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 

wwPDB Validation 3D Report Full Report


This is version 1.1 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: 10.1093/nar/gkm166
  • Primary Citation of Related Structures:  

  • 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 characteriz ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
REGULATORY PROTEIN E2
A
209Bovine papillomavirus type 1Mutation(s): 1 
Gene Names: E2
Find proteins for P03122 (Bovine papillomavirus type 1)
Go to UniProtKB:  P03122
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.210 
  • Space Group: P 32
Unit Cell:
Length (Å)Angle (°)
a = 60.549α = 90.00
b = 60.549β = 90.00
c = 89.410γ = 120.00
Software Package:
Software NamePurpose
MOLREPphasing
SCALEPACKdata scaling
DENZOdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-05-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance