Molecular biology


Virions have rod-shaped particles with modal lengths of 320-360 nm and diameters of 18 nm. They do not have an envelope structure.


The genome is segmented; bipartite. After deproteinization of purified virions, both single stranded and double stranded RNA are detected.


These viruses contain a single coat protein (CP) with an Mr of approximately 48 kDa and do not possess an envelope structure.



  1. Virus enters into host cells by mechanical injection or through plasmodesmatas
  2. Transcription, viral mRNAs are capped in the cytoplasm.
  3. Replication presumably starts when enough nucleoprotein is present to encapsidate neo-synthetized antigenomes and genomes.
  4. The ribonucleocapsids migrates to new cells using movement proteins.

Matching UniProtKB/Swiss-Prot entries

6 entries grouped by strain (browse by keywords)

6 entries

Lettuce big-vein associated virus (isolate Japan/Kagawa) (LBVaV) reference strain

NCAP_LBVAV Nucleoprotein (NP) (Nucleocapsid protein) (Protein N)
VP3_LBVAV Protein 3
VP5_LBVAV Protein 5
VP4_LBVAV Protein 4
L_LBVAV RNA-directed RNA polymerase L (Protein L) (Large structural protein) (Replicase) (Transcriptase) ...
VP2_LBVAV Protein 2