関連する実験動画
Updated: Feb 19, 2026

12:13
Single-Molecule Imaging of Nuclear Transport
Published on: June 9, 2010
13.8K
核孔を通過する輸送を規制することによって,YAPの核侵入を誘発する
Alberto Elosegui-Artola1, Ion Andreu2, Amy E M Beedle3
1Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), 08028 Barcelona, Spain.
Cell
|November 7, 2017
まとめ
核に及ぼす力により,核孔のメカニズムが変化することで,YAP (Yes-associated protein) の核インポートが直接増加する. この機械感知メカニズムは 癌や再生のようなプロセスにおける 転写制御に影響を与えます
科学分野:
- 細胞生物学
- バイオ物理学
- 分子生物学
背景:
- 転写レギュラーであるYAP (Yes-associated protein) は,がん,再生,臓器のサイズ制御に不可欠です.
- 細胞の機械的な力がYAPの活動に影響することは知られていますが,直接的なメカニズムは不明です.
研究 の 目的:
- 核に直接適用される機械的な力が,YAPの核転移にどのように影響するかを調査する.
- この力に依存した輸送を媒介する核毛穴の役割を解明する.
主な方法:
- 細胞核に直接力を加える テクニックを活用しました
- 核孔の力学的性質を研究した.
- YAPの核の輸入と他の分子輸送を評価した.
主要な成果:
- 核に及ぼす外部の力は,YAPの核輸入を直接促進する.
- 基板の硬さが増加すると 細胞骨格の結合が生まれ 力を核に伝達する.
- 核の平ら化により,核孔の機械的制限が減り,分子輸送が促進される.
- タンパク質の機械的安定性は 核の毛穴を通る輸送に影響する.
結論:
- 核孔は直接的なメカニカルセンサとして機能し 機械的なシグナルに反応して YAPの輸送を制御します
- YAPで実証されたこのメカニズムは,転写調節に対するより広範な意味を持つ可能性があります.
- 細胞のメカノセンシングは 核毛孔複合体の機能と タンパク質の輸送と直接関連しています
関連する概念動画
Regulation of Nuclear Protein Sorting
3.4K
Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...
3.4K
Nuclear Export
5.0K
The nucleus restricts several proteins within and allows others to pass. The restricted proteins possess a nuclear retention sequence or NRS, anchoring them to the nuclear lamins and preventing their transport to the cytosol. The non-restricted proteins, after their synthesis, are transported to their site of action, such as the cytosol or other organelles, with the help of nuclear export signals or NES.
NES are of three types- the canonical 10-residue long leucine-rich signal and other...
NES are of three types- the canonical 10-residue long leucine-rich signal and other...
5.0K
Nuclear Protein Sorting
6.5K
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...
6.5K
Directionality of Nuclear Transport
4.7K
Ras-related nuclear protein or Ran is a small G protein that cycles between its GTP and GDP bound states. Ran specific regulators, a Ran GTPase Activating Protein or RanGAP present in the cytosol and a Ran guanine nucleotide exchange factor or RanGEF present inside the nucleus regulate GTP/GDP exchange. A high concentration of GTP inside the cells, in addition to this asymmetric distribution of Ran-specific regulators, leads to a higher RanGTP concentration inside the nucleus. This...
4.7K
Nuclear Export of mRNA
8.9K
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...
8.9K
Nuclear Export of mRNA
5.5K
5.5K

