ユカリオットのゲノムのDNAでコードされた核細胞組織
Noam Kaplan1, Irene K Moore, Yvonne Fondufe-Mittendorf
1Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot 76100, Israel.
Nature
|December 19, 2008
まとめ
核粒子のDNA配列の好みは,生物体内の全ゲノム組織に大きな影響を与えます. この内在的な好みは,核細胞が結合する場所の決定に中心的な役割を果たし,遺伝子調節に影響を与えます.
科学分野:
- 分子生物学は分子生物学である.
- 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
背景:
- 核細胞組織は遺伝子調節に不可欠です.
- クロマチンの改造剤,DNA結合タンパク質,DNA配列などの複数の要因が,核細胞の位置づけを vivo で影響する.
- 各要因の影響を in vivo で区別することは,組み合わせた効果のために困難です.
研究 の 目的:
- 実験的に,内在的な核細胞体DNA配列の優先順位の重要性を in vivo で決定する.
- 核細胞配列の好みの計算モデルを作成する.
主な方法:
- 精製された酵母ゲノムDNAの全ゲノム核細胞占有率を in vitro で測定する.
- マイクロコックスのヌクレアゼ独立法を使用して,DNAオリゴヌクレオチドに対するヌクレオソーム親和性を評価する.
- in vitroデータに基づく計算モデルを開発する.
主要な成果:
- In vitroの核細胞占有率マップは,in vivoのマップとよく似ています.
- 転写因子結合部位と遺伝子調節部位で観察された核細胞の枯渇 in vitro.
- 計算モデルでは,C. elegans.における核細胞のインビヴォ占有率と有意な相関が示されています.
結論:
- 内在的なDNA配列の好みは,核細胞組織を決定する主要な決定因子である.
- ゲノム配列自体は,特定の規制部位での核細胞の枯渇に寄与する.
- 配列の好みを理解することは,in vivo核細胞体の位置を予測するのに役立ちます.
関連する概念動画
Genomic DNA in Eukaryotes
Eukaryotes have large genomes compared to prokaryotes. To fit their genomes into a cell, eukaryotic DNA is packaged extraordinarily tightly inside the nucleus. To achieve this, DNA is tightly wound around proteins called histones, which are packaged into nucleosomes that are joined by linker DNA and coil into chromatin fibers. Additional fibrous proteins further compact the chromatin, which is recognizable as chromosomes during certain phases of cell division.
DNA Packaging
Overview
DNA Packaging
Overview
The Nucleosome
DNA in a human cell is almost 2m long and it is packed inside a tiny nucleus that is only a few microns in diameter. The level of compaction of DNA inside the nucleus is astonishing. It is organized into several sequentially higher levels of compaction to fit into such a tiny space. The most compact form of DNA is a chromosome that can be seen under a microscope in a dividing cell.
DNA is wound twice around a protein complex called histone core, that consist of 8 histone proteins. This complex...
DNA is wound twice around a protein complex called histone core, that consist of 8 histone proteins. This complex...
The Nucleosome
DNA in a human cell is almost 2m long and it is packed inside a tiny nucleus that is only a few microns in diameter. The level of compaction of DNA inside the nucleus is astonishing. It is organized into several sequentially higher levels of compaction to fit into such a tiny space. The most compact form of DNA is a chromosome that can be seen under a microscope in a dividing cell.
DNA is wound twice around a protein complex called histone core, that consist of 8 histone proteins. This complex...
DNA is wound twice around a protein complex called histone core, that consist of 8 histone proteins. This complex...
The Nucleosome
Human DNA is almost two meters long. However, it is compressed inside a tiny nucleus measuring only a few microns in diameter. To make this degree of compaction possible, DNA is organized into several sequential levels so that it can fit into such a tiny space. The most compact form of DNA is a chromosome that can be seen under a microscope in a dividing cell.
In a chromosome, DNA is wound twice around a protein complex called a histone octamer core, which consists of 8 histone proteins. This...
In a chromosome, DNA is wound twice around a protein complex called a histone octamer core, which consists of 8 histone proteins. This...


