SOLUTION NMR
NMR Experiment
ExperimentTypeSample ContentsSolventIonic StrengthpHPressureTemperature (K)Spectrometer
13D simultaneous 13C/15N edited NOESY0.6mM 13C,15N labeled FAT with 4.8mM LD2 peptide, 25mM TRIS-MALEATE, 0.1% NAN3, 1.0uM PPACK, 0.5mg/mL PEFABLOC, 90% H2O, 10% D2O20mM deuterated Tris-maleate, 50mM NaCl, 0.1mM EDTA, 0.1% NaN3, and 10% D2O, pH 6.050 mM NaCl6.01 atm310
23D CBCA(CO)NH0.6mM 13C,15N labeled FAT with 4.8mM LD2 peptide, 25mM TRIS-MALEATE, 0.1% NAN3, 1.0uM PPACK, 0.5mg/mL PEFABLOC, 90% H2O, 10% D2O20mM deuterated Tris-maleate, 50mM NaCl, 0.1mM EDTA, 0.1% NaN3, and 10% D2O, pH 6.050 mM NaCl6.01 atm310
33D HNCA0.6mM 13C,15N labeled FAT with 4.8mM LD2 peptide, 25mM TRIS-MALEATE, 0.1% NAN3, 1.0uM PPACK, 0.5mg/mL PEFABLOC, 90% H2O, 10% D2O20mM deuterated Tris-maleate, 50mM NaCl, 0.1mM EDTA, 0.1% NaN3, and 10% D2O, pH 6.050 mM NaCl6.01 atm310
43D HNCACB0.6mM 13C,15N labeled FAT with 4.8mM LD2 peptide, 25mM TRIS-MALEATE, 0.1% NAN3, 1.0uM PPACK, 0.5mg/mL PEFABLOC, 90% H2O, 10% D2O20mM deuterated Tris-maleate, 50mM NaCl, 0.1mM EDTA, 0.1% NaN3, and 10% D2O, pH 6.050 mM NaCl6.01 atm310
53D H(CCO)-TOCSY-NNH0.6mM 13C,15N labeled FAT with 4.8mM LD2 peptide, 25mM TRIS-MALEATE, 0.1% NAN3, 1.0uM PPACK, 0.5mg/mL PEFABLOC, 90% H2O, 10% D2O20mM deuterated Tris-maleate, 50mM NaCl, 0.1mM EDTA, 0.1% NaN3, and 10% D2O, pH 6.050 mM NaCl6.01 atm310
63D (H)C(CO)-TOCSY-NNH0.6mM 13C,15N labeled FAT with 4.8mM LD2 peptide, 25mM TRIS-MALEATE, 0.1% NAN3, 1.0uM PPACK, 0.5mg/mL PEFABLOC, 90% H2O, 10% D2O20mM deuterated Tris-maleate, 50mM NaCl, 0.1mM EDTA, 0.1% NaN3, and 10% D2O, pH 6.050 mM NaCl6.01 atm310
NMR Spectrometer Information
SpectrometerManufacturerModelField Strength
1VarianINOVA800
2VarianINOVA600
NMR Refinement
MethodDetailsSoftware
The program CNS version 1.1 with ARIA version 1.2 module was used to calculate the structures of the avian FAT domain.The structural restraints included NOE, hydrogen bond, dihedral angle, and RDC restraints. The NOE distance restraints were derived from a 3D simultaneous 13C/15N edited NOESY peak lists with 75 ms mixing time. The peak lists were generated automatically by NMRView and edited manually to remove any obvious water and apodization artifacts. The peak lists were unassigned and uncalibrated with respect to distance. To calibrate the NOE distances, the rotational correlation time of the complex was set to 10 ns and was based on values obtained on proteins of this size at similar temperature. The default parameters for ARIA produced structures with poor convergence. Several parameters were optimized, including the ambiguous cutoff (rho), the violation tolerance (vtol), and maximum number of ambiguities per peak (maxn), to provide better noise discrimination. The following scheme led to the best convergence over 9 iterations: rho = (0.95, 0.95, 0.95, 0.94, 0.93, 0.92, 0.91, 0.90, 0 80), vtol = (5.0, 2.0, 1.0, 0.5, 0.25, 1.0, 0.1, 0.1, 0.1), maxn = 5 for all iterations. An ensemble of 25 calculated NMR structures of the avian FAT domain was selected for further analysis.CNS
NMR Ensemble Information
Conformer Selection Criteriastructures with the lowest energy
Conformers Calculated Total Number100
Conformers Submitted Total Number25
Representative Model1 (closest to the average)
Additional NMR Experimental Information
DetailsAromatic sidechain assignments were obtained from 2D (HB)CB(CGCDCE)HE and 2D (HB)CB(CGCD)HD experiments. 1H-15N residual dipolar coupling values were measured using 7.5 mg/ml Pf1 phage as aligning medium
Computation: NMR Software
#ClassificationVersionSoftware NameAuthor
1refinementCNS1.1Brunger, A.T. et al.
2processingNMRPipe2.1Delaglio, F. et al.
3collectionVNMR6.1Varian
4refinementARIA1.2Linge, J.P. et al.
5data analysisNMRView5.0.4Johnson, B.A. et al.