Copper transporter OprC

Experimental Data Snapshot

  • Resolution: 1.97 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.211 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Acquisition of ionic copper by the bacterial outer membrane protein OprC through a novel binding site.

Bhamidimarri, S.P.Young, T.R.Shanmugam, M.Soderholm, S.Basle, A.Bumann, D.van den Berg, B.

(2021) PLoS Biol 19: e3001446-e3001446

  • DOI: https://doi.org/10.1371/journal.pbio.3001446
  • Primary Citation of Related Structures:  
    6FOK, 6FOM, 6Z8Q, 6Z8R, 6Z8S, 6Z8T, 6Z8U, 6Z8Y, 6Z8Z, 6Z91, 6Z99, 6Z9N, 6Z9Y

  • PubMed Abstract: 

    Copper, while toxic in excess, is an essential micronutrient in all kingdoms of life due to its essential role in the structure and function of many proteins. Proteins mediating ionic copper import have been characterised in detail for eukaryotes, but much less so for prokaryotes. In particular, it is still unclear whether and how gram-negative bacteria acquire ionic copper. Here, we show that Pseudomonas aeruginosa OprC is an outer membrane, TonB-dependent transporter that is conserved in many Proteobacteria and which mediates acquisition of both reduced and oxidised ionic copper via an unprecedented CxxxM-HxM metal binding site. Crystal structures of wild-type and mutant OprC variants with silver and copper suggest that acquisition of Cu(I) occurs via a surface-exposed "methionine track" leading towards the principal metal binding site. Together with whole-cell copper quantitation and quantitative proteomics in a murine lung infection model, our data identify OprC as an abundant component of bacterial copper biology that may enable copper acquisition under a wide range of conditions.

  • Organizational Affiliation

    Biosciences Institute, The Medical School, Newcastle University, Newcastle upon Tyne, United Kingdom.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Putative copper transport outer membrane porin OprC
A, B
723Pseudomonas aeruginosa PAO1Mutation(s): 0 
Gene Names: oprCPA3790
Membrane Entity: Yes 
Find proteins for G3XD89 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore G3XD89 
Go to UniProtKB:  G3XD89
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupG3XD89
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on C8E

Download Ideal Coordinates CCD File 
D [auth A]
E [auth A]
F [auth A]
G [auth A]
I [auth B]
D [auth A],
E [auth A],
F [auth A],
G [auth A],
I [auth B],
J [auth B],
K [auth B],
L [auth B],
M [auth B],
N [auth B],
O [auth B],
P [auth B]
C16 H34 O5
CU (Subject of Investigation/LOI)
Query on CU

Download Ideal Coordinates CCD File 
C [auth A],
H [auth B]
Experimental Data & Validation

Experimental Data

  • Resolution: 1.97 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.211 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 156.37α = 90
b = 196.72β = 90
c = 166.35γ = 90
Software Package:
Software NamePurpose
xia2data reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-03-13
    Type: Initial release
  • Version 1.1: 2020-07-22
    Type: Coordinate replacement
    Reason: Ligand identity
    Changes: Author supporting evidence, Data collection, Database references, Derived calculations, Refinement description, Source and taxonomy, Structure summary
  • Version 1.2: 2021-12-01
    Changes: Database references