3MI7

An Enhanced Repressor of Human Papillomavirus E2 Protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.188 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Design and characterization of an enhanced repressor of human papillomavirus E2 protein.

Bose, K.Meinke, G.Bohm, A.Baleja, J.D.

(2011) FASEB J 25: 2354-2361

  • DOI: https://doi.org/10.1096/fj.10-176461
  • Primary Citation of Related Structures:  
    3MI7

  • PubMed Abstract: 

    Papillomaviruses are causative agents of cervical and anogenital cancers. The viral E2 protein mediates viral DNA replication and transactivation of viral oncogenes and thus represents a specific target for therapeutic intervention. Short forms of E2, E2R, contain only the C-terminal dimerization domain, and repress the normal function of E2 due to formation of an inactive heterodimer. Using structure-guided design, we replaced conserved residues at the dimer interface to design a heterodimer with increased stability. One E2R mutant in which histidine was replaced by a glutamate residue showed preferential heterodimer formation in vitro, as well as an increase in plasticity at the interface, as a result of histidine-glutamate pair formation, as observed spectroscopically and in the crystal structure, determined to 2.2-Å resolution. In addition, the enhanced E2R showed greater repression of transcription from E2-responsive reporter plasmids in mammalian cell culture. Recent advances in protein delivery into the cell raise the possibility of using exogenously added proteins as therapeutic agents. More generally, this approach may be used to target the subunit interfaces of any multisubunit protein having a similar mechanism of action.


  • Organizational Affiliation

    Department of Biochemistry, Tufts University School of Medicine, 136 Harrison Ave., Boston, MA 02111, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Regulatory protein E2A [auth X]85Human papillomavirus 16Mutation(s): 2 
Gene Names: E2
UniProt
Find proteins for P03120 (Human papillomavirus type 16)
Explore P03120 
Go to UniProtKB:  P03120
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03120
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.188 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.86α = 90
b = 43.099β = 120.53
c = 45.666γ = 90
Software Package:
Software NamePurpose
CrysalisProdata collection
AMoREphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-04-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-11-08
    Changes: Advisory, Refinement description
  • Version 1.3: 2021-10-06
    Changes: Advisory, Database references, Derived calculations
  • Version 1.4: 2023-09-06
    Changes: Data collection, Refinement description