4GIZ image
Deposition Date 2012-08-09
Release Date 2013-01-23
Last Version Date 2024-02-28
Entry Detail
PDB ID:
4GIZ
Keywords:
VIRAL PROTEIN
Title:
Crystal structure of full-length human papillomavirus oncoprotein E6 in complex with LXXLL peptide of ubiquitin ligase E6AP at 2.55 A resolution
Biological Source:
Source Organism:
Escherichia coli (Taxon ID: 83333)
HOMO SAPIENS (Taxon ID: 9606)
Human papillomavirus type 16 (Taxon ID: 333760)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.55 Å
R-Value Free:
0.19
R-Value Work:
0.16
R-Value Observed:
0.16
Space Group:
P 21 21 21
4GIZ validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Maltose-binding periplasmic protein, UBIQUITIN LIGASE EA6P: chimeric protein
Gene (Uniprot):malE, UBE3A
Mutations:D83A,K84A,K240A,E360A,D364A,K363A
Chain IDs:A, B
Chain Length:382
Number of Molecules:2
Biological Source:Escherichia coli, HOMO SAPIENS
UniProt ID:P0AEX9,Q05086 Pfam ID:PF01547 EC:7.5.2.1
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Protein E6
Gene (Uniprot):E6
Mutations:F47R,C80S,C97S,C111S,C140S
Chain IDs:C, D
Chain Length:142
Number of Molecules:2
Biological Source:Human papillomavirus type 16
UniProt ID:P03126 Pfam ID:PF00518
Ligand Molecules
ZN
Peptide-like Molecules
PRD_900035
Primary Citation
Structural basis for hijacking of cellular LxxLL motifs by papillomavirus E6 oncoproteins.
Science 339 694 698 (2013)
PMID: 23393263 DOI: 10.1126/science.1229934

Abstact

E6 viral oncoproteins are key players in epithelial tumors induced by papillomaviruses in vertebrates, including cervical cancer in humans. E6 proteins target many host proteins by specifically interacting with acidic LxxLL motifs. We solved the crystal structures of bovine (BPV1) and human (HPV16) papillomavirus E6 proteins bound to LxxLL peptides from the focal adhesion protein paxillin and the ubiquitin ligase E6AP, respectively. In both E6 proteins, two zinc domains and a linker helix form a basic-hydrophobic pocket, which captures helical LxxLL motifs in a way compatible with other interaction modes. Mutational inactivation of the LxxLL binding pocket disrupts the oncogenic activities of both E6 proteins. This work reveals the structural basis of both the multifunctionality and the oncogenicity of E6 proteins.

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Disease

Primary Citation of related structures
4GIZ