Structure of the N-terminal Extension from Cupriavidus metallidurans CzcP

Experimental Data Snapshot

  • Resolution: 2.17 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.231 

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A new metal binding domain involved in cadmium, cobalt and zinc transport.

Smith, A.T.Barupala, D.Stemmler, T.L.Rosenzweig, A.C.

(2015) Nat Chem Biol 11: 678-684

  • DOI: https://doi.org/10.1038/nchembio.1863
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The P1B-ATPases, which couple cation transport across membranes to ATP hydrolysis, are central to metal homeostasis in all organisms. An important feature of P1B-ATPases is the presence of soluble metal binding domains (MBDs) that regulate transport activity. Only one type of MBD has been characterized extensively, but bioinformatics analyses indicate that a diversity of MBDs may exist in nature. Here we report the biochemical, structural and functional characterization of a new MBD from the Cupriavidus metallidurans P1B-4-ATPase CzcP (CzcP MBD). The CzcP MBD binds two Cd(2+), Co(2+) or Zn(2+) ions in distinct and unique sites and adopts an unexpected fold consisting of two fused ferredoxin-like domains. Both in vitro and in vivo activity assays using full-length CzcP, truncated CzcP and several variants indicate a regulatory role for the MBD and distinct functions for the two metal binding sites. Taken together, these findings elucidate a previously unknown MBD and suggest new regulatory mechanisms for metal transport by P1B-ATPases.

  • Organizational Affiliation

    1] Department of Molecular Biosciences, Northwestern University, Evanston, Illinois, USA. [2] Department of Chemistry, Northwestern University, Evanston, Illinois, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CzcP cation efflux P1-ATPase208Cupriavidus metallidurans CH34Mutation(s): 0 
Gene Names: czcPRmet_5970
Find proteins for Q1LAJ7 (Cupriavidus metallidurans (strain ATCC 43123 / DSM 2839 / NBRC 102507 / CH34))
Explore Q1LAJ7 
Go to UniProtKB:  Q1LAJ7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ1LAJ7
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.17 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.231 
  • Space Group: P 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.16α = 90
b = 58.16β = 90
c = 72.01γ = 90
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
xia2data scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-07-08
    Type: Initial release
  • Version 1.1: 2015-08-05
    Changes: Database references
  • Version 1.2: 2015-09-02
    Changes: Database references
  • Version 1.3: 2017-09-27
    Changes: Derived calculations, Refinement description
  • Version 1.4: 2023-12-27
    Changes: Data collection, Database references