1EEJ

CRYSTAL STRUCTURE OF THE PROTEIN DISULFIDE BOND ISOMERASE, DSBC, FROM ESCHERICHIA COLI

• PDB DOI: https://doi.org/10.2210/pdb1EEJ/pdb

• Classification: ISOMERASE
• Organism(s): Escherichia coli
• Expression System: Bacteria
• Mutation(s): No 


• Deposited: 2000-01-31 Released: 2000-08-03 
• Deposition Author(s): McCarthy, A.A., Haebel, P.W., Torronen, A., Rybin, V., Baker, E.N., Metcalf, P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.247 
• R-Value Work: 0.214 
• R-Value Observed: 0.214 

Literature

Crystal structure of the protein disulfide bond isomerase, DsbC, from Escherichia coli.

McCarthy, A.A., Haebel, P.W., Torronen, A., Rybin, V., Baker, E.N., Metcalf, P.

(2000) Nat Struct Biol 7: 196-199

• PubMed: 10700276 
• DOI: https://doi.org/10.1038/73295
• Primary Citation of Related Structures:  
  1EEJ, 1G0T


• PubMed Abstract: 
  

  DsbC is one of five Escherichia coli proteins required for disulfide bond formation and is thought to function as a disulfide bond isomerase during oxidative protein folding in the periplasm. DsbC is a 2 x 23 kDa homodimer and has both protein disulfide isomerase and chaperone activity. We report the 1.9 A resolution crystal structure of oxidized DsbC where both Cys-X-X-Cys active sites form disulfide bonds. The molecule consists of separate thioredoxin-like domains joined via hinged linker helices to an N-terminal dimerization domain. The hinges allow relative movement of the active sites, and a broad uncharged cleft between them may be involved in peptide binding and DsbC foldase activities.

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Organizational Affiliation: 

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

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 47.17 kDa 
• Atom Count: 3,500 
• Modelled Residue Count: 432 
• Deposited Residue Count: 432 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
THIOL:DISULFIDE INTERCHANGE PROTEIN	A, B	216	Escherichia coli	Mutation(s): 0  EC: 5.3.4.1
UniProt
Find proteins for P0AEG6 (Escherichia coli (strain K12)) Explore P0AEG6  Go to UniProtKB:  P0AEG6

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MES	C [auth B]	2-(N-MORPHOLINO)-ETHANESULFONIC ACID C6 H13 N O4 S SXGZJKUKBWWHRA-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.247 
• R-Value Work: 0.214 
• R-Value Observed: 0.214 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 59.336	α = 90
b = 78.149	β = 90
c = 94.489	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
SHARP	phasing
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2000-08-03 
Deposition Author(s): McCarthy, A.A., Haebel, P.W., Torronen, A., Rybin, V., Baker, E.N., Metcalf, P.

Revision History  

• Version 1.0: 2000-08-03
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-10-30
  Changes: Data collection, Database references, Derived calculations, Structure summary