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-Structure paper
| タイトル | An O-glycopeptide participates in the formation of distinct Aβ fibril structures and attenuates Aβ neurotoxicity. |
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| ジャーナル・号・ページ | Nat Commun, Vol. 16, Issue 1, Page 5815, Year 2025 |
| 掲載日 | 2025年7月1日 |
著者 | Qijia Wei / Dangliang Liu / Wencheng Xia / Fengzhang Wang / Lu Huang / Jun Zhang / Xiaoya Wang / Zhongxin Xu / Changdong He / Wenzhe Li / Xiaomeng Shi / Chu Wang / Yuan Liu / Cong Liu / Suwei Dong / ![]() |
| PubMed 要旨 | The self-assembly of biomolecules through noncovalent interactions is critical in both physiological and pathological processes, as exemplified by the assembly of amyloid β peptide (Aβ) into ...The self-assembly of biomolecules through noncovalent interactions is critical in both physiological and pathological processes, as exemplified by the assembly of amyloid β peptide (Aβ) into oligomers or fibrils in Alzheimer's disease (AD). Developing molecules that can modulate this assembly process holds significant mechanistic and therapeutic potential. In this study, we identified glycopeptides as a class of protein aggregation modulators, showing that β-N-acetylgalactosamine (β-GalNAc)-modified Aβ promotes Aβ fibrillation while reducing its toxic oligomers. Using biochemical assays, cryo-EM, and molecular dynamics simulations, we demonstrated that β-GalNAc-modified Aβ coassembles with Aβ, forming unique fibril structures stabilized by both hydrophobic interactions and an organized hydrogen bond network facilitated by the glycopeptide. Importantly, β-GalNAc-modified Aβ can alleviate the neurotoxicity of Aβ in neuronal cells and an AD male mouse model. These findings underscore the potential of glycopeptides in regulating amyloid aggregation and provide structural insights for designing molecules targeting amyloid-related pathologies. |
リンク | Nat Commun / PubMed:40593714 / PubMed Central |
| 手法 | EM (らせん対称) |
| 解像度 | 2.6 - 3.7 Å |
| 構造データ | EMDB-61944, PDB-9k0d: EMDB-61945, PDB-9k0e: EMDB-61946, PDB-9k0f: ![]() EMDB-63403: Cryo-EM density map of Amyloid-beta42 WT |
| 化合物 | ![]() ChemComp-HOH: |
| 由来 |
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キーワード | MEMBRANE PROTEIN / helical fibril / amyloid-beta / PROTEIN FIBRIL |
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homo sapiens (ヒト)
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