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Updated: Jun 3, 2026

11:09
Chromatin Isolation by RNA Purification (ChIRP)
Published on: March 25, 2012
長いノンコーディングRNAは,ホメオティック遺伝子発現を調整するためにアクティブなクロマチンを維持します
Kevin C Wang1, Yul W Yang, Bo Liu
1Howard Hughes Medical Institute, Program in Epithelial Biology, Stanford University School of Medicine, Stanford, California 94305, USA.
Nature
|March 23, 2011
まとめ
長いインター遺伝子非コーディングRNA (lincRNAs) は,遺伝子発現を活性化することができます. HOTTIPは,新しいlincRNAであり,染色体変異複合体を募集することによってHOXA遺伝子活性化を調整し,遠距離遺伝子調節におけるlincRNAの役割を実証しています.
科学分野:
- ゲノミクスゲノミクスとは
- 分子生物学は分子生物学である.
- エピジェネティクス エピジェネティクス
背景:
- ロングインタージェニック・ノンコーディングRNAs (lincRNAs) は,遺伝子調節,主に遺伝子サイレンシングにおける役割としてますます認識されています.
- 遺伝子の活性化,特に発達過程における lincRNAs の機能は,まだあまり理解されていません.
- 局所制御として知られる隣接する遺伝子の調整調節は,発達とホメオスタシスにとって極めて重要です.
研究 の 目的:
- 遺伝子活性化におけるlincRNAsの役割を調査し,特にロカス制御におけるそれらの潜在的な関与に焦点を当てた.
- ホックス遺伝子のクラスタの調節に関与する新しいlincRNAを特定し,特徴づけること.
- lincRNAsが長距離遺伝子の活性化を媒介するメカニズムを解明する.
主な方法:
- HOTTIPの識別と特徴付け,HOXAロカスから転写されたリンクRNAである.
- HOTTIPとその標的遺伝子の近接性を評価するために染色体ループの相互作用の分析.
- HOTTIP RNAとWDR5およびMLL複合体の相互作用を決定する生化学的分析.
- ヒストンH3ライシン4トリメチル化とHOTTIP発現に対する遺伝子転写の評価.
主要な成果:
- HOTTIPは,HOXA場所の5'尖端からのリンクRNAが特定されました.
- HOTTIPは5'HOXA遺伝子の活性化を vivoで調整する.
- 染色体ループは,HOTTIPの標的遺伝子との相互作用を容易にする.
- HOTTIP RNAはWDR5に直接結合し,WDR5/MLL複合体を採用してヒストンの改変と遺伝子転写を誘導する.
結論:
- lincRNAsは,長距離遺伝子の活性化を調整する重要な中間体として機能することができます.
- HOTTIPは,染色体改変によるlincRNA媒介遺伝子活性化のための新しいメカニズムを示しています.
- この研究は,開発中の調整された遺伝子発現のためのクロマチンのドメインの組織化におけるlincRNAsの可能性を強調しています.
関連する概念動画
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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)...
Heterochromatin
The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions that take up more dye are called heterochromatin. Heterochromatin is further classified into two forms – constitutive heterochromatin and facultative heterochromatin.
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at 9th...
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at 9th...
Heterochromatin
The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions that take up more dye are called heterochromatin. Heterochromatin is further classified into two forms – constitutive heterochromatin and facultative heterochromatin.
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at 9th...
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at 9th...
Chromatin Position Affects Gene Expression
Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area.
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the timing and level of...
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the timing and level of...

