Biological Assembly 1  

 3D View: Structure

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

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

Macromolecule Content

• Total Structure Weight: 53.27 kDa 
• Atom Count: 3437 
• Residue Count: 421 
• Unique protein chains: 1

1O7F

CRYSTAL STRUCTURE OF THE REGULATORY DOMAIN OF EPAC2

• DOI: 10.2210/pdb1O7F/pdb

• Classification: REGULATION
• Organism(s): Mus musculus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2002-11-04 Released: 2002-11-11 
• Deposition Author(s): Rehmann, H., Prakash, B., Wolf, E., Rueppel, A., De Rooij, J., Bos, J.L., Wittinghofer, A.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.278 
• R-Value Work: 0.244 
• R-Value Observed: 0.244 

Literature

Structure and Regulation of the Camp-Binding Domains of Epac2

Rehmann, H., Prakash, B., Wolf, E., Rueppel, A., De Rooij, J., Bos, J.L., Wittinghofer, A.

(2002) Nat Struct Biol 10: 26

• PubMed: 12469113 
• DOI: 10.1038/nsb878
• Primary Citation of Related Structures:  
  1O7F


• PubMed Abstract: 
  

Cyclic adenosine monophosphate (cAMP) is a universal second messenger that, in eukaryotes, was believed to act only on cAMP-dependent protein kinase A (PKA) and cyclic nucleotide-regulated ion channels. Recently, guanine nucleotide exchange factors specific for the small GTP-binding proteins Rap1 and Rap2 (Epacs) were described, which are also activated directly by cAMP. Here, we have determined the three-dimensional structure of the regulatory domain of Epac2, which consists of two cyclic nucleotide monophosphate (cNMP)-binding domains and one DEP (Dishevelled, Egl, Pleckstrin) domain. This is the first structure of a cNMP-binding domain in the absence of ligand, and comparison with previous structures, sequence alignment and biochemical experiments allow us to delineate a mechanism for cyclic nucleotide-mediated conformational change and activation that is most likely conserved for all cNMP-regulated proteins. We identify a hinge region that couples cAMP binding to a conformational change of the C-terminal regions. Mutations in the hinge of Epac can uncouple cAMP binding from its exchange activity.

---

Organizational Affiliation: 

Max-Planck Institut für Molekulare Physiologie, Otto Hahn Strasse 11, D-44227, Dortmund, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CAMP-DEPENDENT RAP1 GUANINE-NUCLEOTIDE EXCHANGE FACTOR	A	469	Mus musculus	Mutation(s): 0  Gene Names: Rapgef4, Cgef2, Epac2
Find proteins for Q9EQZ6 (Mus musculus) Explore Q9EQZ6  Go to UniProtKB:  Q9EQZ6

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.278 
• R-Value Work: 0.244 
• R-Value Observed: 0.244 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 67.429	α = 90
b = 96.062	β = 90
c = 103.776	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
XDS	data reduction
XSCALE	data scaling
SOLVE	phasing
SnB	phasing
SHARP	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-11-04 
• Released Date: 2002-11-11 
Deposition Author(s): Rehmann, H., Prakash, B., Wolf, E., Rueppel, A., De Rooij, J., Bos, J.L., Wittinghofer, A.

Revision History 

• Version 1.0: 2002-11-11
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance