3C7M

Crystal structure of reduced DsbL


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.164 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

DsbL and DsbI form a specific dithiol oxidase system for periplasmic arylsulfate sulfotransferase in uropathogenic Escherichia coli.

Grimshaw, J.P.Stirnimann, C.U.Brozzo, M.S.Malojcic, G.Grutter, M.G.Capitani, G.Glockshuber, R.

(2008) J.Mol.Biol. 380: 667-680

  • DOI: 10.1016/j.jmb.2008.05.031

  • PubMed Abstract: 
  • Disulfide bond formation in the Escherichia coli periplasm requires the transfer of electrons from substrate proteins to DsbA, which is recycled as an oxidant by the membrane protein DsbB. The highly virulent, uropathogenic E. coli strain CFT073 cont ...

    Disulfide bond formation in the Escherichia coli periplasm requires the transfer of electrons from substrate proteins to DsbA, which is recycled as an oxidant by the membrane protein DsbB. The highly virulent, uropathogenic E. coli strain CFT073 contains a second, homologous pair of proteins, DsbL and DsbI, which are encoded in a tri-cistronic operon together with a periplasmic, uropathogen-specific arylsulfate sulfotransferase (ASST). We show that DsbL and DsbI form a functional redox pair, and that ASST is a substrate of DsbL/DsbI in vivo. DsbL is the most reactive oxidizing thioredoxin-like protein known to date. In contrast to DsbA, however, DsbL oxidizes reduced RNaseA with a much lower rate and prevents unspecific aggregation of reduced insulin. The 1.55 A resolution crystal structure of reduced DsbL provides insight into the reduced state of thioredoxin-like dithiol oxidases at high resolution, and reveals an unusual cluster of basic residues stabilizing the thiolate anion of the nucleophilic active-site cysteine. We propose that the DsbL/DsbI pair of uropathogenic E. coli was acquired as an additional, specific redox couple that guarantees biological activity of ASST.


    Organizational Affiliation

    Institut für Molekularbiologie und Biophysik, ETH Zürich, CH-8093 Zürich, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Thiol:disulfide interchange protein dsbA-like
A, B
195Escherichia coli O6:H1 (strain CFT073 / ATCC 700928 / UPEC)Mutation(s): 0 
Gene Names: dsbL
Find proteins for P0A4L7 (Escherichia coli O6:H1 (strain CFT073 / ATCC 700928 / UPEC))
Go to UniProtKB:  P0A4L7
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

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Download CCD File 
A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
PGE
Query on PGE

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Download CCD File 
A
TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

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Download CCD File 
B
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
CD
Query on CD

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A, B
CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.164 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 50.945α = 90.00
b = 66.634β = 107.02
c = 77.891γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PHASERphasing
REFMACrefinement
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-07-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance