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-Structure paper
タイトル | Microsecond dynamics control the HIV-1 Envelope conformation. |
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ジャーナル・号・ページ | Sci Adv, Vol. 10, Issue 5, Page eadj0396, Year 2024 |
掲載日 | 2024年2月2日 |
著者 | Ashley L Bennett / Robert Edwards / Irina Kosheleva / Carrie Saunders / Yishak Bililign / Ashliegh Williams / Pimthada Bubphamala / Katayoun Manosouri / Kara Anasti / Kevin O Saunders / S Munir Alam / Barton F Haynes / Priyamvada Acharya / Rory Henderson / |
PubMed 要旨 | The HIV-1 Envelope (Env) glycoprotein facilitates host cell fusion through a complex series of receptor-induced structural changes. Although remarkable progress has been made in understanding the ...The HIV-1 Envelope (Env) glycoprotein facilitates host cell fusion through a complex series of receptor-induced structural changes. Although remarkable progress has been made in understanding the structures of various Env conformations, microsecond timescale dynamics have not been studied experimentally. Here, we used time-resolved, temperature-jump small-angle x-ray scattering to monitor structural rearrangements in an HIV-1 Env SOSIP ectodomain construct with microsecond precision. In two distinct Env variants, we detected a transition that correlated with known Env structure rearrangements with a time constant in the hundreds of microseconds range. A previously unknown structural transition was also observed, which occurred with a time constant below 10 μs, and involved an order-to-disorder transition in the trimer apex. Using this information, we engineered an Env SOSIP construct that locks the trimer in the prefusion closed state by connecting adjacent protomers via disulfides. Our findings show that the microsecond timescale structural dynamics play an essential role in controlling the Env conformation with impacts on vaccine design. |
リンク | Sci Adv / PubMed:38306419 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 4.0 - 4.5 Å |
構造データ | EMDB-40853, PDB-8sxi: EMDB-40854, PDB-8sxj: |
由来 |
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キーワード | VIRAL PROTEIN/Immune System / HIV-1 / Envelope / Env / Ectodomain / Fusion protein / VIRAL PROTEIN / VIRAL PROTEIN-Immune System complex |