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-Structure paper
| タイトル | The asymmetric opening of HIV-1 Env by a potent CD4 mimetic enables anti-coreceptor binding site antibodies to mediate ADCC. |
|---|---|
| ジャーナル・号・ページ | bioRxiv, Year 2024 |
| 掲載日 | 2024年8月27日 |
著者 | Jonathan Richard / Michael W Grunst / Ling Niu / Marco A Díaz-Salinas / William D Tolbert / Lorie Marchitto / Fei Zhou / Catherine Bourassa / Derek Yang / Ta Jung Chiu / Hung-Ching Chen / Mehdi Benlarbi / / Suneetha Gottumukkala / Wenwei Li / Katrina Dionne / Étienne Bélanger / Debashree Chatterjee / Halima Medjahed / Wayne A Hendrickson / Joseph Sodroski / Zabrina C Lang / Abraham J Morton / Rick K Huang / Doreen Matthies / Amos B Smith / Walther Mothes / James B Munro / Marzena Pazgier / Andrés Finzi / ![]() |
| PubMed 要旨 | HIV-1 envelope glycoproteins (Env) from primary HIV-1 isolates typically adopt a pretriggered "closed" conformation that resists to CD4-induced (CD4i) non-neutralizing antibodies (nnAbs) mediating ...HIV-1 envelope glycoproteins (Env) from primary HIV-1 isolates typically adopt a pretriggered "closed" conformation that resists to CD4-induced (CD4i) non-neutralizing antibodies (nnAbs) mediating antibody-dependent cellular cytotoxicity (ADCC). CD4-mimetic compounds (CD4mcs) "open-up" Env allowing binding of CD4i nnAbs, thereby sensitizing HIV-1-infected cells to ADCC. Two families of CD4i nnAbs, the anti-cluster A and anti-coreceptor binding site (CoRBS) Abs, are required to mediate ADCC in combination with the indane CD4mc BNM-III-170. Recently, new indoline CD4mcs with improved potency and breadth have been described. Here, we show that the lead indoline CD4mc, CJF-III-288, sensitizes HIV-1-infected cells to ADCC mediated by anti-CoRBS Abs alone, contributing to improved ADCC activity. Structural and conformational analyses reveal that CJF-III-288, in combination with anti-CoRBS Abs, potently stabilizes an asymmetric "open" State-3 Env conformation, This Env conformation orients the anti-CoRBS Ab to improve ADCC activity and therapeutic potential. |
リンク | bioRxiv / PubMed:39253431 / PubMed Central |
| 手法 | EM (単粒子) / EM (サブトモグラム平均) |
| 解像度 | 3.5 - 21.5 Å |
| 構造データ | EMDB-45530, PDB-9cf5: ![]() EMDB-46646: HIV-1 BaL Env in complex with CD4 mimetic CJF-III-288 and 17b IgG |
| 化合物 | ![]() ChemComp-NAG: ![]() ChemComp-Y26: |
| 由来 |
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キーワード | VIRAL PROTEIN/IMMUNE SYSTEM / HIV-1 / FUSION / ENTRY / MEMBRANE / VIRAL PROTEIN / VIRAL PROTEIN-IMMUNE SYSTEM COMPLEX |
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human immunodeficiency virus 1 (ヒト免疫不全ウイルス)
homo sapiens (ヒト)
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