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-Structure paper
| タイトル | Autopalmitoylation of IDH1-R132H regulates its neomorphic activity in cancer cells. |
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| ジャーナル・号・ページ | Nat Chem Biol, Vol. 22, Issue 7, Page 1087-1098, Year 2026 |
| 掲載日 | 2026年1月13日 |
著者 | Lu Hu / Jinyu Lin / Liping Sun / Alison M Berezuk / Katharine S Tuttle / Xing Zhu / Hyuk-Soo Seo / Sirano Dhe-Paganon / Pan Li / Yang Sun / Lisheng Ni / Jianan Zhang / Dazhi Tan / Hiroaki Wakimoto / Daniel P Cahill / Xiaochen Bai / Xuelian Luo / John M Asara / Sriram Subramaniam / Yibing Shan / Xu Wu / ![]() |
| PubMed 要旨 | Gain-of-function mutations of isocitrate dehydrogenase 1 (IDH1) lead to oncometabolite (R)-2-hydroxyglutarate production, contributing to the tumorigenesis of multiple human cancers. While fatty acid ...Gain-of-function mutations of isocitrate dehydrogenase 1 (IDH1) lead to oncometabolite (R)-2-hydroxyglutarate production, contributing to the tumorigenesis of multiple human cancers. While fatty acid biosynthesis is critical for IDH1-mutant tumor growth, the underlying mechanisms remain unclear. Here, leveraging chemical probes and chemoproteomic profiling, we identified that oncogenic IDH1-R132H is uniquely autopalmitoylated at C269, which is not observed in wild-type IDH1. This modification responds to fatty acids and regulates R132H enzymatic activity by enhancing substrate and cofactor binding, as well as dimerization. Loss of C269 palmitoylation reverses IDH1-R132H-induced metabolic reprogramming and hypermethylation phenotypes and impairs cell transformation. Interestingly, C269 autopalmitoylation occurs within a hydrophobic pocket, targeted by a clinical IDH1-mutant inhibitor (LY3410738). Our study reveals that autopalmitoylation, conferred by the IDH1 mutation, links fatty acid metabolism to the regulation of IDH1 mutant activity and represents a druggable vulnerability in IDH1-mutant cancers. |
リンク | Nat Chem Biol / PubMed:41530531 |
| 手法 | EM (単粒子) |
| 解像度 | 2.69 - 2.85 Å |
| 構造データ | EMDB-72964, PDB-9yha: EMDB-72965, PDB-9yhb: |
| 化合物 | ![]() ChemComp-NAP: |
| 由来 |
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キーワード | CYTOSOLIC PROTEIN / Dehydrogenase / cellular metabolism / oxidative decarboxylation |
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