7SBD

Murine Fab/IgE in complex with profilin from Hevea brasieliensis (Hev b 8)

7SBD の概要

• エントリーDOI: 10.2210/pdb7sbd/pdb
• 分子名称: Fab/IgE Heavy chain, Fab/IgE Light chain, Profilin-2, ... (4 entities in total)
• 機能のキーワード: antibody, allergen, ige/fab fragment, complex, allergen-immune system complex, allergen/immune system
• 由来する生物種: Hevea brasiliensis (rubber tree); 詳細
• タンパク質・核酸の鎖数: 3
• 化学式量合計: 62373.63

構造登録者

Rodriguez-Romero, A.,Garcia-Ramirez, B. (登録日: 2021-09-24, 公開日: 2022-08-10, 最終更新日: 2024-11-06)

主引用文献

Garcia-Ramirez, B.,Mares-Mejia, I.,Rodriguez-Hernandez, A.,Cano-Sanchez, P.,Torres-Larios, A.,Ortega, E.,Rodriguez-Romero, A.
A native IgE in complex with profilin provides insights into allergen recognition and cross-reactivity.
Commun Biol, 5:748-748, 2022

PubMed Abstract: Allergies have become a rising health problem, where plentiful substances can trigger IgE-mediated allergies in humans. While profilins are considered minor allergens, these ubiquitous proteins are primary molecules involved in cross-reactivity and pollen-food allergy syndrome. Here we report the first crystal structures of murine Fab/IgE, with its chains naturally paired, in complex with the allergen profilin from Hevea brasiliensis (Hev b 8). The crystallographic models revealed that the IgE's six complementarity-determining regions (CDRs) interact with the allergen, comprising a rigid paratope-epitope surface of 926 Å, which includes an extensive network of interactions. Interestingly, we also observed previously unreported flexibility at Fab/IgE's elbow angle, which did not influence the shape of the paratope. The Fab/IgE exhibits a high affinity for Hev b 8, even when using 1 M NaCl in BLI experiments. Finally, based on the encouraging cross-reactivity assays using two mutants of the maize profilin (Zea m 12), this antibody could be a promising tool in IgE engineering for diagnosis and research applications.

PubMed: 35902770
DOI: 10.1038/s42003-022-03718-w

実験手法

X-RAY DIFFRACTION (3.04 Å)