National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
R01 AI145687
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
U54 AI170752
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
U01 AI169587
米国
引用
ジャーナル: Nat Commun / 年: 2024 タイトル: Conformational flexibility of HIV-1 envelope glycoproteins modulates transmitted/founder sensitivity to broadly neutralizing antibodies. 著者: Durgadevi Parthasarathy / Karunakar Reddy Pothula / Sneha Ratnapriya / Héctor Cervera Benet / Ruth Parsons / Xiao Huang / Salam Sammour / Katarzyna Janowska / Miranda Harris / Joseph ...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 / 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.
The data were processed in cryoSPARCv4.01. Movies were aligned using Patch Motion Correction and the non-dose weighted aligned micrographs were used for the CTF correction with PatchCTF Estimation.
粒子像選択
選択した数: 6566700 詳細: In the first round of particle selection, particles were picked with a box size of 280 angstroms using the Blob picker with a circular blob having a maximum diameter of 240 angstroms and ...詳細: In the first round of particle selection, particles were picked with a box size of 280 angstroms using the Blob picker with a circular blob having a maximum diameter of 240 angstroms and these particles were subjected to multiple rounds of 2D classification.
初期モデル
モデルのタイプ: OTHER / 詳細: ab initio
最終 再構成
解像度のタイプ: BY AUTHOR / 解像度: 3.8 Å / 解像度の算出法: FSC 0.5 CUT-OFF / 使用した粒子像数: 975399