4WWF

High-resolution structure of two Ni-bound forms of the M123C mutant of C. metallidurans CnrXs


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.1 Å
  • R-Value Free: 0.145 
  • R-Value Work: 0.115 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Response of CnrX from Cupriavidus metallidurans CH34 to nickel binding.

Maillard, A.P.Kunnemann, S.Groe, C.Volbeda, A.Schleuder, G.Petit-Hartlein, I.de Rosny, E.Nies, D.H.Coves, J.

(2015) Metallomics 7: 622-631

  • DOI: 10.1039/c4mt00293h
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Resistance to high concentration of nickel ions is mediated in Cupriavidus metallidurans by the CnrCBA transenvelope efflux complex. Expression of the cnrCBA genes is regulated by the transmembrane signal transduction complex CnrYXH. Together, the me ...

    Resistance to high concentration of nickel ions is mediated in Cupriavidus metallidurans by the CnrCBA transenvelope efflux complex. Expression of the cnrCBA genes is regulated by the transmembrane signal transduction complex CnrYXH. Together, the metal sensor CnrX and the transmembrane antisigma factor CnrY control the availability of the extracytoplasmic function sigma factor CnrH. Release of CnrH from sequestration by CnrY at the cytoplasmic side of the membrane depends essentially on the binding of the agonist metal ion Ni(ii) to the periplasmic metal sensor domain of CnrX. CnrH availability leads to transcription initiation at the promoters cnrYp and cnrCp and to the expression of the genes in the cnrYXHCBA nickel resistance determinant. The first steps of signal propagation by CnrX rely on subtle metal-dependent allosteric modifications. To study the nickel-mediated triggering process by CnrX, we have altered selected residues, F66, M123, and Y135, and explored the physiological consequences of these changes with respect to metal resistance, expression of a cnrCBA-lacZ reporter fusion and protein production. M123C- and Y135F-CnrXs have been further characterized in vitro by metal affinity measurements and crystallographic structure analysis. Atomic-resolution structures of metal-bound M123C- and Y135F-CnrXs showed that Ni(ii) binds two of the three canonical conformations identified and that Ni(ii) sensing likely proceeds by conformation selection.


    Organizational Affiliation

    Institut de Biologie Structurale, UMR 5075 CNRS-CEA-Université Grenoble-Alpes, 71, Avenue des Martyrs, 38044 Grenoble Cedex 9, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Nickel and cobalt resistance protein CnrR
A, B
118Cupriavidus metallidurans (strain ATCC 43123 / DSM 2839 / NBRC 102507 / CH34)Mutation(s): 1 
Gene Names: cnrR (cnrX)
Find proteins for P37975 (Cupriavidus metallidurans (strain ATCC 43123 / DSM 2839 / NBRC 102507 / CH34))
Go to UniProtKB:  P37975
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
B
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
NI
Query on NI

Download SDF File 
Download CCD File 
A, B
NICKEL (II) ION
Ni
VEQPNABPJHWNSG-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.1 Å
  • R-Value Free: 0.145 
  • R-Value Work: 0.115 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 43.910α = 90.00
b = 47.520β = 90.00
c = 193.740γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-02-11
    Type: Initial release