Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

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

Macromolecule Content

• Total Structure Weight: 12.27 kDa 
• Atom Count: 928 
• Residue Count: 109 
• Unique protein chains: 1

3F3Q

Crystal structure of the oxidised form of thioredoxin 1 from saccharomyces cerevisiae

• DOI: 10.2210/pdb3F3Q/pdb

• Classification: ELECTRON TRANSPORT
• Organism(s): Saccharomyces cerevisiae
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2008-10-31 Released: 2009-10-20 
• Deposition Author(s): Zhang, Y.R., Bao, R., Zhou, C.Z., Chen, Y.X.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.76 Å
• R-Value Free: 0.245 
• R-Value Work: 0.198 
• R-Value Observed: 0.200 

Literature

Structural and kinetic analysis of Saccharomyces cerevisiae thioredoxin Trx1: implications for the catalytic mechanism of GSSG reduced by the thioredoxin system

Bao, R., Zhang, Y.R., Lou, X., Zhou, C.Z., Chen, Y.X.

(2009) Biochim Biophys Acta 1794: 1218-1223

• PubMed: 19362171 
• DOI: 10.1016/j.bbapap.2009.04.001
• Primary Citation of Related Structures:  
  3F3Q, 3F3R


• PubMed Abstract: 
  

Thioredoxin (Trx) and glutathione/glutaredoxin (GSH/Grx) systems play the dominant role in cellular redox homeostasis. Recently the Trx system has been shown to be responsible to control the balance of GSH/GSSG once the glutathione reductase system is not available. To decipher the structural basis of electron transfer from the Trx system to GSSG, we solved the crystal structures of oxidized Trx1 and glutathionylated Trx1Cys33Ser mutant at 1.76 and 1.80 A, respectively. Comparative structural analysis revealed a key residue Met35 involved in the Trx-GSSG recognition. Subsequent mutagenesis and kinetic studies proved that Met35Arg mutation could alter the apparent K(m) and V(max) values of the reaction. These findings gave us the structural insights into GSSG reduction catalyzed by the Trx system.

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Organizational Affiliation: 

Institute of Protein Research, Tongji University, Shanghai, PR China.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Thioredoxin-1	A	109	Saccharomyces cerevisiae	Mutation(s): 0  Gene Names: TRX1
Find proteins for P22217 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore P22217  Go to UniProtKB:  P22217

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	A	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.76 Å
• R-Value Free: 0.245 
• R-Value Work: 0.198 
• R-Value Observed: 0.200 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 32.292	α = 90
b = 46.588	β = 90
c = 64.2	γ = 90

Software Package:

Software Name	Purpose
CrystalClear	data collection
MOLREP	phasing
REFMAC	refinement
d*TREK	data reduction
d*TREK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-10-31 
• Released Date: 2009-10-20 
Deposition Author(s): Zhang, Y.R., Bao, R., Zhou, C.Z., Chen, Y.X.

Revision History 

• Version 1.0: 2009-10-20
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance