Quaranjavirus (taxid:1299308)



Enveloped, spherical. The virions are 80-120 nm in diameter



segmented ssRNA(-) linear genome, encapsidated by nucleoprotein (NP) Contains 6 segments coding for 6 proteins. Segments size range from 0.9 to 2.3 kb. Genome total size is about 10 Kb


Viral RNA polymerase (PB1, PB2 and PA) transcribes one mRNA from each genome segment. Transcription is primed by cap snatching. mRNA are polyadenylated by the viral polymerase stuttering on a poly U track. Segment 6 mRNA can be alternatively spliced, giving rise to mRNA coding for M1 proteins.




  1. Virus attaches to sialic acid receptor though GP protein and is endocytosed by clathrins in the host cell.
  2. endosome acidification induces fusion of virus membrane with the vesicle membrane; encapsidated RNA segments migrate to the nucleus.
  3. Transcription of genomic segments by the viral polymerase produces mRNAs that are capped and polyadenylated by the viral polymerase.
  4. Replication of genomic segments.
  5. High level of M1 protein induces genomes segments export from nucleus by NEP protein.
  6. Virus assembly and budding occurs at the plasma membrane.

Matching UniProtKB/Swiss-Prot entries

(all links/actions below point to uniprot.org website)

6 entries grouped by strain

6 entries

Quaranfil virus (isolate QrfV/Tick/Afghanistan/EG_T_377/1968) (QRFV) reference strain

ENV_QRFVE Envelope glycoprotein
RDRP_QRFVE RNA-directed RNA polymerase catalytic subunit (EC
PA_QRFVE Polymerase acidic protein (PA)
NCAP_QRFVE Nucleoprotein (Nucleocapsid protein) (Protein N)
PB2_QRFVE Polymerase basic protein 2 (PB2)
M1_QRFVE Probable matrix protein