3IPZ

Crystal structure of Arabidopsis monothiol glutaredoxin AtGRXcp


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.191 

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This is version 1.1 of the entry. See complete history


Literature

Structure of Arabidopsis chloroplastic monothiol glutaredoxin AtGRXcp.

Li, L.Cheng, N.Hirschi, K.D.Wang, X.

(2010) Acta Crystallogr D Biol Crystallogr 66: 725-732

  • DOI: 10.1107/S0907444910013119
  • Primary Citation of Related Structures:  
    3IPZ

  • PubMed Abstract: 
  • Monothiol glutaredoxins (Grxs) play important roles in maintaining redox homeostasis in living cells and are conserved across species. Arabidopsis thaliana monothiol glutaredoxin AtGRXcp is critical for protection from oxidative stress in chloroplasts. The crystal structure of AtGRXcp has been determined at 2 ...

    Monothiol glutaredoxins (Grxs) play important roles in maintaining redox homeostasis in living cells and are conserved across species. Arabidopsis thaliana monothiol glutaredoxin AtGRXcp is critical for protection from oxidative stress in chloroplasts. The crystal structure of AtGRXcp has been determined at 2.4 A resolution. AtGRXcp has a glutaredoxin/thioredoxin-like fold with distinct structural features that differ from those of dithiol Grxs. The structure reveals that the putative active-site motif CGFS is well defined and is located on the molecular surface and that a long groove extends to both sides of the catalytic Cys97. Structural comparison and molecular modeling suggest that glutathione can bind in this groove and form extensive interactions with conserved charged residues including Lys89, Arg126 and Asp152. Further comparative studies reveal that a unique loop with five additional residues adjacent to the active-site motif may be a key structural feature of monothiol Grxs and may influence their function. This study provides the first structural information on plant CGFS-type monothiol Grxs, allowing a better understanding of the redox-regulation mechanism mediated by these plant Grxs.


    Organizational Affiliation

    Plant Biology Division, Samuel Roberts Noble Foundation, 2510 Sam Noble Parkway, Ardmore, Oklahoma 73401, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Monothiol glutaredoxin-S14, chloroplasticA109Arabidopsis thalianaMutation(s): 0 
Gene Names: GRXS14CXIP1At3g54900F28P10.120GRX5PGRXCP
Find proteins for Q84Y95 (Arabidopsis thaliana)
Explore Q84Y95 
Go to UniProtKB:  Q84Y95
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.191 
  • Space Group: P 3 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.404α = 90
b = 81.404β = 90
c = 55.438γ = 120
Software Package:
Software NamePurpose
CrystalCleardata collection
PHASERphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-06-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance