1DEG

THE LINKER OF DES-GLU84 CALMODULIN IS BENT AS SEEN IN THE CRYSTAL STRUCTURE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Work: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The linker of des-Glu84-calmodulin is bent.

Raghunathan, S.Chandross, R.J.Cheng, B.P.Persechini, A.Sobottka, S.E.Kretsinger, R.H.

(1993) Proc.Natl.Acad.Sci.Usa 90: 6869-6873


  • PubMed Abstract: 
  • The crystal structure of a mutant calmodulin (CaM) lacking Glu-84 has been refined to R = 0.23 using data measured to 2.9-A resolution. In native CaM the central helix is fully extended, and the molecule is dumbbell shaped. In contrast, the deletion ...

    The crystal structure of a mutant calmodulin (CaM) lacking Glu-84 has been refined to R = 0.23 using data measured to 2.9-A resolution. In native CaM the central helix is fully extended, and the molecule is dumbbell shaped. In contrast, the deletion of Glu-84 causes a bend of 95 degrees in the linker region of the central helix at Ile-85. However, EF-hand domains 1 and 2 (lobe 1,2) do not touch lobe 3,4. The length, by alpha-carbon separation, of des-Glu84-CaM is 56 A; that of native CaM is 64 A. The shape of des-Glu84-CaM is similar to that of native CaM, as it is bound to the target peptide of myosin light-chain kinase. This result supports the proposal that the linker region of the central helix of CaM functions as a flexible tether.


    Related Citations: 
    • Calmodulins with Deletions in the Central Helix Functionally Replace the Native Protein in Yeast Cells
      Persechini, A.,Kretsinger, R.H.,Davis, T.N.
      (1991) Proc.Natl.Acad.Sci.USA 88: 449
    • Toward a Model of the Calmodulin-Myosin Light Chain Kinase Complex: Implications of Calmodulin Function
      Persechini, A.,Kretsinger, R.H.
      (1988) J.CARDIOVASC.PHARMACOL. 12: 1
    • The Central Helix of Calmodulin Functions as a Flexible Tether
      Persechini, A.,Kretsinger, R.H.
      (1988) J.Biol.Chem. 263: 12175
    • Small-Angle X-Ray Scattering Studies of Calmodulin Mutants with Deletions in the Linker Region of the Central Helix Indicate that the Linker Region Retains a Predominantly A-Helical Conformation
      Kataoka, M.,Head, J.F.,Persechini, A.,Kretsinger, R.H.,Engelman, D.M.
      (1991) Biochemistry 30: 1188
    • The Effects of Deletions in the Central Helix of Calmodulin on Enzyme Activation and Peptide Binding
      Persechini, A.,Blumenthal, D.K.,Jarrett, H.W.,Klee, C.B.,Hardy, D.O.,Kretsinger, R.H.
      (1989) J.Biol.Chem. 264: 8052


    Organizational Affiliation

    Department of Biology, University of Virginia, Charlottesville 22901.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CALMODULIN
A
142Bos taurusGene Names: CALM (CAM)
Find proteins for P62157 (Bos taurus)
Go to UniProtKB:  P62157
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: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Work: 0.230 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 45.300α = 90.00
b = 49.900β = 90.00
c = 62.400γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORphasing
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-05-31
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance