5U6Y

Pseudo-atomic model of the CaMKIIa holoenzyme.


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The CaMKII holoenzyme structure in activation-competent conformations.

Myers, J.B.Zaegel, V.Coultrap, S.J.Miller, A.P.Bayer, K.U.Reichow, S.L.

(2017) Nat Commun 8: 15742-15742

  • DOI: 10.1038/ncomms15742

  • PubMed Abstract: 
  • The Ca2+/calmodulin-dependent protein kinase II (CaMKII) assembles into large 12-meric holoenzymes, which is thought to enable regulatory processes required for synaptic plasticity underlying learning, memory and cognition. Here we used single partic ...

    The Ca2+/calmodulin-dependent protein kinase II (CaMKII) assembles into large 12-meric holoenzymes, which is thought to enable regulatory processes required for synaptic plasticity underlying learning, memory and cognition. Here we used single particle electron microscopy (EM) to determine a pseudoatomic model of the CaMKIIα holoenzyme in an extended and activation-competent conformation. The holoenzyme is organized by a rigid central hub complex, while positioning of the kinase domains is highly flexible, revealing dynamic holoenzymes ranging from 15-35 nm in diameter. While most kinase domains are ordered independently, ∼20% appear to form dimers and <3% are consistent with a compact conformation. An additional level of plasticity is revealed by a small fraction of bona-fide 14-mers (<4%) that may enable subunit exchange. Biochemical and cellular FRET studies confirm that the extended state of CaMKIIα resolved by EM is the predominant form of the holoenzyme, even under molecular crowding conditions.


    Organizational Affiliation

    Department of Chemistry, Portland State University, Portland, Oregon 97021, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Calcium/calmodulin-dependent protein kinase type II subunit alpha
A, B, C, D, E, F, G, H, I, J, K, L
461Rattus norvegicusMutation(s): 0 
Gene Names: Camk2a
EC: 2.7.11.17
Find proteins for P11275 (Rattus norvegicus)
Go to UniProtKB:  P11275
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Neurological Disorders and StrokeUnited StatesR01NS081248

Revision History 

  • Version 1.0: 2017-06-21
    Type: Initial release
  • Version 1.1: 2017-09-20
    Type: Author supporting evidence, Data collection
  • Version 1.2: 2017-11-08
    Type: Derived calculations
  • Version 1.3: 2018-07-18
    Type: Data collection