2JC2

The crystal structure of the natural F112L human sorcin mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.252 
  • R-Value Observed: 0.254 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Molecular Basis for the Impaired Function of the Natural F112L Sorcin Mutant: X-Ray Crystal Structure, Calcium Affinity, and Interaction with Annexin Vii and the Ryanodine Receptor.

Franceschini, S.Ilari, A.Verzili, D.Zamparelli, C.Antaramian, A.Rueda, A.Valdivia, H.H.Chiancone, E.Colotti, G.

(2008) FASEB J 22: 295

  • DOI: 10.1096/fj.07-8988com
  • Primary Citation of Related Structures:  
    2JC2

  • PubMed Abstract: 
  • The penta-EF hand protein sorcin participates in the modulation of Ca2+-induced calcium-release in the heart through the interaction with several Ca2+ channels such as the ryanodine receptor. The modulating activity is impaired in the recently described natural F112L mutant ...

    The penta-EF hand protein sorcin participates in the modulation of Ca2+-induced calcium-release in the heart through the interaction with several Ca2+ channels such as the ryanodine receptor. The modulating activity is impaired in the recently described natural F112L mutant. The F112 residue is located at the end of the D helix next to Asp113, one of the calcium ligands in the EF3 hand endowed with the highest affinity for the metal. The F112L-sorcin X-ray crystal structure at 2.5 A resolution displays marked alterations in the EF3 hand, where the hydrogen bonding network established by Phe112 is disrupted, and in the EF1 region, which is tilted in both monomers that give rise to the dimer, the stable form of the molecule. In turn, the observed tilt is indicative of an increased flexibility of the N-terminal part of the molecule. The structural alterations result in a 6-fold decrease in calcium affinity with respect to the wild-type protein and to an even larger impairment of the interaction with annexin VII and of the ability of sorcin to interact with and inhibit ryanodine receptors. These results provide a plausible structural and functional framework that helps elucidate the phenotypic alterations of mice overexpressing F112L-sorcin.


    Related Citations: 
    • The Crystal Structure of the Sorcin Calcium Binding Domain Provides a Model of Calcium-Dependent Processes in the Full Length Protein
      Ilari, A., Johnson, K.A., Nastopoulos, V., Verzili, D., Zamparelli, C., Colotti, G., Tsernoglou, D., Chiancone, E.
      (2002) J Mol Biol 317: 447
    • Crystal Structure of Calcium-Free Human Sorcin: A Member of the Penta-EF-Hand Protein Family
      Xie, X., Dwyer, M.D., Swenson, L., Parker, M.H., Botfield, M.C.
      (2001) Protein Sci 10: 2419

    Organizational Affiliation

    CNR Institute of Molecular Biology and Pathology, University Sapienza, P.le A.Moro 5, 00185 Rome, Italy.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SORCINA, B, C, D198Homo sapiensMutation(s): 1 
Gene Names: SRI
Find proteins for P30626 (Homo sapiens)
Explore P30626 
Go to UniProtKB:  P30626
NIH Common Fund Data Resources
PHAROS:  P30626
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.252 
  • R-Value Observed: 0.254 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.385α = 90
b = 64.385β = 90
c = 314.837γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-08-28
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance