Crystal structure of Mxr1 from Saccharomyces cerevisiae in unusual oxidized form

Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.238 

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Structural plasticity of the thioredoxin recognition site of yeast methionine S-sulfoxide reductase Mxr1

Ma, X.X.Guo, P.C.Shi, W.W.Luo, M.Tan, X.F.Chen, Y.Zhou, C.Z.

(2011) J Biol Chem 286: 13430-13437

  • DOI: https://doi.org/10.1074/jbc.M110.205161
  • Primary Citation of Related Structures:  
    3PIL, 3PIM, 3PIN

  • PubMed Abstract: 

    The methionine S-sulfoxide reductase MsrA catalyzes the reduction of methionine sulfoxide, a ubiquitous reaction depending on the thioredoxin system. To investigate interactions between MsrA and thioredoxin (Trx), we determined the crystal structures of yeast MsrA/Mxr1 in their reduced, oxidized, and Trx2-complexed forms, at 2.03, 1.90, and 2.70 Å, respectively. Comparative structure analysis revealed significant conformational changes of the three loops, which form a plastic "cushion" to harbor the electron donor Trx2. The flexible C-terminal loop enabled Mxr1 to access the methionine sulfoxide on various protein substrates. Moreover, the plasticity of the Trx binding site on Mxr1 provides structural insights into the recognition of diverse substrates by a universal catalytic motif of Trx.

  • Organizational Affiliation

    Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230027, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Peptide methionine sulfoxide reductase
A, B, C
187Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: MXR1
Find proteins for P40029 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P40029 
Go to UniProtKB:  P40029
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP40029
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.238 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 111.894α = 90
b = 111.894β = 90
c = 108.124γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
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: 2011-02-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2014-04-09
    Changes: Database references
  • Version 1.3: 2023-11-01
    Changes: Data collection, Database references, Refinement description