相关实验视频
Updated: Jun 28, 2026

11:09
Chromatin Isolation by RNA Purification (ChIRP)
Published on: March 25, 2012
空气非编码RNA通过准G9a到染色质来表观遗传地沉默转录
Takashi Nagano1, Jennifer A Mitchell, Lionel A Sanz
1Laboratory of Chromatin and Gene Expression, Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, UK. takashi.nagano@bbsrc.ac.uk
概括
像空气这样的大型非编码RNAs (ncRNAs) 在表观遗传学上沉默基因. 空气招募G9a酶以使小鼠胎盘中的Slc22a3基因表达沉默,揭示了表观遗传基因沉默的机制.
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.
- 分子生物学分子生物学
- 基因组学就是基因组学.
背景情况:
- 已知大型非编码RNAs (ncRNAs) 在表观遗传上使基因沉默,但机制尚不清楚.
- 空气ncRNA被印记,这意味着它只从父亲的等位基因表达出来.
- 在小鼠胎盘中,空气对于邻近的基因 (包括Slc22a3) 的等位基因特异性沉默至关重要.
研究的目的:
- 为了研究Air ncRNA表观遗传沉默基因表达的机制.
- 确定Air ncRNA在Slc22a3基因转录调节中的作用.
- 为了确定涉及空气介导基因沉默的分子相互作用.
主要方法:
- 染色体免疫沉 (ChIP) 评估空气与Slc22a3促进物染色体的相互作用.
- 对Slc22a3促进体的H3K9甲基化水平的分析.
- 基因切除G9a基因以研究其在空气中介沉默中的作用.
- 使用截断的空气来评估其在促进者招募和基因沉默中的功能.
主要成果:
- 在小鼠的胎盘中,空气ncRNA与Slc22a3促进色素和H3K9甲基转移酶G9a相互作用.
- 在Slc22a3促进体的空气积累与增加的H3K9甲基化和转录抑制相关.
- G9a的遗传删除导致Slc22a3.3的双,非印记转录.
- 截断的空气未能局部化到Slc22a3促进体,损害了G9a的招募,并导致双转录.
结论:
- 空气ncRNA的目标是抑制基因组修饰酶,如G9a,到特定的染色质域.
- 这种相互作用导致局部H3K9甲基化和Slc22a3.3.等目标基因的表观遗传沉默.
- 这些发现表明,大型ncRNA如何调解表观遗传基因沉默的一般机制.
相关概念视频
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...
Inheritance of Chromatin Structures
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying DNA...
Epigenetic Regulation
Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
X-chromosome...
Epigenetic Regulation
Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
Epigenetic Regulation
Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.

