3J4R

Pseudo-atomic model of the AKAP18-PKA Complex in a linear conformation derived from electron microscopy


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 35 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Intrinsic disorder within an AKAP-protein kinase A complex guides local substrate phosphorylation.

Smith, F.D.Reichow, S.L.Esseltine, J.L.Shi, D.Langeberg, L.K.Scott, J.D.Gonen, T.

(2013) Elife 2: e01319-e01319

  • DOI: 10.7554/eLife.01319
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Anchoring proteins sequester kinases with their substrates to locally disseminate intracellular signals and avert indiscriminate transmission of these responses throughout the cell. Mechanistic understanding of this process is hampered by limited str ...

    Anchoring proteins sequester kinases with their substrates to locally disseminate intracellular signals and avert indiscriminate transmission of these responses throughout the cell. Mechanistic understanding of this process is hampered by limited structural information on these macromolecular complexes. A-kinase anchoring proteins (AKAPs) spatially constrain phosphorylation by cAMP-dependent protein kinases (PKA). Electron microscopy and three-dimensional reconstructions of type-II PKA-AKAP18γ complexes reveal hetero-pentameric assemblies that adopt a range of flexible tripartite configurations. Intrinsically disordered regions within each PKA regulatory subunit impart the molecular plasticity that affords an ∼16 nanometer radius of motion to the associated catalytic subunits. Manipulating flexibility within the PKA holoenzyme augmented basal and cAMP responsive phosphorylation of AKAP-associated substrates. Cell-based analyses suggest that the catalytic subunit remains within type-II PKA-AKAP18γ complexes upon cAMP elevation. We propose that the dynamic movement of kinase sub-structures, in concert with the static AKAP-regulatory subunit interface, generates a solid-state signaling microenvironment for substrate phosphorylation. DOI: http://dx.doi.org/10.7554/eLife.01319.001.


    Organizational Affiliation

    Department of Pharmacology, Howard Hughes Medical Institute, University of Washington, Seattle, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
A-kinase anchor protein 18
A
353Rattus norvegicusMutation(s): 0 
Gene Names: Akap7 (Akap18)
Find proteins for Q6JP77 (Rattus norvegicus)
Go to UniProtKB:  Q6JP77
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
cAMP-dependent protein kinase type II-alpha regulatory subunit
B, C
402Mus musculusMutation(s): 0 
Gene Names: Prkar2a
Find proteins for P12367 (Mus musculus)
Go to UniProtKB:  P12367
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
cAMP-dependent protein kinase catalytic subunit alpha
D, E
351Mus musculusMutation(s): 0 
Gene Names: Prkaca (Pkaca)
EC: 2.7.11.11
Find proteins for P05132 (Mus musculus)
Go to UniProtKB:  P05132
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 35 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-11-13
    Type: Initial release
  • Version 1.1: 2013-11-27
    Type: Database references
  • Version 1.2: 2018-07-18
    Type: Data collection