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Structure of the Plant Defensin PhD1 from Petunia Hybrida
SOLUTION NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
2D NOESY
0.94mM 1H-PhD1
90% H2O/10% D2O
0.94mM
3.1
ambient
310
2
DQF-COSY
0.94mM 1H-PhD1
90% H2O/10% D2O
0.94mM
3.1
ambient
310
3
2D NOESY
0.94mM 1H-PhD1
99% D2O, 1% H2O
0.94mM
3.1
ambient
310
4
E-COSY
0.94mM 1H-PhD1
99% D2O, 1% H2O
0.94mM
3.1
ambient
310
5
2D NOESY
0.94mM 1H-PhD1
90% H2O/10% D2O
0.94mM
3.1
ambient
280
6
DQF-COSY
0.94mM 1H-PhD1
90% H2O/10% D2O
0.94mM
3.1
ambient
280
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Bruker
DMX
750
NMR Refinement
Method
Details
Software
Torsion angle simulated annealing protocol, incorporated in CNS.
Refinement in a box with explicit water molecules using the method of Linge & Nilges (1999)
The structures are based on 407 NOE-derived inter-residual distance constraints,
26 phi- and 28 chi1- angle constraints, and 30 distance constraints for 15 hydrogen bonds.
XwinNMR
NMR Ensemble Information
Conformer Selection Criteria
structures with the least restraint violations,structures with the lowest energy
Conformers Calculated Total Number
50
Conformers Submitted Total Number
20
Representative Model
19 (lowest energy)
Additional NMR Experimental Information
Details
This structure was determined using standard 2D homonuclear techniques.