Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 30 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Calcium-induced conformational transition revealed by the solution structure of apo calmodulin.

Zhang, M.Tanaka, T.Ikura, M.

(1995) Nat Struct Biol 2: 758-767

  • DOI: https://doi.org/10.1038/nsb0995-758
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The solution structure of Ca(2+)-free calmodulin has been determined by NMR spectroscopy, and is compared to the previously reported structure of the Ca(2+)-saturated form. The removal of Ca2+ causes the interhelical angles of four EF-hand motifs to increase by 36 degrees-44 degrees. This leads to major changes in surface properties, including the closure of the deep hydrophobic cavity essential for target protein recognition. Concerted movements of helices A and D with respect to B and C, and of helices E and H with respect to F and G are likely responsible for the cooperative Ca(2+)-binding property observed between two adjacent EF-hand sites in the amino- and carboxy-terminal domains.

  • Organizational Affiliation

    Division of Molecular and Structural Biology, Ontario Cancer Institute, University of Toronto, Canada.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CALMODULIN148Xenopus laevisMutation(s): 0 
Find proteins for P0DP33 (Xenopus laevis)
Explore P0DP33 
Go to UniProtKB:  P0DP33
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UniProt GroupP0DP33
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 30 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1996-08-01
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-16
    Changes: Database references, Derived calculations, Other
  • Version 1.4: 2024-05-22
    Changes: Data collection