由氨酸或溶解脂诱导的陶脉动显示出不同的初始寡合体形成
Helena Østergaard Rasmussen1, Janni Nielsen2, Angela de Poli2
1Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus C, Denmark; Department of Chemistry, Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus C, Denmark.
Journal of molecular biology
|July 12, 2023
概括
Lysophosphatidylglycerol (LPG) 和肝素,但不是LPC,诱导陶蛋白纤维化. 这些辅助因子启动明显的结构变化,导致类似的纤维细胞尺寸,并为神经退行性疾病的治疗策略提供信息.
科学领域:
- 神经科学是一个神经科学.
- 生物化学 生物化学
- 结构生物学 结构生物学
背景情况:
- 蛋白与阿尔茨海默氏症等神经退行性疾病有关.
- 病理,包括纤维化,与疾病进展相关.
- 在体内,与脂和糖氨基酸糖相互作用.
研究的目的:
- 为了研究 lysophospholipids 和 heparin 诱导陶纤维化的原因.
- 阐明受辅因子影响的纤维化的结构机制.
- 了解治疗标识的早期纤维化状态.
主要方法:
- 生物物理技术:小角度X射线散射 (SAXS),提奥夫拉T光,SDS-PAGE.
- 时间解析数据收集用于纤维化阶段的结构分析.
- 调查tau与1-myristoyl-2-hydroxy-sn-glycero-3-phosphocholine (LPC),1-myristoyl-2-hydroxy-sn-glycero-3-phospho-(1'-rac-glycerol) (LPG) 和肝素的相互作用.
主要成果:
- LPC没有诱导陶纤维化或相互作用.
- 低度的液化天然气通过疏水集群促进了纤维化;较高度形成了核心-外复合体.
- 氨酸诱导了松散关联的陶寡合物的快速形成.
- 由LPG或肝素诱导的纤维呈现出相似的横截面尺寸.
- 对于LPG和肝素诱导的色素,观察到对SDS耐药的寡合体.
结论:
- 纤维化可以由生物相关的辅因子LPG和肝素启动.
- 不同的辅助因子导致不同的初始tau结构,但融合纤维的横截面.
- 了解早期动状态对于理解体内发作和开发抗动药物至关重要.
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