A fully oxidized human thioredoxin

Experimental Data Snapshot

  • Resolution: 1.40 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.160 

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Crystal structure of fully oxidized human thioredoxin.

Hwang, J.Nguyen, L.T.Jeon, Y.H.Lee, C.Y.Kim, M.H.

(2015) Biochem Biophys Res Commun 467: 218-222

  • DOI: https://doi.org/10.1016/j.bbrc.2015.10.003
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    In addition to the active cysteines located at positions 32 and 35 in humans, mammalian cytosolic thioredoxin (TRX) possesses additional conserved cysteine residues at positions 62, 69, and 73. These non-canonical cysteine residues, that are distinct from prokaryotic TRX and also not found in mammalian mitochondrial TRX, have been implicated in biological functions regulating signal transduction pathways via their post-translational modifications. Here, we describe for the first time the structure of a fully oxidized TRX. The structure shows a non-active Cys62-Cys69 disulfide bond in addition to the active Cys32-Cys35 disulfide. The non-active disulfide switches the α3-helix of TRX, composed of residues Cys62 to Glu70, to a bulging loop and dramatically changes the environment of the TRX residues involved in the interaction with its reductase and other cellular substrates. This structural modification may have implications for a number of potential functions of TRX including the regulation of redox-dependent signaling pathways.

  • Organizational Affiliation

    Infection and Immunity Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, South Korea.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Thioredoxin105Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P10599 (Homo sapiens)
Explore P10599 
Go to UniProtKB:  P10599
GTEx:  ENSG00000136810 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP10599
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.40 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.160 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.204α = 90
b = 61.231β = 90
c = 64.839γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

  • Released Date: 2015-12-23 
  • Deposition Author(s): Hwang, J.

Funding OrganizationLocationGrant Number
KRIBBKorea, Republic Of--

Revision History  (Full details and data files)

  • Version 1.0: 2015-12-23
    Type: Initial release