2AX8

Crystal Structure Of The Androgen Receptor Ligand Binding Domain W741L Mutant In Complex With S-1

2AX8 の概要

• エントリーDOI: 10.2210/pdb2ax8/pdb
• 関連するPDBエントリー: 2ax6 2ax7 2ax9 2axa
• 分子名称: Androgen receptor, S-3-(4-FLUOROPHENOXY)-2-HYDROXY-2-METHYL-N-[4-NITRO-3-(TRIFLUOROMETHYL)PHENYL]PROPANAMIDE (3 entities in total)
• 機能のキーワード: transcription
• 由来する生物種: Homo sapiens (human)
• 細胞内の位置: Nucleus : P10275
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 30198.19

構造登録者

Bohl, C.E.,Miller, D.D.,Chen, J.,Bell, C.E.,Dalton, J.T. (登録日: 2005-09-03, 公開日: 2005-09-20, 最終更新日: 2023-08-23)

主引用文献

Bohl, C.E.,Miller, D.D.,Chen, J.,Bell, C.E.,Dalton, J.T.
Structural Basis for Accommodation of Nonsteroidal Ligands in the Androgen Receptor
J.Biol.Chem., 280:37747-37754, 2005

PubMed Abstract: The mechanism by which the androgen receptor (AR) distinguishes between agonist and antagonist ligands is poorly understood. AR antagonists are currently used to treat prostate cancer. However, mutations commonly develop in patients that convert these compounds to agonists. Recently, our laboratory discovered selective androgen receptor modulators, which structurally resemble the nonsteroidal AR antagonists bicalutamide and hydroxyflutamide but act as agonists for the androgen receptor in a tissue-selective manner. To investigate why subtle structural changes to both the ligand and the receptor (i.e. mutations) result in drastic changes in activity, we studied structure-activity relationships for nonsteroidal AR ligands through crystallography and site-directed mutagenesis, comparing bound conformations of R-bicalutamide, hydroxyflutamide, and two previously reported nonsteroidal androgens, S-1 and R-3. These studies provide the first crystallographic evidence of the mechanism by which nonsteroidal ligands interact with the wild type AR. We have shown that changes induced to the positions of Trp-741, Thr-877, and Met-895 allow for ligand accommodation within the AR binding pocket and that a water-mediated hydrogen bond to the backbone oxygen of Leu-873 and the ketone of hydroxyflutamide is present when bound to the T877A AR variant. Additionally, we demonstrated that R-bicalutamide stimulates transcriptional activation in AR harboring the M895T point mutation. As a whole, these studies provide critical new insight for receptor-based drug design of nonsteroidal AR agonists and antagonists.

PubMed: 16129672
DOI: 10.1074/jbc.M507464200

実験手法

X-RAY DIFFRACTION (1.7 Å)