5U9M

Copper-Zinc Superoxide Dismutase is Activated through a Sulfenic Acid Intermediate at a Copper-ion Entry Site


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Copper-zinc superoxide dismutase is activated through a sulfenic acid intermediate at a copper ion entry site.

Fetherolf, M.M.Boyd, S.D.Taylor, A.B.Kim, H.J.Wohlschlegel, J.A.Blackburn, N.J.Hart, P.J.Winge, D.R.Winkler, D.D.

(2017) J. Biol. Chem. 292: 12025-12040

  • DOI: 10.1074/jbc.M117.775981

  • PubMed Abstract: 
  • Metallochaperones are a diverse family of trafficking molecules that provide metal ions to protein targets for use as cofactors. The copper chaperone for superoxide dismutase (Ccs1) activates immature copper-zinc superoxide dismutase (Sod1) by delive ...

    Metallochaperones are a diverse family of trafficking molecules that provide metal ions to protein targets for use as cofactors. The copper chaperone for superoxide dismutase (Ccs1) activates immature copper-zinc superoxide dismutase (Sod1) by delivering copper and facilitating the oxidation of the Sod1 intramolecular disulfide bond. Here, we present structural, spectroscopic, and cell-based data supporting a novel copper-induced mechanism for Sod1 activation. Ccs1 binding exposes an electropositive cavity and proposed "entry site" for copper ion delivery on immature Sod1. Copper-mediated sulfenylation leads to a sulfenic acid intermediate that eventually resolves to form the Sod1 disulfide bond with concomitant release of copper into the Sod1 active site. Sod1 is the predominant disulfide bond-requiring enzyme in the cytoplasm, and this copper-induced mechanism of disulfide bond formation obviates the need for a thiol/disulfide oxidoreductase in that compartment.


    Organizational Affiliation

    From the Department of Medicine, University of Utah Health Sciences Center School of Medicine, Salt Lake City, Utah 84132-2408.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Superoxide dismutase [Cu-Zn]
A, C
153Homo sapiensGene Names: SOD1
EC: 1.15.1.1
Find proteins for P00441 (Homo sapiens)
Go to Gene View: SOD1
Go to UniProtKB:  P00441
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Superoxide dismutase 1 copper chaperone
B, D
248Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: CCS1 (LYS7)
Find proteins for P40202 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P40202
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.186 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 99.097α = 90.00
b = 184.353β = 90.00
c = 48.514γ = 90.00
Software Package:
Software NamePurpose
XDSdata scaling
MOLREPphasing
XDSdata reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-05-31
    Type: Initial release
  • Version 1.1: 2017-06-07
    Type: Database references
  • Version 1.2: 2017-08-02
    Type: Database references