登録情報 データベース : EMDB / ID : EMD-55517 ダウンロードとリンクタイトル Structure of human HER2 in complex with EPS232 Fab マップデータMain Post-processed map for HER2 in complex with EPS232 Fab 詳細 試料複合体 : Human HER2 in complex with EPS232 Fabタンパク質・ペプチド : Ig-like domain-containing proteinタンパク質・ペプチド : EPS232 Fab HCタンパク質・ペプチド : Receptor tyrosine-protein kinase erbB-2 詳細 キーワード Antibody Fab / Complex / cancer / extracellular domain. / ANTITUMOR PROTEIN機能・相同性 機能・相同性情報分子機能 ドメイン・相同性 構成要素
negative regulation of immature T cell proliferation in thymus / ERBB3:ERBB2 complex / ERBB2-ERBB4 signaling pathway / immature T cell proliferation in thymus / GRB7 events in ERBB2 signaling / RNA polymerase I core binding / semaphorin receptor complex / Developmental Lineage of Mammary Stem Cells / ErbB-3 class receptor binding / motor neuron axon guidance ... negative regulation of immature T cell proliferation in thymus / ERBB3:ERBB2 complex / ERBB2-ERBB4 signaling pathway / immature T cell proliferation in thymus / GRB7 events in ERBB2 signaling / RNA polymerase I core binding / semaphorin receptor complex / Developmental Lineage of Mammary Stem Cells / ErbB-3 class receptor binding / motor neuron axon guidance / Sema4D induced cell migration and growth-cone collapse / regulation of microtubule-based process / PLCG1 events in ERBB2 signaling / enzyme-linked receptor protein signaling pathway / ERBB2 Activates PTK6 Signaling / ERBB2-EGFR signaling pathway / neurotransmitter receptor localization to postsynaptic specialization membrane / ERBB2-ERBB3 signaling pathway / Drug-mediated inhibition of ERBB2 signaling / Resistance of ERBB2 KD mutants to trastuzumab / Resistance of ERBB2 KD mutants to sapitinib / Resistance of ERBB2 KD mutants to tesevatinib / Resistance of ERBB2 KD mutants to neratinib / Resistance of ERBB2 KD mutants to osimertinib / Resistance of ERBB2 KD mutants to afatinib / Resistance of ERBB2 KD mutants to AEE788 / Resistance of ERBB2 KD mutants to lapatinib / Drug resistance in ERBB2 TMD/JMD mutants / positive regulation of MAP kinase activity / positive regulation of Rho protein signal transduction / neuromuscular junction development / positive regulation of transcription by RNA polymerase I / ERBB2 Regulates Cell Motility / Developmental Lineage of Mammary Gland Myoepithelial Cells / oligodendrocyte differentiation / semaphorin-plexin signaling pathway / PI3K events in ERBB2 signaling / regulation of angiogenesis / positive regulation of protein targeting to membrane / regulation of ERK1 and ERK2 cascade / Schwann cell development / coreceptor activity / peptidyl-tyrosine phosphorylation / Signaling by ERBB2 / TFAP2 (AP-2) family regulates transcription of growth factors and their receptors / myelination / transmembrane receptor protein tyrosine kinase activity / GRB2 events in ERBB2 signaling / SHC1 events in ERBB2 signaling / positive regulation of cell adhesion / cell surface receptor protein tyrosine kinase signaling pathway / Constitutive Signaling by Overexpressed ERBB2 / Downregulation of ERBB2:ERBB3 signaling / cellular response to epidermal growth factor stimulus / basal plasma membrane / positive regulation of epithelial cell proliferation / positive regulation of translation / neuromuscular junction / wound healing / phosphatidylinositol 3-kinase/protein kinase B signal transduction / Signaling by ERBB2 TMD/JMD mutants / receptor protein-tyrosine kinase / Signaling by ERBB2 ECD mutants / Signaling by ERBB2 KD Mutants / receptor tyrosine kinase binding / cellular response to growth factor stimulus / Downregulation of ERBB2 signaling / ruffle membrane / epidermal growth factor receptor signaling pathway / Constitutive Signaling by Aberrant PI3K in Cancer / neuron differentiation / transmembrane signaling receptor activity / PIP3 activates AKT signaling / myelin sheath / heart development / PI5P, PP2A and IER3 Regulate PI3K/AKT Signaling / RAF/MAP kinase cascade / positive regulation of cell growth / protein tyrosine kinase activity / presynaptic membrane / basolateral plasma membrane / protein phosphorylation / early endosome / positive regulation of MAPK cascade / cell surface receptor signaling pathway / cell population proliferation / signaling receptor complex / endosome membrane / apical plasma membrane / intracellular signal transduction / protein heterodimerization activity / signaling receptor binding / negative regulation of apoptotic process / perinuclear region of cytoplasm / signal transduction / nucleoplasm / ATP binding / membrane / identical protein binding / nucleus 類似検索 - 分子機能 : / Epidermal growth factor receptor transmembrane-juxtamembrane segment / Tyrosine protein kinase, EGF/ERB/XmrK receptor / Growth factor receptor domain 4 / Growth factor receptor domain IV / Receptor L-domain / Furin-like cysteine-rich domain / Receptor L-domain superfamily / Furin-like cysteine rich region / Receptor L domain ... : / Epidermal growth factor receptor transmembrane-juxtamembrane segment / Tyrosine protein kinase, EGF/ERB/XmrK receptor / Growth factor receptor domain 4 / Growth factor receptor domain IV / Receptor L-domain / Furin-like cysteine-rich domain / Receptor L-domain superfamily / Furin-like cysteine rich region / Receptor L domain / Furin-like repeat / Furin-like repeats / Growth factor receptor cysteine-rich domain superfamily / : / Tyrosine-protein kinase, catalytic domain / Tyrosine kinase, catalytic domain / Tyrosine protein kinases specific active-site signature. / Tyrosine-protein kinase, active site / Protein tyrosine and serine/threonine kinase / Serine-threonine/tyrosine-protein kinase, catalytic domain / Protein kinase, ATP binding site / Protein kinases ATP-binding region signature. / Protein kinase domain profile. / Protein kinase domain / Protein kinase-like domain superfamily 類似検索 - ドメイン・相同性生物種 Homo sapiens (ヒト)手法 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度 : 3.5 Å 詳細 データ登録者Birtley J / Johnson RM / Regan L / Soni K / Pye VE / Fitzgerald K 資金援助 英国, 1件 詳細 詳細を隠すOrganization Grant number 国 Not funded 英国
引用ジャーナル : Sci Rep / 年 : 2026タイトル : Elucidating the relationship between affinity and potency in the performance of therapeutic IgE.著者: Francesca Marano / Callum McKenzie / James R Birtley / Sadaf A Hussain / Olivia Macleod / Alexander Goodacre / Shuang Wu / Oliver E Amin / Nikhil Faulkner / John Devlin / Liam Regan / Komal ... 著者 : Francesca Marano / Callum McKenzie / James R Birtley / Sadaf A Hussain / Olivia Macleod / Alexander Goodacre / Shuang Wu / Oliver E Amin / Nikhil Faulkner / John Devlin / Liam Regan / Komal Soni / Rachel M Johnson / Valerie E Pye / Tim Wilson / Elizabeth Hardaker / Kevin FitzGerald / 要旨 : IgE antibodies exert strong immunostimulatory effects and their anti-tumour effectiveness is currently being assessed in clinical trials. The high affinity of IgE for FcεRI may result in the binding ... IgE antibodies exert strong immunostimulatory effects and their anti-tumour effectiveness is currently being assessed in clinical trials. The high affinity of IgE for FcεRI may result in the binding of exogenously delivered antibody to effector cells prior to antigen engagement, potentially leading to IgE being presented multivalently to cancer cells. With the presumed higher avidity of antigen binding it is unclear whether increasing monovalent affinity of IgE improves anti-tumour functionality. To address this, we affinity-matured an anti-HER2 IgE, generating 12 clones with increased affinity for HER2. These clones were more potent than the parental antibody in inducing mast cell degranulation, with the most potent, EPS 232, achieving enhanced antibody-dependent cytotoxicity and phagocytosis of HER2-expressing cancer cells. EPS 232 delivered superior tumour growth inhibition in vivo, including in models expressing ultra-low levels of HER2, and it promoted greater infiltration of T cells and macrophages into tumours. These findings suggest that for therapeutic IgE, increasing antigen-binding affinity can lead to functional enhancements. 履歴 登録 2025年10月29日 - ヘッダ(付随情報) 公開 2026年3月11日 - マップ公開 2026年3月11日 - 更新 2026年4月15日 - 現状 2026年4月15日 処理サイト : PDBe / 状態 : 公開
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