SOLUTION NMR Experimental Data

Experimental Details
Sample Conditions
Sample Contents5 mM peptide, unbuffered at pH 5.0
Solvent90% H2O, 10% D2O
Ionic Strength0
Pressure1 atm
Temperature (K)288
Experiment(s):DQF-COSY, 2D TOCSY, 2D ROESY
Sample Contents5 mM peptide, unbuffered at pH 5.0
Solvent100% D2O
Ionic Strength0
Pressure1 atm
Temperature (K)288
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 restraints.
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 79 distance restraints, 12 dihedral angle restraints and 13 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 0.09 ppm. 79% of the backbone geometries are in the most favourable region of the Ramachandran plot. The backbone heavy atom rmsd from the mean structure is 0.39+/-0.08 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 Chemical shift assignments were determined using standard 2D homonuclear techniques.
Computation: NMR Software
# Classification Software Name Author
1 structure solution AMBER 6.O n/a
2 refinement AMBER 6.0 Case, Kollman, ET. AL.
3 structure solution DGII 980 Tim Havel
4 data analysis FELIX 980 bruker
5 collection XWINNMR 3.1 bruker