Deltapapillomavirus (taxid:325454)



Non-enveloped. Small, icosahedral, about 60 nm in size. A single molecule of circular dsDNA is contained within the capsid, which is composed of 72 pentamers arranged on a T = 7 lattice.



Circular dsDNA, about 8 kb in size, associated with cellular histones.
On rare non-specific recombination, the viral genome can be integrated in host chromosome. This inactivates the integrated virus but can gives the host cell a replicative advantage sometimes leading to malignant tumours.


Only one strand of the genome is transcribed and yield two classes of proteins expressed by alternative splicing :
a) Early Proteins: non-structural regulatory proteins (E1-E7).
b) Late Proteins: the structural proteins L1 and L2.



Replication is divided in two distinct steps that are linked to the differentiation state of the host epithelial cell:

a) The plasmid replication takes place in the basal squamous epithelial cells. It corresponds to viral DNA replication in synchrony with the host cell chromosome in order to ensures an average of one viral genome per basal cell.

  1. Attachment of the viral proteins to host receptors mediates endocytosis into vesicles in the basal squamous epithelial cell.
  2. Transport to the nucleus and uncoating of the viral DNA.
  3. Early-region transcription and translation of the early proteins.
  4. Steady-state viral DNA nuclear replication. Requires the origin of DNA replication in cis and the viral E1 and E2 proteins in trans.

b) The vegetative replication, which occurs in differentiated keratinocytes. In these cells, which no longer undergo cellular DNA synthesis, there is a burst of viral DNA synthesis with active production of virions.

  1. Vegetative viral DNA synthesis.
  2. Transcription of the late region.
  3. Capsid proteins L1 and L2 synthesis.
  4. Nuclear capsid assembly and release of viruses.

Matching UniProtKB/Swiss-Prot entries

(all links/actions below point to website)

35 entries grouped by strain

8 entries

Odocoileus virginianus papillomavirus 1 (DPV) (Deer papillomavirus) reference strain

VE1_OVPVD Replication protein E1 (EC (ATP-dependent helicase E1)
VL2_OVPVD Minor capsid protein L2
VE2_OVPVD Regulatory protein E2
VE6_OVPVD Protein E6
VE7_OVPVD Protein E7
VL1_OVPVD Major capsid protein L1
VL3_OVPVD Probable protein L3
VE4_OVPVD Probable protein E4

7 entries

European elk papillomavirus (EEPV) reference strain

VE1_PAPVE Replication protein E1 (EC (ATP-dependent helicase E1)
VL2_PAPVE Minor capsid protein L2
VE2_PAPVE Regulatory protein E2
VE6_PAPVE Protein E6
VE7_PAPVE Protein E7
VL1_PAPVE Major capsid protein L1
VE5_PAPVE Protein E5

10 entries

Bos taurus papillomavirus 2 (Bovine papillomavirus 2)

VE1_BPV2 Replication protein E1 (EC (ATP-dependent helicase E1)
VL2_BPV2 Minor capsid protein L2
VE6_BPV2 Protein E6
VE7_BPV2 Protein E7
VL1_BPV2 Major capsid protein L1
VE5_BPV2 Protein E5
VE2_BPV2 Regulatory protein E2
VE4_BPV2 Probable protein E4
VE3_BPV2 Probable protein E3
VE8_BPV2 Uncharacterized protein E8

9 entries

Bovine papillomavirus type 1

VE1_BPV1 Replication protein E1 (EC (ATP-dependent helicase E1)
VE2_BPV1 Regulatory protein E2
VL2_BPV1 Minor capsid protein L2
VE6_BPV1 Protein E6
VE7_BPV1 Protein E7
VE5_BPV1 Protein E5
VL1_BPV1 Major capsid protein L1
VE4_BPV1 Protein E4
VE8E2_BPV1 Protein E8^E2C

1 entry

Reindeer papillomavirus (RPV)

VE5_PAPVR Protein E5
These structures were created with the help of Colabfold by Jason Nomburg, Nathan Price and Jennifer Doudna (ModelArchive).

Bos taurus papillomavirus 13 taxid:1887213

Protein ModelArchive
E4 ma-jd-viral-65364
E5 (E5 protein) ma-jd-viral-65546
Major capsid protein L1 ma-jd-viral-67230
Minor capsid protein L2 ma-jd-viral-44921
Protein E6 ma-jd-viral-00852
Protein E7 ma-jd-viral-13638
Regulatory protein E2 ma-jd-viral-61087
Replication protein E1 (EC (ATP-dependent helicase E1) ma-jd-viral-21324

Camelus dromedarius papillomavirus 1 taxid:996650

Protein ModelArchive
E1^E4 ma-jd-viral-37927
E7 ma-jd-viral-13635
Major capsid protein L1 ma-jd-viral-67303
Minor capsid protein L2 ma-jd-viral-44986
Protein E6 ma-jd-viral-00870
Regulatory protein E2 ma-jd-viral-61139
Replication protein E1 (EC (ATP-dependent helicase E1) ma-jd-viral-21336

Camelus dromedarius papillomavirus 2 taxid:996651

Protein ModelArchive
E1^E4 ma-jd-viral-37926
E7 ma-jd-viral-13640
Major capsid protein L1 ma-jd-viral-67347
Minor capsid protein L2 ma-jd-viral-44997
Protein E6 ma-jd-viral-00860
Regulatory protein E2 ma-jd-viral-61057
Replication protein E1 (EC (ATP-dependent helicase E1) ma-jd-viral-21308

Capreolus capreolus papillomavirus 1 taxid:470214

Protein ModelArchive
E4 ma-jd-viral-65363
E5 ma-jd-viral-65547
Major capsid protein L1 ma-jd-viral-67237
Minor capsid protein L2 ma-jd-viral-44919
Protein E6 ma-jd-viral-00844
Protein E7 ma-jd-viral-13637
Regulatory protein E2 ma-jd-viral-61146
Replication protein E1 (EC (ATP-dependent helicase E1) ma-jd-viral-21283