诱导的ncRNAs在cis中全质地修改RNA结合蛋白,以抑制转录
Xiangting Wang1, Shigeki Arai, Xiaoyuan Song
1Howard Hughes Medical Institute.
Nature
|May 30, 2008
概括
转位在脂肪瘤中 (TLS) 蛋白质作为DNA损伤传感器. 它与非编码RNAs (ncRNAs) 结合,以抑制基因转录,特别是cyclin D1,以响应DNA损伤信号.
科学领域:
- 分子生物学分子生物学
- 基因规则 基因规则
- 在RNA生物学,RNA生物学.
背景情况:
- 非编码RNAs (ncRNAs) 越来越多地被认为是它们在基因调节中的作用.
- 了解ncRNAs影响转录的机制是一个关键的研究领域.
研究的目的:
- 研究RNA结合蛋白TLS在感知DNA损伤信号中的作用.
- 阐明ncRNAs和TLS调节基因转录的机制.
主要方法:
- 研究了TLS,ncRNAs和像CBP和p300这样的基因组乙烯转移酶 (HAT) 之间的相互作用.
- 分析了TLS对循环素D1 (CCND1) 促销者的招募.
- 研究了人类细胞系中对DNA损伤信号的反应中的ncRNA诱导.
主要成果:
- TLS作为DNA损伤的转录调节传感器.
- TLS与ncRNA转录结合,这将其特定的结合指向CCND1促进体.
- 这种相互作用抑制CBP和p300的HAT活动,导致CCND1基因抑制.
结论:
- 信号诱导的ncRNAs可以招募和调节像TLS这样的RNA结合协调器.
- 这种ncRNA/RNA结合蛋白机制集成了对特定信号的响应转录程序.
- 这项研究揭示了一个出乎意料的基于ncRNA的转录调节战略.
相关概念视频
Types of RNA
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Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
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Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
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...
Cis-regulatory Sequences
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
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Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
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Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
Eukaryotic transcription inhibitors usually contain two distinct domains, a DNA...
Eukaryotic transcription inhibitors usually contain two distinct domains, a DNA...
Types of RNA
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in regulating gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
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