ジャーナル: Sci Adv / 年: 2025 タイトル: Structural analysis of HER2-trastuzumab complex reveals receptor conformational adaptation. 著者: Santiago Vacca / Marcos Gragera / Alejandro Buschiazzo / David Herreros / James M Krieger / Santiago Bonn-Garcia / Roberto Melero / Carlos Os Sorzano / Jose M Carazo / Ohad Medalia / Andreas Plückthun / 要旨: Human epidermal growth factor receptor-2 (HER2) is a receptor tyrosine kinase, associated with a variety of malignant tumors, usually through overexpression, resulting in aberrant signaling. ...Human epidermal growth factor receptor-2 (HER2) is a receptor tyrosine kinase, associated with a variety of malignant tumors, usually through overexpression, resulting in aberrant signaling. Trastuzumab (TZB), one of the monoclonal antibodies (mAbs) used in combination with chemotherapy, has become a major therapeutic for HER2-overexpressing cancers. Current structural understanding of HER2 and its interactions with other receptors and with different affinity agents has relied on numerous structures of individual domains of HER2. Here, we subjected purified near full-length HER2 to single-particle cryo-electron microscopy (cryo-EM) analysis. Besides the canonical conformation described in previous structural studies, we report a previously unreported conformation of the HER2 extracellular domain that is stabilized upon TZB binding, which might hamper association with HER3, a receptor with which HER2 forms an oncogenic unit. Together, our findings provide insights into the conformational dynamics of the HER2 receptor and the mechanism of action of TZB.
全体 : HER2/ErbB2 extracellular domain (ECD) from a near full-length con...
全体
名称: HER2/ErbB2 extracellular domain (ECD) from a near full-length construct solubilized in amphipols.
要素
複合体: HER2/ErbB2 extracellular domain (ECD) from a near full-length construct solubilized in amphipols.
タンパク質・ペプチド: Receptor tyrosine-protein kinase erbB-2,Green fluorescent protein
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超分子 #1: HER2/ErbB2 extracellular domain (ECD) from a near full-length con...
超分子
名称: HER2/ErbB2 extracellular domain (ECD) from a near full-length construct solubilized in amphipols. タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all 詳細: The final reconstruction contains only the HER2 ECD.
由来(天然)
生物種: Homo sapiens (ヒト)
分子量
理論値: 112 KDa
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分子 #1: Receptor tyrosine-protein kinase erbB-2,Green fluorescent protein
分子
名称: Receptor tyrosine-protein kinase erbB-2,Green fluorescent protein タイプ: protein_or_peptide / ID: 1 詳細: Only the extracellular domain (residues from Q24 to C544) of the molecule was solved in the cryo-EM map,Only the extracellular domain (residues from Q24 to C544) of the molecule was solved in ...詳細: Only the extracellular domain (residues from Q24 to C544) of the molecule was solved in the cryo-EM map,Only the extracellular domain (residues from Q24 to C544) of the molecule was solved in the cryo-EM map,Only the extracellular domain (residues from Q24 to C544) of the molecule was solved in the cryo-EM map,Only the extracellular domain (residues from Q24 to C544) of the molecule was solved in the cryo-EM map.,Only the extracellular domain (residues from Q24 to C544) of the molecule was solved in the cryo-EM map,Only the extracellular domain (residues from Q24 to C544) of the molecule was solved in the cryo-EM map,Only the extracellular domain (residues from Q24 to C544) of the molecule was solved in the cryo-EM map,Only the extracellular domain (residues from Q24 to C544) of the molecule was solved in the cryo-EM map. コピー数: 1 / 光学異性体: LEVO / EC番号: receptor protein-tyrosine kinase