関連する実験動画
Updated: Jul 16, 2026

09:59
AAV Deployment of Enhancer-Based Expression Constructs In Vivo in Mouse Brain
Published on: March 31, 2022
SV40強化器における機能的な組織の協同性と階層的レベル
C Fromental1, M Kanno, H Nomiyama
1Laboratoire de Génétique Moléculaire des Eucaryotes du CNRS, Faculté de Médecine, Strasbourg, France.
Cell
|September 23, 1988
まとめ
様々な細胞系における増強剤のモチーフを調査した結果,3種類のDNA配列要素が明らかになった. これらのモチーフは,細胞特異的な因子と相互作用し,異なる組織パターンを介して遺伝子転写に影響を与えます.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- 細胞生物学 細胞生物学
背景:
- 増強剤は,遺伝子発現を制御する重要な規制DNA要素である.
- 細胞特異の増強剤の活性を理解することは,遺伝子調節を解読する鍵です.
- SV40増強剤には,転写因子に対する複数の既知の結合部位が含まれています.
研究 の 目的:
- 特定のSV40増強剤モチーフ (GT-IIC,GT-I,Sph-II,Sph-I,オクターマー) の細胞特異的活性を調べる.
- これらのモチーフがHeLa,MPC11,F9細胞を含む異なる細胞タイプでどのように機能するかを特徴づける.
- 機能的組織と細胞因子との相互作用に基づいてモチーフのクラスを定義する.
主な方法:
- さまざまな細胞系における特定のDNAモチーフの増強活性をテストする.
- モチーフのオリゴメリゼーションと他のモチーフとの関連性の影響を分析する.
- 不分化および分化F9胚性がん細胞におけるモチーフ活性比較.
主要な成果:
- 強化活性に基づく3つのモチーフのクラス (A,B,C) を特定しました.
- クラスAモチーフは,タンデムリピートオリゴメリゼーションで活性化します.
- クラスBのモチーフは,オリゴメリゼーション後の活動のために第2のモチーフと関連付けることを必要とし,クラスCのモチーフは,単一コピーのオリゴメリゼーションで活動を示します.
結論:
- 強化器モチーフは,その機能的特性および組織的要件によって分類できることを実証しました.
- 細胞特異の強化因子が転写を調節する明確なメカニズムを明らかにした.
- 異なる細胞環境における強化剤の複雑で多層の機能的組織を強調した.
関連する概念動画
RNA Polymerase II Accessory Proteins
Proteins that regulate transcription can do so either via direct contact with RNA Polymerase or through indirect interactions facilitated by adaptors, mediators, histone-modifying proteins, and nucleosome remodelers. Direct interactions to activate transcription is seen in bacteria as well as in some eukaryotic genes. In these cases, upstream activation sequences are adjacent to the promoters, and the activator proteins interact directly with the transcriptional machinery. For example, in...
Cooperative Binding of Transcription Regulators
Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome. Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form dimers that...
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...
RNA Polymerase II Accessory Proteins
Proteins that regulate transcription can do so either via direct contact with RNA Polymerase or through indirect interactions facilitated by adaptors, mediators, histone-modifying proteins, and nucleosome remodelers. Direct interactions to activate transcription is seen in bacteria as well as in some eukaryotic genes. In these cases, upstream activation sequences are adjacent to the promoters, and the activator proteins interact directly with the transcriptional machinery. For example, in...
Cooperative Binding of Transcription Regulators
Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome. Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form dimers that...
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...

