The genome of Dasychira pudibunda nucleopolyhedrovirus (DapuNPV) reveals novel genetic connection between baculoviruses infecting moths of the Lymantriidae family. (December 2015)

• Record Type: Journal Article
• Authors: Krejmer, Martyna; Skrzecz, Iwona; Wasag, Bartosz; Szewczyk, Boguslaw; Rabalski, Lukasz
• Is Part Of: BMC genomics. Volume 16:Number 1(2015)
• Page Start: 1
• Page End: 13
• Publication Date: 2015-12
• Subjects: Baculovirus -- Next generation sequencing -- DapuNPV -- Pale tussock moth -- Dasychira pudibunda -- OpMNPV; Genomes -- Periodicals; Gene mapping -- Periodicals; Genomics -- Periodicals; Base Sequence -- Periodicals; Chromosome Mapping -- Periodicals; Genetic Techniques -- Periodicals; Sequence Analysis, DNA -- Periodicals; 572.8605
• DOI: 10.1186/s12864-015-1963-9
• Languages: English
• ISSNs: 1471-2164

Abstract

Abstract Background DapuNPV (Dasychira pudibunda nucleopolyhedrovirus), presented in this report, belongs toAlphabaculovirus group Ib. Its full, newly sequenced genome shows close relationship to baculovirus OpMNPV isolated from douglas-fir tussock mothOrgyia pseudotsugata . Baculovirus DapuNPV is a natural limiter of pale tussock mothDasychira pudibunda L. (syn.Calliteara pudibunda L.)(Lepidoptera, Lymantriidae ), which can occur in a form of an outbreak on many species of deciduous trees and may cause significant economic losses in the forests. Methods Late instars dead larvae of pale tussock moth were mechanically homogenized and polyhedra were purified during series of ultracentrifugation. Viral DNA was extarcted and sequenced using Miseq Illumina platform. 294, 902 paired reads were used for de novo assembling. Genome annotation, multiple allingment to others baculoviruses and phylogegentic analises were perform with the use of multiple bioinformatic tools like: Glimmer3, HMMER web server, Geneious 7 and MEGA6. Results The genome of DapuNPV is 136, 761 bp long with AT pairs content 45.6 %. The predicted number of encoded putative open reading frames (ORFs) is 161 and six of them demonstrate low or no homology to ORFs previously found in baculoviruses. DapuNPV genome shows very high similarity to OpMNPV in a nucleotide sequence (91.1 % of identity) and gene content (150 homologous ORFs), though some major differences (e.g. lack of he65 in OpMNPV) have also been noted. Conclusions Similarly to other members of theBaculoviridae family, DapuNPV baculovirus possesses highly conserved core genes. Among them, there is a second copy of occluded derived virus envelope 27 protein (odv-e27 ), which was previously found only in a member ofAlphabaculovirus group II – LyxyMNPV (Lymantria xylina MNPV). Surprisingly enough, DapuNPV and LyxyMNPV genomes share also another feature. Phylogenetic analysis of chitin binding family protein (cbpl ) indicates significant similarity of those two baculoviruses from distinct evolutionary groups which infect the same hosts fromLymantriidae . The ubiquitin like family gene (ubil ), which has not been described until now, is another characteristic component of DapuNPV genome.