2QCP

1.0 A Structure of CusF-Ag(I) residues 10-88 from Escherichia coli

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.00 Å
  • R-Value Free: 0.186 
  • R-Value Work: 0.159 
  • R-Value Observed: 0.160 

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This is version 1.1 of the entry. See complete history. 


Literature

Unusual Cu(I)/Ag(I) coordination of Escherichia coli CusF as revealed by atomic resolution crystallography and X-ray absorption spectroscopy

Loftin, I.R., Franke, S., Blackburn, N.J., McEvoy, M.M.

(2007) Protein Sci 16: 2287-2293

  • DOI: 10.1110/ps.073021307
  • Primary Citation of Related Structures:  
    2QCP

  • PubMed Abstract: 

    • Elevated levels of copper or silver ions in the environment are an immediate threat to many organisms. Escherichia coli is able to resist the toxic effects of these ions through strictly limiting intracellular levels of Cu(I) and Ag(I). The CusCFBA system is one system in E ...

    Elevated levels of copper or silver ions in the environment are an immediate threat to many organisms. Escherichia coli is able to resist the toxic effects of these ions through strictly limiting intracellular levels of Cu(I) and Ag(I). The CusCFBA system is one system in E. coli responsible for copper/silver tolerance. A key component of this system is the periplasmic copper/silver-binding protein, CusF. Here the X-ray structure and XAS data on the CusF-Ag(I) and CusF-Cu(I) complexes, respectively, are reported. In the CusF-Ag(I) structure, Ag(I) is coordinated by two methionines and a histidine, with a nearby tryptophan capping the metal site. EXAFS measurements on the CusF-Cu(I) complex show a similar environment for Cu(I). The arrangement of ligands effectively sequesters the metal from its periplasmic environment and thus may play a role in protecting the cell from the toxic ion.

    Organizational Affiliation: 

    Department of Biochemistry and Molecular Biophysics, University of Arizona, Tucson, Arizona 85721, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cation efflux system protein cusFA [auth X]80Escherichia coli str. K-12 substr. W3110Mutation(s): 0 
Gene Names: cusF, cusX
UniProt
Find proteins for P77214 (Escherichia coli (strain K12))
Explore P77214 
Go to UniProtKB:  P77214
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AG
Query on AG
Download Ideal Coordinates CCD File 
 F [auth X]SILVER ION
Ag
FOIXSVOLVBLSDH-UHFFFAOYSA-N		 Ligand Interaction
SO4
Query on SO4
Download Ideal Coordinates CCD File 
 C [auth X], E [auth X]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L		 Ligand Interaction
NO3
Query on NO3
Download Ideal Coordinates CCD File 
 B [auth X], D [auth X]NITRATE ION
N O3
NHNBFGGVMKEFGY-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.00 Å
  • R-Value Free: 0.186 
  • R-Value Work: 0.159 
  • R-Value Observed: 0.160 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 38.118α = 90
b = 39.351β = 90
c = 44.423γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
MOLREPphasing
REFMACrefinement
PDB_EXTRACTdata extraction
Blu-Icedata collection
CrystalCleardata reduction

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2007-06-19 
  • Released Date: 2007-10-02 
    • Deposition Author(s): Loftin, I.R.

Revision History  (Full details and data files)

  • Version 1.0: 2007-10-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Source and taxonomy, Version format compliance