SOLUTION NMR Experimental Data


Experimental Details
Sample Conditions
Sample Contents12 mM psi-conotoxin PIIIF; TFA added to pH 3.5
Solvent90% H2O/10% D2O
Ionic Strength12 mM; tetra-TFA salt
pH3.5
Pressureambient
Temperature (K)277
Experiment(s):2D NOESY, DQF-COSY
Sample Contents12 mM psi-conotoxin PIIIF
Solvent100% D2O
Ionic Strength12 mM; tetra-TFA salt
pH3.5
Pressureambient
Temperature (K)295
Experiment(s):PE-COSY
Sample Contents14 mM of psi-conotoxin PIIIF [5,10,16,21,22] 3-13C-Cys; TFA added to pH 3.5
Solvent90% H2O/10% D2O
Ionic Strength12 mM; tetra-TFA salt
pH3.5
Pressureambient
Temperature (K)277
Experiment(s):13C-selected 2D NOESY
Sample Contents16 mM of psi-conotoxin PIIIF [4] 3-13C-Cys; TFA added to pH 3.5
Solvent90% H2O/10% D2O
Ionic Strength12 mM; tetra-TFA salt
pH3.5
Pressureambient
Temperature (K)277
Experiment(s):13C-selected 2D NOESY, Double half-filtered 2D NOESY
Sample Contents16 mM of psi-conotoxin PIIIF [4] 3-13C-Cys; TFA added to pH 3.5
Solvent90% H2O/10% D2O
Ionic Strength12 mM; tetra-TFA salt
pH3.5
Pressureambient
Temperature (K)295
Experiment(s):Double half-filtered 2D PE-COSY, 13C-selected 1D 1H NMR
Spectrometer Information
Manufacturer Model Field Strength
Varian UNITY 500.0
Varian INOVA 600.0
NMR Refinement
Method distance geometry molecular dynamics relaxation matrix distance geometry simulated annealing
Details These structures are based on 380 NOE-derived distance restraints, 7 restraints on phi derived from J-coupling, and 7 restraints on chi1 determined from J-coupling and NOE volumes.
NMR Ensemble Information
Conformer Selection Criteria back calculated data agree with experimental NOESY spectrum, structures with the least restraint violations, structures with the lowest energy
Conformers Calculated Total Number 50
Conformers Submitted Total Number 17
Representative Model Choice Rationale
1 closest to the average
Additional NMR Experimental Information
1 This structure was determined using isotopic filtration and isotope-selected 1H observation in addition to standard homonuclear techniques.
Computation: NMR Software
# Classification Software Name Author
1 collection version: 6.1B VNMR Varian, Inc.
2 processing version: 97.0 FELIX MSI, Inc.
3 iterative matrix relaxation version: 97.0 IRMA MSI, Inc.
4 structure solution version: 97.0 DGII MSI, Inc.
5 structure solution version: 2.98 DISCOVER MSI, Inc.
6 refinement version: 2.98 DISCOVER MSI, Inc.