Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Macromolecule Content

• Total Structure Weight: 13.12 kDa 
• Atom Count: 896 
• Residue Count: 106 
• Unique protein chains: 1

4RUV

Crystal structure of thioredoxin 2 from Staphylococcus aureus NCTC8325

• DOI: 10.2210/pdb4RUV/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Staphylococcus aureus subsp. aureus NCTC 8325
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2014-11-22 Released: 2015-12-09 
• Deposition Author(s): Bose, M., Biswas, R., Roychowdhury, A., Bhattacharyya, S., Ghosh, A.K., Das, A.K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.93 Å
• R-Value Free: 0.239 
• R-Value Work: 0.170 
• R-Value Observed: 0.173 

Literature

Elucidation of the mechanism of disulfide exchange between staphylococcal thioredoxin2 and thioredoxin reductase2: a structural insight.

Bose, M., Bhattacharyya, S., Biswas, R., Roychowdhury, A., Bhattacharjee, A., Ghosh, A.K., Das, A.K.

(2019) Biochimie 

• PubMed: 30710560 
• DOI: 10.1016/j.biochi.2019.01.019
• Primary Citation of Related Structures:  
  4RUV, 6A4J


• PubMed Abstract: 
  

The redox homeostasis of cytoplasm is maintained by a series of disulfide exchange reactions mediated by proteins belonging to the thioredoxin superfamily. Thioredoxin and thioredoxin reductase, being the major members of the family, play a key role in oxidative stress response of Staphylococcus aureus. In this report, we have identified and characterised an active thioredoxin system of the mentioned pathogen. Crystal structure of thioredoxin2 (SaTrx2) in its reduced form reveals that it contains the conserved redox active WCXXC motif and a thioredoxin fold. Thioredoxin reductase2 (SaTR2) is a flavoprotein and consists of two Rossmann folds as the binding sites for FAD and NADPH. Crystal structure of the SaTR2 holoenzyme shows that the protein consists of two domains and the catalytic site comprises of an intramolecular disulfide bond formed between two sequentially distal cysteine residues. Biophysical and biochemical studies unveil that SaTrx2 and SaTR2 can physically interact in solution and in the course of sustaining the redox equilibrium, the latter reduces the former. Molecular docking has been performed to illustrate the interface formed between SaTrx2 and SaTR2 during the disulfide exchange reaction.

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Organizational Affiliation: 

Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India. Electronic address: [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Thioredoxin	A	114	Staphylococcus aureus subsp. aureus NCTC 8325	Mutation(s): 0  Gene Names: SAOUHSC_00834
Find proteins for Q2G000 (Staphylococcus aureus (strain NCTC 8325 / PS 47)) Explore Q2G000  Go to UniProtKB:  Q2G000

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.93 Å
• R-Value Free: 0.239 
• R-Value Work: 0.170 
• R-Value Observed: 0.173 
• Space Group: P 4₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 31.376	α = 90
b = 31.376	β = 90
c = 94.804	γ = 90

Software Package:

Software Name	Purpose
SCALA	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
StructureStudio	data collection
XDS	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2014-11-22 
• Released Date: 2015-12-09 
Deposition Author(s): Bose, M., Biswas, R., Roychowdhury, A., Bhattacharyya, S., Ghosh, A.K., Das, A.K.

Revision History 

• Version 1.0: 2015-12-09
  Type: Initial release
  
• Version 1.1: 2019-02-13
  Changes: Data collection, Database references