Crystal structure of the high-affinity copper transporter Ctr1

Experimental Data Snapshot

  • Resolution: 3.03 Å
  • R-Value Free: 0.332 
  • R-Value Work: 0.280 
  • R-Value Observed: 0.285 

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This is version 1.3 of the entry. See complete history


X-ray structures of the high-affinity copper transporter Ctr1.

Ren, F.Logeman, B.L.Zhang, X.Liu, Y.Thiele, D.J.Yuan, P.

(2019) Nat Commun 10: 1386-1386

  • DOI: https://doi.org/10.1038/s41467-019-09376-7
  • Primary Citation of Related Structures:  
    6M97, 6M98

  • PubMed Abstract: 

    Copper (Cu) is an essential trace element for growth and development and abnormal Cu levels are associated with anemia, metabolic disease and cancer. Evolutionarily conserved from fungi to humans, the high-affinity Cu + transporter Ctr1 is crucial for both dietary Cu uptake and peripheral distribution, yet the mechanisms for selective permeation of potentially toxic Cu + ions across cell membranes are unknown. Here we present X-ray crystal structures of Ctr1 from Salmo salar in both Cu + -free and Cu + -bound states, revealing a homo-trimeric Cu + -selective ion channel-like architecture. Two layers of methionine triads form a selectivity filter, coordinating two bound Cu + ions close to the extracellular entrance. These structures, together with Ctr1 functional characterization, provide a high resolution picture to understand Cu + import across cellular membranes and suggest therapeutic opportunities for intervention in diseases characterized by inappropriate Cu accumulation.

  • Organizational Affiliation

    Department of Cell Biology and Physiology, Washington University School of Medicine, Saint Louis, MO, 63110, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Chimera protein of High affinity copper uptake protein 1 and Soluble cytochrome b562234Salmo salarEscherichia coliMutation(s): 3 
Gene Names: COPT1copt1cybC
Membrane Entity: Yes 
Find proteins for P0ABE7 (Escherichia coli)
Explore P0ABE7 
Go to UniProtKB:  P0ABE7
Find proteins for C0HAK2 (Salmo salar)
Explore C0HAK2 
Go to UniProtKB:  C0HAK2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsC0HAK2P0ABE7
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.03 Å
  • R-Value Free: 0.332 
  • R-Value Work: 0.280 
  • R-Value Observed: 0.285 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.85α = 90
b = 73.85β = 90
c = 410.58γ = 120
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-04-03
    Type: Initial release
  • Version 1.1: 2019-04-10
    Changes: Data collection, Database references
  • Version 1.2: 2019-12-04
    Changes: Author supporting evidence
  • Version 1.3: 2024-03-13
    Changes: Data collection, Database references