1EEJ | pdb_00001eej

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 (Depositor), 0.246 (DCC) 
• R-Value Work: 
  0.214 (Depositor), 0.214 (DCC) 
• R-Value Observed: 
  0.214 (Depositor) 

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 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 
• Modeled 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 (Depositor), 0.246 (DCC) 
• R-Value Work:  0.214 (Depositor), 0.214 (DCC) 
• R-Value Observed: 0.214 (Depositor) 

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