相关实验视频

Updated: Jul 26, 2025

Studying RNA Interactors of Protein Kinase RNA-Activated during the Mammalian Cell Cycle

Studying RNA Interactors of Protein Kinase RNA-Activated during the Mammalian Cell Cycle

Published on: March 5, 2019

RNA聚合酶I亚单元RPA43激活rRNA表达和细胞增殖,但抑制细胞迁移

Yue Zhang¹, Yaoyu Pang², Kewei Zhang¹

¹School of Life Science and Health, Wuhan University of Science and Technology, Wuhan, Hubei province 430065, China.

Biochimica et biophysica acta. General subjects

|June 21, 2023

概括

RPA43促进RNA聚合酶I转录和细胞增殖,但抑制细胞迁移. 这种蛋白质为抗癌药物开发提供了潜在的目标,影响瘤生长和转移.

科学领域:

分子生物学分子生物学
细胞生物学细胞生物学
癌症研究癌症研究

背景情况:

RNA聚合酶I (Pol I) 合成了细胞功能,如核糖体生物发生和生长的必要产品.
聚胺产品的失调与包括癌症和核糖体病变在内的疾病有关.
对于Pol I转录和子单元功能的精确机制的理解尚不完全.

研究的目的:

阐明RPA43在Pol I转录中的作用及其对细胞增殖和迁移的影响.
为了研究RPA43的功能背后的分子机制.
确定RPA43作为癌症治疗的潜在治疗标.

主要方法:

分析RPA43表达水平和与Pol I产物积累和细胞增殖的相关性.
在RPA43耗尽后对HeLa细胞迁移的评估.
调查RPA43对招募Pol I转录机械因素的影响.
检查RPA43对c-JUN和Integrin基因表达的影响.

主要成果:

RPA43的表达与Pol I产品水平和细胞增殖有正相关.
由于RPA43的耗尽,增强了HeLa细胞的迁移,这表明它在这个过程中发挥了负面的调节作用.
RPA43激活编码Pol I转录机制因子的基因的转录,促进它们对rDNA促进者的招募.
RPA43通过减少c-JUN和Integrin的表达来抑制细胞迁移.

结论:

RPA43在细胞增殖 (促进) 和迁移 (抑制) 中表现出相反的作用,同时始终驱动Pol I-依赖转录.
RPA43是Pol I介导转录和细胞动态的关键调节者.
准RPA43为开发新型抗癌疗法提供了一个有前途的战略.

关键词:

细胞迁移细胞迁移细胞的增殖细胞的增殖.RNA聚合酶I指向转录的转录在RPA43中使用RPA43.核糖体RNA表达的表达方式

更多相关视频

Novel RNA-Binding Proteins Isolation by the RaPID Methodology

Novel RNA-Binding Proteins Isolation by the RaPID Methodology

Published on: September 30, 2016

Analyzing DNA-Protein Interactions with Streptavidin-Based Biolayer Interferometry

Analyzing DNA-Protein Interactions with Streptavidin-Based Biolayer Interferometry

Published on: January 17, 2025

相关概念视频

Eukaryotic RNA Polymerases

Eukaryotic RNA Polymerases

RNA Polymerase (RNAP) is conserved in all animals, with bacterial, archaeal, and eukaryotic RNAPs sharing significant sequence, structural, and functional similarities. Among the three eukaryotic RNAPs, RNA Polymerase II is most similar to bacterial RNAP in terms of both structural organization and folding topologies of the enzyme subunits. However, these similarities are not reflected in their mechanism of action.
All three eukaryotic RNAPs require specific transcription factors, of which the...

Transcription Initiation

Transcription Initiation

Initiation is the first step of transcription in eukaryotes. Prokaryotic RNA Polymerase (RNAP) can bind to the template DNA and start transcribing. On the other hand, transcription in eukaryotes requires additional proteins, called transcription factors, to first bind to the promoter region in the DNA template. This binding helps recruit the specific RNAP that can assemble on the DNA and start transcription.
The promoters and enhancers and their accessory proteins allow tight regulation of...

Bacterial RNA Polymerase

Bacterial RNA Polymerase

Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...

RNA Polymerase II Accessory Proteins

RNA Polymerase II Accessory Proteins

Proteins that regulate transcription can do so either via direct contact with RNA Polymerase or through indirect interactions facilitated by adaptors, mediators, histone-modifying proteins, and nucleosome remodelers. Direct interactions to activate transcription is seen in bacteria as well as in some eukaryotic genes. In these cases, upstream activation sequences are adjacent to the promoters, and the activator proteins interact directly with the transcriptional machinery. For example, in...

Negative Regulator Molecules

Negative Regulator Molecules

Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.

piRNA - Piwi-interacting RNAs

piRNA - Piwi-interacting RNAs

PIWI-interacting RNAs, or piRNAs, are the most abundant short non-coding RNAs. More than 20,000 genes have been found in humans that code for piRNAs while only 2000 genes have been found for miRNAs. piRNAs can act at the transcriptional and post-transcriptional levels and have a vital role in silencing transposable elements present in germ cells. They are also involved in epigenetic silencing and activation. Previously, they were thought to function only in germ cells but new evidence suggests...