3POW

Crystal structure of the globular domain of human calreticulin

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.177 

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This is version 1.2 of the entry. See complete history. 


Literature

X-ray structure of the human calreticulin globular domain reveals a Peptide-binding area and suggests a multi-molecular mechanism

Chouquet, A., Paidassi, H., Ling, W.L., Frachet, P., Houen, G., Arlaud, G.J., Gaboriaud, C.

(2011) PLoS One 6: e17886-e17886

  • DOI: 10.1371/journal.pone.0017886
  • Primary Citation of Related Structures:  
    3POS, 3POW

  • PubMed Abstract: 

    • In the endoplasmic reticulum, calreticulin acts as a chaperone and a Ca(2+)-signalling protein. At the cell surface, it mediates numerous important biological effects. The crystal structure of the human calreticulin globular domain was solved at 1.55 ...

    In the endoplasmic reticulum, calreticulin acts as a chaperone and a Ca(2+)-signalling protein. At the cell surface, it mediates numerous important biological effects. The crystal structure of the human calreticulin globular domain was solved at 1.55 Å resolution. Interactions of the flexible N-terminal extension with the edge of the lectin site are consistently observed, revealing a hitherto unidentified peptide-binding site. A calreticulin molecular zipper, observed in all crystal lattices, could further extend this site by creating a binding cavity lined by hydrophobic residues. These data thus provide a first structural insight into the lectin-independent binding properties of calreticulin and suggest new working hypotheses, including that of a multi-molecular mechanism.

    Organizational Affiliation: 

    Institut de Biologie Structurale Jean-Pierre Ebel, CEA, Grenoble, France.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
calreticulinA265Homo sapiensMutation(s): 0 
Gene Names: CALR, CRTC
Find proteins for P27797 (Homo sapiens)
Explore P27797 
Go to UniProtKB:  P27797
NIH Common Fund Data Resources
PHAROS  P27797
GTEx  ENSG00000179218
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA
Download Ideal Coordinates CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.177 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.89α = 90
b = 70.39β = 90
c = 91.82γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
BUSTER-TNTrefinement
PDB_EXTRACTdata extraction
XDSdata scaling
XDSdata reduction
PHASERphasing
BUSTERrefinement

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

  • Deposited Date: 2010-11-23 
  • Released Date: 2011-03-09 
    • Deposition Author(s): Gaboriaud, C.

Revision History 

  • Version 1.0: 2011-03-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-08-09
    Changes: Data collection, Refinement description, Source and taxonomy