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Solution structure of the ribbon disulfide bond isomer of alpha-conotoxin AuIB
NMR Experiment Experiment Type Sample Contents Solvent Ionic Strength pH Pressure Temperature (K) Spectrometer 1 2D NOESY 2mM ribbon AuIB peptide 90% H2O/10% D2O 3.5 atmospheric atm 280 2 2D TOCSY 2mM ribbon AuIB peptide 90% H2O/10% D2O 3.5 atmospheric atm 280 3 DQF-COSY 2mM ribbon AuIB peptide 90% H2O/10% D2O 3.5 atmospheric atm 280 4 E-COSY 2mM ribbon AuIB peptide 100% D2O 3.5 atmospheric atm 280 5 2D NOESY 2mM ribbon AuIB peptide 100% D2O 3.5 atmospheric atm 280 6 2D TOCSY 2mM ribbon AuIB peptide 100% D2O 3.5 atmospheric atm 280
NMR Spectrometer Information Spectrometer Manufacturer Model Field Strength 1 Bruker DMX 750 2 Bruker ARX 500
NMR Refinement Method Details Software simulated annealing, molecular dynamics, energy minimisation in a CHARM force field 140 noe restraints were used including 4 long and 13 medium range noes, also 3 dihedral angles were included 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 Representative Model 7 (closest to the average)
Computation: NMR Software # Classification Version Software Name Author 1 collection XwinNMR 2.6 Bruker 2 processing XwinNMR 2.6 Bruker 3 refinement X-PLOR 3.851 then 3.1f Brunger 4 structure solution X-PLOR 3.851 then 3.1f Brunger