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Updated: Jun 17, 2026

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In-Nucleus Hi-C in Drosophila Cells
Published on: September 15, 2021
主要な核タンパク質は,核と細胞プラズマの間をシャトルで移動する
R A Borer1, C F Lehner, H M Eppenberger
1Institut für Zellbiologie, ETH Hönggerberg, Zürich, Switzerland.
Cell
|February 10, 1989
まとめ
ヌクレオリンとB23/No38タンパク質は,原核と細胞質の間に移動し,以前の仮定に異議を唱える. この核細胞プラズマ輸送は,核活動とリボソームの構成要素の移動を調節する役割を果たすことを示唆しています.
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
- バイオケミストリー バイオケミストリー
背景:
- ヌクレオリン (92 kDa) はRNAポリメラーゼIの転写とプレリボソームのRNA結合を調節する.
- B23/No38 (38 kDa) は,プレリボソーム粒子の内核包装に関与しています.
- 両方のタンパク質は,以前は,核のみであると考えられていた.
研究 の 目的:
- ヌクレオリンとB23/No38タンパク質の局所化と移動を調査する.
- これらの核タンパク質が核と細胞質の間をシャトルするかどうかを判断する.
- これらのタンパク質に対する核サイトプラズマのシャトルの機能的影響を調査する.
主な方法:
- 核間のタンパク質の均衡を監視するための種間ヘテロカリオン分析.
- 抗体のサイトプラズマ微注射を行い,その後,抗原媒介核蓄積の観察を行う.
- タンパク質の局所化と移動の免疫学的検出.
主要な成果:
- ニュクレオリンとB23/No38の両方の核とサイトプラズマの間の絶え間ないシャットリングの証拠.
- 細胞プラズマ的に導入された抗体の抗原媒介核輸入の実証.
- サイトプラズマにおけるこれらの主要な核タンパク質の予期せぬ検出.
結論:
- ヌクレオリンとB23/No38タンパク質は,核と細胞質の間を活発にシャトルします.
- これらのシャトルタンパク質は,核サイトプラズマでリボソーム成分を輸送する役割を果たしている可能性が高い.
- シャットリングタンパク質の細胞プラズマ的曝露は,細胞プラズマの核機能の調節を可能にします.
関連する概念動画
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...
Nuclear Export of mRNA
Before mRNAs are exported to the cytoplasm, it is crucial to check each mRNA for structural and functional integrity. Eukaryotic cells use several different mechanisms, collectively known as mRNA surveillance, to look for irregularities in mRNAs. Irregular or aberrant mRNA are rapidly degraded by various enzymes. If a defective mRNA escapes the surveillance, it would be translated into a protein which would either be non-functional or not function properly. One of the primary irregularities in...
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...
Nuclear Export of mRNA
Before mRNAs are exported to the cytoplasm, it is crucial to check each mRNA for structural and functional integrity. Eukaryotic cells use several different mechanisms, collectively known as mRNA surveillance, to look for irregularities in mRNAs. Irregular or aberrant mRNA are rapidly degraded by various enzymes. If a defective mRNA escapes the surveillance, it would be translated into a protein which would either be non-functional or not function properly. One of the primary irregularities in...
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...

