2VPX

Polysulfide reductase with bound quinone (UQ1)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.314 
  • R-Value Work: 0.301 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Molecular Mechanism of Energy Conservation in Polysulfide Respiration.

Jormakka, M.Yokoyama, K.Yano, T.Tamakoshi, M.Akimoto, S.Shimamura, T.Curmi, P.Iwata, S.

(2008) Nat.Struct.Mol.Biol. 15: 730

  • DOI: 10.1038/nsmb.1434
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Bacterial polysulfide reductase (PsrABC) is an integral membrane protein complex responsible for quinone-coupled reduction of polysulfide, a process important in extreme environments such as deep-sea vents and hot springs. We determined the structure ...

    Bacterial polysulfide reductase (PsrABC) is an integral membrane protein complex responsible for quinone-coupled reduction of polysulfide, a process important in extreme environments such as deep-sea vents and hot springs. We determined the structure of polysulfide reductase from Thermus thermophilus at 2.4-A resolution, revealing how the PsrA subunit recognizes and reduces its unique polyanionic substrate. The integral membrane subunit PsrC was characterized using the natural substrate menaquinone-7 and inhibitors, providing a comprehensive representation of a quinone binding site and revealing the presence of a water-filled cavity connecting the quinone binding site on the periplasmic side to the cytoplasm. These results suggest that polysulfide reductase could be a key energy-conserving enzyme of the T. thermophilus respiratory chain, using polysulfide as the terminal electron acceptor and pumping protons across the membrane via a previously unknown mechanism.


    Organizational Affiliation

    Department of Biophysics, University of New South Wales, Barker Street, Sydney, New South Wales 2052, Australia. m.jormakka@centenary.org.au




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
THIOSULFATE REDUCTASE
A, E
765Thermus thermophilus (strain HB27 / ATCC BAA-163 / DSM 7039)Mutation(s): 0 
N/A
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Mo/Wbis-MGD Oxidoreductases
Protein: 
Polysulfide Reductase PsrABC (native)
Find proteins for Q72LA4 (Thermus thermophilus (strain HB27 / ATCC BAA-163 / DSM 7039))
Go to UniProtKB:  Q72LA4
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
NRFC PROTEIN
B, F
195Thermus thermophilus (strain HB27 / ATCC BAA-163 / DSM 7039)Mutation(s): 0 
Gene Names: nrfC
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Mo/Wbis-MGD Oxidoreductases
Protein: 
Polysulfide Reductase PsrABC (native)
Find proteins for Q72LA5 (Thermus thermophilus (strain HB27 / ATCC BAA-163 / DSM 7039))
Go to UniProtKB:  Q72LA5
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
HYPOTHETICAL MEMBRANE SPANNING PROTEIN
C, G
253Thermus thermophilus (strain HB27 / ATCC BAA-163 / DSM 7039)Mutation(s): 0 
N/A
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Mo/Wbis-MGD Oxidoreductases
Protein: 
Polysulfide Reductase PsrABC (native)
Find proteins for Q72LA6 (Thermus thermophilus (strain HB27 / ATCC BAA-163 / DSM 7039))
Go to UniProtKB:  Q72LA6
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SF4
Query on SF4

Download SDF File 
Download CCD File 
A, B, E, F
IRON/SULFUR CLUSTER
Fe4 S4
LJBDFODJNLIPKO-VKOJMFJBAC
 Ligand Interaction
UQ1
Query on UQ1

Download SDF File 
Download CCD File 
C, G
UBIQUINONE-1
C14 H18 O4
SOECUQMRSRVZQQ-UHFFFAOYSA-N
 Ligand Interaction
MO
Query on MO

Download SDF File 
Download CCD File 
A, E
MOLYBDENUM ATOM
Mo
ZOKXTWBITQBERF-UHFFFAOYSA-N
 Ligand Interaction
MGD
Query on MGD

Download SDF File 
Download CCD File 
A, E
2-AMINO-5,6-DIMERCAPTO-7-METHYL-3,7,8A,9-TETRAHYDRO-8-OXA-1,3,9,10-TETRAAZA-ANTHRACEN-4-ONE GUANOSINE DINUCLEOTIDE
MOLYBDOPTERIN GUANOSINE DINUCLEOTIDE
C20 H26 N10 O13 P2 S2
VQAGYJCYOLHZDH-ILXWUORBSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.314 
  • R-Value Work: 0.301 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 114.587α = 90.00
b = 161.162β = 90.00
c = 239.647γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
CNSrefinement
REFMACphasing
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-06-10
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance