Satellite virus: The virus does not encode for a capsid and needs a helper virus for encapsidation and aphid transmission. Infection requires host cell to be co-infected with a virus from the genus Panicovirus, family Tombusviridae.



Non-enveloped, spherical, icosahedral, about 17 nm in diameter.



Linear, ssRNA(+) genome of 0.8 kb, which lacks a cap structure and a poly(A)tail.


The virion RNA is infectious and serves as both the genome and viral messenger RNA. Encodes one capsid protein.



  1. Virus penetrates into the host cell.
  2. Uncoating, and release of the viral genomic RNA into the cytoplasm.
  3. The viral RNA is translated to produce the capsid protein.
  4. Replication takes place in cytoplasmic viral factories. A dsRNA genome is synthesized from the genomic ssRNA(+).
  5. The dsRNA genome is transcribed/replicated thereby providing viral mRNAs/new ssRNA(+) genomes.
  6. Virus assembly.
  7. Virus release.

Matching UniProtKB/Swiss-Prot entries

2 entries grouped by strain (browse by keywords)

1 entry

Satellite panicum mosaic virus (SPMV) reference strain

COAT_SPMV Coat protein (Capsid protein)

1 entry

Satellite St. Augustine decline virus (SSADV)

COAT_SSADV Coat protein (Capsid protein)