1UXL

I113T mutant of human SOD1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.170 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Dimer Destabilization in Superoxide Dismutase May Result in Disease-Causing Properties: Structures of Motor Neuron Disease Mutants

Hough, M.A.Grossmann, J.G.Antonyuk, S.V.Strange, R.W.Doucette, P.A.Rodriguez, J.A.Whitson, L.J.Hart, P.J.Hayward, L.J.Valentine, J.S.Hasnain, S.S.

(2004) Proc.Natl.Acad.Sci.USA 101: 5976

  • DOI: 10.1073/pnas.0305143101
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • More than 90 point mutations in human CuZn superoxide dismutase lead to the development of familial amyotrophic lateral sclerosis, known also as motor neuron disease. A growing body of evidence suggests that a subset of mutations located close to the ...

    More than 90 point mutations in human CuZn superoxide dismutase lead to the development of familial amyotrophic lateral sclerosis, known also as motor neuron disease. A growing body of evidence suggests that a subset of mutations located close to the dimeric interface can lead to a major destabilization of the mutant enzymes. We have determined the crystal structures of the Ala4Val (A4V) and Ile113Thr (I113T) mutants to 1.9 and 1.6 A, respectively. In the A4V structure, small changes at the dimer interface result in a substantial reorientation of the two monomers. This effect is also seen in the case of the I113T crystal structure, but to a smaller extent. X-ray solution scattering data show that in the solution state, both of the mutants undergo a more pronounced conformational change compared with wild-type superoxide dismutase (SOD) than that observed in the A4V crystal structure. Shape reconstructions from the x-ray scattering data illustrate the nature of this destabilization. Comparison of these scattering data with those for bovine CuZn SOD measured at different temperatures shows that an analogous change in the scattering profile occurs for the bovine enzyme in the temperature range of 70-80 degrees C. These results demonstrate that the A4V and I113T mutants are substantially destabilized in comparison with wild-type SOD1, and it is possible that the pathogenic properties of this subset of familial amyotrophic lateral sclerosis mutants are at least in part due to this destabilization.


    Organizational Affiliation

    Molecular Biophysics Group, Council for the Central Laboratory of the Research Councils, Daresbury Laboratory, Warrington, Cheshire WA4 4AD, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SUPEROXIDE DISMUTASE [CU-ZN]
A, B, C, D, E, F, G, H, I, J
153Homo sapiensMutation(s): 1 
Gene Names: SOD1
EC: 1.15.1.1
Find proteins for P00441 (Homo sapiens)
Go to Gene View: SOD1
Go to UniProtKB:  P00441
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H, I, J
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C, D, E, F, H, I
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CU
Query on CU

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H, I, J
COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.170 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 166.042α = 90.00
b = 203.546β = 90.00
c = 144.021γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-03-19
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Refinement description, Version format compliance