Experimental Data Snapshot

  • Resolution: 1.46 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.192 

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This is version 1.2 of the entry. See complete history


Crystal Structure of the Carbohydrate Recognition Domain of P58/Ergic-53, a Protein Involved in Glycoprotein Export from the Endoplasmic Reticulum.

Velloso, L.M.Svensson, K.Schneider, G.Pettersson, R.F.Lindqvist, Y.

(2002) J Biol Chem 277: 15979

  • DOI: https://doi.org/10.1074/jbc.M112098200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    p58/ERGIC-53 is an animal calcium-dependent lectin that cycles between the endoplasmic reticulum (ER) and the Golgi complex and appears to act as a cargo receptor for a subset of soluble glycoproteins exported from the ER. We have determined the crystal structure of the carbohydrate recognition domain (CRD) of p58, the rat homologue of human ERGIC-53, to 1.46 A resolution. The fold and ligand binding site are most similar to those of leguminous lectins. The structure also resembles that of the CRD of the ER folding chaperone calnexin and the neurexins, a family of non-lectin proteins expressed on neurons. The CRD comprises one concave and one convex beta-sheet packed into a beta-sandwich. The ligand binding site resides in a negatively charged cleft formed by conserved residues. A large surface patch of conserved residues with a putative role in protein-protein interactions and oligomerization lies on the opposite side of the ligand binding site. Together with previous functional data, the structure defines a new and expanding class of calcium-dependent animal lectins and provides a starting point for the understanding of glycoprotein sorting between the ER and the Golgi.

  • Organizational Affiliation

    Division of Molecular Structural Biology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Tomtebodavägen 6, S-17177 Stockholm, Sweden.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
P58/ERGIC-53260Rattus norvegicusMutation(s): 0 
Find proteins for Q62902 (Rattus norvegicus)
Explore Q62902 
Go to UniProtKB:  Q62902
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ62902
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.46 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.192 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.043α = 90
b = 85.407β = 90
c = 127.672γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-02-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2018-01-17
    Changes: Data collection