5B18

Crystal Structure of a Darunavir Resistant HIV-1 Protease

5B18 の概要

• エントリーDOI: 10.2210/pdb5b18/pdb
• 分子名称: Protease, CHLORIDE ION, ACETATE ION, ... (4 entities in total)
• 機能のキーワード: hiv-1 protease, drug resistance, darunavir, flap, hydrolase
• 由来する生物種: Human immunodeficiency virus 1
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 44019.53

構造登録者

Suzuki, K.,Ode, H.,Nakashima, M.,Sugiura, W.,Watanabe, N.,Suzuki, A.,Iwatani, Y. (登録日: 2015-11-30, 公開日: 2016-04-13, 最終更新日: 2023-11-08)

主引用文献

Nakashima, M.,Ode, H.,Suzuki, K.,Fujino, M.,Maejima, M.,Kimura, Y.,Masaoka, T.,Hattori, J.,Matsuda, M.,Hachiya, A.,Yokomaku, Y.,Suzuki, A.,Watanabe, N.,Sugiura, W.,Iwatani, Y.
Unique Flap Conformation in an HIV-1 Protease with High-Level Darunavir Resistance
Front Microbiol, 7:61-61, 2016

PubMed Abstract: Darunavir (DRV) is one of the most powerful protease inhibitors (PIs) for treating human immunodeficiency virus type-1 (HIV-1) infection and presents a high genetic barrier to the generation of resistant viruses. However, DRV-resistant HIV-1 infrequently emerges from viruses exhibiting resistance to other protease inhibitors. To address this resistance, researchers have gathered genetic information on DRV resistance. In contrast, few structural insights into the mechanism underlying DRV resistance are available. To elucidate this mechanism, we determined the crystal structure of the ligand-free state of a protease with high-level DRV resistance and six DRV resistance-associated mutations (including I47V and I50V), which we generated by in vitro selection. This crystal structure showed a unique curling conformation at the flap regions that was not found in the previously reported ligand-free protease structures. Molecular dynamics simulations indicated that the curled flap conformation altered the flap dynamics. These results suggest that the preference for a unique flap conformation influences DRV binding. These results provide new structural insights into elucidating the molecular mechanism of DRV resistance and aid to develop PIs effective against DRV-resistant viruses.

PubMed: 26870021
DOI: 10.3389/fmicb.2016.00061

実験手法

X-RAY DIFFRACTION (1.8 Å)