4USL

The X-ray structure of calcium bound human sorcin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Basis of Sorcin-Mediated Calcium-Dependent Signal Transduction.

Ilari, A.Fiorillo, A.Poser, E.Lalioti, V.S.Sundell, G.N.Ivarsson, Y.Genovese, I.Colotti, G.

(2015) Sci.Rep. 5: 16828

  • DOI: 10.1038/srep16828
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Sorcin is an essential penta-EF hand calcium binding protein, able to confer the multi-drug resistance phenotype to drug-sensitive cancer cells and to reduce Endoplasmic Reticulum stress and cell death. Sorcin silencing blocks cell cycle progression ...

    Sorcin is an essential penta-EF hand calcium binding protein, able to confer the multi-drug resistance phenotype to drug-sensitive cancer cells and to reduce Endoplasmic Reticulum stress and cell death. Sorcin silencing blocks cell cycle progression in mitosis and induces cell death by triggering apoptosis. Sorcin participates in the modulation of calcium homeostasis and in calcium-dependent cell signalling in normal and cancer cells. The molecular basis of Sorcin action is yet unknown. The X-ray structures of Sorcin in the apo (apoSor) and in calcium bound form (CaSor) reveal the structural basis of Sorcin action: calcium binding to the EF1-3 hands promotes a large conformational change, involving a movement of the long D-helix joining the EF1-EF2 sub-domain to EF3 and the opening of EF1. This movement promotes the exposure of a hydrophobic pocket, which can accommodate in CaSor the portion of its N-terminal domain displaying the consensus binding motif identified by phage display experiments. This domain inhibits the interaction of sorcin with PDCD6, a protein that carries the Sorcin consensus motif, co-localizes with Sorcin in the perinuclear region of the cell and in the midbody and is involved in the onset of apoptosis.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SORCIN
A
198Homo sapiensMutation(s): 0 
Gene Names: SRI
Find proteins for P30626 (Homo sapiens)
Go to Gene View: SRI
Go to UniProtKB:  P30626
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
SORCIN
D
32Homo sapiensMutation(s): 0 
Gene Names: SRI
Find proteins for P30626 (Homo sapiens)
Go to Gene View: SRI
Go to UniProtKB:  P30626
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

Download SDF File 
Download CCD File 
A
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.192 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 52.369α = 90.00
b = 111.580β = 90.00
c = 60.479γ = 90.00
Software Package:
Software NamePurpose
XDSdata scaling
REFMACrefinement
XDSdata reduction
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-07-29
    Type: Initial release
  • Version 1.1: 2015-12-02
    Type: Database references