2IWT

Thioredoxin h2 (HvTrxh2) in a mixed disulfide complex with the target protein BASI


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.224 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural Basis for Target Protein Recognition by the Protein Disulfide Reductase Thioredoxin.

Maeda, K.Hagglund, P.Finnie, C.Svensson, B.Henriksen, A.

(2006) Structure 14: 1701

  • DOI: 10.1016/j.str.2006.09.012
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Thioredoxin is ubiquitous and regulates various target proteins through disulfide bond reduction. We report the structure of thioredoxin (HvTrxh2 from barley) in a reaction intermediate complex with a protein substrate, barley alpha-amylase/subtilisi ...

    Thioredoxin is ubiquitous and regulates various target proteins through disulfide bond reduction. We report the structure of thioredoxin (HvTrxh2 from barley) in a reaction intermediate complex with a protein substrate, barley alpha-amylase/subtilisin inhibitor (BASI). The crystal structure of this mixed disulfide shows a conserved hydrophobic motif in thioredoxin interacting with a sequence of residues from BASI through van der Waals contacts and backbone-backbone hydrogen bonds. The observed structural complementarity suggests that the recognition of features around protein disulfides plays a major role in the specificity and protein disulfide reductase activity of thioredoxin. This novel insight into the function of thioredoxin constitutes a basis for comprehensive understanding of its biological role. Moreover, comparison with structurally related proteins shows that thioredoxin shares a mechanism with glutaredoxin and glutathione transferase for correctly positioning substrate cysteine residues at the catalytic groups but possesses a unique structural element that allows recognition of protein disulfides.


    Related Citations: 
    • Identification of Thioredoxin H-Reducible Disulphides in Proteomes by Differential Labelling of Cysteines: Insight Into Recognition and Regulation of Proteins in Barley Seeds by Thioredoxin H
      Maeda, K., Finnie, C., Svensson, B.
      (2005) Proteomics 5: 1634

    Organizational Affiliation

    Enzyme and Protein Chemistry, BioCentrum-DTU, Søltofts Plads, Building 224, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
THIOREDOXIN H ISOFORM 2
A
125Hordeum vulgareMutation(s): 1 
Find proteins for Q7XZK2 (Hordeum vulgare subsp. vulgare)
Go to UniProtKB:  Q7XZK2

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ALPHA-AMYLASE/SUBTILISIN INHIBITOR
B
189Hordeum vulgareMutation(s): 1 
Find proteins for P07596 (Hordeum vulgare)
Go to UniProtKB:  P07596
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FLC
Query on FLC

Download CCD File 
B
CITRATE ANION
C6 H5 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.224 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.148α = 90
b = 76.148β = 90
c = 129.432γ = 90
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-11-15
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-07-12
    Changes: Data collection