3QFB

Crystal structure of the human thioredoxin reductase-thioredoxin complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.235 
  • R-Value Observed: 0.235 

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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:  
    3QFA, 3QFB

  • 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 present the first crystal structures of human TrxR1 in complex with its substrate thioredoxin (Trx) ...

    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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Thioredoxin reductase 1, cytoplasmicA, B519Homo sapiensMutation(s): 1 
Gene Names: GRIM12KDRFTXNRD1
EC: 1.8.1.9
UniProt & NIH Common Fund Data Resources
Find proteins for Q16881 (Homo sapiens)
Explore Q16881 
Go to UniProtKB:  Q16881
PHAROS:  Q16881
GTEx:  ENSG00000198431 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ16881
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
ThioredoxinC, D116Homo sapiensMutation(s): 2 
Gene Names: TRDXTRXTRX1TXN
UniProt & NIH Common Fund Data Resources
Find proteins for P10599 (Homo sapiens)
Explore P10599 
Go to UniProtKB:  P10599
PHAROS:  P10599
GTEx:  ENSG00000136810 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP10599
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.235 
  • R-Value Observed: 0.235 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 71.27α = 90
b = 121.7β = 95.33
c = 73.89γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
CNSrefinement
XDSdata reduction
XDSdata scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

Revision History  (Full details and data files)

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