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-Structure paper
タイトル | Cleavage-intermediate Lassa virus trimer elicits neutralizing responses, identifies neutralizing nanobodies, and reveals an apex-situated site-of-vulnerability. |
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ジャーナル・号・ページ | Nat Commun, Vol. 15, Issue 1, Page 285, Year 2024 |
掲載日 | 2024年1月4日 |
著者 | Jason Gorman / Crystal Sao-Fong Cheung / Zhijian Duan / Li Ou / Maple Wang / Xuejun Chen / Cheng Cheng / Andrea Biju / Yaping Sun / Pengfei Wang / Yongping Yang / Baoshan Zhang / Jeffrey C Boyington / Tatsiana Bylund / Sam Charaf / Steven J Chen / Haijuan Du / Amy R Henry / Tracy Liu / Edward K Sarfo / Chaim A Schramm / Chen-Hsiang Shen / Tyler Stephens / I-Ting Teng / John-Paul Todd / Yaroslav Tsybovsky / Raffaello Verardi / Danyi Wang / Shuishu Wang / Zhantong Wang / Cheng-Yan Zheng / Tongqing Zhou / Daniel C Douek / John R Mascola / David D Ho / Mitchell Ho / Peter D Kwong / |
PubMed 要旨 | Lassa virus (LASV) infection is expanding outside its traditionally endemic areas in West Africa, posing a pandemic biothreat. LASV-neutralizing antibodies, moreover, have proven difficult to elicit. ...Lassa virus (LASV) infection is expanding outside its traditionally endemic areas in West Africa, posing a pandemic biothreat. LASV-neutralizing antibodies, moreover, have proven difficult to elicit. To gain insight into LASV neutralization, here we develop a prefusion-stabilized LASV glycoprotein trimer (GPC), pan it against phage libraries comprising single-domain antibodies (nanobodies) from shark and camel, and identify one, D5, which neutralizes LASV. Cryo-EM analyses reveal D5 to recognize a cleavage-dependent site-of-vulnerability at the trimer apex. The recognized site appears specific to GPC intermediates, with protomers lacking full cleavage between GP1 and GP2 subunits. Guinea pig immunizations with the prefusion-stabilized cleavage-intermediate LASV GPC, first as trimer and then as a nanoparticle, induce neutralizing responses, targeting multiple epitopes including that of D5; we identify a neutralizing antibody (GP23) from the immunized guinea pigs. Collectively, our findings define a prefusion-stabilized GPC trimer, reveal an apex-situated site-of-vulnerability, and demonstrate elicitation of LASV-neutralizing responses by a cleavage-intermediate LASV trimer. |
リンク | Nat Commun / PubMed:38177144 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 4.7 - 6.58 Å |
構造データ | EMDB-26740: Ligand-free Lassa GPC Trimer with C1 Symmetry EMDB-26859: Ligand-free Lassa GPC Trimer with C3 Symmetry EMDB-41048, PDB-8t5c: EMDB-41302: Lassa GPC trimer in complex with Fab GP23 |
化合物 | ChemComp-NAG: |
由来 |
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キーワード | VIRAL PROTEIN/IMMUNE SYSTEM / vaccine / GPC / GP1 / GP2 / VIRAL PROTEIN-IMMUNE SYSTEM complex |