Tungrovirus

VIRION

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Non enveloped, bacilliform particles of 130 x 30 nm. The capsid is presumably based on a T=3 icosahedral symmetry.

GENOME

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Circular double stranded DNA of about 8000 base pairs with discontinuities in both strands: one in the transcribed strand and one to three in the non-transcribed strand.

GENE EXPRESSION

ORF2 and ORF3 are expressed by leaky scanning of genomic RNA.

Enzymes: Aspartic protease, Reverse-transcriptase, RNAse H

REPLICATION

CYTOPLASMIC / NUCLEAR

  1. Attachment of viral proteins to host receptors mediates entry into the host cell.
  2. The viral dsDNA is released into the nucleus.
  3. Transcribed by host RNA polymerase II.
  4. mRNA translation produces viral proteins.
  5. Genomic RNA is retrotranscribed into new dsDNA genomes in the cytoplasm.
  6. Genomes are encapsidated by the capsid protein and form new virions.
  7. The virion infects either a new cell by plasmodesmata movement, or by insect vector uptake.

Matching UniProtKB/Swiss-Prot entries

(all links/actions below point to uniprot.org website)

4 entries grouped by strain (browse by keywords)

4 entries

Rice tungro bacilliform virus (isolate Philippines) (RTBV) reference strain

Select_allDeselect_all
P2_RTBVP Protein P2 (ORF 2) (P12)
P4_RTBVP Protein P4 (ORF 4) (P46)
POL_RTBVP Polyprotein P3 (P194 protein) [Cleaved into: Putative movement protein (MP); Capsid protein (Coat ...
P1_RTBVP Protein P1 (ORF 1) (P24)