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-Structure paper
タイトル | Structural basis of second-generation HIV integrase inhibitor action and viral resistance. |
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ジャーナル・号・ページ | Science, Vol. 367, Issue 6479, Page 806-810, Year 2020 |
掲載日 | 2020年2月14日 |
著者 | Nicola J Cook / Wen Li / Dénes Berta / Magd Badaoui / Allison Ballandras-Colas / Andrea Nans / Abhay Kotecha / Edina Rosta / Alan N Engelman / Peter Cherepanov / |
PubMed 要旨 | Although second-generation HIV integrase strand-transfer inhibitors (INSTIs) are prescribed throughout the world, the mechanistic basis for the superiority of these drugs is poorly understood. We ...Although second-generation HIV integrase strand-transfer inhibitors (INSTIs) are prescribed throughout the world, the mechanistic basis for the superiority of these drugs is poorly understood. We used single-particle cryo-electron microscopy to visualize the mode of action of the advanced INSTIs dolutegravir and bictegravir at near-atomic resolution. Glutamine-148→histidine (Q148H) and glycine-140→serine (G140S) amino acid substitutions in integrase that result in clinical INSTI failure perturb optimal magnesium ion coordination in the enzyme active site. The expanded chemical scaffolds of second-generation compounds mediate interactions with the protein backbone that are critical for antagonizing viruses containing the Q148H and G140S mutations. Our results reveal that binding to magnesium ions underpins a fundamental weakness of the INSTI pharmacophore that is exploited by the virus to engender resistance and provide a structural framework for the development of this class of anti-HIV/AIDS therapeutics. |
リンク | Science / PubMed:32001525 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.81 - 3.36 Å |
構造データ | EMDB-10041, PDB-6rwl: EMDB-10042, PDB-6rwm: EMDB-10043, PDB-6rwn: EMDB-10044, PDB-6rwo: |
化合物 | ChemComp-ZN: ChemComp-MG: ChemComp-KLQ: ChemComp-CL: ChemComp-HOH: ChemComp-DLU: |
由来 |
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キーワード | RECOMBINATION / retroviral integrase / lentivirus / strand transfer inhibior / protein-DNA complex |