関連する実験動画
Updated: May 6, 2026

12:05
Co-staining Blood Vessels and Nerve Fibers in Adipose Tissue
Published on: February 13, 2019
9.0K
Sir媒介抑制は,染色体および亜核の文脈とは無関係に起こり得る
Marc R Gartenberg1, Frank R Neumann, Thierry Laroche
1Department of Pharmacology, University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA. gartenbe@umdnj.edu
Cell
|December 29, 2004
まとめ
イーストのサイレントクロマチンは,核の周辺に固定されていない場合でも,転写的に抑制されているままです. この静止はテロメア結合とは無関係で,KuまたはEsc1タンパク質なしで持続します.
科学分野:
- 細胞生物学 細胞生物学
- 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:
- エピジェネティックメカニズムは,哺乳類のヘテロクロマチンに似た,芽生えた酵母におけるHM交配型ロキスを沈黙させます.
- これらの位置はテロメアと結び付けられ,テロメアは核の周辺に集まって圧縮される.
- イーストのテロメアアンカリングは,Ku因子によるサイレントクロマチンとは独立して起こる可能性があります.
研究 の 目的:
- サイレントクロマチンがテロメアとは無関係に核周辺に固定されているかどうかを調査する.
- 静音が固定装置なしで持続するかどうかを判断する.
- 静かなクロマチンの固定におけるKuとEsc1の役割を解明する.
主な方法:
- 誘導可能な部位特異再結合により,HMRロクスを切除する.
- 切断されたクロマチンのリングを追跡するためのリアルタイム光顕微鏡.
- Ku と Esc1 削除変異体を含む遺伝子解析.
主要な成果:
- 静かなクロマチンのリングは核包膜と結合し,非静かなリングは移動性がある.
- 静かなクロマチンの固定にはKuまたはEsc1が必要である.
- KuとEsc1の両方が欠けているクロマチンの環は,核プラズマの局所化にもかかわらず,転写的に静かである.
結論:
- サイレントクロマチンの転写抑制は,周核アンカリングとは無関係に持続することができます.
- 静音装置を維持するために,周核アンカージは不可欠ではありません.
- KuとEsc1は,静かなクロマチンのアンカリングの重要な要因ですが,持続的な抑圧の要因ではありません.
関連する概念動画
The Blood-brain Barrier
47.4K
Overview
47.4K
Chromatin Structure Regulates pre-mRNA Processing
6.6K
In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...
The chromatin structure, especially...
6.6K
Eukaryotic Transcription Inhibitors
9.1K
Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
9.1K
Blood Transfusion and Agglutination
13.2K
Blood transfusion is a therapeutic measure to restore the blood volume after extensive blood loss due to an accident or a medical procedure. Blood transfusion involves drawing a certain amount of blood from a suitable donor and infusing it into the recipient.
History
The history of blood transfusion dates back to the 17th century, when early attempts were made in animals. In 1818 James Blundell, a British doctor, performed the first successful human blood transfusion. Later in 1900, Karl...
History
The history of blood transfusion dates back to the 17th century, when early attempts were made in animals. In 1818 James Blundell, a British doctor, performed the first successful human blood transfusion. Later in 1900, Karl...
13.2K
Inhibition of Cdk Activity
4.8K
The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
4.8K
Factors Affecting Protein-Drug Binding: Drug Interactions
733
Drug interactions are a critical aspect of pharmacology and can occur when two or more drugs compete for the same binding site. This competition can result in one drug displacing another, altering the effect of the displaced drug. Drug interactions are complex processes that rely heavily on how much of the displacer drug is present and how strongly it can bind to the same sites as the displaced drug.
Displacement interactions can have varying outcomes, ranging from toxicity to virtually...
Displacement interactions can have varying outcomes, ranging from toxicity to virtually...
733

