1PRW

Crystal structure of bovine brain Ca++ calmodulin in a compact form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

A closed compact structure of native ca(2+)-calmodulin.

Fallon, J.L.Quiocho, F.A.

(2003) Structure 11: 1303-1307

  • DOI: 10.1016/j.str.2003.09.004
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Calmodulin has been a subject of intense scrutiny since its discovery because of its unusual properties in regulating the functions of about 100 diverse target enzymes and structural proteins. The original and to date only crystal conformation of nat ...

    Calmodulin has been a subject of intense scrutiny since its discovery because of its unusual properties in regulating the functions of about 100 diverse target enzymes and structural proteins. The original and to date only crystal conformation of native eukaryotic Ca(2+)-calmodulin (Ca(2+)-CaM) is a very extended molecule with two widely separated globular domains linked by an exposed long helix. Here we report the 1.7 A X-ray structure of a new native Ca(2+)-CaM that is in a compact ellipsoidal conformation and shows a sharp bend in the linker helix and a more contracted N-terminal domain. This conformation may offer advantages for recognition of kinase-type calmodulin targets or small organic molecule drugs.


    Related Citations: 
    • Man bites dog
      Meador, W.E., Quiocho, F.A.
      (2002) Nat Struct Biol 9: 156
    • X-ray analysis reveals conformational adaptation of the linker in functional calmodulin mutants
      Meador, W.E., George, S.E., Means, A.R., Quiocho, F.A.
      (1995) Nat Struct Biol 2: 943
    • Modulation of calmodulin plasticity in molecular recognition on the basis of x-ray structures
      Meador, W.E., Means, A.R., Quiocho, F.A.
      (1993) Science 262: 1718
    • Target enzyme recognition by calmodulin: 2.4 A structure of a calmodulin-peptide complex
      Meador, W.E., Means, A.R., Quiocho, F.A.
      (1992) Science 257: 1251
    • Calmodulin structure refined at 1.7 A resolution
      Chattopadhyaya, R., Meador, W.E., Means, A.R., Quiocho, F.A.
      (1992) J Mol Biol 228: 1177

    Organizational Affiliation

    Howard Hughes Medical Institute, Baylor College of Medicine, Houston, TX 77030, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Calmodulin
A
149Bos taurusMutation(s): 1 
Gene Names: CALMCAM
Find proteins for P62157 (Bos taurus)
Go to UniProtKB:  P62157
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
M3L
Query on M3L
AL-PEPTIDE LINKINGC9 H21 N2 O2LYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.186 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.32α = 90
b = 35.75β = 117.19
c = 68.03γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
PHASESphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-10-10
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance