2JEX

Transcription activator structure reveals redox control of a replication initiation reaction


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.211 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

Transcription Activator Structure Reveals Redox Control of a Replication Initiation Reaction.

Sanders, C.M.Sizov, D.Seavers, P.R.Ortiz-Lombardia, M.Antson, A.A.

(2007) Nucleic Acids Res 35: 3504

  • DOI: https://doi.org/10.1093/nar/gkm166
  • Primary Citation of Related Structures:  
    2JEU, 2JEX

  • PubMed Abstract: 

    Redox changes are one of the factors that influence cell-cycle progression and that control the processes of cellular proliferation, differentiation, senescence and apoptosis. Proteins regulated through redox-sensitive cysteines have been characterized but specific 'sulphydryl switches' in replication proteins remain to be identified. In bovine papillomavirus type-1, DNA replication begins when the viral transcription factor E2 recruits the viral initiator protein E1 to the origin of DNA replication (ori). Here we show that a novel dimerization interface in the E2 transcription activation domain is stabilized by a disulphide bond. Oxidative cross-linking via Cys57 sequesters the interaction surface between E1 and E2, preventing pre-initiation and replication initiation complex formation. Our data demonstrate that as well as a mechanism for regulating DNA binding, redox reactions can control replication by modulating the tertiary structure of critical protein factors using a specific redox sensor.


  • Organizational Affiliation

    Institute for Cancer Studies, University of Sheffield, Beech Hill Rd, Sheffield, S10 2RX, UK. c.m.sanders@sheffield.ac.uk


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
REGULATORY PROTEIN E2209Deltapapillomavirus 4Mutation(s): 1 
UniProt
Find proteins for P03122 (Bovine papillomavirus type 1)
Explore P03122 
Go to UniProtKB:  P03122
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03122
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.211 
  • Space Group: P 32
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.549α = 90
b = 60.549β = 90
c = 89.41γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-05-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2019-05-08
    Changes: Data collection, Experimental preparation, Other
  • Version 1.3: 2023-12-13
    Changes: Data collection, Database references, Other, Refinement description