6M97

Crystal structure of the high-affinity copper transporter Ctr1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.03 Å
  • R-Value Free: 0.332 
  • R-Value Work: 0.280 
  • R-Value Observed: 0.285 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

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: 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 ...

    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

    Center for the Investigation of Membrane Excitability Diseases, Washington University School of Medicine, Saint Louis, MO, 63110, USA. yuanp@wustl.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Chimera protein of High affinity copper uptake protein 1 and Soluble cytochrome b562A234Salmo salarEscherichia coliMutation(s): 3 
Gene Names: copt1cybC
Membrane Entity: Yes 
UniProt
Find proteins for P0ABE7 (Escherichia coli)
Explore P0ABE7 
Go to UniProtKB:  P0ABE7
Find proteins for C0HAK2 (Salmo salar)
Explore C0HAK2 
Go to UniProtKB:  C0HAK2
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TBR
Query on TBR

Download Ideal Coordinates CCD File 
B [auth A], C [auth A]HEXATANTALUM DODECABROMIDE
Br12 Ta6
YWYIQTPPCOBSGN-UHFFFAOYSA-M
 Ligand Interaction
ZN
Query on ZN

Download Ideal Coordinates CCD File 
D [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • 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
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

  • Deposited Date: 2018-08-22 
  • Released Date: 2019-04-03 
  • Deposition Author(s): Ren, F., Yuan, P.

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