1K0V

Copper trafficking: the solution structure of Bacillus subtilis CopZ


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 30 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Copper trafficking: the solution structure of Bacillus subtilis CopZ.

Banci, L.Bertini, I.Del Conte, R.Markey, J.Ruiz-Duenas, F.J.

(2001) Biochemistry 40: 15660-15668


  • PubMed Abstract: 
  • A sequence with a high homology (39% residue identity) with that of the copper-transport CopZ protein from Enterococcus hirae and with the same MXCXXC metal-binding motif has been identified in the genome of Bacillus subtilis, and the corresponding p ...

    A sequence with a high homology (39% residue identity) with that of the copper-transport CopZ protein from Enterococcus hirae and with the same MXCXXC metal-binding motif has been identified in the genome of Bacillus subtilis, and the corresponding protein has been expressed. The protein, constituted by 73 amino acids, does bind copper(I) under reducing conditions and fully folded in both copper-bound and copper-free forms under the present experimental conditions. The solution structure of the copper-bound form was determined through NMR spectroscopy on an 15N-labeled sample. A total of 1508 meaningful nuclear Overhauser effects, 38 dihedral phi angles, and 48 dihedral psi angles were used in the structural calculations, which lead to a family of 30 conformers with an average rmsd to the mean structure of 0.32 +/- 0.06 A for the backbone and of 0.85 +/- 0.07 A for the heavy atoms. NMR data on the apoprotein also show that, also in this form, the protein is in a folded state and essentially maintains the complete secondary structure. Some disorder is observed in the loop devoted to copper binding. These results are compared with those reported for CopZ from E. hirae whose structure is well-defined only in the apo form. The different behaviors of copper-loaded E. hirae and B. subtilis are tentatively accounted for on the basis of the presence of dithiothreitol used in the latter case, which would stabilize the monomeric form. The comparison is extended to other similar proteins, with particular attention to the copper-binding loop. The nature and the location of conserved residues around the metal-binding site are discussed with respect to their relevance for the metal-binding process. Proposals for the role of CopZ are also presented.


    Organizational Affiliation

    Centro di Risonanze Magnetiche and Department of Chemistry, University of Florence, Via Luigi Sacconi 6, 50019 Sesto Fiorentino, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CopZ
A
73Bacillus subtilis (strain 168)Mutation(s): 0 
Gene Names: copZ (yvgY)
Find proteins for O32221 (Bacillus subtilis (strain 168))
Go to UniProtKB:  O32221
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CU1
Query on CU1

Download SDF File 
Download CCD File 
A
COPPER (I) ION
Cu
VMQMZMRVKUZKQL-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 30 
  • Olderado: 1K0V Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-12-19
    Type: Initial release
  • Version 1.1: 2007-10-10
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance