Narnavirus (taxid:186767)



No true virion, no structural proteins. Genomes are associated with their RdRp in the cytoplasm.



Monopartite, linear, ssRNA(+) genome of of 2.5-2.9 kb.


The virion RNA is infectious and serves as both the genome and viral messenger RNA. The genome has one ORF encoding an RNA-dependent RNA polymerase.




  1. Virus genome is transmitted horizontally through mating or vertically from mother to daughter cells.
  2. Translation of genomic RNA produces viral RdRp.
  3. A dsRNA genome is synthesized from the genomic ssRNA(+).
  4. The dsRNA genome is transcribed/replicated thereby providing viral mRNAs/new ssRNA(+) genomes.

Matching UniProtKB/Swiss-Prot entries

(all links/actions below point to website)

2 entries grouped by strain

1 entry

Saccharomyces 20S RNA narnavirus (ScNV-20S) reference strain

RDRP_SCV20 RNA-directed RNA polymerase (EC (p91)

1 entry

Saccharomyces 23S RNA narnavirus (ScNV-23S)

RDRP_SCV23 RNA-directed RNA polymerase (EC (p104)
These structures were created with the help of Colabfold by Jason Nomburg, Nathan Price and Jennifer Doudna (ModelArchive).

Fusarium poae narnavirus 1 taxid:1849531

Protein ModelArchive
RNA-dependent RNA polymerase ma-jd-viral-36294

Fusarium poae narnavirus 2 taxid:1849532

Protein ModelArchive
RNA-dependent RNA polymerase ma-jd-viral-46570

Grapevine associated narnavirus-1 taxid:908834

Protein ModelArchive
RNA dependent RNA polymerase ma-jd-viral-19087