Analysis of a new negevirus-like sequence from Bemisia tabaci unveils a potential new taxon linking nelorpi- and centiviruses

PLoS One. 2024 May 16;19(5):e0303838. doi: 10.1371/journal.pone.0303838. eCollection 2024.

Abstract

This study presents the complete genome sequence of a novel nege-like virus identified in whiteflies (Bemisia tabaci MEAM1), provisionally designated as whitefly negevirus 1 (WfNgV1). The virus possesses a single-stranded RNA genome comprising 11,848 nucleotides, organized into four open reading frames (ORFs). These ORFs encode the putative RNA-dependent-RNA-polymerase (RdRp, ORF 1), a glycoprotein (ORF 2), a structural protein with homology to those in the SP24 family, (ORF 3), and a protein of unknown function (ORF 4). Phylogenetic analysis focusing on RdRp and SP24 amino acid sequences revealed a close relationship between WfNgV1 and Bemisia tabaci negevirus 1, a negevirus sequence recently discovered in whiteflies from Israel. Both viruses form a clade sharing a most recent common ancestor with the proposed nelorpivirus and centivirus taxa. The putative glycoprotein from ORF 2 and SP24 (ORF 3) of WfNgV1 exhibit the characteristic topologies previously reported for negevirus counterparts. This marks the first reported negevirus-like sequence from whiteflies in the Americas.

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Genome, Viral*
  • Hemiptera* / genetics
  • Hemiptera* / virology
  • Open Reading Frames* / genetics
  • Phylogeny*
  • RNA, Viral / genetics
  • RNA-Dependent RNA Polymerase / genetics
  • Viral Proteins / genetics

Grants and funding

The author(s) received no specific funding for this work.