+検索条件
-Structure paper
タイトル | Directed evolution of and structural insights into antibody-mediated disruption of a stable receptor-ligand complex. |
---|---|
ジャーナル・号・ページ | Nat Commun, Vol. 12, Issue 1, Page 7069, Year 2021 |
掲載日 | 2021年12月3日 |
著者 | Luke F Pennington / Pascal Gasser / Silke Kleinboelting / Chensong Zhang / Georgios Skiniotis / Alexander Eggel / Theodore S Jardetzky / |
PubMed 要旨 | Antibody drugs exert therapeutic effects via a range of mechanisms, including competitive inhibition, allosteric modulation, and immune effector mechanisms. Facilitated dissociation is an additional ...Antibody drugs exert therapeutic effects via a range of mechanisms, including competitive inhibition, allosteric modulation, and immune effector mechanisms. Facilitated dissociation is an additional mechanism where antibody-mediated "disruption" of stable high-affinity macromolecular complexes can potentially enhance therapeutic efficacy. However, this mechanism is not well understood or utilized therapeutically. Here, we investigate and engineer the weak disruptive activity of an existing therapeutic antibody, omalizumab, which targets IgE antibodies to block the allergic response. We develop a yeast display approach to select for and engineer antibody disruptive efficiency and generate potent omalizumab variants that dissociate receptor-bound IgE. We determine a low resolution cryo-EM structure of a transient disruption intermediate containing the IgE-Fc, its partially dissociated receptor and an antibody inhibitor. Our results provide a conceptual framework for engineering disruptive inhibitors for other targets, insights into the failure in clinical trials of the previous high affinity omalizumab HAE variant and anti-IgE antibodies that safely and rapidly disarm allergic effector cells. |
リンク | Nat Commun / PubMed:34862384 / PubMed Central |
手法 | EM (単粒子) / X線回折 |
解像度 | 2.75 - 7.29 Å |
構造データ | EMDB-25136, PDB-7sht: PDB-7shu: PDB-7shy: PDB-7shz: PDB-7si0: |
化合物 | ChemComp-NAG: ChemComp-EDO: ChemComp-PO4: ChemComp-HOH: ChemComp-GOL: ChemComp-MAN: ChemComp-ACT: ChemComp-NA: |
由来 |
|
キーワード | IMMUNE SYSTEM / IgE / allergy / Xolair / Omalizumab / inhibitor / E27 |