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The solution structure of the squash aspartic acid proteinase inhibitor (SQAPI)
NMR Experiment Experiment Type Sample Contents Solvent Ionic Strength pH Pressure Temperature (K) Spectrometer 1 2D 1H-15N HSQC 0.6mM [U-98% 13C; U-98% 15N] SQAPI-1 90% H2O/10% D2O 3 ambient 323 2 2D 1H-13C HSQC 0.6mM [U-98% 13C; U-98% 15N] SQAPI-1 90% H2O/10% D2O 3 ambient 323 3 2D 1H-1H NOESY 0.6mM [U-98% 13C; U-98% 15N] SQAPI-1 90% H2O/10% D2O 3 ambient 323 4 3D HNCACB 0.6mM [U-98% 13C; U-98% 15N] SQAPI-1 90% H2O/10% D2O 3 ambient 323 5 3D HNCA 0.6mM [U-98% 13C; U-98% 15N] SQAPI-1 90% H2O/10% D2O 3 ambient 323 6 3D HNCO 0.6mM [U-98% 13C; U-98% 15N] SQAPI-1 90% H2O/10% D2O 3 ambient 323 7 3D HN(CA)CO 0.6mM [U-98% 13C; U-98% 15N] SQAPI-1 90% H2O/10% D2O 3 ambient 323 8 3D HN(COCA)CB 0.6mM [U-98% 13C; U-98% 15N] SQAPI-1 90% H2O/10% D2O 3 ambient 323 9 3D HCCCONH TOCSY 0.6mM [U-98% 13C; U-98% 15N] SQAPI-1 90% H2O/10% D2O 3 ambient 323 10 3D HBHA(CO)NH 0.6mM [U-98% 13C; U-98% 15N] SQAPI-1 90% H2O/10% D2O 3 ambient 323 11 3D HCCH-TOCSY 0.6mM [U-98% 13C; U-98% 15N] SQAPI-1 90% H2O/10% D2O 3 ambient 323 12 2D (HB)CB(CGCD)HD 0.6mM [U-98% 13C; U-98% 15N] SQAPI-1 90% H2O/10% D2O 3 ambient 323 13 2D (HB)CB(CGCDCE)HE 0.6mM [U-98% 13C; U-98% 15N] SQAPI-1 90% H2O/10% D2O 3 ambient 323 14 3D 1H-13C NOESYHSQC 0.6mM [U-98% 13C; U-98% 15N] SQAPI-1 90% H2O/10% D2O 3 ambient 323 15 3D 1H-15N NOESYHSQC 0.6mM [U-98% 13C; U-98% 15N] SQAPI-1 90% H2O/10% D2O 3 ambient 323
NMR Spectrometer Information Spectrometer Manufacturer Model Field Strength 1 Bruker AVANCE 700
NMR Refinement Method Details Software torsion angle dynamics, simulated annealing, simulated annealing beginning with extended conformer, beginning with folded structure using Cartesian dynamics, final refinement using Cartesian dynamics in a layer of TIP3 water molecules TopSpin
NMR Ensemble Information Conformer Selection Criteria structures with the lowest energy Conformers Calculated Total Number 100 Conformers Submitted Total Number 10 Representative Model 1 (lowest energy)
Computation: NMR Software # Classification Version Software Name Author 1 processing TopSpin 2.0 Bruker Biospin 2 data analysis XEASY 1.4 Bartels et al. 3 refinement CNS