期刊
NATURE COMMUNICATIONS
卷 9, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-018-03632-y
关键词
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资金
- Howard Hughes Medical Institute
- Burroughs Wellcome Fund
- National Institute Of Allergy And Infectious Diseases of the National Institutes of Health [HIVRAD P01 AI100148]
- Bill and Melinda Gates Foundation [OPP1124068]
- Gordon and Betty Moore Foundation
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-76SF00515]
- US Department of Energy Office of Biological and Environmental Research
- National Institutes of Health (NIH), National Institute of General Medical Sciences [P41GM103393]
- Bill and Melinda Gates Foundation [OPP1124068] Funding Source: Bill and Melinda Gates Foundation
Broadly neutralizing antibodies (bNAbs) isolated from HIV-1-infected individuals inform HIV-1 vaccine design efforts. Developing bNAbs with increased efficacy requires understanding how antibodies interact with the native oligomannose and complex-type N- glycan shield that hides most protein epitopes on HIV-1 envelope ( Env). Here we present crystal structures, including a 3.8-angstrom X-ray free electron laser dataset, of natively glycosylated Env trimers complexed with BG18, the most potent V3/N332(gp120) glycan-targeting bNAb reported to date. Our structures show conserved contacts mediated by common D gene-encoded residues with the N332(gp120) glycan and the gp120 GDIR peptide motif, but a distinct Env-binding orientation relative to PGT121/10-1074 bNAbs. BG18's binding orientation provides additional contacts with N392(gp120) and N386(gp120) glycans near the V3-loop base and engages protein components of the V1-loop. The BG18-natively-glycosylated Env structures facilitate understanding of bNAb-glycan interactions critical for using V3/N332(gp120) bNAbs therapeutically and targeting their epitope for immunogen design.
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