2HLS

The crystal structure of a protein disulfide oxidoreductase from Aeropyrum pernix k1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.187 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

A Novel Member of the Protein Disulfide Oxidoreductase Family from Aeropyrum pernix K1: Structure, Function and Electrostatics.

D'Ambrosio, K.Pedone, E.Langella, E.De Simone, G.Rossi, M.Pedone, C.Bartolucci, S.

(2006) J Mol Biol 362: 743-752

  • DOI: 10.1016/j.jmb.2006.07.038
  • Primary Citation of Related Structures:  
    2HLS

  • PubMed Abstract: 
  • The formation of disulfide bonds between cysteine residues is a rate-limiting step in protein folding. To control this oxidative process, different organisms have developed different systems. In bacteria, disulfide bond formation is assisted by the D ...

    The formation of disulfide bonds between cysteine residues is a rate-limiting step in protein folding. To control this oxidative process, different organisms have developed different systems. In bacteria, disulfide bond formation is assisted by the Dsb protein family; in eukarya, disulfide bond formation and rearrangement are catalyzed by PDI. In thermophilic organisms, a potential key role in disulfide bond formation has recently been ascribed to a new cytosolic Protein Disulphide Oxidoreductase family whose members have a molecular mass of about 26 kDa and are characterized by two thioredoxin folds comprising a CXXC active site motif each. Here we report on the functional and structural characterization of ApPDO, a new member of this family, which was isolated from the archaeon Aeropyrum pernix K1. Functional studies have revealed that ApPDO can catalyze the reduction, oxidation and isomerization of disulfide bridges. Structural studies have shown that this protein has two CXXC active sites with fairly similar geometrical parameters typical of a stable conformation. Finally, a theoretical calculation of the cysteine pK(a) values has suggested that the two active sites have similar functional properties and each of them can impart activity to the enzyme. Our results are evidence of functional similarity between the members of the Protein Disulphide Oxidoreductase family and the eukaryotic enzyme PDI. However, as the different three-dimensional features of these two biological systems strongly suggest significantly different mechanisms of action, further experimental studies will be needed to make clear how different three-dimensional structures can result in systems with similar functional behavior.


    Organizational Affiliation

    Istituto di Biostrutture e Bioimmagini, C.N.R., Napoli, Italy.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
protein disulfide oxidoreductaseAB243Aeropyrum pernix K1Mutation(s): 0 
Gene Names: APE_0775
Find proteins for Q9YDZ4 (Aeropyrum pernix (strain ATCC 700893 / DSM 11879 / JCM 9820 / NBRC 100138 / K1))
Explore Q9YDZ4 
Go to UniProtKB:  Q9YDZ4
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

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A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.187 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 90.625α = 90
b = 101.424β = 90
c = 128.927γ = 90
Software Package:
Software NamePurpose
AMoREphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-10-03
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Source and taxonomy, Version format compliance