3IDV

Crystal structure of the a0a fragment of ERp72


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of the Catalytic a(0)a Fragment of the Protein Disulfide Isomerase ERp72.

Kozlov, G.Azeroual, S.Rosenauer, A.Maattanen, P.Denisov, A.Y.Thomas, D.Y.Gehring, K.

(2010) J.Mol.Biol. 401: 618-625

  • DOI: 10.1016/j.jmb.2010.06.045

  • PubMed Abstract: 
  • Protein disulfide isomerases (PDIs) are responsible for catalyzing the proper oxidation and isomerization of disulfide bonds of newly synthesized proteins in the endoplasmic reticulum (ER). The ER contains many different PDI-like proteins. Some, such ...

    Protein disulfide isomerases (PDIs) are responsible for catalyzing the proper oxidation and isomerization of disulfide bonds of newly synthesized proteins in the endoplasmic reticulum (ER). The ER contains many different PDI-like proteins. Some, such as PDI, are general enzymes that directly recognize misfolded proteins while others, such as ERp57 and ERp72, have more specialized roles. Here, we report the high-resolution X-ray crystal structure of the N-terminal portion of ERp72 (also known as CaBP2 or PDI A4), which contains two a(0)a catalytic thioredoxin-like domains. The structure shows that the a(0) domain contains an additional N-terminal beta-strand and a different conformation of the beta5-alpha4 loop relative to other thioredoxin-like domains. The structure of the a domain reveals that a conserved arginine residue inserts into the hydrophobic core and makes a salt bridge with a conserved glutamate residue in the vicinity of the catalytic site. A structural model of full-length ERp72 shows that all three catalytic sites roughly face each other and positions the adjacent hydrophobic patches that are likely involved in protein substrate binding.


    Organizational Affiliation

    Department of Biochemistry, Groupe de recherche axé sur la structure des protéines, McGill University, 3649 Promenade Sir William Osler, Montréal, Québec, Canada H3G 0B1.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein disulfide-isomerase A4
A
241Homo sapiensMutation(s): 0 
Gene Names: PDIA4 (ERP70, ERP72)
EC: 5.3.4.1
Find proteins for P13667 (Homo sapiens)
Go to Gene View: PDIA4
Go to UniProtKB:  P13667
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.206 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 54.883α = 90.00
b = 54.883β = 90.00
c = 166.497γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
ADSCdata collection
HKL-2000data scaling
HKL-2000data reduction
REFMACrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-07-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance