CTCFとコヘシン:遺伝子規制要素と標的を結びつける
Matthias Merkenschlager1, Duncan T Odom
1Lymphocyte Development Group, MRC Clinical Sciences Centre, Imperial College London, Du Cane Road, London W12 0NN, UK. matthias.merkenschlager@csc.mrc.ac.uk
Cell
|March 19, 2013
まとめ
CTCFとコヘシンタンパク質は,DNA要素間の長距離相互作用を調整する. 転置可能な元素は,これらの相互作用を変化させ,細胞型特異的な遺伝子ネットワークを潜在的に形成することができます.
科学分野:
- ゲノミクスゲノミクスとは
- 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:
- エピジェノミクスは,規制的なDNA要素を特定し,相互作用をマップします.
- CTCFとコヘシンは,ゲノム組織に関与する重要なタンパク質です.
研究 の 目的:
- 長期的な規制要素の相互作用の調整におけるCTCFとコヘシンの役割を探求する.
- 転置可能な要素がこれらの相互作用に及ぼす影響を調査する.
- これらの相互作用がどのように細胞型特異の転写ネットワークを形成するかを理解する.
主な方法:
- 現在のエピジェノミクスアプローチのレビュー.
- CTCFとコヘシン・バインディングデータの分析.
- 適用可能な要素が規制ネットワークに与える影響の検討.
主要な成果:
- CTCFとコヘシンは,長距離の相互作用を媒介する上で重要な役割を果たします.
- 種別トランスポーザブル要素は,CTCFの結合部位を修正することができます.
- Cohesinは,強化剤,促進剤,CTCFサイトをリンクしています.
結論:
- CTCFとコヘシンは,発達的に調節された遺伝子ネットワークの形成を促進します.
- これらのネットワークは,細胞型特異的な遺伝子発現に不可欠です.
- 適用可能な要素は,規制の相互作用の可塑性に貢献する.
関連する概念動画
Cis-regulatory Sequences
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
Cis-regulatory Sequences
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
Co-activators and Co-repressors
Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
Co-activators and Co-repressors
Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
Covalently Linked Protein Regulators
Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.
These groups modify specific amino acids in a protein.
Covalently Linked Protein Regulators
Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.
These groups modify specific amino acids in a protein.


