1DEG

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Work: 0.230 
  • R-Value Observed: 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 U S A 90: 6869-6873

  • DOI: 10.1073/pnas.90.14.6869
  • Primary Citation of Related Structures:  
    1DEG

  • 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 of Glu-84 causes a bend of 95 degrees in the linker region of the central helix at Ile-85 ...

    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: 
    • 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
    • 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 U S A 88: 449
    • 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
    • The Central Helix of Calmodulin Functions as a Flexible Tether
      Persechini, A., Kretsinger, R.H.
      (1988) J Biol Chem 263: 12175
    • 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

    Organizational Affiliation

    Department of Biology, University of Virginia, Charlottesville 22901.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CALMODULINA142Bos taurusMutation(s): 0 
Gene Names: CALMCAM
UniProt
Find proteins for P62157 (Bos taurus)
Explore P62157 
Go to UniProtKB:  P62157
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Work: 0.230 
  • R-Value Observed: 0.230 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.3α = 90
b = 49.9β = 90
c = 62.4γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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