细胞应激后的核细胞重组是由SMN在核区间之间的穿调节的
Shaqraa Musawi1,2, Lise-Marie Donnio3, Zehui Zhao1
1Pathophysiology and Genetics of Neuron and Muscle (INMG-PGNM), CNRS UMR 5261, INSERM U1315, Université Claude Bernard Lyon 1, 68008, Lyon, France.
Nature communications
|November 15, 2023
概括
脊髓肌肉缩蛋白SMN对于在DNA损伤后恢复核结构至关重要. SMN从Cajal体中传播到细胞核,帮助修复和维持细胞功能.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 脊髓肌缩 (SMA) 是一种遗传性神经肌肉疾病,与生存运动神经元 (SMN) 基因突变有关.
- 该SMN蛋白对于细胞功能至关重要,并且存在于核Cajal体中,这些核体靠近核.
- 核球对核糖体生物发生至关重要,在对基因毒性压力的反应中经历结构变化.
研究的目的:
- 研究SMN蛋白在基因毒性压力后核细胞结构恢复中的作用.
- 了解DNA修复过程中SMN定位的动态.
- 确定影响SMN在核细胞平衡中的功能因素.
主要方法:
- 利用细胞模型研究核细胞结构和SMN蛋白质定位.
- 应用基因毒性压力来诱导DNA损伤和观察到的细胞反应.
- 研究了SMN枯竭和与Coilin和PRMT1相互作用对核组织的影响.
主要成果:
- 在基因毒性压力后,SMN蛋白对核细胞结构的完全恢复至关重要.
- 在DNA修复阶段,SMN从Cajal体动态地穿到细胞核.
- 这种SMN的核细胞招募取决于Coilin和PRMT1.1的酶活性.
结论:
- 在维持核细胞完整性和DNA损伤后的功能方面,SMN起着至关重要的作用.
- 将SMN运送到核细胞是确保细胞从基因毒性损伤中恢复的关键机制.
- 准SMN-Coilin-PRMT1相互作用可能为SMA和相关核细胞功能障碍提供治疗途径.
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