Non-enveloped, flexuous, filamentous, 800 nm long and 12 nm in diameter.


Linear ssRNA(+) genome of 9 kb in size. The 3' terminus is polyadenylated. Encodes for 6 proteins.


The virion RNA is infectious and serves as both the genome and viral messenger RNA. RNA-dependent RNA polymerase (RdRp) is translated directly from the genomic RNA. The other ORFS are presumably transcribed as monocistronic subgenomic mRNAs (sgRNAs).



  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 as a monocistronic mRNA to produce the RdRp (encoded by the 5'-proximal ORF).
  4. Replication occurs in viral factories recruited by TGB1. A dsRNA genome is synthesized from the genomic ssRNA(+).
  5. The dsRNA genome is transcribed/replicated thereby providing viral mRNAs/new ssRNA(+) genomes.
  6. Internal subgenomic promoters are used to transcribe the sgRNAs. Traduction of these sgRNAs yields the capsid and movement proteins.
  7. Assembly of new virus particles.
  8. Triple gene block proteins (TGBp) allow cell-to-cell and long-distance movement.

Matching UniProtKB/Swiss-Prot entries

6 entries grouped by protein (browse by keywords)

1 entry

Capsid protein (CP) (Coat protein)

Shallot virus X (ShVX) reference strain

1 entry

Uncharacterized ORF4 protein (42 kDa protein)

Shallot virus X (ShVX) reference strain

1 entry

RNA replication protein (194 kDa protein)

Shallot virus X (ShVX) reference strain

1 entry

Movement and silencing protein TGBp1 (25 kDa protein) (Silencing suppressor P25) (Triple gene block 1 protein) (TGBp1)

Shallot virus X (ShVX) reference strain

1 entry

Movement protein TGB2 (12 kDa protein) (Triple gene block 2 protein) (TGBp2)

Shallot virus X (ShVX) reference strain

1 entry

14.7 kDa protein (Putative nucleic acid-binding protein)

Shallot virus X (ShVX) reference strain