関連する実験動画
Updated: Jul 15, 2026

06:00
Nuclei Isolation from Adult Mouse Kidney for Single-Nucleus RNA-Sequencing
Published on: September 20, 2021
Net1は,rDNAサイレンシングと核の完全性のために必要なSir2関連核タンパク質である
A F Straight1, W Shou, G J Dowd
1Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115-5730, USA.
Cell
|April 29, 1999
まとめ
Net1およびSir2タンパク質を含む核静止とテロフェーズ出口 (RENT) 複合体のレギュレータは,酵母における遺伝子静止と核の完全性にとって極めて重要です. この複合体は,rDNAの繰り返しに特異的に結合し,細胞サイクル中のクロマチンの構造に影響を与えます.
科学分野:
- 分子生物学は分子生物学である.
- 細胞生物学 細胞生物学
- 遺伝学 遺伝学とは
背景:
- Sir2タンパク質は,芽生えた酵母におけるrDNAの繰り返しで遺伝子の静止を媒介し,再結合を抑制することが知られている.
- rDNAサイレンシングと核組織の基礎にある分子機構を理解することは,細胞周期の調節に不可欠です.
研究 の 目的:
- 遺伝子静止におけるSir2の役割とその他のタンパク質との関連を調査する.
- rDNAサイレンシングと核の完全性に関与するタンパク質複合体の成分を特定する.
- この複合体内のNet1の機能とrDNAとの相互作用を解明する.
主な方法:
- クロマチン免疫降水 (ChIP) は,rDNAの繰り返しへのタンパク質結合を評価する.
- タンパク質複合体を識別するための共免疫プレシピテーション
- 光顕微鏡は,細胞サイクル中の核内のタンパク質の局所化を視覚化します.
主要な成果:
- Sir2は,RENT (Regular of Nucleolar Silencing and Telophase Exit) と呼ばれる核複合体の一部として機能しています.
- 核のRENTサブユニットであるNet1は,rDNAの繰り返しと複合体を優先的に結合し,rDNAサイレンシングと核の完全性を確保します.
- Net1とSir2はインターフェーズ中に核内にコロカライズされ,Sir2はミトーシス中にダイナミックな再分布を示し,rDNAクロマチンの構造の細胞サイクル依存の変化を示しています.
結論:
- Net1とSir2を構成するRENT複合体は,酵母におけるrDNAサイレンシングと核の完全性を維持する上で重要な役割を果たします.
- Net1は,RENT複合体のrDNAへの結合因子として作用し,その静音機能に不可欠です.
- 研究結果は,この複合体の遺伝子静止と細胞周期調節 (ミトーシスからの脱出) の双重な役割を明らかにしています.
関連する概念動画
Nucleic acids
Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
The Nucleus
The nucleus is a membrane-bound organelle that acts as a control center in a eukaryotic cell. It contains chromosomal DNA, which controls gene expression and precisely regulates the production of proteins within the cell. In contrast, the DNA inside the mitochondria and chloroplast only carries out functions that are specific to those organelles.
Arrangement of DNA within Nucleus
The regulation of gene expression inside the nucleus is dependent on many factors, including the DNA structure. The...
Arrangement of DNA within Nucleus
The regulation of gene expression inside the nucleus is dependent on many factors, including the DNA structure. The...
Additional Subnuclear Structures
The eukaryotic nucleus is a double membrane-bound organelle that contains nearly all of the cell’s genetic material in the form of chromosomes. It is rightly called the “brain” of the cell as it shoulders the responsibility of responding to various physiological processes, stress, altered metabolic conditions, and other cellular signals.
The nucleus contains many membrane-less subnuclear organelles or nuclear bodies, such as nucleoli, Cajal bodies, speckles, paraspeckles, etc. These nuclear...
The nucleus contains many membrane-less subnuclear organelles or nuclear bodies, such as nucleoli, Cajal bodies, speckles, paraspeckles, etc. These nuclear...
Nuclear Protein Sorting
Nuclear protein sorting is the selective trafficking of histones, polymerases, gene regulatory proteins into the nucleus and exporting RNAs and ribosomes to the cytosol. It is a tightly controlled process that regulates gene expression within a cell.
Proteins targeted to the nucleus carry nuclear localization signals or NLS recognized by import receptors in the cytosol. Similarly, proteins with nuclear export signals are recognized by export receptors. Import and export receptors are...
Proteins targeted to the nucleus carry nuclear localization signals or NLS recognized by import receptors in the cytosol. Similarly, proteins with nuclear export signals are recognized by export receptors. Import and export receptors are...
The Nucleus
The nucleus is a membrane-bound organelle that acts as a control center in a eukaryotic cell. It contains chromosomal DNA, which controls gene expression and precisely regulates the production of proteins within the cell. In contrast, the DNA inside the mitochondria and chloroplast only carries out functions that are specific to those organelles.
Arrangement of DNA within Nucleus
The regulation of gene expression inside the nucleus is dependent on many factors, including the DNA structure. The...
Arrangement of DNA within Nucleus
The regulation of gene expression inside the nucleus is dependent on many factors, including the DNA structure. The...
Nucleoid
The nucleoid represents a structurally and functionally distinct region within prokaryotic cells, where the cell's DNA and associated proteins are housed. Unlike eukaryotic cells, prokaryotes lack a membrane-bound nucleus, and the nucleoid facilitates the organization and accessibility of the genetic material within this constraint. The DNA in most bacteria and archaea exists as a single, circular, double-stranded molecule that is highly compacted through supercoiling and interactions with...

