在老化蛋白质组中的三氧化氨酸模仿了酸化氨酸的结构动态和相互作用
Jose Antonio Sánchez Milán1,2, María Fernández-Rhodes1,2, Xue Guo3
1Biomedical Research Institute of Lleida (IRBLLEIDA) - +Pec Proteomics Research Group (+PPRG) - Neuroscience Area, University Hospital Arnau de Vilanova (HUAV), Lleida, Spain.
Aging cell
|December 19, 2023
概括
衰老加速蛋白质损伤,三氧化氨酸 (t-Cys) 积累并影响细胞信号,类似于异常的血清酸化 (p-Ser). 这揭示了氧化应激和老化中的酸化之间的关键相互作用.
科学领域:
- 分子生物学分子生物学
- 老年学是指老年学的学科.
- 生物化学 生物化学
背景情况:
- 衰老是慢性疾病的主要风险因素,与诸如退行性蛋白质修饰 (DPM) 等分子变化有关.
- 异常的血清酸化 (p-Ser) 对细胞信号产生影响,而三氧化氨酸 (t-Cys) 积累与氧化应激诱导的疾病有关.
- 在衰老过程中p-Ser和t-Cys之间的功能相互作用在很大程度上仍未被探索.
研究的目的:
- 在两年内全面分析小鼠的衰老蛋白质组.
- 研究三氧化氨酸 (t-Cys) 在衰老过程中对细胞信号和蛋白质结构的影响.
- 探索老化蛋白质组中的t-Cys和p-Ser之间的交叉效应和功能相互作用.
主要方法:
- 在2年的时间里,对野生型C57BL/6NTac小鼠蛋白质的高级蛋白质学和生物信息学分析.
- 在体外验证t-Cys和p-Ser相互作用酶之间的相互作用.
- 通过t-Cys和p-Ser修饰的蛋白质的比较结构分析.
主要成果:
- 在老化蛋白质组中观察到三氧化氨酸 (t-Cys) 残留物的积累.
- 发现t-Cys残留物与酶相互作用,这些酶也与异常的血清酸化 (p-Ser) 修饰相互作用.
- 发现t-Cys引起的结构变化与p-Ser引起的结构变化相似.
结论:
- 在衰老过程中,三氧化氨酸 (t-Cys) 的积累会影响细胞信号通路,反映出异常血清酸化 (p-Ser) 的效应.
- 这项研究揭示了氧化应激 (t-Cys) 和酸化 (p-Ser) 在衰老过程中的显著相互作用.
- 这些发现为研究这些蛋白质修饰在与年龄相关的慢性疾病中的作用开辟了新的研究途径.
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