4ZP3

AKAP18:PKA-RIIalpha structure reveals crucial anchor points for recognition of regulatory subunits of PKA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.63 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.225 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

AKAP18:PKA-RII alpha structure reveals crucial anchor points for recognition of regulatory subunits of PKA.

Gotz, F.Roske, Y.Schulz, M.S.Autenrieth, K.Bertinetti, D.Faelber, K.Zuhlke, K.Kreuchwig, A.Kennedy, E.J.Krause, G.Daumke, O.Herberg, F.W.Heinemann, U.Klussmann, E.

(2016) Biochem J 473: 1881-1894

  • DOI: 10.1042/BCJ20160242
  • Primary Citation of Related Structures:  
    4ZP3

  • PubMed Abstract: 
  • A-kinase anchoring proteins (AKAPs) interact with the dimerization/docking (D/D) domains of regulatory subunits of the ubiquitous protein kinase A (PKA). AKAPs tether PKA to defined cellular compartments establishing distinct pools to increase the specif ...

    A-kinase anchoring proteins (AKAPs) interact with the dimerization/docking (D/D) domains of regulatory subunits of the ubiquitous protein kinase A (PKA). AKAPs tether PKA to defined cellular compartments establishing distinct pools to increase the specificity of PKA signalling. Here, we elucidated the structure of an extended PKA-binding domain of AKAP18β bound to the D/D domain of the regulatory RIIα subunits of PKA. We identified three hydrophilic anchor points in AKAP18β outside the core PKA-binding domain, which mediate contacts with the D/D domain. Such anchor points are conserved within AKAPs that bind regulatory RII subunits of PKA. We derived a different set of anchor points in AKAPs binding regulatory RI subunits of PKA. In vitro and cell-based experiments confirm the relevance of these sites for the interaction of RII subunits with AKAP18 and of RI subunits with the RI-specific smAKAP. Thus we report a novel mechanism governing interactions of AKAPs with PKA. The sequence specificity of each AKAP around the anchor points and the requirement of these points for the tight binding of PKA allow the development of selective inhibitors to unequivocally ascribe cellular functions to the AKAP18-PKA and other AKAP-PKA interactions.


    Organizational Affiliation

    Max Delbrück Centre for Molecular Medicine Berlin in the Helmholtz Association (MDC), Robert-Rössle-Straße 10, 13125 Berlin, Germany DZHK, German Centre for Cardiovascular Research, Oudenarder Straße 16,13347 Berlin, Germany enno.klussmann@mdc-berlin.de.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
cAMP-dependent protein kinase type II-alpha regulatory subunitABCDEFGHABCDEFGHIJKL
43Homo sapiensMutation(s): 0 
Gene Names: PRKAR2APKR2PRKAR2
Find proteins for P13861 (Homo sapiens)
Explore P13861 
Go to UniProtKB:  P13861
NIH Common Fund Data Resources
PHAROS:  P13861
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
A-kinase anchor protein 7 isoforms alpha and beta MNOPQR40Homo sapiensMutation(s): 0 
Gene Names: AKAP7AKAP15AKAP18
Find proteins for Q9P0M2 (Homo sapiens)
Explore Q9P0M2 
Go to UniProtKB:  Q9P0M2
NIH Common Fund Data Resources
PHAROS:  Q9P0M2
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.63 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.225 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.922α = 90
b = 120.988β = 93.01
c = 57.123γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-05-04
    Type: Initial release
  • Version 1.1: 2016-05-11
    Changes: Structure summary
  • Version 1.2: 2016-07-06
    Changes: Database references