Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report | Ligand Interaction

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 31.04 kDa 
• Atom Count: 2162 
• Modelled Residue Count: 274 
• Deposited Residue Count: 274 
• Unique protein chains: 1

1QXN

Solution Structure of the 30 kDa Polysulfide-sulfur Transferase Homodimer from Wolinella Succinogenes

• PDB DOI: 10.2210/pdb1QXN/pdb
• BMRB: 4776

• Classification: TRANSFERASE
• Organism(s): Wolinella succinogenes
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2003-09-08 Released: 2004-02-24 
• Deposition Author(s): Lin, Y.J., Dancea, F., Loehr, F., Klimmek, O., Pfeiffer-Marek, S., Nilges, M., Wienk, H., Kroeger, A., Rueterjans, H.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 10 
• Selection Criteria: target function 

Literature

Solution Structure of the 30 kDa Polysulfide-Sulfur Transferase Homodimer from Wolinella succinogenes

Lin, Y.J., Dancea, F., Loehr, F., Klimmek, O., Pfeiffer-Marek, S., Nilges, M., Wienk, H., Kroeger, A., Rueterjans, H.

(2004) Biochemistry 43: 1418-1424

• PubMed: 14769017 
• DOI: 10.1021/bi0356597
• Primary Citation of Related Structures:  
  1QXN


• PubMed Abstract: 
  

The periplasmic polysulfide-sulfur transferase (Sud) protein encoded by Wolinella succinogenes is involved in oxidative phosphorylation with polysulfide-sulfur as a terminal electron acceptor. The polysulfide-sulfur is covalently bound to the catalytic Cys residue of the Sud protein and transferred to the active site of the membranous polysulfide reductase. The solution structure of the homodimeric Sud protein has been determined using heteronuclear multidimensional NMR techniques. The structure is based on NOE-derived distance restraints, backbone hydrogen bonds, and torsion angle restraints as well as residual dipolar coupling restraints for a refinement of the relative orientation of the monomer units. The monomer structure consists of a five-stranded parallel beta-sheet enclosing a hydrophobic core, a two-stranded antiparallel beta-sheet, and six alpha-helices. The dimer fold is stabilized by hydrophobic residues and ion pairs found in the contact area between the two monomers. Similar to rhodanese enzymes, Sud catalyzes the transfer of the polysulfide-sulfur to the artificial acceptor cyanide. Despite their similar functions and active sites, the amino acid sequences and structures of these proteins are quite different.

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Organizational Affiliation: 

Institute of Biophysical Chemistry, Center for Biomolecular Magnetic Resonance, J. W. Goethe-University, Marie-Curie-Strasse 9, D-60439 Frankfurt am Main, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
sulfide dehydrogenase	A, B	137	Wolinella succinogenes	Mutation(s): 0  Gene Names: sud
UniProt
Find proteins for Q56748 (Wolinella succinogenes) Explore Q56748  Go to UniProtKB:  Q56748

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PS5	C [auth A], D [auth B]	PENTASULFIDE-SULFUR S5 FBNHIFPJXGPDIP-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 10 
• Selection Criteria: target function 
• OLDERADO: 1QXN Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-09-08 
• Released Date: 2004-02-24 
Deposition Author(s): Lin, Y.J., Dancea, F., Loehr, F., Klimmek, O., Pfeiffer-Marek, S., Nilges, M., Wienk, H., Kroeger, A., Rueterjans, H.

Revision History  

• Version 1.0: 2004-02-24
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2022-03-02
  Changes: Data collection, Database references, Derived calculations