5TP6

Solution structure of the CaM34 with the iNOS CaM binding domain peptide


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural Consequences of Calmodulin EF Hand Mutations.

Piazza, M.Taiakina, V.Dieckmann, T.Guillemette, J.G.

(2017) Biochemistry 56: 944-956

  • DOI: https://doi.org/10.1021/acs.biochem.6b01296
  • Primary Citation of Related Structures:  
    5TP5, 5TP6

  • PubMed Abstract: 

    Calmodulin (CaM) is a cytosolic Ca 2+ -binding protein that serves as a control element for many enzymes. It consists of two globular domains, each containing two EF hand pairs capable of binding Ca 2+ , joined by a flexible central linker region. CaM is able to bind and activate its target proteins in the Ca 2+ -replete and Ca 2+ -deplete forms. To study the Ca 2+ -dependent/independent properties of binding and activation of target proteins by CaM, CaM constructs with Ca 2+ -binding disrupting mutations of Asp to Ala at position one of each EF hand have been used. These CaM mutant proteins are deficient in binding Ca 2+ in either the N-lobe EF hands (CaM 12 ), C-lobe EF hands (CaM 34 ), or all four EF hands (CaM 1234 ). To investigate potential structural changes these mutations may cause, we performed detailed NMR studies of CaM 12 , CaM 34 , and CaM 1234 including determining the solution structure of CaM 1234 . We then investigated if these CaM mutants affected the interaction of CaM with a target protein known to interact with apoCaM by determining the solution structure of CaM 34 bound to the iNOS CaM binding domain peptide. The structures provide direct structural evidence of changes that are present in these Ca 2+ -deficient CaM mutants and show these mutations increase the hydrophobic exposed surface and decrease the electronegative surface potential throughout each lobe of CaM. These Ca 2+ -deficient CaM mutants may not be a true representation of apoCaM and may not allow for native-like interactions of apoCaM with its target proteins.


  • Organizational Affiliation

    Department of Chemistry, University of Waterloo , Waterloo, Ontario N2L 3G1, Canada.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Calmodulin148Homo sapiensMutation(s): 2 
Gene Names: 
CALM1CALMCAMCAM1CALM2CAM2CAMBCALM3CALML2CAM3...
CALM1CALMCAMCAM1CALM2CAM2CAMBCALM3CALML2CAM3CAMCCAMIII

UniProt & NIH Common Fund Data Resources
Find proteins for P0DP23 (Homo sapiens)
Explore P0DP23 
Go to UniProtKB:  P0DP23
PHAROS:  P0DP23
GTEx:  ENSG00000198668 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DP23
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Nitric oxide synthase, inducible29Homo sapiensMutation(s): 0 
Gene Names: NOS2NOS2A
EC: 1.14.13.39
UniProt & NIH Common Fund Data Resources
Find proteins for P35228 (Homo sapiens)
Explore P35228 
Go to UniProtKB:  P35228
PHAROS:  P35228
GTEx:  ENSG00000007171 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP35228
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Natural Sciences and Engineering Research Council (NSERC, Canada)Canada183521

Revision History  (Full details and data files)

  • Version 1.0: 2017-09-27
    Type: Initial release
  • Version 1.1: 2020-01-08
    Changes: Author supporting evidence
  • Version 1.2: 2024-05-01
    Changes: Data collection, Database references