内核膜中的VAPA会影响核层和核形态
Inés Rodríguez-González1, David Kohlhause1, Christof Lenz2,3
1Department of Molecular Biology, Faculty of Medicine, GZMB, Georg-August-University Göttingen, Humboldtallee 23, 37073 Göttingen, Germany.
囊泡关联膜蛋白关联蛋白A (VAPA) 定位到内核膜,揭示了新的核功能. VAPA的枯竭影响了核形态学和基因素乙化,这表明其作用超出了ER组织范围.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 蛋白质组学是指蛋白质组学.
背景情况:
- 众所周知,囊泡相关膜蛋白相关蛋白A (VAPA) 组织了内分泌网膜 (ER) 并参与了膜接触部位 (MCS).
- 精确的VAPA在核中的定位和功能在很大程度上仍未被探索.
研究的目的:
- 为了调查VAPA的核定位.
- 为了确定VAPA的核相互作用伙伴.
- 阐明VAPA在核结构和功能中的作用.
主要方法:
- 免疫光显微镜以确定VAPA局部化.
- 蛋白质组学使用"依赖rapamycin和APEX的SILAC蛋白质鉴定" (RAPIDS) 来识别VAPA的核近距离合作伙伴.
- 在细胞系统中进行VAPA耗尽研究.
- 对核形态和基因素乙化水平的分析.
主要成果:
- 发现VAPA局限于内核膜 (INM),靠近核层,INM蛋白和核蛋白.
- 快速检测确定了埃梅林,LAP2异型,拉胺AC和Nup153作为VAPA的核近距离合作伙伴.
- VAPA的耗尽导致了核层水平的降低,异常的核形态 (阴道,道) 和改变的基因素乙化.
结论:
- 在内核膜中,VAPA具有以前未知的功能.
- VAPA在维持核结构和潜在的表观遗传调节方面发挥着作用.
- 这些发现扩大了VAPA已知的功能,超出了它在ER组织中的既定作用.
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