SOLUTION NMR Experimental Data


Experimental Details
Sample Conditions
Sample Contents0.6mM 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% D2O
Solvent20mM deuterated Tris-maleate, 50mM NaCl, 0.1mM EDTA, 0.1% NaN3, and 10% D2O, pH 6.0
Ionic Strength50 mM NaCl
pH6.0
Pressure1
Temperature (K)310
Experiment(s):3D simultaneous 13C/15N edited NOESY, 3D CBCA(CO)NH, 3D HNCA, 3D HNCACB, 3D H(CCO)-TOCSY-NNH, 3D (H)C(CO)-TOCSY-NNH
Spectrometer Information
Manufacturer Model Field Strength
Varian INOVA 600.0
Varian INOVA 800.0
NMR Refinement
Method The program CNS version 1.1 with ARIA version 1.2 module was used to calculate the structures of the avian FAT domain.
Details 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.
NMR Ensemble Information
Conformer Selection Criteria structures with the lowest energy
Conformers Calculated Total Number 100
Conformers Submitted Total Number 25
Representative Model Choice Rationale
1 closest to the average
Additional NMR Experimental Information
1 Aromatic 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
# Classification Software Name Author
1 refinement version: 1.1 CNS Brunger, A.T. et al.
2 processing version: 2.1 NMRPipe Delaglio, F. et al.
3 collection version: 6.1 VNMR Varian
4 refinement version: 1.2 ARIA Linge, J.P. et al.
5 data analysis version: 5.0.4 NMRVIEW Johnson, B.A. et al.