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Solution structure of HERG-specific scorpion toxin BeKm-1
SOLUTION NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
DQF-COSY
1 mM BeKm-1, 90% H2O, 10% D2O
90% H2O/10% D2O
0
3.5
ambient
303
2
2D TOCSY
1 mM BeKm-1, 90% H2O, 10% D2O
90% H2O/10% D2O
0
3.5
ambient
303
3
2D NOESY
1 mM BeKm-1, 90% H2O, 10% D2O
90% H2O/10% D2O
0
3.5
ambient
303
4
DQF-COSY
1 mM BeKm-1
99.9% D2O
0
3.5
ambient
303
5
2D TOCSY
1 mM BeKm-1
99.9% D2O
0
3.5
ambient
303
6
2D NOESY
1 mM BeKm-1
99.9% D2O
0
3.5
ambient
303
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Varian
UNITY
600
NMR Refinement
Method
Details
Software
simulated annealing combined with torsion angle dynamics
The structures are based on a total of 653 restraints:
326/67 are NOE-derived upper/lower distance constraints,
68/46 backbone/sidechain dihedral angle restraints,
64/64 upper/lower distance restraints from 23 (18 bb-bb, 5 bb-sc) hydrogen bonds,
9/9 upper/lower distance restraints from 3 SS-bonds.
VNMR
NMR Ensemble Information
Conformer Selection Criteria
Conformers Calculated Total Number
Conformers Submitted Total Number
1
Additional NMR Experimental Information
Details
This structure was determined using standard 2D homonuclear techniques.