3POS

Crystal structure of the globular domain of human calreticulin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.172 

wwPDB Validation 3D Report Full Report


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
CalreticulinABC265Homo sapiensMutation(s): 0 
Gene Names: CALRCRTC
Find proteins for P27797 (Homo sapiens)
Explore P27797 
Go to UniProtKB:  P27797
NIH Common Fund Data Resources
PHAROS  P27797
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download CCD File 
A, B, C
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.172 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.23α = 90
b = 91.1β = 90
c = 194.02γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
AMoREphasing
BUSTERrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

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