2JEU | pdb_00002jeu

Transcription activator structure reveals redox control of a replication initiation reaction

• PDB DOI: https://doi.org/10.2210/pdb2JEU/pdb

• Classification: TRANSCRIPTION
• Organism(s): Deltapapillomavirus 4
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2007-01-23 Released: 2007-05-15 
• Deposition Author(s): Sanders, C.M., Sizov, D., Seavers, P.R., Ortiz-Lombardia, M., Antson, A.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 
  0.281 (Depositor) 
• R-Value Work: 
  0.233 (Depositor), 0.234 (DCC) 
• R-Value Observed: 
  0.236 (Depositor) 

Starting Model: experimental

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

• PubMed: 17478495 
• DOI: https://doi.org/10.1093/nar/gkm166
• Primary Citation 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.

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Organizational Affiliation: 
• Institute for Cancer Studies, University of Sheffield, Beech Hill Rd, Sheffield, S10 2RX, UK. [e-mail]

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content 

• Total Structure Weight: 23.91 kDa 
• Atom Count: 1,595 
• Modeled Residue Count: 197 
• Deposited Residue Count: 209 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
REGULATORY PROTEIN E2	A	209	Deltapapillomavirus 4	Mutation(s): 0
UniProt
Find proteins for P03122 (Bovine papillomavirus type 1) Explore P03122  Go to UniProtKB:  P03122

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free:  0.281 (Depositor) 
• R-Value Work:  0.233 (Depositor), 0.234 (DCC) 
• R-Value Observed: 0.236 (Depositor) 

Space Group: P 6₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 61.539	α = 90
b = 61.539	β = 90
c = 236.317	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-05-15 
Deposition Author(s): Sanders, C.M., Sizov, D., Seavers, P.R., Ortiz-Lombardia, M., Antson, A.A.

Revision History  

• 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