関連する実験動画
Updated: Jun 6, 2026

11:09
Chromatin Isolation by RNA Purification (ChIRP)
Published on: March 25, 2012
ヴァルナライゼーション媒介による長時間の内部非コーディングRNAによるエピジェネティックサイレンシング
1Section of Molecular Cell and Developmental Biology and Institute for Cellular and Molecular Biology, the University of Texas at Austin, TX 78712, USA.
まとめ
ヴァルナライゼーションは,FLC遺伝子 (FLOWERING LOCUS C) をエピジェネティックに沈黙させるために寒さを使用します. 新しく開発されたロング・イントロニック・ノンコーディングRNA"COLDAIR"は,PRC2をFLCにターゲティングすることで,この冷凍誘発の表遺伝子抑制に不可欠である.
科学分野:
- 植物生物学 植物生物学
- エピジェネティクス エピジェネティクス
- 分子生物学は分子生物学である.
背景:
- ヴェルナライゼーションは,冬の寒さにさらされた後の春に植物の開花を可能にする重要なプロセスです.
- これは,花の抑制剤,特にアラビドプシスのFLOWERING LOCUS C (FLC) の表遺伝的静止を伴う.
- ポリコンブ・レプレッシブ・コンプレックス2 (PRC2) は,この寒さによるエピジェネティック・サイレンシングを媒介する.
研究 の 目的:
- ヴァルナライゼーション媒介によるFLCのエピジェネティックサイレンシングにおけるノンコーディングRNAの役割を調査する.
- 寒さに曝露する間,PRC2をFLCロカスに標的にする新たな要因を特定する.
主な方法:
- 寒冷処理を受けたアラビドプシスの植物における遺伝子発現とクロマチンの改変の分析.
- RNA免疫プレシピテーション (RIP) とクロマチンの免疫プレシピテーション (ChIP) は,RNA-タンパク質とタンパク質-DNAの相互作用を検出するためのアッセイである.
- 特定のノンコーディングRNAが欠けている変異体を用いた遺伝分析.
主要な成果:
- COLDAIR (COLD ASSISTED INTRONIC NONCODING RNA) と名付けられた長いイントロニックノンコーディングRNAは,言語化にとって重要なものとして特定されています.
- COLDAIRは,PRC2.2のサブユニットと物理的に相互作用する.
- COLDAIRは,PRC2をFLCロカスに標的化するために必要であり,安定した表遺伝子抑制につながります.
結論:
- COLDAIRは,PRC2のFLC遺伝子へのガイドとして作用し,言語化経路の重要な構成要素です.
- この相互作用は,FLCで安定した抑制性クロマチンを確立し,冬の寒さに応じて適切な開花時間を確保します.
- COLDAIRは,植物における環境誘発の表遺伝子調節のための新しいメカニズムを表しています.
関連する概念動画
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...
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...
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...
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 (lncRNA)...
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 (lncRNA)...

