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-Structure paper
タイトル | Cryo-EM structures of prefusion SIV envelope trimer. |
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ジャーナル・号・ページ | Nat Struct Mol Biol, Vol. 29, Issue 11, Page 1080-1091, Year 2022 |
掲載日 | 2022年11月7日 |
著者 | Jason Gorman / Chunyan Wang / Rosemarie D Mason / Alexandra F Nazzari / Hugh C Welles / Tongqing Zhou / Julian W Bess / Tatsiana Bylund / Myungjin Lee / Yaroslav Tsybovsky / Raffaello Verardi / Shuishu Wang / Yongping Yang / Baoshan Zhang / Reda Rawi / Brandon F Keele / Jeffrey D Lifson / Jun Liu / Mario Roederer / Peter D Kwong / |
PubMed 要旨 | Simian immunodeficiency viruses (SIVs) are lentiviruses that naturally infect non-human primates of African origin and seeded cross-species transmissions of HIV-1 and HIV-2. Here we report prefusion ...Simian immunodeficiency viruses (SIVs) are lentiviruses that naturally infect non-human primates of African origin and seeded cross-species transmissions of HIV-1 and HIV-2. Here we report prefusion stabilization and cryo-EM structures of soluble envelope (Env) trimers from rhesus macaque SIV (SIV) in complex with neutralizing antibodies. These structures provide residue-level definition for SIV-specific disulfide-bonded variable loops (V1 and V2), which we used to delineate variable-loop coverage of the Env trimer. The defined variable loops enabled us to investigate assembled Env-glycan shields throughout SIV, which we found to comprise both N- and O-linked glycans, the latter emanating from V1 inserts, which bound the O-link-specific lectin jacalin. We also investigated in situ SIV-Env trimers on virions, determining cryo-electron tomography structures at subnanometer resolutions for an antibody-bound complex and a ligand-free state. Collectively, these structures define the prefusion-closed structure of the SIV-Env trimer and delineate variable-loop and glycan-shielding mechanisms of immune evasion conserved throughout SIV evolution. |
リンク | Nat Struct Mol Biol / PubMed:36344847 / PubMed Central |
手法 | EM (サブトモグラム平均) / EM (単粒子) |
解像度 | 4.12 - 10.0 Å |
構造データ | EMDB-25062: In-situ structure of SIV trimer EMDB-25063: in situ SIVmac239-Env trimers on the surface of AT-2-inactivated virions EMDB-25064: in situ SIVmac239-Env trimers on the surface of AT-2-inactivated virions EMDB-25065: In-situ structure of SIVmac239-Env trimers with ITS90.03 associated EMDB-27631: SIV mac239 SOS-2P K169T Env trimer with bNAb PGT145 and jacalin EMDB-27718, PDB-8dua: EMDB-27735, PDB-8dvd: |
化合物 | ChemComp-NAG: ChemComp-MAN: |
由来 |
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キーワード | VIRAL PROTEIN/IMMUNE SYSTEM / SIV / ITS92 / HIV-1 / quaternary / HIV-2 / VIRAL PROTEIN-IMMUNE SYSTEM complex / CD4 / SOSIP / Vaccine / IMMUNE SYSTEM / VIRAL PROTEIN |