Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 255.13 kDa 
• Atom Count: 14727 
• Residue Count: 1780 
• Unique protein chains: 1

2GOY

Crystal structure of assimilatory adenosine 5'-phosphosulfate reductase with bound APS

• DOI: 10.2210/pdb2GOY/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Pseudomonas aeruginosa
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2006-04-14 Released: 2006-09-19 
• Deposition Author(s): Chartron, J., Carroll, K.S., Shiau, C., Gao, H., Leary, J.A., Bertozzi, C.R., Stout, C.D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.265 
• R-Value Work: 0.230 
• R-Value Observed: 0.232 

Literature

Substrate Recognition, Protein Dynamics, and Iron-Sulfur Cluster in Pseudomonas aeruginosa Adenosine 5'-Phosphosulfate Reductase.

Chartron, J., Carroll, K.S., Shiau, C., Gao, H., Leary, J.A., Bertozzi, C.R., Stout, C.D.

(2006) J Mol Biol 364: 152-169

• PubMed: 17010373 
• DOI: 10.1016/j.jmb.2006.08.080
• Primary Citation of Related Structures:  
  2GOY


• PubMed Abstract: 
  

APS reductase catalyzes the first committed step of reductive sulfate assimilation in pathogenic bacteria, including Mycobacterium tuberculosis, and is a promising target for drug development. We report the 2.7 A resolution crystal structure of Pseudomonas aeruginosa APS reductase in the thiosulfonate intermediate form of the catalytic cycle and with substrate bound. The structure, high-resolution Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry, and quantitative kinetic analysis, establish that the two chemically discrete steps of the overall reaction take place at distinct sites on the enzyme, mediated via conformational flexibility of the C-terminal 18 residues. The results address the mechanism by which sulfonucleotide reductases protect the covalent but labile enzyme-intermediate before release of sulfite by the protein cofactor thioredoxin. P. aeruginosa APS reductase contains an [4Fe-4S] cluster that is essential for catalysis. The structure reveals an unusual mode of cluster coordination by tandem cysteine residues and suggests how this arrangement might facilitate conformational change and cluster interaction with the substrate. Assimilatory 3'-phosphoadenosine 5'-phosphosulfate (PAPS) reductases are evolutionarily related, homologous enzymes that catalyze the same overall reaction, but do so in the absence of an [Fe-S] cluster. The APS reductase structure reveals adaptive use of a phosphate-binding loop for recognition of the APS O3' hydroxyl group, or the PAPS 3'-phosphate group.

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Organizational Affiliation: 

Department of Molecular Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
adenosine phosphosulfate reductase	A, B, C, D, E, F, G, H	275	Pseudomonas aeruginosa	Mutation(s): 0  Gene Names: cysH EC: 1.8.4.10 (PDB Primary Data), 1.8.4.8 (UniProt)
Find proteins for O05927 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)) Explore O05927  Go to UniProtKB:  O05927

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ADX	B, D, F, H	ADENOSINE-5'-PHOSPHOSULFATE C10 H14 N5 O10 P S IRLPACMLTUPBCL-KQYNXXCUSA-N
SF4	A, B, C, D, E, F, G, H	IRON/SULFUR CLUSTER Fe4 S4 LJBDFODJNLIPKO-VKOJMFJBAC

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.265 
• R-Value Work: 0.230 
• R-Value Observed: 0.232 
• Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 60.027	α = 90.1
b = 102.788	β = 102.57
c = 139.374	γ = 89.95

Software Package:

Software Name	Purpose
SCALA	data scaling
CNS	phasing
CNS	refinement
PDB_EXTRACT	data extraction
Blu-Ice	data collection
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-04-14 
• Released Date: 2006-09-19 
Deposition Author(s): Chartron, J., Carroll, K.S., Shiau, C., Gao, H., Leary, J.A., Bertozzi, C.R., Stout, C.D.

Revision History 

• Version 1.0: 2006-09-19
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance