National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
UM1 AI144462
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
F31 AI131873
米国
引用
ジャーナル: Cell Rep / 年: 2021 タイトル: Structural basis of glycan276-dependent recognition by HIV-1 broadly neutralizing antibodies. 著者: Christopher A Cottrell / Kartik Manne / Rui Kong / Shuishu Wang / Tongqing Zhou / Gwo-Yu Chuang / Robert J Edwards / Rory Henderson / Katarzyna Janowska / Megan Kopp / Bob C Lin / Mark K ...著者: Christopher A Cottrell / Kartik Manne / Rui Kong / Shuishu Wang / Tongqing Zhou / Gwo-Yu Chuang / Robert J Edwards / Rory Henderson / Katarzyna Janowska / Megan Kopp / Bob C Lin / Mark K Louder / Adam S Olia / Reda Rawi / Chen-Hsiang Shen / Justin D Taft / Jonathan L Torres / Nelson R Wu / Baoshan Zhang / Nicole A Doria-Rose / Myron S Cohen / Barton F Haynes / Lawrence Shapiro / Andrew B Ward / Priyamvada Acharya / John R Mascola / Peter D Kwong / 要旨: Recognition of N-linked glycan at residue N276 (glycan276) at the periphery of the CD4-binding site (CD4bs) on the HIV-envelope trimer is a formidable challenge for many CD4bs-directed antibodies. To ...Recognition of N-linked glycan at residue N276 (glycan276) at the periphery of the CD4-binding site (CD4bs) on the HIV-envelope trimer is a formidable challenge for many CD4bs-directed antibodies. To understand how this glycan can be recognized, here we isolate two lineages of glycan276-dependent CD4bs antibodies. Antibody CH540-VRC40.01 (named for donor-lineage.clone) neutralizes 81% of a panel of 208 diverse strains, while antibody CH314-VRC33.01 neutralizes 45%. Cryo-electron microscopy (cryo-EM) structures of these two antibodies and 179NC75, a previously identified glycan276-dependent CD4bs antibody, in complex with HIV-envelope trimer reveal substantially different modes of glycan276 recognition. Despite these differences, binding of glycan276-dependent antibodies maintains a glycan276 conformation similar to that observed in the absence of glycan276-binding antibodies. By contrast, glycan276-independent CD4bs antibodies, such as VRC01, displace glycan276 upon binding. These results provide a foundation for understanding antibody recognition of glycan276 and suggest its presence may be crucial for priming immunogens seeking to initiate broad CD4bs recognition.