对小EV蛋白质组的分析揭示了由VAP-A调节的独特功能蛋白质网络
Bahnisikha Barman1,2, Marisol Ramirez3, Toni Renee Dawson1,2
1Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA.
Proteomics
|November 5, 2023
概括
囊泡相关蛋白A (VAP-A) 调节RNA丰富的细胞外囊泡 (EV) 蛋白质载荷. 在小型EV (SEV) 中,VAP-A敲击降低了核糖体,结合体和RNA运输蛋白.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 细胞外囊泡 (EVs) 通过蛋白质,核酸和脂质载体进行细胞间通信.
- EV异质性源于人们对生物生成途径的理解不足.
- 囊泡相关蛋白A (VAP-A),一个内细胞网膜 (ER) 膜接触部位 (MCS) 蛋白,驱动着RNA丰富的EVs的生物发生.
研究的目的:
- 调查VAP-A规范电动汽车的蛋白质载荷.
- 根据VAP-A水平分别分类为小EV (SEV) 的蛋白质.
主要方法:
- 无标签蛋白质组学被用来分析来自VAP-A淘汰 (KD) 结肠癌细胞的SEV.
- 基因组丰富分析 (GSEA) 确定了不同排序的蛋白质类.
- STRING蛋白质-蛋白质相互作用网络分析评估了RNA结合蛋白 (RBP) 的功能机制.
主要成果:
- 蛋白质组学确定了SEV中从VAP-A KD细胞下调或上调的蛋白质.
- GSEA揭示了对SEVs的蛋白质类的VAP-A依赖差异分类.
- VAP-A KD SEVs显示了核糖体,结合体,mRNA监测和RNA运输蛋白的减少.
- 还观察到对卡德林结合,未折叠蛋白结合和依赖ATP的蛋白质网络的下调.
结论:
- VAP-A影响SEV的蛋白质组成,特别是影响与RNA相关的功能机械.
- 这些发现为EV生物发生和货物分类的机制提供了洞察力.
- VAP-A是蛋白质分类成特定EV子集的关键调节者.
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