3QFB

Crystal structure of the human thioredoxin reductase-thioredoxin complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.235 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Crystal structure of the human thioredoxin reductase-thioredoxin complex

Fritz-Wolf, K.Kehr, S.Stumpf, M.Rahlfs, S.Becker, K.

(2011) Nat Commun 2: 383-383

  • DOI: 10.1038/ncomms1382
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Thioredoxin reductase 1 (TrxR1) is a homodimeric flavoprotein crucially involved in the regulation of cellular redox homeostasis, growth, and differentiation. Its importance in various diseases makes TrxR1 a highly interesting drug target. Here we pr ...

    Thioredoxin reductase 1 (TrxR1) is a homodimeric flavoprotein crucially involved in the regulation of cellular redox homeostasis, growth, and differentiation. Its importance in various diseases makes TrxR1 a highly interesting drug target. Here we present the first crystal structures of human TrxR1 in complex with its substrate thioredoxin (Trx). The carboxy-terminal redox centre is found about 20 Å apart from the amino-terminal redox centre, with no major conformational changes in TrxR or Trx. Thus, our structure confirms that the enzyme uses a flexible C-terminal arm for electron transport to its substrates, which is stabilized by a guiding bar for controlled transfer. This notion is supported by mutational analyses. Furthermore, essential residues of the interface region were characterized both structurally and functionally. The structure provides templates for future drug design, and contributes to our understanding of redox regulatory processes in mammals.


    Organizational Affiliation

    Interdisciplinary Research Centre, Justus Liebig University, D-35392 Giessen, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Thioredoxin reductase 1, cytoplasmic
A, B
519Homo sapiensMutation(s): 1 
Gene Names: TXNRD1 (GRIM12, KDRF)
EC: 1.8.1.9
Find proteins for Q16881 (Homo sapiens)
Go to Gene View: TXNRD1
Go to UniProtKB:  Q16881
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Thioredoxin
C, D
116Homo sapiensMutation(s): 2 
Gene Names: TXN (TRDX, TRX, TRX1)
Find proteins for P10599 (Homo sapiens)
Go to Gene View: TXN
Go to UniProtKB:  P10599
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

Download SDF File 
Download CCD File 
A, B
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, B
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.235 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 71.270α = 90.00
b = 121.700β = 95.33
c = 73.890γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
CNSrefinement
XDSdata scaling
CNSphasing
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-07-27
    Type: Initial release