Enveloped, ovoid virion about 350x250nm in size. Two distinct infectious virus particles exists: the intracellular mature virus (IMV) and the extracellular enveloped virus (EEV).


Linear, dsDNA genome about 225kb. The linear genome is flanked by inverted terminal repeat (ITR) sequences which are covalently-closed at their extremities.
Amsacta moorei entomopoxvirus strain Moyer genome
at Poxvirus Bioinformatics Ressource center




  1. Attachment 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).
  9. Mature virion can be occluded in spheroids comprised of spheroidin protein.

Host-virus interaction

Apoptosis modulation

The Amsacta moorei entomopoxvirus encodes AMV p33, a functional homolog of the baculovirus apoptosis inhibitor p35 . P33 is a direct inhibitor of caspases.

Matching UniProtKB/Swiss-Prot entries

19 entries grouped by strain (browse by keywords)

11 entries

Amsacta moorei entomopoxvirus (AmEPV) reference strain

SPHR_AMEPV Spheroidin
Y014_AMEPV Uncharacterized leucine-rich repeat-containing protein AMV014/Q3
PTPH_AMEPV Putative tyrosine-protein phosphatase AMV078 (EC
I7_AMEPV Core protease I7 homolog (EC 3.4.22.-)
A28_AMEPV Envelope protein A28 homolog (Protein G4R)
KITH_AMEPV Thymidine kinase (EC
NMT_AMEPV Putative glycylpeptide N-tetradecanoyltransferase (EC (Myristoyl-CoA:protein ...
NTP1_AMEPV Nucleoside triphosphatase I (EC (NPH-I) (Nucleoside triphosphate phosphohydrolase I) (NPH ...
V183_AMEPV Uncharacterized protein AMV183/G2R
V185_AMEPV Uncharacterized protein AMV185/G3L
YO17_AMEPV Uncharacterized protein AMV017/Q1

4 entries

Choristoneura biennis entomopoxvirus (CbEPV)

SPIN_CBEPV Spindolin (Spheroidin) (p50)
NTP1_CBEPV Nucleoside triphosphatase I (EC (NPH-I) (Nucleoside triphosphate phosphohydrolase I) (NPH ...
DPOL_CBEPV DNA polymerase (EC
KITH_CBEPV Thymidine kinase (EC

2 entries

Choristoneura fumiferana entomopoxvirus (CfEPV)

KITH_CFEPV Thymidine kinase (EC
NTP1_CFEPV Nucleoside triphosphatase I (EC (NPH-I) (Nucleoside triphosphate phosphohydrolase I) (NPH ...

2 entries

Heliothis armigera entomopoxvirus (HaEPV)

SPIN_HAEPV Spindolin (Fusolin) (p50)
NTP1_HAEPV Nucleoside triphosphatase I (EC (NPH-I) (Nucleoside triphosphate phosphohydrolase I) (NPH ...