SOLUTION NMR Experimental Data


Experimental Details
Sample Conditions
Sample Contents1 mM Peptide MBH12
Solvent90% H2O, 10% D2O
Ionic Strength0
pH5.0
Pressureambient
Temperature (K)283
Experiment(s):2D ROESY
Sample Contents1 mM Peptide MBH12
Solvent100% D2O
Ionic Strength0
pH5.0
Pressureambient
Temperature (K)283
Experiment(s):2D NOESY
Sample Contents1 mM Peptide MBH12
Solvent40% CD3OD, 60% H2O
Ionic Strength0
pH5.0
Pressureambient
Temperature (K)283
Experiment(s):2D NOESY
Spectrometer Information
Manufacturer Model Field Strength
Bruker DRX 500.0
NMR Refinement
Method simulated annealing combined with torsion angle dynamics (DYANA)
Details The structures are based on a total of 70 restraints, 60 are NOE-derived distance constraints and 10 dihedral angle restraints. The pairwise RMSD for residues 3-12 was 0.38 +/- 0.21 A for the backbone and 1.36 +/- 0.35 A for all heavy atoms. The estimated beta-hairpin population of this peptide is 66 +/- 4%. The first and last two residues (RG) are disordered, because they were added just to avoid aggregation. The side chains of Trp4, Tyr6, Ile9 and Tyr11 are interacting in one side of the beta hairpin, forming a hydrophobic cluster. Asn7 at position L1 of the beta-turn is directed outwards from the beta-hairpin, as expected for a type I' beta-turn.
NMR Ensemble Information
Conformer Selection Criteria structures with the lowest energy
Conformers Calculated Total Number 50
Conformers Submitted Total Number 10
Representative Model Choice Rationale
1 lower rmsd with respect to mean
Computation: NMR Software
# Classification Software Name Author
1 refinement GROMOS 96 van Gunsteren
2 structure solution DYANA 1.5 Guntert, P. et al.
3 data analysis XWINNMR 2.6 Bruker
4 collection XWINNMR 2.6 Bruker