Text: 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
手法: The program CNS version 1.1 with ARIA version 1.2 module was used to calculate the structures of the avian FAT domain. ソフトェア番号: 1 詳細: 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 ...詳細: 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.
代表構造
選択基準: closest to the average
NMRアンサンブル
コンフォーマー選択の基準: structures with the lowest energy 計算したコンフォーマーの数: 100 / 登録したコンフォーマーの数: 25