SOLUTION NMR Experimental Data

Experimental Details
Sample Conditions
Sample Contents5 mM peptide, unbuffered
Solvent90% H2O, 10% D2O
Ionic Strength0
Pressure1 atm
Temperature (K)293
Experiment(s):DQF-COSY, 2D TOCSY, 2D ROESY
Sample Contents5 mM peptide, unbuffered
Solvent100% D2O
Ionic Strength0
Pressure1 atm
Temperature (K)293
Experiment(s):2D ROESY, 2D COSY-35
Spectrometer Information
Manufacturer Model Field Strength
Bruker DRX 500.0
NMR Refinement
Method Distance geometry and restrained molecular dynamics with chemical shift refinement
Details 100 structures were calculated using distance geometry. The 80 structures of lowest penalty function were refined using the Sander module of AMBER (v6.0). The calculation employed 72 distance restraints, 11 dihedral angle restraints and 8 chemical shift restraints. The 20 structures of lowest violation energy were chosen to represent the structure. There are no violations of the input restraints > 0.1 A or 2 degrees. The rms. difference between calculation and observed chemical shifts is 0.07 ppm. 78% of the backbone geometries are in the most favourable region ofthe Ramachandran plot. The backbone heavy atom rmsd from the mean structure is 0.29+/-0.05 A.
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 Resonance assignments were made using standard 2D homonuclear techniques
Computation: NMR Software
# Classification Software Name Author
1 structure solution AMBER 6.0 n/a
2 refinement AMBER 6.0 Case, Kollman et al.
3 structure solution DGII 980 Tim Havel
4 data analysis FELIX 980 accelrys
5 collection XWINNMR 3.1 bruker