在等离子膜中,RAS GTPases和叶片间合
Junchen Liu1, Neha Arora1, Yong Zhou2,3
1Department of Integrative Biology and Pharmacology, McGovern Medical School, University of Texas Health Science Center, Houston, Texas 77030, USA.
Cold Spring Harbor perspectives in biology
|July 18, 2023
概括
在癌症中至关重要的RAS蛋白在血膜上发出信号. 本综述探讨了RAS-脂质相互作用和叶片间合如何影响癌症信号和瘤微环境.
科学领域:
- 分子细胞生物学 分子细胞生物学
- 癌症生物学 癌症生物学
- 生物物理学的生物物理.
背景情况:
- 在各种癌症中,RAS基因经常发生突变.
- RAS蛋白主要从等离子体膜 (PM) 的内部小册子发出信号.
- 了解PM的独特环境是RAS功能的关键.
研究的目的:
- 审查在血膜上的RAS-脂质相互作用.
- 为了探索RAS信号中的叶片间合机制.
- 了解RAS如何将细胞外线与细胞内信号结合起来.
主要方法:
- 超高分辨率成像成像技术
- 分子动态模拟的分子动态模拟.
- 生物物理测定试验
主要成果:
- RAS蛋白质对特定的脂质进行分类,并在内部的PM上形成信号纳米集群.
- RAS蛋白感知并响应PM外侧传单的组件.
- 叶间合允许细胞外和细胞内信息的整合.
结论:
- 拉斯-脂质相互作用和叶片间合对于拉斯信号传递至关重要.
- 突变RAS可以通过PM通信修改瘤微环境.
- 对PM通信机制的进一步研究是有必要的.
相关概念视频
Small GTPases - Ras and Rho
4.0K
Ras and Rho are small monomeric GTPases that act downstream of receptor tyrosine kinase (RTK) and regulate various cellular processes. These GTPases switch between active and inactive states by binding to guanine nucleotides.
Three regulatory proteins control their activity:
Three regulatory proteins control their activity:
4.0K
GTPases and their Regulation
8.4K
Guanine nucleotide-binding proteins (G-proteins), also known as GTPases, are a superfamily of proteins that regulate many cellular processes, such as cell signaling, vesicular transport, and the regulation of cell shape and motility. Mutation or dysfunction of these proteins can lead to disease. There are around 40,000 known G-proteins that can broadly be classified into two groups ‒ small G-proteins consisting of a single domain and large multi-domain G-proteins.
Large G-proteins,...
Large G-proteins,...
8.4K
IP3/DAG Signaling Pathway
12.2K
Membrane lipids such as phosphatidylinositol (PI) are precursors for several membrane-bound and soluble second messengers. Specific kinases phosphorylate PI and produce phosphorylated inositol phospholipids. One such inositol phospholipids are the phosphatidylinositol-4,5 bisphosphate [PI(4,5)P2], present in the inner half of the lipid bilayer. Upon ligand binding, GPCR stimulates Gq proteins to turn on phospholipase Cꞵ. Activated phospholipase Cꞵ cleaves PI(4,5)P2 and...
12.2K
Rab Cascades
2.7K
Rab GTPases act in a regulated cascade during membrane fusion, helping the lipid bilayers mix. The Rab family of proteins are active when bound to GTP, and inactive when bound to GDP. Hence, they act as guanine nucleotide-dependent molecular switches. Rab-GTP recognizes and binds to long or short-range tethering proteins to capture the target vesicle. These tethers coordinate with SNAREs on the vesicle and the target membrane to assemble the trans SNARE complex that locks the mixing bilayers.
2.7K
Activation and Inactivation of G Proteins
7.3K
Heterotrimeric G proteins are guanine nucleotide-binding proteins. As the name suggests, heterotrimeric G proteins are composed of three subunits: alpha, beta, and gamma. They remain GDP-bound or GTP-bound inside the cells and switch between inactive/active states. The Gα subunit possesses the nucleotide-binding pocket that binds guanine nucleotides and switches between GDP or GTP-bound states. In contrast, the Gꞵ and Gγ subunits are always bound together with high...
7.3K
Coat Assembly and GTPases
3.6K
Vesicles incorporate different coat protein subunits in different cell locations, which changes the properties of the coat, such as the shape and geometry of the transport vesicles. Thus, vesicle coat proteins also play a significant role in cargo selection.
Coat assembly depends on the local availability of phosphatidylinositol phosphates or PIPs and GTP-binding proteins. Adaptor proteins, which link the coat proteins to the membrane, bind to these PIPs and play a crucial role in controlling...
Coat assembly depends on the local availability of phosphatidylinositol phosphates or PIPs and GTP-binding proteins. Adaptor proteins, which link the coat proteins to the membrane, bind to these PIPs and play a crucial role in controlling...
3.6K


