2JC2

The crystal structure of the natural F112L human sorcin mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.252 

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

  • 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 descri ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SORCIN
A, B, C, D
198Homo sapiensMutation(s): 1 
Gene Names: SRI
Find proteins for P30626 (Homo sapiens)
Go to Gene View: SRI
Go to UniProtKB:  P30626
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C, D
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.252 
  • Space Group: P 65
Unit Cell:
Length (Å)Angle (°)
a = 64.385α = 90.00
b = 64.385β = 90.00
c = 314.837γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
MOLREPphasing
REFMACrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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