1JPE

Crystal structure of DsbD-alpha; the N-terminal domain of DsbD


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.221 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The disulfide bond isomerase DsbC is activated by an immunoglobulin-fold thiol oxidoreductase: crystal structure of the DsbC-DsbD alpha complex.

Haebel, P.W.Goldstone, D.Katzen, F.Beckwith, J.Metcalf, P.

(2002) EMBO J 21: 4774-4784

  • DOI: 10.1093/emboj/cdf489
  • Primary Citation of Related Structures:  
    1JPE, 1JZD, 1JZO

  • PubMed Abstract: 
  • The Escherichia coli disulfide bond isomerase DsbC rearranges incorrect disulfide bonds during oxidative protein folding. It is specifically activated by the periplasmic N-terminal domain (DsbDalpha) of the transmembrane electron transporter DsbD. An intermediate of the electron transport reaction was trapped, yielding a covalent DsbC-DsbDalpha complex ...

    The Escherichia coli disulfide bond isomerase DsbC rearranges incorrect disulfide bonds during oxidative protein folding. It is specifically activated by the periplasmic N-terminal domain (DsbDalpha) of the transmembrane electron transporter DsbD. An intermediate of the electron transport reaction was trapped, yielding a covalent DsbC-DsbDalpha complex. The 2.3 A crystal structure of the complex shows for the first time the specific interactions between two thiol oxidoreductases. DsbDalpha is a novel thiol oxidoreductase with the active site cysteines embedded in an immunoglobulin fold. It binds into the central cleft of the V-shaped DsbC dimer, which assumes a closed conformation on complex formation. Comparison of the complex with oxidized DsbDalpha reveals major conformational changes in a cap structure that regulates the accessibility of the DsbDalpha active site. Our results explain how DsbC is selectively activated by DsbD using electrons derived from the cytoplasm.


    Organizational Affiliation

    School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealandand.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DsbD-alphaA151Escherichia coliMutation(s): 0 
EC: 1.8.1.8
UniProt
Find proteins for P36655 (Escherichia coli (strain K12))
Explore P36655 
Go to UniProtKB:  P36655
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP36655
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.221 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.082α = 90
b = 54.603β = 90
c = 102.478γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-09-25
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance