相关实验视频
Updated: Jul 10, 2026

06:17
Engineered 3D Silk-collagen-based Model of Polarized Neural Tissue
Published on: October 23, 2015
普莱克辛-神经林-1复合体形成功能性三林-3A受体
T Takahashi1, A Fournier, F Nakamura
1Department of Neurology, Yale University School of Medicine, New Haven, Connecticut 06510, USA.
Cell
|October 16, 1999
概括
赛马福林-3A (Sema3A) 与轴突的结合涉及神经平素-1 (NP-1) 和快素-1 (Plex 1) 的复合体. 这种NP-1/Plex 1复合体,而不是单独的NP-1,介导Sema3A.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
背景情况:
- 第1类和第3类的半法林是指导轴突的指导线索,它们介导排斥.
- 这些半蛋白与不同的细胞表面蛋白质结合,表明复杂的受体机制.
研究的目的:
- 为了研究plexin-1 (Plex 1) 和neuropilin-1 (NP-1) 之间的相互作用,以调解semaphorin-3A (Sema3A) 信号传输.
- 确定NP-1/Plex 1复合体在Sema3A诱导的细胞反应中的功能作用.
主要方法:
- 同免疫沉以评估蛋白质复合体的形成.
- 带结合测定测量以测量半氨酸亲和力.
- 使用附着细胞进行细胞形态分析.
- 在感官神经元中的主导负面方法.
- 同焦显微镜可视化蛋白质的再分配.
主要成果:
- 神经平素-1 (NP-1) 和快素-1 (Plex 1) 形成了一个稳定的复合体.
- 在NP-1/Plex 1复合体表现出比单独的NP-1更高的亲和力semaphorin-3A (Sema3A).
- 赛马3A与NP-1/Plex 1复合体结合会诱导细胞圆形化,与单独与NP-1结合不同.
- 主导阴性Plex 1抑制Sema3A诱导的生长的崩.
- 赛马3A治疗导致NP-1和plexin在生长中聚集.
结论:
- 生理学上的semaphorin-3A (Sema3A) 受体由神经皮林-1 (NP-1) /plexin-1 (Plex 1) 复合体组成.
- 这种复杂的形成对于Sema3A介导的轴突引导和细胞反应至关重要.
相关概念视频
Cytoskeletal Linker Proteins - Plakins
Plakins are large proteins with binding domains for microtubules, microfilaments, intermediate filaments, and membrane-associated protein complexes at cell junctions. Plakin functions are evolutionarily conserved and are primarily involved in organizing the different components of the cytoskeleton by crosslinking them to each other and connecting them to the cell-matrix and cell adhesion complexes. They are also known to interact with signal transducers, serve as scaffolds for signaling...
Mechanism of Filopodia Formation
Filopodia are thin, actin-rich cellular protrusions that play an important role in many fundamental cellular functions. They vary in their occurrence, length, and positioning in different cell types, suggesting their diverse roles.
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
Assembly of Signaling Complexes
Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
IP3/DAG Signaling Pathway
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 produces two-second...
Intracellular Signaling Affects Focal Adhesions
Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
Some...
Role of Ephrin-Eph Signalling in Intestinal Stem Cell Renewal
Erythropoietin-producing hepatocellular carcinoma receptor (Eph) and its ligand, Eph receptor-interacting protein (Ephrin) were first discovered in the human carcinoma cell line, hence the name. Ephrin-Eph interaction guides cells to reach their appropriate location in adult tissues. They also play an essential role in the immune system by helping in immune cell migration, adhesion, and activation. Based on their structure and function, Eph is divided into two classes — EphA and EphB.

