2K0F

Calmodulin complexed with calmodulin-binding peptide from smooth muscle myosin light chain kinase


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 160 
  • Conformers Submitted: 160 
  • Selection Criteria: all calculated structures submitted 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A coupled equilibrium shift mechanism in calmodulin-mediated signal transduction

Gsponer, J.Christodoulou, J.Cavalli, A.Bui, J.M.Richter, B.Dobson, C.M.Vendruscolo, M.

(2008) Structure 16: 736-746

  • DOI: 10.1016/j.str.2008.02.017
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • We used nuclear magnetic resonance data to determine ensembles of conformations representing the structure and dynamics of calmodulin (CaM) in the calcium-bound state (Ca(2+)-CaM) and in the state bound to myosin light chain kinase (CaM-MLCK). These ...

    We used nuclear magnetic resonance data to determine ensembles of conformations representing the structure and dynamics of calmodulin (CaM) in the calcium-bound state (Ca(2+)-CaM) and in the state bound to myosin light chain kinase (CaM-MLCK). These ensembles reveal that the Ca(2+)-CaM state includes a range of structures similar to those present when CaM is bound to MLCK. Detailed analysis of the ensembles demonstrates that correlated motions within the Ca(2+)-CaM state direct the structural fluctuations toward complex-like substates. This phenomenon enables initial ligation of MLCK at the C-terminal domain of CaM and induces a population shift among the substates accessible to the N-terminal domain, thus giving rise to the cooperativity associated with binding. Based on these results and the combination of modern free energy landscape theory with classical allostery models, we suggest that a coupled equilibrium shift mechanism controls the efficient binding of CaM to a wide range of ligands.


    Organizational Affiliation

    Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
calmodulin
A
148Homo sapiensMutation(s): 0 
Gene Names: CALM2 (CAM2, CAMB)
Find proteins for P0DP24 (Homo sapiens)
Go to Gene View: CALM2
Go to UniProtKB:  P0DP24
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
19-mer peptide from Myosin light chain kinase
B
19Homo sapiensMutation(s): 1 
Gene Names: MYLK (MLCK, MLCK1, MYLK1)
EC: 2.7.11.18
Find proteins for Q15746 (Homo sapiens)
Go to Gene View: MYLK
Go to UniProtKB:  Q15746
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 160 
  • Conformers Submitted: 160 
  • Selection Criteria: all calculated structures submitted 
  • Olderado: 2K0F Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-06-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance