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-Structure paper
| タイトル | Mechanism and Structure-Guided Optimization of SLC1A1/EAAT3-Selective Inhibitors in Kidney Cancer. |
|---|---|
| ジャーナル・号・ページ | bioRxiv, Year 2025 |
| 掲載日 | 2025年7月7日 |
著者 | Pooneh Koochaki / Biao Qiu / Jesse A Coker / Alexander Earsley / Nancy S Wang / Todd Romigh / Christopher M Goins / Shaun R Stauffer / Olga Boudker / Abhishek A Chakraborty / ![]() |
| PubMed 要旨 | Renal Cell Carcinomas (RCCs) depend metabolically on the trimeric sodium-coupled aspartate and glutamate transporter, SLC1A1/EAAT3; however, pharmacologically targeting SLC1A1 is challenging. We ...Renal Cell Carcinomas (RCCs) depend metabolically on the trimeric sodium-coupled aspartate and glutamate transporter, SLC1A1/EAAT3; however, pharmacologically targeting SLC1A1 is challenging. We determined a cryo-EM structure of human SLC1A1 bound to compound , a recently described SLC1A1-selective bicyclic imidazo[1,2-α]pyridine-3-amine (BIA) inhibitor. binds a membrane-embedded, allosteric pocket accessible only in the state, when SLC1A1 is unbound to substrate and sodium. Wedged between the trimerization domain and the substrate-binding transport domain, together with a cholesterol moiety from the lipid bilayer, likely prevents sodium and substrate binding, and blocks SLC1A1's elevator-like movements that are essential for transport. Mutations in this pocket abolish binding and counteract 's cytotoxicity in RCC cells, confirming on-target activity and explaining SLC1A1 selectivity. A structure-guided medicinal chemistry effort yielded two new, SLC1A1-selective BIA derivatives, PBJ1 and PBJ2, with enhanced cytotoxicity resulting from the inhibition of SLC1A1-dependent aspartate, glutamate, and cysteine metabolic pathways. |
リンク | bioRxiv / PubMed:40672197 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.56 - 2.83 Å |
| 構造データ | EMDB-71288, PDB-9p4x: EMDB-71289, PDB-9p4y: EMDB-71290, PDB-9p4z: |
| 化合物 | ![]() PDB-1cg9: ![]() ChemComp-CLR: ![]() ChemComp-HOH: ![]() ChemComp-9Z9: ![]() ChemComp-NA: |
| 由来 |
|
キーワード | TRANSPORT PROTEIN / hEAAAT3 / allosteric inhibitor / Sodium bound |
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