関連する実験動画
Updated: May 12, 2026
09:11
Assays for Validating Histone Acetyltransferase Inhibitors
Published on: August 6, 2020
まとめ
ナトリウムブチラートおよび他の脂肪酸は,ヒストン脱酸化酵素を阻害することによってヒストンの過酸化酵素化を誘導する. この改変は,主に新合成ヒストンH4に影響し,その脱エチル化を防ぐ.
科学分野:
- 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
- 細胞生物学 細胞生物学
背景:
- ヒストンアセチル化は,遺伝子発現を調節する重要なエピジェネティックメカニズムです.
- ヒストン脱エチラゼ (HDAC) はアセチル群を除去し,アセチル化に逆らいます.
- ナトリウムブチラートは,HDACの活性を抑制することが知られている.
研究 の 目的:
- 培養細胞におけるヒストン過酸化に対するブチラ酸ナトリウムの効果を調査する.
- このプロセスにおけるヒストン脱エチラゼ抑制の役割を決定する.
- 異なるヒストン分子の改変パターンを調べる.
主な方法:
- 培養細胞をブチラ酸ナトリウムおよびその他の短鎖脂肪酸で処理する.
- ヒストンアセチル化レベルの分析.
- ヒストン脱酸化酵素の活性度の評価.
主要な成果:
- ナトリウムブチラート治療は,ヒストンの有意な過酸化を引き起こします.
- このハイパーアセチル化はヒストン脱酸化酵素の抑制の直接的な結果である.
- ヒストンH4,特に新たに合成されたH4は,広範なアセチル化 (24時間後に80%まで) を示しています.
- 染色体上の既存のH4は迅速にアセチル化することができるが,新たに合成されたH4は高度にアセチル化されているままである.
結論:
- ナトリウムブチラートは,HDACの抑制を介してヒストンのハイパーアセチル化を効果的に誘導します.
- この研究は,ヒストンアセチル化のダイナミックな性質,特に新たに組み込まれたヒストンの性質を強調しています.
- 短い鎖の脂肪酸は,ヒストンの改変パターンに類似した効果を共有しています.
さらに関連する動画
08:12Global Level Quantification of Histone Post-Translational Modifications in a 3D Cell Culture Model of Hepatic Tissue
Published on: May 5, 2022
07:21Automated Sample Preparation for the Multiplexed Analysis of Single-Cell Histone Post-Translational Modifications (sc-hPTM2)
Published on: December 19, 2025
関連する概念動画
02:10The Nucleosome Core Particle
Nucleosomes are the DNA-histone complex, where the DNA strand is wound around the histone core. The histone core is an octamer containing two copies of H2A, H2B, H3, and H4 histone proteins.
The paradox
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their main responsibility is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. While on the other hand, they must allow polymerase enzymes to access DNA...
The paradox
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their main responsibility is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. While on the other hand, they must allow polymerase enzymes to access DNA...
02:32Histone Modification
The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone deacetylase,...
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone deacetylase,...
02:25Spreading of Chromatin Modifications
The histone proteins in the nucleosomes are post-translationally modified (PTM) to increase or decrease access to DNA. The commonly observed PTMs are methylation, acetylation, phosphorylation, and ubiquitination of lysine amino acids in the histone H3 tail region. These histone modifications have specific meaning for the cell. Hence, they are called "histone code". The protein complex involved in histone modification is termed as "reader-writer" complex.
Writers
The writer is an enzyme that can...
Writers
The writer is an enzyme that can...
02:30Histone Variants at the Centromere
Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3 variants are also...
02:32Histone Modification
The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone deacetylase,...
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone deacetylase,...
01:12The Nucleosome Core Particle
Nucleosomes are the DNA-histone complex, where the DNA strand is wound around the histone core. The histone core is an octamer containing two copies of H2A, H2B, H3, and H4 histone proteins.
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their primary aim is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. On the other hand, they must allow polymerase enzymes to access histone-bound DNA during...
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their primary aim is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. On the other hand, they must allow polymerase enzymes to access histone-bound DNA during...