PCM支架使RNA局部化到中心体成为可能
Junnan Fang1,2, Weiyi Tian2,3, Melissa A Quintanilla4
1Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322.
bioRxiv : the preprint server for biology
|March 12, 2024
概括
研究人员发现了Pericentrin类蛋白 (Plp) mRNA如何被运送到中心体. 这项研究表明,Plp编码序列通过共同翻译运输驱动这种局部化,这对于细胞分裂和基因组稳定性至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 中心体是关键的微管组织中心,对于细胞分裂和基因组稳定至关重要.
- 中心细胞中围心物质 (PCM) 的组合是动态的,细胞周期受调节.
- 特定的mRNA,如中蛋白样蛋白 (Plp) mRNA,在中心体中被丰富,但它们的局部化机制尚不清楚.
研究的目的:
- 调查Plp mRNA到中心体的亚细胞局部化的机制.
- 为了识别Plp mRNA中负责其中枢体向的序列元素.
- 了解RNA在中心体的局部化如何与PCM组装和功能有关.
主要方法:
- 胺素敏感性测试以评估翻译在mRNA定位中的作用.
- 分析Plp mRNA编码序列的定位决定因素.
- 研究参与PCM支架形成的蛋白质-蛋白质相互作用及其对RNA局部化的影响.
主要成果:
- Plp mRNA局部化到中心体对胺素敏感,这表明一个协同翻译的运输机制.
- Plp mRNA的编码序列对于其局部化既必要又足够.
- 在Plp编码序列中的特定区域被确定为mRNA局部化的调节者.
- 形成PCM支架的蛋白质与蛋白质相互作用允许RNA定位在中心体.
结论:
- 这项研究阐明了推动Plp mRNA定位到中心体的分子机制.
- 由Plp编码序列调节的同翻译运输是RNA向中心体的关键机制.
- 这些发现提供了关于RNA在中心体的动态调节及其在PCM组织中的作用的见解.
相关概念视频
02:53Ribosomal RNA Synthesis
13.2K
Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
13.2K
02:22Regulated mRNA Transport
6.3K
In eukaryotes, transcription and translation are compartmentalized; an mRNA is first synthesized in the nucleus and then selectively transported to the cytoplasm for protein synthesis. Before transport, a pre-mRNA undergoes several steps of post-transcriptional modifications including splicing, 5' capping, and the addition of a poly-adenine tail. Various proteins bind to the pre-mRNA during these modifications. The mRNA transport takes place with the help of multiple proteins playing...
6.3K
02:25Centrosome Duplication
4.0K
The primary microtubule organizing center (MTOC) in animal cells is the centrosome. A centrosome has two cylindrical centrioles at its core. Each centriole consists of nine sets of three microtubules held together by proteins. The centrioles are positioned at right angles to each other and surrounded by a shapeless protein cloud called the pericentriolar matrix, or pericentriolar material (PCM).
To ensure that each daughter cell receives a centrosome after cell division, centrosome duplication...
To ensure that each daughter cell receives a centrosome after cell division, centrosome duplication...
4.0K
02:50Spindle Assembly
3.7K
Spindle assembly occurs through three, often coexisting, pathways – the centrosome-mediated pathway, the chromatin-mediated pathway, and the microtubule-mediated pathway – collectively contributing to form a robust spindle apparatus.
In most cells, centrosomes are the primary microtubule nucleation centers. In the centrosome-mediated pathway, the G2-prophase transition triggers centrosome maturation and increased microtubule nucleation. Progressive nucleation results in a...
In most cells, centrosomes are the primary microtubule nucleation centers. In the centrosome-mediated pathway, the G2-prophase transition triggers centrosome maturation and increased microtubule nucleation. Progressive nucleation results in a...
3.7K
01:13Centrioles and Centrosomes
2.7K
Most animal cells comprise a pair of centrioles together called a centrosome. The cell duplicates its centrosome and contains two centrosomes side-by-side, which begin to move apart during the prophase. As the centrosomes migrate to two different sides of the cell, microtubules start extending from each centrosome toward the other end. The mitotic spindle is composed of the centrosomes and their emerging microtubules.
Near the end of the prophase, also called late prophase or...
Near the end of the prophase, also called late prophase or...
2.7K
01:32Cytoskeletal Coordination in Cell Migration
4.8K
A migrating cell changes its shape during the cyclic events of attachment and detachment from the substratum and repositions the cell organelles correspondingly. These complex events are orchestrated by the dynamic cytoskeletal network comprising actin filaments, intermediate filaments, and microtubules. Cytoskeletal crosstalk — the direct and indirect communication between the different components — is crucial for this coordination. Direct communication involves various linker...
4.8K