Capturing the Conformational Ensemble of the Mixed Folded Polyglutamine Protein Ataxin-3.

Sicorello A, Różycki B, Konarev PV, Svergun DI, Pastore A, Structure (2020) Europe PMC

SASDJ47 – Polyglutamine protein ataxin-3 (Q13)

Ataxin-3 (polyglutamine protein ataxin-3 (Q13))
MWexperimental 42 kDa
MWexpected 41 kDa
VPorod 79 nm3
log I(s) 3.03×10-2 3.03×10-3 3.03×10-4 3.03×10-5
Ataxin-3 (polyglutamine protein ataxin-3 (Q13)) small angle scattering data  s, nm-1
ln I(s)
Ataxin-3 (polyglutamine protein ataxin-3 (Q13)) Guinier plot ln 3.04×10-2 Rg: 4.0 nm 0 (4.0 nm)-2 s2
(sRg)2I(s)/I(0)
Ataxin-3 (polyglutamine protein ataxin-3 (Q13)) Kratky plot 1.104 0 3 sRg
p(r)
Ataxin-3 (polyglutamine protein ataxin-3 (Q13)) pair distance distribution function Rg: 4.1 nm 0 Dmax: 14.1 nm

Data validation


Fits and models


log I(s)
 s, nm-1
Polyglutamine protein ataxin-3 (Q13) Rg histogram Rg, nm
Ataxin-3 (polyglutamine protein ataxin-3 (Q13)) EOM/RANCH model
Ataxin-3 (polyglutamine protein ataxin-3 (Q13)) EOM/RANCH model
Ataxin-3 (polyglutamine protein ataxin-3 (Q13)) EOM/RANCH model
Ataxin-3 (polyglutamine protein ataxin-3 (Q13)) EOM/RANCH model
Ataxin-3 (polyglutamine protein ataxin-3 (Q13)) EOM/RANCH model
Ataxin-3 (polyglutamine protein ataxin-3 (Q13)) EOM/RANCH model
Ataxin-3 (polyglutamine protein ataxin-3 (Q13)) EOM/RANCH model

Synchrotron SAXS data from solutions of polyglutamine protein ataxin-3 (Q13) in 20 mM sodium phosphate buffer, 2 mM TCEP, 5% glycerol, pH 6.5 were collected on the EMBL P12 beam line at PETRA III (DESY, Hamburg, Germany) using a Pilatus 6M detector at a sample-detector distance of 3 m and at a wavelength of λ = 0.124 nm (I(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). Solute concentrations ranging between 1.2 and 14.6 mg/ml were measured at 20°C. 20 successive 0.050 second frames were collected. The data were normalized to the intensity of the transmitted beam and radially averaged; the scattering of the solvent-blank was subtracted. The low angle data collected at lower concentration were merged with the highest concentration high angle data to yield the final composite scattering curve.

Ataxin-3 (polyglutamine protein ataxin-3 (Q13)) (ataxin-3 (Q13))
Mol. type   Protein
Organism   Homo sapiens
Olig. state   Monomer
Mon. MW   41.3 kDa
 
UniProt   P54252 (1-361)
Sequence   FASTA