在脂肪酸应激下,PML异型I和II的近距离互动组在脂肪酸应激下
Jordan Thompson1, François-Michel Boisvert2, Jayme Salsman3
1Department of Biochemistry & Molecular Biology, Dalhousie University, Halifax, Canada.
FEBS letters
|December 20, 2024
概括
脂肪酸的压力改变了Promyelocytic白血病 (PML) 的核体. 近距离标记确定了与PML NBs相互作用的COPII运输蛋白,揭示了由油酸盐引起的干扰.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 蛋白相互作用 蛋白相互作用
背景情况:
- 甲状腺白血病 (PML) 蛋白质是PML核体 (PML NB) 的关键支架.
- 在脂肪酸应激条件下,PML NBs可以重组为脂质相关的PML结构 (LAPS).
- 了解细胞组件在压力下如何与PML NB相互作用,对于细胞平衡至关重要.
研究的目的:
- 为了研究由脂肪酸油酸盐诱导的PML蛋白互动组的变化.
- 为了确定受脂肪酸压力影响的PML NB的特定蛋白质合作伙伴.
- 阐明COPII运输蛋白在PML NB结构和功能中的作用.
主要方法:
- 在U2OS细胞中利用近距离标记与甲酸盐过氧化酶 (APEX2) 融合到PMLI和PMLII.
- 分析了由此产生的互动组,以确定蛋白质与蛋白质的关联.
- 采用近距离结合试验 (PLA) 来验证COPII蛋白和PMLNB之间的特定相互作用.
主要成果:
- 在油性应激下,PMLI/PMLII的互动组包括ESCRT和COPII运输蛋白的节点.
- COPII蛋白质SEC23B,SEC24A和USO1显示与PML具有优先关联 NB.
- USO1的核定位依赖于PML,而SEC23B和SEC24A的定位不受PML淘汰的直接影响.
结论:
- 近距离标记成功地确定了COPII运输蛋白和PMLNB之间的相互作用.
- 脂肪酸压力,特别是油酸,破坏了这些已识别的COPII-PML NB相互作用.
- 这些发现强调了COPII运输在调节在代谢压力下PML NB完整性方面的新作用.
关键词:
在APEX2中,APEX2是APEX2的第二个版本.COPIIII COPIIII 这是一个很大的问题.与脂质相关的PML结构核脂液滴子 核脂液滴子孕细胞性白血病 (Promyelocytic Leukemia) 是一种致癌的疾病.靠近依赖的生物素识别.更多相关视频
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