Clr4/Suv39和RNA质量控制因素合作触发RNAi并抑制反意义RNA
Ke Zhang1, Tamas Fischer, Rebecca L Porter
1Laboratory of Biochemistry and Molecular Biology, National Cancer Institute/NIH, Bethesda, MD 20892, USA.
概括
这项研究揭示了关键蛋白Clr4如何与Mlo3相互作用,通过RNA干扰 (RNAi) 来处理非编码RNA. 这将RNAi与RNA质量控制联系起来,有助于潜在有害RNA的降解.
科学领域:
- * 分子生物学 * 分子生物学
- * 遗传学 遗传学是一门学科
- *RNA生物学 *RNA生物学
背景情况:
- *真核生物基因组通过普遍转录产生众多的非编码RNA.
- * 裂变酵母利用异染色质因子Clr4 (a Suv39甲基转移酶) 进行RNA干扰 (RNAi) 介导的处理,将中心转录物转化为小干扰RNA (siRNAs).
- *Clr4还调解了在euchromatic loci处反感性RNA的降解,但该机制仍然不清楚.
研究的目的:
- *阐明Clr4调解反意义RNA降解的机制.
- * 调查Clr4,RNAi机械和RNA处理因子之间的相互作用.
- * 了解Mlo3在siRNA生产和反意义RNA抑制中的作用.
主要方法:
- *使用酵母遗传学和分子生物学技术研究蛋白质-蛋白质相互作用.
- *分析了Clr4和RITS (RNA诱导的转录沉默) 对Mlo3定位和功能的影响.
- * 检查了Mlo3在中心性siRNA生产和反意义RNA抑制中的作用.
主要成果:
- *Clr4和RITS与Mlo3相互作用,这是一种参与mRNA质量控制和出口的蛋白质.
- *Clr4的损失破坏了RITS-Mlo3的相互作用,损害了中间体siRNA的产生和反意义RNA的抑制.
- *Mlo3与TRAMP复合体相互作用,这对于抑制Clr4/RNAi向的反感性RNAs至关重要.
结论:
- *Clr4与RNA质量控制机制有关.
- * 提出了一种涉及RNAi和RNA处理因子 (Mlo3,TRAMP) 的新途径,用于降解潜在有害的RNA.
- *这种协调行动确保了非编码RNA和基因组稳定的适当调节.
相关概念视频
RNA Interference
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
RNA Interference
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
siRNA - Small Interfering RNAs
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
Experimental RNAi
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
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.
RNA Performs Diverse...
RNA Performs Diverse...
Types of RNA
Overview
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...
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...


