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-Structure paper
| タイトル | Conformational flexibility of HIV-1 envelope glycoproteins modulates transmitted/founder sensitivity to broadly neutralizing antibodies. |
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| ジャーナル・号・ページ | Nat Commun, Vol. 15, Issue 1, Page 7334, Year 2024 |
| 掲載日 | 2024年8月26日 |
著者 | Durgadevi Parthasarathy / Karunakar Reddy Pothula / Sneha Ratnapriya / Héctor Cervera Benet / Ruth Parsons / Xiao Huang / Salam Sammour / Katarzyna Janowska / Miranda Harris / Joseph Sodroski / Priyamvada Acharya / Alon Herschhorn / ![]() |
| PubMed 要旨 | HIV-1 envelope glycoproteins (Envs) of most primary HIV-1 strains exist in closed conformation and infrequently sample open states, limiting access to internal epitopes. Thus, immunogen design aims ...HIV-1 envelope glycoproteins (Envs) of most primary HIV-1 strains exist in closed conformation and infrequently sample open states, limiting access to internal epitopes. Thus, immunogen design aims to mimic the closed Env conformation as preferred target for eliciting broadly neutralizing antibodies (bnAbs). Here we identify incompletely closed Env conformations of 6 out of 13 transmitted/founder (T/F) strains that are sensitive to antibodies that recognize internal epitopes typically exposed on open Envs. A 3.6 Å cryo-electron microscopy structure of unliganded, incompletely closed T/F Envs (1059-SOSIP) reveals protomer motion that increased sampling of states with incompletely closed trimer apex. We reconstruct de novo the post-transmission evolutionary pathway of a second T/F. Evolved viruses exhibit increased Env resistance to cold, soluble CD4 and 19b, all of which correlate with closing of the adapted Env trimer. Lastly, we show that the ultra-broad N6 bnAb efficiently recognizes different Env conformations and exhibits improved antiviral breadth against VRC01-resistant Envs isolated during the first-in-humans antibody-mediated-prevention trial. |
リンク | Nat Commun / PubMed:39187497 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.6 - 3.8 Å |
| 構造データ | EMDB-41244, PDB-8tgu: EMDB-41246, PDB-8tgw: |
| 化合物 | ![]() ChemComp-NAG: |
| 由来 |
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キーワード | VIRAL PROTEIN / HIV-1 / Glycoprotein / Lectin / Trimer |
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human immunodeficiency virus 1 (ヒト免疫不全ウイルス)
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