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Solution structure of the Ras-binding domain of the Ral Guanosine Dissociation Stimulator
SOLUTION NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
2D NOESY
20 mM potassium buffer at ph 7.0, 2 mM dithioerythritol (DTE),
0.5 mM EDTA, 0.5 mM NaN3, 0.1 mM
2,2-dimethyl-2-silapentane sulfonic acid (DSS)
1.0 mM RalGDS-RBD non labeled
95% H2O/5% D2O (v/v)
20 mM potassium buffer
7.0
ambient
298
2
3D_15N-separated_NOESY
20 mM potassium buffer at ph 7.0, 2 mM dithioerythritol (DTE),
0.5 mM EDTA, 0.5 mM NaN3, 0.1 mM
2,2-dimethyl-2-silapentane sulfonic acid (DSS)
2.9 mM RalGDS-RBD 15N/13C labeled
95% H2O/5% D2O (v/v)
20 mM potassium buffer
7.0
ambient
298
3
2D NOESY
20 mM potassium buffer at ph 7.0, 2 mM dithioerythritol (DTE),
0.5 mM EDTA, 0.5 mM NaN3, 0.1 mM
2,2-dimethyl-2-silapentane sulfonic acid (DSS)
1.0 mM RalGDS-RBD non labeled
100% D2O
20 mM potassium buffer
7.0
ambient
298
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Bruker
DMX
800
2
Bruker
DMX
600
NMR Refinement
Method
Details
Software
simulated annealing first in torsion angle space followed by simulated annealing in cartesian space. Final refinement in explicit solvent (H2O).
The structures are based on a total of 1680 restraints, 1550 are NOE-derived
distance constraints, 104 dihedral angle restraints,26 distance restraints
from hydrogen bonds.
XwinNMR
NMR Ensemble Information
Conformer Selection Criteria
structures with the lowest energy
Conformers Calculated Total Number
300
Conformers Submitted Total Number
10
Representative Model
1 (lowest energy)
Additional NMR Experimental Information
Details
sequential assignment bassed on triple resonance spectra, 2D 1H TOCSY, 3D 15N edited TOCSY, 3D 13C edited TOCSY