SOLUTION NMR Experimental Data


Experimental Details
Sample Conditions
Sample Contents8 mM peptide
Solvent90% H2O/10% D2O
Ionic Strength0
pH5.1
Pressureambient
Temperature (K)290
Experiment(s):2D-ROESY, DQF-COSY
Sample Contents8 mM peptide
Solvent100% D2O
Ionic Strength0
pH5.1
Pressureambient
Temperature (K)290
Experiment(s):2D-ROESY, COSY-35
Spectrometer Information
Manufacturer Model Field Strength
Bruker Avance 500.0
NMR Refinement
Method distance geometry and restrained molecular dynamics
Details The structures are based on 70 NOE distance restraints, 8 phi and 3 chi-1 dihedral angle restraints. No hydrogen bond restraints were employed. Note that the Ha-Hb coupling constants indicate rotational averaging about the Phe4 chi-1 angle. Several NOEs to the aromatic ring of Phe4 were not used to generate restraints as they could be satisfied by a -60 or 180 degree rotamer, but not by both. The mean backbone atom RMSD to the mean structure within the disulfide cycle is 0.31 +/- 0.06 Angstoms.
NMR Ensemble Information
Conformer Selection Criteria structures with the least restraint violations
Conformers Calculated Total Number 80
Conformers Submitted Total Number 20
Representative Model Choice Rationale
1 closest to the average
Additional NMR Experimental Information
1 This structure was determined using standard 2D homonuclear techniques.
Computation: NMR Software
# Classification Software Name Author
1 structure solution version: 98.0 DGII Timothy Havel
2 refinement version: 3.1 DISCOVER Accelrys