Allexivirus (taxid:140568)



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

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6 entries grouped by strain

6 entries

Shallot virus X (ShVX) reference strain

RDRP_SHVX RNA replication protein (194 kDa protein) [Includes: RNA-directed RNA polymerase (EC; ...
CAPSD_SHVX Capsid protein (CP) (Coat protein)
VNBP_SHVX 14.7 kDa protein (Putative nucleic acid-binding protein)
TGB1_SHVX Movement and silencing protein TGBp1 (25 kDa protein) (Silencing suppressor P25) (Triple gene block ...
TGB2_SHVX Movement protein TGB2 (12 kDa protein) (Triple gene block 2 protein) (TGBp2)
ORF4_SHVX Uncharacterized ORF4 protein (42 kDa protein)