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関連する概念動画

Nuclear Protein Sorting01:34

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...
Nuclear Export01:42

Nuclear Export

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...
Nuclear Localization Signals and Import01:46

Nuclear Localization Signals and Import

Proteins targeted to the nucleus carry short stretches of amino acid sequences called the nuclear localization signal or NLS. Classical nuclear localization signals are of two types: monopartite and bipartite NLS. Monopartite classical NLS (cNLS) consists of a single cluster of 4-8 amino acids. Bipartite cNLS consists of two clusters of  2-3 amino acids and a 9-12 residue long proline-rich linker bridging the two clusters. Signal clusters are rich in positively charged amino acids such as...
Directionality of Nuclear Transport01:42

Directionality of Nuclear Transport

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...
Transducer Mechanism: Nuclear Receptors01:31

Transducer Mechanism: Nuclear Receptors

Nuclear receptors, or NRs, are unique transcription factors that regulate gene transcription and affect the cellular pathways involved in reproduction, development, or metabolism. Their ability to be stimulated by small lipophilic ligands and control vital cellular processes makes them ideal drug targets. Nearly 10-15% of currently prescribed drugs target these receptors.
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
Regulation of Nuclear Protein Sorting01:45

Regulation of Nuclear Protein Sorting

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...

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関連する実験動画

Updated: May 13, 2026

Single-Molecule Imaging of Nuclear Transport
12:13

Single-Molecule Imaging of Nuclear Transport

Published on: June 9, 2010

核の位置づけは,核の位置づけです.

Gregg G Gundersen1, Howard J Worman

  • 1Department of Pathology and Cell Biology, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA. ggg1@columbia.edu

Cell
|March 19, 2013
PubMed
まとめ
この要約は機械生成です。

細胞核は,しばしば中心部にあり,細胞の分裂や移動などの機能をサポートするために非対称的に動きます. タンパク質と細胞骨格の力が,この運動を駆動し,健康と病気の予防に不可欠です.

さらに関連する動画

Exploiting Live Imaging to Track Nuclei During Myoblast Differentiation and Fusion
09:03

Exploiting Live Imaging to Track Nuclei During Myoblast Differentiation and Fusion

Published on: April 13, 2019

Heterokaryon Technique for Analysis of Cell Type-specific Localization
09:31

Heterokaryon Technique for Analysis of Cell Type-specific Localization

Published on: March 11, 2011

関連する実験動画

Last Updated: May 13, 2026

Single-Molecule Imaging of Nuclear Transport
12:13

Single-Molecule Imaging of Nuclear Transport

Published on: June 9, 2010

Exploiting Live Imaging to Track Nuclei During Myoblast Differentiation and Fusion
09:03

Exploiting Live Imaging to Track Nuclei During Myoblast Differentiation and Fusion

Published on: April 13, 2019

Heterokaryon Technique for Analysis of Cell Type-specific Localization
09:31

Heterokaryon Technique for Analysis of Cell Type-specific Localization

Published on: March 11, 2011

科学分野:

  • 細胞生物学 細胞生物学
  • 分子生物学は分子生物学である.
  • バイオフィジックス 生物物理学

背景:

  • 細胞核は典型的には中央にあるが,重要な細胞過程で位置が変化する.
  • 核の位置づけは,細胞の機能,組織,信号伝達に不可欠です.

研究 の 目的:

  • 核運動に関与するタンパク質機構と細胞骨格の力を探求する.
  • 病気における破壊された核定位の影響を強調する.
  • 細胞の組織とシグナル伝達における核位置の役割について議論する.

主な方法:

  • 核力学とタンパク質相互作用に関する文献のレビュー.
  • 細胞骨格の動態と力発生の分析.
  • 核定位欠陥に関連した疾患モデルの検討.

主要な成果:

  • 核の移動と固定を媒介する重要なタンパク質"ツールボックス"を特定した.
  • 細胞骨格力の結合と核輸送の結合を実証した.
  • 異常な核の位置づけが様々な遺伝疾患と関連している.

結論:

  • 核の位置づけは,特定のタンパク質複合体と細胞力によって制御されるダイナミックなプロセスです.
  • 適切な核の位置付けは,正常な細胞機能と生物の健康のために不可欠です.
  • 核定位に関するさらなる研究により,関連する疾患に対する新しい治療目標が明らかになる可能性があります.