Cryo-EM Structure of HIV-1 Reverse Transcriptase p66 Homodimer in Complex with 5-{2-[2-(2-oxo-4-sulfanylidene-3,4-dihydropyrimidin-1(2H)-yl)ethoxy]phenoxy}naphthalene-2-carbonitrile (JLJ648), a Non-nucleoside Inhibitor
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
NIH/NAD AI155072
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
AI186613
米国
引用
ジャーナル: NPJ Drug Discov / 年: 2025 タイトル: Mechanistic basis for a novel dual-function Gag-Pol dimerizer potentiating CARD8 inflammasome activation and clearance of HIV-infected cells. 著者: Klarissa Hollander / Swapnil C Devarkar / Su Tang / Ritudhwaj Tiwari / Shumeng Ma / Won Gil Lee / Elizabeth Denn / Qiankun Wang / Krasimir A Spasov / Jake A Robbins / Kathleen M Frey / ...著者: Klarissa Hollander / Swapnil C Devarkar / Su Tang / Ritudhwaj Tiwari / Shumeng Ma / Won Gil Lee / Elizabeth Denn / Qiankun Wang / Krasimir A Spasov / Jake A Robbins / Kathleen M Frey / William L Jorgensen / Yong Xiong / Liang Shan / Karen S Anderson / 要旨: A strategy to functionally cure AIDS by eliminating latent HIV-1 reservoirs involves non-nucleoside reverse transcriptase inhibitors (NNRTIs) that promote pyroptosis of HIV-1 infected cells. These ...A strategy to functionally cure AIDS by eliminating latent HIV-1 reservoirs involves non-nucleoside reverse transcriptase inhibitors (NNRTIs) that promote pyroptosis of HIV-1 infected cells. These NNRTIs stimulate dimerization of the Gag-Pol polyprotein, resulting in premature HIV-1 protease (PR) dimerization and cleavage of intracellular CARD8. A unique cell-based high-throughput screen was developed to identify potent compounds activating the CARD8 inflammasome through Gag-Pol dimerization. Our in-house library of NNRTIs was evaluated, including a series of catechol diethers, which are potent, nontoxic antivirals. JLJ648 was identified as a promising dual-function antiviral and Gag-Pol dimerizer. Cryo-EM studies of HIV reverse transcriptase p66 bound to JLJ648 revealed populations of homodimers and, surprisingly, a homotetramer. This novel homotetramer structure resembling an 'infinity knot' revealed two JLJ648-bound homodimers forming an extensive interface and nucleated around a dimer of JLJ648 molecules. Structure-guided mutagenesis studies indicate that Gag-Pol homotetramerization may play a critical role in facilitating PR self-cleavage and triggering pyroptosis.
Chain - Source name: PDB / Chain - Initial model type: experimental model
得られたモデル
PDB-9mxr: Cryo-EM Structure of HIV-1 Reverse Transcriptase p66 Homodimer in Complex with 5-{2-[2-(2-oxo-4-sulfanylidene-3,4-dihydropyrimidin-1(2H)-yl)ethoxy] phenoxy}naphthalene-2-carbonitrile (JLJ648), a Non-nucleoside Inhibitor