6FN8

Domain II of the HUMAN COPPER CHAPERONE FOR SUPEROXIDE DISMUTASE at 1.55 A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Molecular recognition and maturation of SOD1 by its evolutionarily destabilised cognate chaperone hCCS.

Sala, F.A.Wright, G.S.A.Antonyuk, S.V.Garratt, R.C.Hasnain, S.S.

(2019) Plos Biol. 17: e3000141-e3000141

  • DOI: 10.1371/journal.pbio.3000141
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Superoxide dismutase-1 (SOD1) maturation comprises a string of posttranslational modifications which transform the nascent peptide into a stable and active enzyme. The successive folding, metal ion binding, and disulphide acquisition steps in this pa ...

    Superoxide dismutase-1 (SOD1) maturation comprises a string of posttranslational modifications which transform the nascent peptide into a stable and active enzyme. The successive folding, metal ion binding, and disulphide acquisition steps in this pathway can be catalysed through a direct interaction with the copper chaperone for SOD1 (CCS). This process confers enzymatic activity and reduces access to noncanonical, aggregation-prone states. Here, we present the functional mechanisms of human copper chaperone for SOD1 (hCCS)-catalysed SOD1 activation based on crystal structures of reaction precursors, intermediates, and products. Molecular recognition of immature SOD1 by hCCS is driven by several interface interactions, which provide an extended surface upon which SOD1 folds. Induced-fit complexation is reliant on the structural plasticity of the immature SOD1 disulphide sub-loop, a characteristic which contributes to misfolding and aggregation in neurodegenerative disease. Complexation specifically stabilises the SOD1 disulphide sub-loop, priming it and the active site for copper transfer, while delaying disulphide formation and complex dissociation. Critically, a single destabilising amino acid substitution within the hCCS interface reduces hCCS homodimer affinity, creating a pool of hCCS available to interact with immature SOD1. hCCS substrate specificity, segregation between solvent and biological membranes, and interaction transience are direct results of this substitution. In this way, hCCS-catalysed SOD1 maturation is finessed to minimise copper wastage and reduce production of potentially toxic SOD1 species.


    Organizational Affiliation

    Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, Brazil.,Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, Brazil.,Molecular Biophysics Group, Institute of Integrative Biology, Faculty of Health and Life Sciences, University of Liverpool, Liverpool, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Copper chaperone for superoxide dismutase
A, B
152Homo sapiensMutation(s): 0 
Gene Names: CCS
Find proteins for O14618 (Homo sapiens)
Go to Gene View: CCS
Go to UniProtKB:  O14618
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.185 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 68.359α = 90.00
b = 68.359β = 90.00
c = 136.180γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
MOSFLMdata reduction
MOLREPphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Motor Neurone Disease AssociationUnited KingdomHasnain/Apr15/833-791
Medical Research Council (United Kingdom)United KingdomMRF-060-0002-RG-HASNA
Sao Paulo Research FundationBrazil2015/00062-1
Sao Paulo Research FundationBrazil2016/24686-7

Revision History 

  • Version 1.0: 2019-01-30
    Type: Initial release
  • Version 1.1: 2019-06-19
    Type: Data collection, Database references