植物中的小沉默RNA是受体细胞中的移动和直接表观遗传修饰
Attila Molnar1, Charles W Melnyk, Andrew Bassett
1Department of Plant Sciences, University of Cambridge, Cambridge CB2 3EA, UK.
概括
小RNAs (sRNAs) 在植物组织之间移动,携带表观遗传指令. 这项研究确定了移动sRNA,这些sRNA在受体细胞中指导全基因组表观遗传修饰,影响植物防御.
科学领域:
- 植物分子生物学 植物分子生物学
- 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
背景情况:
- RNA沉默是植物中一个关键的调节过程.
- 已知移动信号可以在植物组织之间传输信息.
- 移动RNA的性质和功能仍然不完全理解.
研究的目的:
- 为了识别特定的小RNAs (sRNAs) 作为植物中的移动静音信号.
- 为了研究这些sRNAs在移植结合中的运动.
- 确定移动sRNA在引导受体植物细胞表观遗传修饰中的作用.
主要方法:
- 使用Arabidopsis thaliana进行移植实验,以创建源-受体组织系统.
- 利用在来源或接受组织中缺乏小RNA生物发生的突变物.
- 分析跨基因衍生和内源性sRNAs在移植结合的运动.
- 提供移动sRNA在指导表观遗传修饰中的作用的证据.
主要成果:
- 发现转基因衍生和内源性小RNAs (sRNAs) 通过移植结合从来源组织移动到受体组织.
- 有证据表明,24核酸移动sRNA负责指导受体细胞中的表观遗传修饰.
- 移动sRNA促进了植物内表观遗传特征的传播.
结论:
- 移动小RNAs (sRNAs) 在植物中作为传递表观遗传信息的关键信号.
- 移动sRNA运动的这种机制在植物基因组防御和对环境刺激的反应中起作用.
- 了解移动sRNA功能,可以深入了解持续的表观遗传和植物适应.
相关概念视频
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...
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...
Small interfering RNAs (siRNA)
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...
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...


