2BS2

QUINOL:FUMARATE REDUCTASE FROM WOLINELLA SUCCINOGENES


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.78 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.229 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 2.2 of the entry. See complete history


Literature

Evidence for Transmembrane Proton Transfer in a Dihaem-Containing Membrane Protein Complex.

Madej, M.G.Nasiri, H.R.Hilgendorff, N.S.Schwalbe, H.Lancaster, C.R.D.

(2006) EMBO J 25: 4963

  • DOI: https://doi.org/10.1038/sj.emboj.7601361
  • Primary Citation of Related Structures:  
    2BS2

  • PubMed Abstract: 

    Membrane protein complexes can support both the generation and utilisation of a transmembrane electrochemical proton potential ('proton-motive force'), either by transmembrane electron transfer coupled to protolytic reactions on opposite sides of the membrane or by transmembrane proton transfer. Here we provide the first evidence that both of these mechanisms are combined in the case of a specific respiratory membrane protein complex, the dihaem-containing quinol:fumarate reductase (QFR) of Wolinella succinogenes, so as to facilitate transmembrane electron transfer by transmembrane proton transfer. We also demonstrate the non-functionality of this novel transmembrane proton transfer pathway ('E-pathway') in a variant QFR where a key glutamate residue has been replaced. The 'E-pathway', discussed on the basis of the 1.78-Angstrom-resolution crystal structure of QFR, can be concluded to be essential also for the viability of pathogenic epsilon-proteobacteria such as Helicobacter pylori and is possibly relevant to proton transfer in other dihaem-containing membrane proteins, performing very different physiological functions.


  • Organizational Affiliation

    Department of Molecular Membrane Biology, Max Planck Institute of Biophysics, Frankfurt am Main, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
QUINOL-FUMARATE REDUCTASE FLAVOPROTEIN SUBUNIT A
A, D
660Wolinella succinogenesMutation(s): 0 
EC: 1.3.99.1 (PDB Primary Data), 1.3.5.1 (UniProt)
Membrane Entity: Yes 
UniProt
Find proteins for P17412 (Wolinella succinogenes (strain ATCC 29543 / DSM 1740 / CCUG 13145 / JCM 31913 / LMG 7466 / NCTC 11488 / FDC 602W))
Explore P17412 
Go to UniProtKB:  P17412
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP17412
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
QUINOL-FUMARATE REDUCTASE IRON-SULFUR SUBUNIT B
B, E
241Wolinella succinogenesMutation(s): 0 
EC: 1.3.99.1 (PDB Primary Data), 1.3.5.1 (UniProt)
Membrane Entity: Yes 
UniProt
Find proteins for P17596 (Wolinella succinogenes (strain ATCC 29543 / DSM 1740 / CCUG 13145 / JCM 31913 / LMG 7466 / NCTC 11488 / FDC 602W))
Explore P17596 
Go to UniProtKB:  P17596
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP17596
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
QUINOL-FUMARATE REDUCTASE DIHEME CYTOCHROME B SUBUNIT C
C, F
256Wolinella succinogenesMutation(s): 0 
EC: 1.3.99.1
Membrane Entity: Yes 
UniProt
Find proteins for P17413 (Wolinella succinogenes (strain ATCC 29543 / DSM 1740 / CCUG 13145 / JCM 31913 / LMG 7466 / NCTC 11488 / FDC 602W))
Explore P17413 
Go to UniProtKB:  P17413
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP17413
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 8 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

Download Ideal Coordinates CCD File 
G [auth A],
P [auth D]
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
HEM
Query on HEM

Download Ideal Coordinates CCD File 
M [auth C],
N [auth C],
V [auth F],
W [auth F]
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
LMT
Query on LMT

Download Ideal Coordinates CCD File 
O [auth C],
X [auth F]
DODECYL-BETA-D-MALTOSIDE
C24 H46 O11
NLEBIOOXCVAHBD-QKMCSOCLSA-N
SF4
Query on SF4

Download Ideal Coordinates CCD File 
L [auth B],
U [auth E]
IRON/SULFUR CLUSTER
Fe4 S4
LJBDFODJNLIPKO-UHFFFAOYSA-N
F3S
Query on F3S

Download Ideal Coordinates CCD File 
K [auth B],
T [auth E]
FE3-S4 CLUSTER
Fe3 S4
FCXHZBQOKRZXKS-UHFFFAOYSA-N
FES
Query on FES

Download Ideal Coordinates CCD File 
J [auth B],
S [auth E]
FE2/S2 (INORGANIC) CLUSTER
Fe2 S2
NIXDOXVAJZFRNF-UHFFFAOYSA-N
FUM
Query on FUM

Download Ideal Coordinates CCD File 
H [auth A],
Q [auth D]
FUMARIC ACID
C4 H4 O4
VZCYOOQTPOCHFL-OWOJBTEDSA-N
NA
Query on NA

Download Ideal Coordinates CCD File 
I [auth A],
R [auth D]
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.78 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.229 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.104α = 90
b = 188.766β = 104.47
c = 117.817γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-10-25
    Type: Initial release
  • Version 1.1: 2012-07-18
    Changes: Atomic model, Derived calculations, Non-polymer description, Other, Structure summary, Version format compliance
  • Version 2.0: 2023-11-15
    Changes: Atomic model, Data collection, Database references, Derived calculations, Other
  • Version 2.1: 2023-12-13
    Changes: Refinement description
  • Version 2.2: 2024-10-23
    Changes: Structure summary