Download MendeleyStructures and immune recognition of Env trimers from two Asia prevalent HIV-1 CRFs.
Niu, J., Wang, Q., Zhao, W., Meng, B., Xu, Y., Zhang, X., Feng, Y., Qi, Q., Hao, Y., Zhang, X., Liu, Y., Xiang, J., Shao, Y., Yang, B.(2023) Nat Commun 14: 4676-4676
- PubMed: 37542068
- DOI: https://doi.org/10.1038/s41467-023-40321-x
- Primary Citation of Related Structures:
8GP5, 8GPG, 8GPI, 8GPJ, 8GPK - PubMed Abstract:
Structure-guided immunofocusing HIV-1 vaccine design entails a comprehensive understanding of Envs from diverse HIV-1 subtypes, including circulating recombinant forms (CRFs). Here, we present the cryo-EM structures of Envs from two Asia prevalent CRFs (CRF01_AE and CRF07_BC) at 3.0 and 3.5 Å. We compare the structures and glycosylation patterns of Envs from different subtypes and perform cross-clade statistical analyses to reveal the unique features of CRF01_AE V1 region, which are associated with the resistance to certain bNAbs. We also solve a 4.1 Å cryo-EM structure of CRF01_AE Env in complex with F6, the first bNAb from CRF01_AE-infected individuals. F6 recognizes a gp120-gp41 spanning epitope to allosterically destabilize the Env trimer apex and weaken inter-protomer packing, which in turn hinders the receptor binding and induces Env trimer disassembly, demonstrating a dual mechanism of neutralization. These findings broaden our understanding of CRF Envs and shed lights on immunofocusing HIV-1 vaccine design.
Organizational Affiliation:
Shanghai Institute for Advanced Immunochemical Studies and School of Life Science and Technology, ShanghaiTech University, Shanghai, 201210, China.
