Non-enveloped, 30 nm in diameter, T=pseudo3 icosahedral capsid.


Linear ssRNA(+) genome of about 12 kb. The 5’ terminus has a genome-linked protein (VPg). A poly (A) tract is present at the 3’-end of the Waikavirus genus.


The virion RNA is infectious and serves as both the genome and viral messenger RNA. The genome single (or major) ORF is translated into a polyprotein which is subsequently processed by virus-encoded proteases into functional products. There may be also be two small ORFs near the 3’-end.



  1. Virus penetrates into the cell.
  2. Uncoating, and release of the viral genomic RNA into the cytoplasm.
  3. Synthesis and proteolytic cleavage of the viral polyprotein.
  4. Replication occurs in viral factories made of membrane vesicles derived from the ER. A dsRNA genome is synthesized from the genomic ssRNA(+).
  5. The dsRNA genome is transcribed/replicated thereby providing viral mRNAs/new ssRNA(+) genomes.
  6. Assembly of new virus particles.

Matching UniProtKB/Swiss-Prot entries

2 entries grouped by strain (browse by keywords)

1 entry

Rice tungro spherical virus (strain A) (RTSV) (Rice tungro spherical waikavirus) reference strain

POLG_RTSVAGenome polyprotein

1 entry

Rice tungro spherical virus (strain Vt6) (RTSV) (Rice tungro spherical waikavirus)

POLG_RTSVTGenome polyprotein