Alphapaprhavirus (taxid:2842541)

VIRION

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Unknown, discovered using viral metagenomics. Presumably enveloped, bullet shaped.

GENOME

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Negative-stranded RNA linear genome, about 11.5 kb in size. Encodes for six proteins.

Enzymes: RNA dependent RNA polymerase, RNA guanylyl transferase, mRNA methyltransferase.

GENE EXPRESSION

The viral RNA dependent RNA polymerase binds the encapsidated genome at the leader region, then sequentially transcribes each genes by recognizing start and stop signals flanking viral genes. mRNAs are capped and polyadenylated by the L protein during synthesis.

ENZYMES

REPLICATION

CYTOPLASMIC

  1. Attachment of the viral G glycoproteins to host receptors mediates endocytosis of the virus into the host cell.
  2. Fusion of virus membrane with the vesicle membrane; ribonucleocapsid is released into the cytoplasm.
  3. Sequential transcription , viral mRNAs are capped and polyadenylated by polymerase stuttering in the cytoplasm.
  4. Replication presumably starts when enough nucleoprotein is present to encapsidate neo-synthetized antigenomes and genomes.
  5. The ribonucleocapsid binds to the matrix protein and buds, releasing new virions.
These structures were created with the help of Colabfold by Jason Nomburg, Nathan Price and Jennifer Doudna (ModelArchive).

Hubei lepidoptera virus 2 taxid:1922904

Protein ModelArchive
Matrix protein ma-jd-viral-11587
Nucleoprotein (Nucleocapsid protein) ma-jd-viral-15082
Phosphoprotein ma-jd-viral-44619
Putative glycoprotein 1 ma-jd-viral-07037
Putative glycoprotein 2 ma-jd-viral-31520