1OSD

crystal structure of Oxidized MerP from Ralstonia metallidurans CH34


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.200 

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This is version 1.3 of the entry. See complete history


Literature

Crystal Structure of the Oxidized Form of the Periplasmic Mercury-binding Protein MerP from Ralstonia metallidurans CH34

Serre, L.Rossy, E.Pebay-Peyroula, E.Cohen-Addad, C.Coves, J.

(2004) J Mol Biol 339: 161-171

  • DOI: 10.1016/j.jmb.2004.03.022
  • Primary Citation of Related Structures:  
    1OSD

  • PubMed Abstract: 
  • In Ralstonia metallidurans CH34, the gene merP encodes for a periplasmic mercury-binding protein which is capable of binding one mercury atom. The metal-binding site of MerP consists of the highly conserved sequence GMTCXXC found in the family that includes metallochaperones and metal-transporting ATPases ...

    In Ralstonia metallidurans CH34, the gene merP encodes for a periplasmic mercury-binding protein which is capable of binding one mercury atom. The metal-binding site of MerP consists of the highly conserved sequence GMTCXXC found in the family that includes metallochaperones and metal-transporting ATPases. We purified MerP from R.metallidurans CH34 and solved its crystal structure under the oxidized form at 2.0A resolution. Superposition with structures of other metal-binding proteins shows that the global structure of R.metallidurans CH34 oxidized MerP follows the general topology of the whole family. The largest differences are observed with the NMR structure of oxidized Shigella flexneri MerP. Detailed analysis of the metal-binding site suggests a direct role for Y66 in stabilizing the thiolate group of C17 during the mercury-binding reaction. The metal-binding site of oxidized MerP is also similar to the metal-binding sites of oxidized copper chaperone for superoxide dismutase and Atx1, two copper-binding proteins from Saccharomyces cerevisiae. Finally, the packing of the MerP crystals suggests that F38, a well-conserved residue in the MerP family may be important in mercury binding and transfer. We propose a possible mechanism of mercury transfer between two CXXC motifs based on a transient bi-coordinated mercury intermediate.


    Organizational Affiliation

    Institut de Biologie Structurale, UMR 5075-CNRS-CEA-UJF/ IBS-LPM, 41 Avenue Jules Horowitz, 38027 Grenoble Cedex 01, France. laurence.serre@ibs.fr



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
hypothetical protein MerPA, B72Cupriavidus metalliduransMutation(s): 0 
Gene Names: MerP
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.200 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 43.81α = 90
b = 52.612β = 90
c = 60.006γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
CCP4data scaling
BEASTphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-05-18
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-07-04
    Changes: Data collection