对于CLASP本地化,需要一个非常规的TOG域
Nelly Gareil1, Alison Gervais1, Nicolas Macaisne1
1Université Paris Cité, CNRS, Institut Jacques Monod, 75013 Paris, France.
Current biology : CB
|July 29, 2023
概括
细胞质链体相关蛋白 (CLASPs) 对于细胞迁移和分裂至关重要. 这项研究揭示了CLASP的C终端域可以在结构上被建模为TOG域,解释它们多样化的细胞作用.
科学领域:
- 细胞生物学 细胞生物学
- 结构生物学 结构生物学
- 分子细胞生物学 分子细胞生物学
背景情况:
- 细胞质链体关联蛋白 (CLASP) 是微管相关的蛋白质,对微管动力学至关重要.
- 通过促进救援和抑制灾难,CLASP调节微管的生长.
- 它们的功能涉及瘤过度表达基因 (TOG) 域和保护的C端域 (CTD) 蛋白相互作用.
研究的目的:
- 为了结构性地描述CLASP的保存C端域 (CTD).
- 阐明CLASP多样化的亚细胞局部化和相互作用的结构基础.
主要方法:
- 对CLASPCTD的结构建模.
- 确定参与蛋白相互作用的关键残留物.
- 在迁移和分裂细胞中分析CLASP相互作用.
主要成果:
- 在结构上,CLASP CTD可以被建模为TOG域.
- 保存的表面暴露的氨酸残留物对于CTD与伙伴蛋白的相互作用至关重要.
- 这种结构洞察力解释了CLASP是如何被引导到各种亚细胞位置的.
结论:
- 克拉斯普CTD与TOG域具有结构上的相似性.
- 在CTD中的特定氨酸残留物对于调解与结合伙伴的相互作用至关重要.
- 这为CLASP在细胞迁移,戈尔吉组织和染色体分离中的作用提供了一个结构机制.
相关概念视频
Termination of Translation
25.5K
The large ribosomal subunit has several important structures essential to translation. These include the peptidyl transferase center (PTC) - which is the site where the peptide bond is formed - and a large, internal, water-filled tube through which the nascent polypeptide moves. This latter structure is called the Peptide Exit Tunnel, and it begins at the PTC and spans the body of the large ribosomal subunit. During translation, as the nascent polypeptide chain is synthesized, it passes through...
25.5K
Ligand Binding and Linkage
4.8K
Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked. In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence...
4.8K
Ligand Binding Sites
7.8K
7.8K
Initiation of Translation
34.1K
Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are all required to assemble on the initiation codon of mRNA. This process consists of several steps that are mediated by different eIFs.
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
34.1K
Transposons
59
Transposons, or "jumping genes," are small mobile genetic elements (MGEs) that range from 700 to 40,000 base pairs in length. They are found in all organisms and can move within the same chromosome or transfer to different chromosomes. In some cases, transposons can also jump between different host DNA molecules, such as plasmids or viruses, contributing to genetic variability.Barbara McClintock first discovered these mobile genetic elements in the 1940s while studying maize genetics, and she...
59
Conservation of Protein Domains
3.1K
3.1K


