9DWE

Cryo-EM structure of hemagglutinin H5 A/Texas/37/2024 in complex with LSTa and antibody CR9114

9DWE の概要

• エントリーDOI: 10.2210/pdb9dwe/pdb
• EMDBエントリー: 47241
• 分子名称: CR9114 Fab light chain, CR9114 Fab Fab heavy chain, Hemagglutinin, ... (5 entities in total)
• 機能のキーワード: hemagglutinin, sialic acid complex, antibody, viral protein, h5n1, viral protein-immune system complex, viral protein/immune system
• 由来する生物種: Homo sapiens; 詳細
• タンパク質・核酸の鎖数: 9
• 化学式量合計: 273509.03

構造登録者

Fernandez-Quintero, M.L.,Han, J.,Rodriguez, A.J.,Ward, A.B. (登録日: 2024-10-09, 公開日: 2024-12-04, 最終更新日: 2025-01-15)

主引用文献

Good, M.R.,Fernandez-Quintero, M.L.,Ji, W.,Rodriguez, A.J.,Han, J.,Ward, A.B.,Guthmiller, J.J.
A single mutation in dairy cow-associated H5N1 viruses increases receptor binding breadth.
Nat Commun, 15:10768-10768, 2024

PubMed Abstract: Clade 2.3.4.4b H5N1 is causing an unprecedented outbreak in dairy cows in the United States. To understand if recent H5N1 viruses are changing their receptor use, we screened recombinant hemagglutinin (HA) from historical and recent 2.3.4.4b H5N1 viruses for binding to distinct glycans bearing terminal sialic acids using a glycan microarray. We find that H5 from A/Texas/37/2024, an isolate from the dairy cow outbreak, has increased binding breadth to core glycans bearing terminal α2,3 sialic acids, the avian receptor, compared to historical and recent 2.3.4.4b H5N1 viruses. We do not observe any binding to α2,6 sialic acids, the receptor used by human seasonal influenza viruses. Using molecular dynamics and a cryo-EM structure of A/Texas/37/2024 H5, we show A/Texas/37/2024 H5 is more flexible within the receptor-binding site compared to a 2.3.4.4b H5 from 2022. We identify a single mutation outside of the receptor binding site, T199I, is responsible for increased binding breadth, as it increases receptor binding site flexibility. Together, these data show recent H5N1 viruses are evolving increased receptor binding breadth which could impact the host range and cell types infected with H5N1.

PubMed: 39737954
DOI: 10.1038/s41467-024-54934-3

実験手法

ELECTRON MICROSCOPY (2.8 Å)