PRC1蛋白子复合体架构:专注于蛋白互动网络中不同PCGF子单元之间的相互作用
Nayla Munawar1, Kieran Wynne2,3, Giorgio Oliviero3
1Department of Chemistry, College of Science, United Arab Emirates University, Al Ain 15551, United Arab Emirates.
International journal of molecular sciences
|September 28, 2024
概括
这项研究研究了多聚抑制剂复合体1 (PRC1) 相互作用,揭示了不同的PCGF蛋白子单元如何影响细胞功能和染色质调节. 了解这些网络是表观遗传调节研究的关键.
科学领域:
- 表观遗传学和染色体生物学
- 分子细胞生物学 分子细胞生物学
- 蛋白质组学是指蛋白质组学.
背景情况:
- 聚合体抑制器综合体1 (PRC1) 包含6个PCGF蛋白子单元 (PCGF1-6) 定义不同的子综合体.
- 虽然PRC1亚复合体在表观遗传调节中具有专门的作用,但它们多样化的蛋白相互作用网络仍然不完全理解.
研究的目的:
- 在PRC1复合体内定义PCGF1,PCGF2和PCGF4子单元的互动体.
- 阐明与多能细胞中这些PCGF子单元相关的潜在细胞功能和调节网络.
主要方法:
- 在人类胚胎癌细胞中对PCGF1,PCGF2和PCGF4进行亲和净化质谱 (AP-MS) 查 (NT2).
- 对已识别的蛋白质相互作用体进行生物信息分析.
- 评估PCGF子单元之间的mRNA和蛋白质水平调节.
- 在PCGF子单元中断后细胞增殖的分析.
主要成果:
- 确定了PCGF1,PCGF2和PCGF4的新型蛋白质相互作用体,参与了包括细胞生物学和染色质调节在内的多种功能途径.
- 在研究的PCGF子单元中,揭示了mRNA和蛋白质水平的相互调节的证据.
- 证明这些PCGF子单元的破坏导致细胞增殖显著减少.
结论:
- 含PCGF的PRC1复合物的组成多样性有助于它们在细胞网络中的各种角色.
- PCGF蛋白质在将表观遗传调节与更广泛的细胞功能相结合并维持细胞增殖方面发挥着至关重要的作用.
相关概念视频
Protein Complexes with Interchangeable Parts
2.5K
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
2.5K
Assembly of Signaling Complexes
5.7K
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,...
5.7K
Protein-protein Interfaces
12.5K
Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
12.5K
Protein Complex Assembly
10.6K
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Many viruses self-assemble into a fully functional unit using the infected host cell to...
10.6K
Protein Networks
3.9K
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
3.9K
Covalently Linked Protein Regulators
1.6K
1.6K


