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Title | Potent cross-neutralization of respiratory syncytial virus and human metapneumovirus through a structurally conserved antibody recognition mode. |
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Journal, issue, pages | Cell Host Microbe, Vol. 31, Issue 8, Page 1288-11300.e6, Year 2023 |
Publish date | Aug 9, 2023 |
Authors | Xiaolin Wen / Naveenchandra Suryadevara / Nurgun Kose / Jing Liu / Xiaoyan Zhan / Laura S Handal / Lauren E Williamson / Andrew Trivette / Robert H Carnahan / Theodore S Jardetzky / James E Crowe / |
PubMed Abstract | Respiratory syncytial virus (RSV) and human metapneumovirus (hMPV) infections pose a significant health burden. Using pre-fusion conformation fusion (F) proteins, we isolated a panel of anti-F ...Respiratory syncytial virus (RSV) and human metapneumovirus (hMPV) infections pose a significant health burden. Using pre-fusion conformation fusion (F) proteins, we isolated a panel of anti-F antibodies from a human donor. One antibody (RSV-199) potently cross-neutralized 8 RSV and hMPV strains by recognizing antigenic site III, which is partially conserved in RSV and hMPV F. Next, we determined the cryoelectron microscopy (cryo-EM) structures of RSV-199 bound to RSV F trimers, hMPV F monomers, and an unexpected dimeric form of hMPV F. These structures revealed how RSV-199 engages both RSV and hMPV F proteins through conserved interactions of the antibody heavy-chain variable region and how variability within heavy-chain complementarity-determining region 3 (HCDR3) can be accommodated at the F protein interface in site-III-directed antibodies. Furthermore, RSV-199 offered enhanced protection against RSV A and B strains and hMPV in cotton rats. These findings highlight the mechanisms of broad neutralization and therapeutic potential of RSV-199. |
External links | Cell Host Microbe / PubMed:37516111 / PubMed Central |
Methods | EM (single particle) |
Resolution | 2.46 - 3.48 Å |
Structure data | EMDB-27808, PDB-8dzw: EMDB-27846, PDB-8e2u: EMDB-27990, PDB-8eay: EMDB-27995, PDB-8ebp: |
Source |
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Keywords | STRUCTURAL PROTEIN / human antibodies / RSV and MPV Fusion protein / complex Cryo-EM structure / viral protein and antiviral protein / BIOSYNTHETIC PROTEIN / Human antibody |