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 
  • R-Value Observed: 0.186 

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:  
    6FN8, 6FP6, 6FOI, 6FOL, 6FON

  • 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 pathway can be catalysed through a direct interaction with the copper chaperone for SOD1 (CCS) ...

    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

    Molecular Biophysics Group, Institute of Integrative Biology, Faculty of Health and Life Sciences, University of Liverpool, Liverpool, United Kingdom.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Copper chaperone for superoxide dismutaseA, B152Homo sapiensMutation(s): 0 
Gene Names: CCS
UniProt & NIH Common Fund Data Resources
Find proteins for O14618 (Homo sapiens)
Explore O14618 
Go to UniProtKB:  O14618
PHAROS:  O14618
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download Ideal Coordinates CCD File 
C [auth A], D [auth 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 
  • R-Value Observed: 0.186 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 68.359α = 90
b = 68.359β = 90
c = 136.18γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report




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  (Full details and data files)

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