3IM4

Crystal structure of cAMP-dependent Protein Kinase A Regulatory Subunit I alpha in complex with dual-specific A-Kinase Anchoring Protein 2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.285 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of D-AKAP2:PKA RI Complex: Insights into AKAP Specificity and Selectivity

Sarma, G.N.Kinderman, F.S.Kim, C.von Daake, S.Chen, L.Wang, B.C.Taylor, S.S.

(2010) Structure 18: 155-166

  • DOI: 10.1016/j.str.2009.12.012
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • A-kinase anchoring proteins (AKAPs) regulate cyclic AMP-dependent protein kinase (PKA) signaling in space and time. Dual-specific AKAP 2 (D-AKAP2) binds to the dimerization/docking (D/D) domain of both RI and RII regulatory subunits of PKA with high ...

    A-kinase anchoring proteins (AKAPs) regulate cyclic AMP-dependent protein kinase (PKA) signaling in space and time. Dual-specific AKAP 2 (D-AKAP2) binds to the dimerization/docking (D/D) domain of both RI and RII regulatory subunits of PKA with high affinity. Here we have determined the structures of the RIalpha D/D domain alone and in complex with D-AKAP2. The D/D domain presents an extensive surface for binding through a well-formed N-terminal helix, and this surface restricts the diversity of AKAPs that can interact. The structures also underscore the importance of a redox-sensitive disulfide in affecting AKAP binding. An unexpected shift in the helical register of D-AKAP2 compared to the RIIalpha:D-AKAP2 complex structure makes the mode of binding to RIalpha novel. Finally, the comparison allows us to deduce a molecular explanation for the sequence and spatial determinants of AKAP specificity.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, MC 0654, La Jolla, CA 92093, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
cAMP-dependent protein kinase type I-alpha regulatory subunit
A, B
50Bos taurusMutation(s): 0 
Gene Names: PRKAR1A
Find proteins for P00514 (Bos taurus)
Go to Gene View: PRKAR1A
Go to UniProtKB:  P00514
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Dual specificity A kinase-anchoring protein 2
C
45Homo sapiensMutation(s): 0 
Gene Names: AKAP10
Find proteins for O43572 (Homo sapiens)
Go to Gene View: AKAP10
Go to UniProtKB:  O43572
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.285 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.186 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 40.400α = 90.00
b = 56.020β = 90.00
c = 56.990γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
HKL-2000data collection
PHENIXrefinement
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-02-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance