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-Structure paper
| タイトル | Selective targeting of oncogenic hotspot mutations of the HER2 extracellular domain. |
|---|---|
| ジャーナル・号・ページ | Nat Chem Biol, Vol. 21, Issue 5, Page 706-715, Year 2025 |
| 掲載日 | 2024年10月22日 |
著者 | Injin Bang / Takamitsu Hattori / Nadia Leloup / Alexis Corrado / Atekana Nyamaa / Akiko Koide / Ken Geles / Elizabeth Buck / Shohei Koide / ![]() |
| PubMed 要旨 | Oncogenic mutations in the extracellular domain (ECD) of cell-surface receptors could serve as tumor-specific antigens that are accessible to antibody therapeutics. Such mutations have been ...Oncogenic mutations in the extracellular domain (ECD) of cell-surface receptors could serve as tumor-specific antigens that are accessible to antibody therapeutics. Such mutations have been identified in receptor tyrosine kinases including HER2. However, it is challenging to selectively target a point mutant, while sparing the wild-type protein. Here we developed antibodies selective to HER2 S310F and S310Y, the two most common oncogenic mutations in the HER2 ECD, via combinatorial library screening and structure-guided design. Cryogenic-electron microscopy structures of the HER2 S310F homodimer and an antibody bound to HER2 S310F revealed that these antibodies recognize the mutations in a manner that mimics the dimerization arm of HER2 and thus inhibit HER2 dimerization. These antibodies as T cell engagers selectively killed a HER2 S310F-driven cancer cell line in vitro, and in vivo as a xenograft. These results validate HER2 ECD mutations as actionable therapeutic targets and offer promising candidates toward clinical development. |
リンク | Nat Chem Biol / PubMed:39438724 |
| 手法 | EM (単粒子) |
| 解像度 | 2.61 - 2.67 Å |
| 構造データ | EMDB-43439, PDB-8vqd: EMDB-43440, PDB-8vqe: |
| 由来 |
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キーワード | SIGNALING PROTEIN / HER2 / Fab / Tyrosine kinase receptor / Receptor tyrosine kinase / oncogenic mutation |
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