SOLUTION NMR Experimental Data

Experimental Details
Sample Conditions
Sample Contents16 mM psi-conotoxin PIIIE [4,21] 3-13C-Cys; TFA added to pH 3.5
Solvent90% H2O, 10% D2O
Ionic Strength16 mM; hexa-TFA salt
Temperature (K)277
Experiment(s):3D_13C-separated_NOESY, DQF-COSY, Double half-filtered 2D NOESY
Sample Contents16 mM psi-conotoxin PIIIE [4,21] 3-13C-Cys
Solvent100% D2O
Ionic Strength16 mM; hexa-TFA salt
Temperature (K)295
Experiment(s):Half-filtered PE-COSY
Spectrometer Information
Manufacturer Model Field Strength
Varian INOVA 600.0
Varian UNITY 500.0
NMR Refinement
Method distance geometry molecular dynamics relaxation matrix distance geometry simulated annealing
Details These structures are based on 566 NOE-derived distance restraints, 9 restraints on phi derived from J-coupling, and 13 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 13
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 refinement DISCOVER 2.98 MSI, Inc.
2 collection VNMR 6.1B Varian, Inc.
3 iterative matrix relaxation IRMA 97.0 MSI, Inc.
4 structure solution DGII 97.0 MSI, Inc.
5 structure solution DISCOVER 2.98 MSI, Inc.
6 processing FELIX 97.0 MSI, Inc.