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-Structure paper
| タイトル | High-Affinity, Structure-Validated and Selective Macrocyclic Peptide Tools for Chemical Biology Studies of Huntingtin. |
|---|---|
| ジャーナル・号・ページ | bioRxiv, Year 2025 |
| 掲載日 | 2025年8月6日 |
著者 | Esther Wolf / Rebeka Fanti / Tatsuya Ikenoue / Justin C Deme / Swati Balakrishnan / Brandon A Keith / Matthew G Alteen / Renu Chandrasekaran / Manisha Yadav / Ritika Bhajiawala / Suzanne Ackloo / Jia Feng / Mahmoud A Pouladi / Aled M Edwards / Derek Wilson / Susan M Lea / Hiroaki Suga / Rachel J Harding / ![]() |
| PubMed 要旨 | Huntington's disease (HD) is a fatal neurodegenerative disorder caused by a CAG repeat expansion in the () gene, with no disease-modifying therapies currently available. The precise molecular ...Huntington's disease (HD) is a fatal neurodegenerative disorder caused by a CAG repeat expansion in the () gene, with no disease-modifying therapies currently available. The precise molecular function of the HTT protein is unclear, and the lack of selective chemical tools has limited functional studies. We have identified and characterized macrocyclic peptide binders targeting HTT. These binders exhibit low-nanomolar affinity and engage distinct HTT and HTT-HAP40 interfaces, as revealed by hydrogen-deuterium exchange mass spectrometry and cryo-electron microscopy. Chemoproteomics confirmed selective binding in cell extracts from wildtype but not HTT-null cell lines. HAP40 consistently and stoichiometrically co-purified with HTT across cell lines, including with HTT variants containing different CAG repeat lengths, highlighting the broad presence of the HTT-HAP40 complex. |
リンク | bioRxiv / PubMed:41030958 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.1 - 2.3 Å |
| 構造データ | EMDB-71743, PDB-9pmw: EMDB-71744, PDB-9pn0: |
| 由来 |
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キーワード | PEPTIDE BINDING PROTEIN / Huntingtin / Macrocycles / Polyglutamine expansion |
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homo sapiens (ヒト)
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