and another for the RNA synthesis of the NS2 segment, with deletion of the intron in the NS segment. These plasmids and six other vRNA-synthesis plasmids were used to fabricate an infectious eight-segmented IDV via reverse genetics. This system enables analysis of the functions of NS1 or NS2. We tested the requirement of the N-terminal overlapping region (NOR) in these proteins for viral infectivity. We rescued a virus with...
Source: Viruses - Category: Virology Authors: Tags: Article Source Type: research