Reviewed
Homo Sapiens (Human) [TaxID: 9606]
E4
Protein E4
Human Papillomavirus Type 39
Viruses> DsDNA Viruses> No RNA Stage> Papillomaviridae> Alphapapillomavirus> Alphapapillomavirus 7> Human Papillomavirus Type 39
Not Available
Various pathway(s) in which protein is involved
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MANREVPVTDRYPLLNLLPNYQTPPRPIPPQQPHAPKKQSRRRLESDLDSVQSQSPLSPTECPWTILTTHSTVTVQATTQDGTSVVVTLRL
91
Not Available
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18-01-2017
Inferred from homology
| Amino Acid | Count | % Frequency | Amino Acid | Count | % Frequency |
|---|---|---|---|---|---|
| Alanine (A) | Leucine (L) | ||||
| Arginine (R) | Lysine (K) | ||||
| Asparagine (N) | Methionine (M) | ||||
| Aspartic Acid (D) | Phenylalanine (F) | ||||
| Cysteine (C) | Proline (P) | ||||
| Glutamine (Q) | Serine (S) | ||||
| Glutamic Acid (E) | Threonine (T) | ||||
| Glycine (G) | Tryptophan (W) | ||||
| Histidine (H) | Tyrosine (Y) | ||||
| Isoleucine (I) | Valine (V) |
| % Number of Residues in Helices | % Number of Residues in Strands | % Number of Residues in Coils |
|---|---|---|
Contributes to multiple aspects of the viral life cycle including viral genome amplification, suppression of suprabasal cell differentiation and egress of newly formed virions. Induces host cell cycle arrest at the G2 phase by associating with and preventing the nuclear entry of host CDK1/cyclin B1 complexes. Inhibits cellular DNA replication by preventing loading of host replication licensing proteins MCM2 and MCM7 onto chromatin. Within the cytoplasm, associates with host kinase SRPK1, a splicing factor regulator, and inhibits its activity. Therefore, E4 favors expression of late viral transcripts by inhibiting SRPK1-mediated phosphorylation of host serine-arginine (SR) proteins that have critical roles in mRNA metabolism. Late in the infectious cycle, E4 also acts to diminish the integrity of the keratinocyte by disrupting the keratin cytoskeleton and inducing apoptosis through alteration of mitochondrial function to facilitate egress of the newly formed virions.
Not Available
Host cytoplasm . Host nucleus .
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Predicted/Modelled
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Protein couldn't be modeled using I-Tasser and Raptor X because of length constraints of the software.
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- Million Molecules
Best 20 Hit molecules
Not Available