Satellite virus: The virus needs a helper virus for viral replication. Infection requires host cell to be co-infected with a virus from the genus Tobamovirus.


Non-enveloped, spherical, T=1 icosahedral capsid, about 17 nm in diameter. Sixty copies of the capsid protein form the capsid.


Linear, ssRNA(+) genome of about 1 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 and an unknown ORF.



  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)

2 entries

Satellite tobacco mosaic virus (STMV)

V07K_STMV 6.8 kDa protein
COAT_STMV Coat protein