Enveloped, brick-shaped about 300×250x200nm in size. Two distinct infectious virus particles exists: the intracellular mature virus (IMV) and the extracellular enveloped virus (EEV).


Linear, dsDNA genome about 145kb. The linear genome is flanked by inverted terminal repeat (ITR) sequences which are covalently-closed at their extremities.




  1. Attachement of the viral proteins to host glycosaminoglycans (GAGs) mediates endocytosis of the virus into the host cell.
  2. Fusion with the plasma membrane to release the core into the host cytoplasm.
  3. Early phase: early genes are transcribed in the cytoplasm by viral RNA polymerase. Early expression begins at 30 minutes post-infection.
  4. Core is completely uncoated as early expression ends, viral genome is now free in the cytoplasm.
  5. Intermediate phase: Intermediate genes are expressed, triggering genomic DNA replication at approximately 100 minutes post-infection.
  6. Late phase: Late genes are expressed from 140 min to 48 hours post-infection, producing all structural proteins.
  7. Assembly of progeny virions starts in cytoplasmic viral factories, producing an spherical immature particle. This virus particle matures into brick-shaped intracellular mature virion (IMV).
  8. IMV virion can be released upon cell lysis, or can acquire a second double membrane from trans-Golgi and bud as external enveloped virion (EEV).

Host-virus interaction

Adaptive immune response inhibition

The poxviral E3 ubiquitin-protein ligase LAP promotes ubiquitination and subsequent degradation of host MHC-I and CD4 molecules.

Matching UniProtKB/Swiss-Prot entries

19 entries grouped by strain (browse by keywords)

11 entries

Yaba monkey tumor virus (strain VR587) (YMTV) reference strain

Select_all Deselect_all  
A18_YMTV5Transcript termination protein A18 (EC 3.6.4.-)
A28_YMTV5Envelope protein A28 homolog (Protein 118)
DUT_YMTV5Deoxyuridine 5'-triphosphate nucleotidohydrolase (dUTPase) (EC (dUTP ...
ETF1_YMTV5Early transcription factor 70 kDa subunit (EC 3.6.4.-) (ATP-dependent helicase ...
ETF2_YMTV5Early transcription factor 82 kDa subunit (ETF large subunit)
KITH_YMTV5Thymidine kinase (EC
LAP_YMTV5E3 ubiquitin-protein ligase LAP (EC (Leukemia associated protein) ...
MCES_YMTV5mRNA-capping enzyme small subunit (mRNA (guanine-N(7)-)-methyltransferase) (EC ...
NTP1_YMTV5Nucleoside triphosphatase I (EC (NPH-I) (Nucleoside triphosphate ...
PAP1_YMTV5Poly(A) polymerase catalytic subunit (EC (Poly(A) polymerase large ...
VHR2_YMTV5Probable host range protein 2

8 entries

Yaba-like disease virus (YLDV)

Select_all Deselect_all  
A18_YLDVTranscript termination protein A18 (EC 3.6.4.-)
A28_YLDVEnvelope protein A28 homolog (Protein 118)
LAP_YLDVE3 ubiquitin-protein ligase LAP (EC (Leukemia associated protein) ...
MP44_YLDVProbable metalloendopeptidase G1-type (EC 3.4.24.-)
PAP1_YLDVPoly(A) polymerase catalytic subunit (EC (Poly(A) polymerase large ...
RIR2_YLDVRibonucleoside-diphosphate reductase small chain (EC (Ribonucleotide ...
RP07_YLDVDNA-directed RNA polymerase 7 kDa subunit (EC
VHR2_YLDVProbable host range protein 2