3KL8

CaMKIINtide Inhibitor Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.37 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.234 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Intersubunit capture of regulatory segments is a component of cooperative CaMKII activation.

Chao, L.H.Pellicena, P.Deindl, S.Barclay, L.A.Schulman, H.Kuriyan, J.

(2010) Nat Struct Mol Biol 17: 264-272

  • DOI: 10.1038/nsmb.1751
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The dodecameric holoenzyme of calcium-calmodulin-dependent protein kinase II (CaMKII) responds to high-frequency Ca(2+) pulses to become Ca(2+) independent. A simple coincidence-detector model for Ca(2+)-frequency dependency assumes noncooperative ac ...

    The dodecameric holoenzyme of calcium-calmodulin-dependent protein kinase II (CaMKII) responds to high-frequency Ca(2+) pulses to become Ca(2+) independent. A simple coincidence-detector model for Ca(2+)-frequency dependency assumes noncooperative activation of kinase domains. We show that activation of CaMKII by Ca(2+)-calmodulin is cooperative, with a Hill coefficient of approximately 3.0, implying sequential kinase-domain activation beyond dimeric units. We present data for a model in which cooperative activation includes the intersubunit 'capture' of regulatory segments. Such a capture interaction is seen in a crystal structure that shows extensive contacts between the regulatory segment of one kinase and the catalytic domain of another. These interactions are mimicked by a natural inhibitor of CaMKII. Our results show that a simple coincidence-detection model cannot be operative and point to the importance of kinetic dissection of the frequency-response mechanism in future experiments.


    Organizational Affiliation

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



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Calcium/calmodulin dependent protein kinase II
A, C, E, G, I
269Caenorhabditis elegansMutation(s): 1 
Gene Names: unc-43K11E8.1K11E8.1d
EC: 2.7.11.17
Find proteins for O62305 (Caenorhabditis elegans)
Go to UniProtKB:  O62305
Protein Feature View
  • Reference Sequence
  • Find similar proteins by: Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Calcium/calmodulin-dependent protein kinase II inhibitor 1
B, D, F, H, J
18Rattus norvegicusMutation(s): 0 
Gene Names: Camk2n1
Find proteins for Q9JI15 (Rattus norvegicus)
Go to UniProtKB:  Q9JI15
Protein Feature View
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.37 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.234 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.41α = 90
b = 83.08β = 101.93
c = 145.13γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-02-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance