5DQY

A fully oxidized human thioredoxin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.158 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

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: 10.1016/j.bbrc.2015.10.003

  • 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 ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Thioredoxin
A
105Homo sapiensMutation(s): 0 
Gene Names: TXN (TRDX, TRX, TRX1)
Find proteins for P10599 (Homo sapiens)
Go to Gene View: TXN
Go to UniProtKB:  P10599
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
BEZ
Query on BEZ

Download SDF File 
Download CCD File 
A
BENZOIC ACID
C7 H6 O2
WPYMKLBDIGXBTP-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.158 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 53.204α = 90.00
b = 61.231β = 90.00
c = 64.839γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2015-09-15 
  • Released Date: 2015-12-23 
  • Deposition Author(s): Hwang, J.

Funding OrganizationLocationGrant Number
KRIBBKorea, Republic Of--

Revision History 

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