SOLUTION NMR Experimental Data

Experimental Details
Sample Conditions
Sample Contents3 mM peptide
Solvent90% H2O, 10% D2O, pH 5.1
Ionic Strength0
Temperature (K)303
Experiment(s):2D-ROESY, 2D-NOESY, DQF-COSY
Sample Contents3 mM peptide
Solvent100 % D2O pH 5.1
Ionic Strength0
Temperature (K)303
Experiment(s):COSY-35, 2D-NOESY, 2D-ROESY
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 52 NOE distance restraints, 11 phi and 4 chi-1 dihedral angle restraints. No hydrogen bond restraints were employed. The mean backbone atom RMSD to the mean structure within the disulfide cycle is 0.43 +/- 0.12 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. The sample contains a mixture of cis and trans isomers about the Gly7-Pro8 peptide bond. Both sets of resonances were assigned. The trans isoform is not well ordered in solution. The cis isoform is structured, especially within the disulfide cycle. Structures were calculated on the basis of restraints generated only from the cis isoform.
Computation: NMR Software
# Classification Software Name Author
1 structure solution version: 98.0 DGII Timothy Havel
2 refinement version: 3.1 DISCOVER Accelrys