Crystal Structure of the Auto-Inhibited Kinase Domain of Calcium/Calmodulin Activated Kinase II

Experimental Data Snapshot

  • Resolution: 1.80 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.216 

Starting Model: experimental
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Structure of the Autoinhibited Kinase Domain of CaMKII and SAXS Analysis of the Holoenzyme

Rosenberg, O.S.Deindl, S.Sung, R.-J.Nairn, A.C.Kuriyan, J.

(2005) Cell 123: 849-860

  • DOI: https://doi.org/10.1016/j.cell.2005.10.029
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Ca2+/calmodulin-dependent protein kinase-II (CaMKII) is unique among protein kinases for its dodecameric assembly and its complex response to Ca2+. The crystal structure of the autoinhibited kinase domain of CaMKII, determined at 1.8 A resolution, reveals an unexpected dimeric organization in which the calmodulin-responsive regulatory segments form a coiled-coil strut that blocks peptide and ATP binding to the otherwise intrinsically active kinase domains. A threonine residue in the regulatory segment, which when phosphorylated renders CaMKII calmodulin independent, is held apart from the catalytic sites by the organization of the dimer. This ensures a strict Ca2+ dependence for initial activation. The structure of the kinase dimer, when combined with small-angle X-ray scattering data for the holoenzyme, suggests that inactive CaMKII forms tightly packed autoinhibited assemblies that convert upon activation into clusters of loosely tethered and independent kinase domains.

  • Organizational Affiliation

    Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Hypothetical protein K11E8.1d
A, B
362Caenorhabditis elegansMutation(s): 1 
Gene Names: Ca2+/calmodulin-dependent protein kinase
Find proteins for O62305 (Caenorhabditis elegans)
Explore O62305 
Go to UniProtKB:  O62305
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO62305
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.80 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.216 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.121α = 90
b = 77.104β = 96.74
c = 119.52γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
HKL-2000data reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-12-13
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-10-20
    Changes: Database references
  • Version 1.4: 2023-08-23
    Changes: Data collection, Refinement description