4F7Z

Conformational dynamics of exchange protein directly activated by cAMP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • 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


Literature

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:  
    4F7Z

  • 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 ...

    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.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence 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
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • 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
PHASERphasing
CNSrefinement
DENZOdata reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



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