Conformational dynamics of exchange protein directly activated by cAMP

Experimental Data Snapshot

  • Resolution: 2.60 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.222 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Structural analyses of a constitutively active mutant of exchange protein directly activated by cAMP.

White, M.A.Li, S.Tsalkova, T.Mei, F.C.Liu, T.Woods, V.L.Cheng, X.

(2012) PLoS One 7: e49932-e49932

  • DOI: https://doi.org/10.1371/journal.pone.0049932
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Exchange proteins directly activated by cAMP (EPACs) are important allosteric regulators of cAMP-mediated signal transduction pathways. To understand the molecular mechanism of EPAC activation, we have combined site-directed mutagenesis, X-ray crystallography, and peptide amide hydrogen/deuterium exchange mass spectrometry (DXMS) to probe the structural and conformational dynamics of EPAC2-F435G, a constitutively active EPAC2 mutant. Our study demonstrates that conformational dynamics plays a critical role in cAMP-induced EPAC activation. A glycine mutation at 435 position shifts the equilibrium of conformational dynamics towards the extended active conformation.

  • Organizational Affiliation

    Sealy Center for Structural Biology and Molecular Biophysics, The University of Texas Medical Branch, Galveston, Texas, United States of America.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Rap guanine nucleotide exchange factor 4999Mus musculusMutation(s): 1 
Gene Names: Rapgef4Cgef2Epac2
UniProt & NIH Common Fund Data Resources
Find proteins for Q9EQZ6 (Mus musculus)
Explore Q9EQZ6 
Go to UniProtKB:  Q9EQZ6
IMPC:  MGI:1917723
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9EQZ6
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.60 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.222 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.72α = 90
b = 95.35β = 90
c = 181.84γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
DENZOdata reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-10-03
    Type: Initial release
  • Version 1.1: 2012-12-12
    Changes: Database references
  • Version 1.2: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description