Non-enveloped, 25-30 nm in diameter, T=pseudo3 icosahedral capsid.


Segmented, bipartite linear ssRNA(+) genome of 7 kb for RNA1 and 4.6 to 5.4 kb for RNA2. The 5' terminus has a genome-linked protein (VPg).


The virion RNA are infectious and serves as both the genome and viral messenger RNA. Both RNA encode a single polyprotein which is processed to yield the mature proteins.



  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 replicase polyprotein RNA-1.
  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.
  7. Movement protein allows cell-to-cell movement.

Matching UniProtKB/Swiss-Prot entries

2 entries grouped by strain (browse by keywords)

2 entries

Satsuma dwarf virus (isolate Satsuma mandarin/Japan/S-58/1977) (SDV) reference strain

POL2_SDVS5 RNA2 polyprotein (P2) [Cleaved into: Movement protein (MP); Large capsid protein (LCP); Small capsid ...
POL1_SDVS5 RNA1 polyprotein (P1) [Cleaved into: Putative helicase (EC 3.6.4.-) (Putative NTP-binding protein); ...