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Solution structure of an acyclic permutant of SFTI-1, A trypsin inhibitor from sunflower seeds
NMR Experiment Experiment Type Sample Contents Solvent Ionic Strength pH Pressure Temperature (K) Spectrometer 1 2D NOESY 1mM 14/1-lSFTI-1 20mM sodium phosphate, pH4.5,
20% trifluoroethanol,
10%D2O 20mM 4.5 ambient 273 2 DQF-COSY 1mM 14/1-lSFTI-1 20mM sodium phosphate, pH4.5,
20% trifluoroethanol,
10%D2O 20mM 4.5 ambient 273 3 2D NOESY 1mM 14/1-lSFTI-1 20mM sodium phosphate, pH4.5,
20% trifluoroethanol,
80%D2O 20mM 4.5 ambient 273 4 E-COSY 1mM 14/1-lSFTI-1 20mM sodium phosphate, pH4.5,
20% trifluoroethanol,
80%D2O 20mM 4.5 ambient 273
NMR Spectrometer Information Spectrometer Manufacturer Model Field Strength 1 Bruker DMX 750 2 Bruker ARX 500
NMR Refinement Method Details Software simulated annealing
and refinement with modified CSDX force field 162 distance constraints,
73 sequential,
18 medium range,
68 long range,
6 chi1 angle constraints,
7 phi angle constraints XwinNMR
NMR Ensemble Information Conformer Selection Criteria structures with the least restraint violations,structures with the lowest energy Conformers Calculated Total Number 50 Conformers Submitted Total Number 20
Additional NMR Experimental Information Details This structure was determined using standard 2D homonuclear techniques.
Computation: NMR Software # Classification Version Software Name Author 1 collection XwinNMR 2.6 Bruker 2 processing XwinNMR 2.6 Bruker 3 data analysis CCNMR Cieslar et al. 4 structure solution X-PLOR 3.851 Brunger 5 refinement X-PLOR 3.851 Brunger