相关实验视频

Updated: Jul 6, 2025

Highly Efficient Ligation of Small RNA Molecules for MicroRNA Quantitation by High-Throughput Sequencing

Highly Efficient Ligation of Small RNA Molecules for MicroRNA Quantitation by High-Throughput Sequencing

Published on: November 18, 2014

一个SUMO E3酶促进长非编码RNA转录,以调节小RNA指导的DNA消除

Salman Shehzada¹, Tomoko Noto¹, Julie Saksouk¹

¹Institute of Human Genetics (IGH), CNRS, University of Montpellier, Montpellier, France.

|January 10, 2024

概括

SUMO E3联酶Ema2对于长非编码RNA (lncRNA) 转录在Tetrahymena中至关重要. 这一过程对于目标导向的小RNA降解和DNA消除至关重要,使性繁殖成为可能.

科学领域:

表观遗传学在表观遗传学中,表观遗传学是指表观遗传学.
RNA生物学的RNA生物学
分子遗传学分子遗传学

背景情况:

小RNAs通过与新生长非编码RNAs (lncRNAs) 相互作用来引导基因沉默.
在Tetrahymena中,与Piwi相关的小RNAs (scnRNAs) 与体性 lncRNAs相互作用,可能导致针对性小RNA降解 (TDSD).
建议不降解的scnRNAs可以消除生殖系有限的DNA序列.

研究的目的:

调查SUMO E3结合酶Ema2在Tetrahymena的基因沉默和DNA消除途径中的作用.
阐明Ema2影响lncRNA转录及其与小RNAs相互作用的分子机制.

主要方法:

研究了Ema2对lncRNA积累,TDSD和DNA消除的要求.
研究了Ema2,Ubc9 (SUMO E2结合酶) 和Spt6 (转录调节器) 之间的相互作用.
评估了Ema2对Spt6和RNA聚合酶II与染色质的关联的影响.

主要成果:

Ema2对于体内 lncRNAs,TDSD的积累和完善可活性的性后代的DNA消除至关重要.
Ema2 与 Ubc9 相互作用,并增强了 Spt6.6. 的 SUMOylation.
Ema2促进了Spt6和RNA聚合酶II的染色体结合.

结论:

导向 Ema2 的 SUMOylation 对于在 Tetrahymena 中的 lncRNA 转录至关重要.
由 Ema2 推动的 lncRNA 转录是小RNA 与基因组之间的通信的先决条件.
这一途径对于被编程的DNA消除和性繁殖至关重要.

关键词:

这就是所谓的SUMO.泰特拉希米纳是什么意思染色体是一种染色体.表观遗传学是指表观遗传学.基因表达的基因表达方式长非编码RNA是什么意思编程的 DNA 消除.小小的RNARNA小小的RNARNA.

更多相关视频

Cell Based Assays of SINEUP Non-coding RNAs That Can Specifically Enhance mRNA Translation

Cell Based Assays of SINEUP Non-coding RNAs That Can Specifically Enhance mRNA Translation

Published on: February 1, 2019

Detection of RNA-binding Proteins by In Vitro RNA Pull-down in Adipocyte Culture

Detection of RNA-binding Proteins by In Vitro RNA Pull-down in Adipocyte Culture

Published on: July 22, 2016

相关概念视频

lncRNA - Long Non-coding RNAs

lncRNA - Long Non-coding RNAs

In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA...

Types of RNA

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...

siRNA - Small Interfering RNAs

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...

Chromatin Structure Regulates pre-mRNA Processing

Chromatin Structure Regulates pre-mRNA Processing

In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...

Riboswitches

Riboswitches

Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...

RNA Stability

RNA Stability

Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...