1UVZ

structure of human thioredoxin 2

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.01 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.203 

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This is version 1.2 of the entry. See complete history. 


Literature

Crystal Structures of Oxidized and Reduced Forms of Human Mitochondrial Thioredoxin 2.

Smeets, A., Evrard, C., Landtmeters, M., Marchand, C., Knoops, B., Declercq, J.P.

(2005) Protein Sci 14: 2610

  • DOI: 10.1110/ps.051632905
  • Primary Citation of Related Structures:  
    1W89, 1UVZ, 1W4V

  • PubMed Abstract: 

    • Mammalian thioredoxin 2 is a mitochondrial isoform of highly evolutionary conserved thioredoxins. Thioredoxins are small ubiquitous protein-disulfide oxidoreductases implicated in a large variety of biological functions. In mammals, thioredoxin 2 is enco ...

    Mammalian thioredoxin 2 is a mitochondrial isoform of highly evolutionary conserved thioredoxins. Thioredoxins are small ubiquitous protein-disulfide oxidoreductases implicated in a large variety of biological functions. In mammals, thioredoxin 2 is encoded by a nuclear gene and is targeted to mitochondria by a N-terminal mitochondrial presequence. Recently, mitochondrial thioredoxin 2 was shown to interact with components of the mitochondrial respiratory chain and to play a role in the control of mitochondrial membrane potential, regulating mitochondrial apoptosis signaling pathway. Here we report the first crystal structures of a mammalian mitochondrial thioredoxin 2. Crystal forms of reduced and oxidized human thioredoxin 2 are described at 2.0 and 1.8 A resolution. Though the folding is rather similar to that of human cytosolic/nuclear thioredoxin 1, important differences are observed during the transition between the oxidized and the reduced states of human thioredoxin 2, compared with human thioredoxin 1. In spite of the absence of the Cys residue implicated in dimer formation in human thioredoxin 1, dimerization still occurs in the crystal structure of human thioredoxin 2, mainly mediated by hydrophobic contacts, and the dimers are associated to form two-dimensional polymers. Interestingly, the structure of human thioredoxin 2 reveals possible interaction domains with human peroxiredoxin 5, a substrate protein of human thioredoxin 2 in mitochondria.

    Related Citations: 
    • Human Mitochondrial Thioredoxin
      Damdimopoulos, A.E., Miranda-Vizuete, A., Pelto-Huikkos, M., Gustafsson, J.A., Spyrou, G.
      (2002) J Biol Chem 277: 33249
    Organizational Affiliation: 

    Unit of Structural Chemistry (CSTR), Université catholique de Louvain, 1 place Louis Pasteur, B-1348 Louvain-la-Neuve, Belgium.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
THIOREDOXIN A, B, C, D, E, F119Homo sapiensMutation(s): 0 
Gene Names: TXN2, TRX2
Find proteins for Q99757 (Homo sapiens)
Explore Q99757 
Go to UniProtKB:  Q99757
NIH Common Fund Data Resources
PHAROS:  Q99757
GTEx:  ENSG00000100348
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.01 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.203 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.038α = 87.96
b = 49.087β = 83.19
c = 78.977γ = 79.08
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
BEASTphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-06-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2019-07-24
    Changes: Data collection