3HUK

Benzylacetate in complex with T4 lysozyme L99A/M102Q

3HUK の概要

• エントリーDOI: 10.2210/pdb3huk/pdb
• 関連するPDBエントリー: 1LGU 3HT6 3HT7 3HT8 3HT9 3HTB 3HTD 3HTF 3HU8 3HU9 3HUA 3HUG 3HUQ
• 分子名称: Lysozyme, PHOSPHATE ION, benzyl acetate, ... (5 entities in total)
• 機能のキーワード: hydrolase, glycosidase, bacteriolytic enzyme, antimicrobial
• 由来する生物種: Enterobacteria phage T4 (Bacteriophage T4)
• 細胞内の位置: Host cytoplasm : P00720
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 19047.73

構造登録者

Boyce, S.E.,Mobley, D.L.,Rocklin, G.J.,Graves, A.P.,Dill, K.A.,Shoichet, B.K. (登録日: 2009-06-14, 公開日: 2009-11-03, 最終更新日: 2023-09-06)

主引用文献

Boyce, S.E.,Mobley, D.L.,Rocklin, G.J.,Graves, A.P.,Dill, K.A.,Shoichet, B.K.
Predicting ligand binding affinity with alchemical free energy methods in a polar model binding site.
J.Mol.Biol., 394:747-763, 2009

PubMed Abstract: We present a combined experimental and modeling study of organic ligand molecules binding to a slightly polar engineered cavity site in T4 lysozyme (L99A/M102Q). For modeling, we computed alchemical absolute binding free energies. These were blind tests performed prospectively on 13 diverse, previously untested candidate ligand molecules. We predicted that eight compounds would bind to the cavity and five would not; 11 of 13 predictions were correct at this level. The RMS error to the measurable absolute binding energies was 1.8 kcal/mol. In addition, we computed "relative" binding free energies for six phenol derivatives starting from two known ligands: phenol and catechol. The average RMS error in the relative free energy prediction was 2.5 kcal/mol (phenol) and 1.1 kcal/mol (catechol). To understand these results at atomic resolution, we obtained x-ray co-complex structures for nine of the diverse ligands and for all six phenol analogs. The average RMSD of the predicted pose to the experiment was 2.0 A (diverse set), 1.8 A (phenol-derived predictions), and 1.2 A (catechol-derived predictions). We found that predicting accurate affinities and rank-orderings required near-native starting orientations of the ligand in the binding site. Unanticipated binding modes, multiple ligand binding, and protein conformational change all proved challenging for the free energy methods. We believe that these results can help guide future improvements in physics-based absolute binding free energy methods.

PubMed: 19782087
DOI: 10.1016/j.jmb.2009.09.049

実験手法

X-RAY DIFFRACTION (1.29 Å)