Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 15337.96 
• Atom Count: 1093 
• Residue Count: 141 
• Unique protein chains: 1

2NUK

Soluble Domain of the Rieske Iron-Sulfur Protein from Rhodobacter sphaeroides

• DOI: 10.2210/pdb2NUK/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Rhodobacter sphaeroides
• Expression System: Escherichia coli


• Deposited: 2006-11-09 Released: 2007-04-10 
• Deposition Author(s): Kolling, D., Brunzelle, J., Lhee, S., Crofts, A.R., Nair, S.K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.2 Å
• R-Value Free: 0.136 
• R-Value Work: 0.118 

Literature

Atomic resolution structures of rieske iron-sulfur protein: role of hydrogen bonds in tuning the redox potential of iron-sulfur clusters.

Kolling, D.J., Brunzelle, J.S., Lhee, S., Crofts, A.R., Nair, S.K.

(2007) Structure 15: 29-38

• PubMed: 17223530 
• DOI: 10.1016/j.str.2006.11.012
• Primary Citation of Related Structures:  
  2NWF, 2NVG, 2NVF, 2NVE, 2NUM


• PubMed Abstract: 
  

The Rieske [2Fe-2S] iron-sulfur protein of cytochrome bc(1) functions as the initial electron acceptor in the rate-limiting step of the catalytic reaction. Prior studies have established roles for a number of conserved residues that hydrogen bond to ligands of the [2Fe-2S] cluster. We have constructed site-specific variants at two of these residues, measured their thermodynamic and functional properties, and determined atomic resolution X-ray crystal structures for the native protein at 1.2 A resolution and for five variants (Ser-154-->Ala, Ser-154-->Thr, Ser-154-->Cys, Tyr-156-->Phe, and Tyr-156-->Trp) to resolutions between 1.5 A and 1.1 A. These structures and complementary biophysical data provide a molecular framework for understanding the role hydrogen bonds to the cluster play in tuning thermodynamic properties, and hence the rate of this bioenergetic reaction. These studies provide a detailed structure-function dissection of the role of hydrogen bonds in tuning the redox potentials of [2Fe-2S] clusters.

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Organizational Affiliation: 

Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, IL 61801, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Ubiquinol-cytochrome c reductase iron-sulfur subunit	A	141	Rhodobacter sphaeroides	Mutation(s): 0  Gene Names: petA (fbcF) EC: 7.1.1.8
Find proteins for Q02762 (Rhodobacter sphaeroides) Go to UniProtKB:  Q02762

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
FES	A	FE2/S2 (INORGANIC) CLUSTER Fe2 S2 NIXDOXVAJZFRNF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.2 Å
• R-Value Free: 0.136 
• R-Value Work: 0.118 
• Space Group: I 4

Unit Cell:

Length (Å)	Angle (°)
a = 70.568	α = 90.00
b = 70.568	β = 90.00
c = 54.769	γ = 90.00

Software Package:

Software Name	Purpose
MAR345	data collection
HKL-2000	data reduction
REFMAC	refinement
HKL-2000	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-11-09 
• Released Date: 2007-04-10 
• Deposition Author(s): Kolling, D., Brunzelle, J., Lhee, S., Crofts, A.R., Nair, S.K.

Revision History 

• Version 1.0: 2007-04-10
  Type: Initial release
• Version 1.1: 2008-05-01
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2017-10-18
  Type: Refinement description