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関連する概念動画

Chromatin Position Affects Gene Expression02:35

Chromatin Position Affects Gene Expression

Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences  access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area. 
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the timing and level of...
Chromatin Structure Regulates pre-mRNA Processing02:41

Chromatin Structure Regulates pre-mRNA Processing

In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...
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...
Euchromatin01:01

Euchromatin

The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions take up more dye, appearing darker, while the less-compact areas take up less dye and appear lighter. Based on the compaction level, chromatins are classified into two primary forms – euchromatin and heterochromatin.
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
Euchromatin01:01

Euchromatin

The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions take up more dye, appearing darker, while the less-compact areas take up less dye and appear lighter. Based on the compaction level, chromatins are classified into two primary forms – euchromatin and heterochromatin.
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
Heterochromatin02:38

Heterochromatin

The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions that take up more dye are called heterochromatin. Heterochromatin is further classified into two forms – constitutive heterochromatin and facultative heterochromatin.
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at 9th...

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関連する実験動画

Updated: Jun 16, 2026

Mapping Absolute DNA Density in Cell Nuclei using Single-molecule Localization Microscopy
10:57

Mapping Absolute DNA Density in Cell Nuclei using Single-molecule Localization Microscopy

Published on: November 11, 2025

染色素に結合した核毛孔成分は,より高いエウカリオットにおける遺伝子発現を調節する.

Maya Capelson1, Yun Liang, Roberta Schulte

  • 1Molecular and Cellular Biology Laboratory, The Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA.

Cell
|February 11, 2010
PubMed
まとめ
この要約は機械生成です。

核孔複合タンパク質Sec13とNup98は,果物ハエの遺伝子発現を調節する. ノックダウンは遺伝子転写と再活性化を阻害し,多細胞遺伝子プログラムにおけるその役割を強調しています.

さらに関連する動画

Repressing Gene Transcription by Redirecting Cellular Machinery with Chemical Epigenetic Modifiers
10:28

Repressing Gene Transcription by Redirecting Cellular Machinery with Chemical Epigenetic Modifiers

Published on: September 20, 2018

Getting an A with the 3Cs: Chromosome Conformation Capture for Undergraduates
09:13

Getting an A with the 3Cs: Chromosome Conformation Capture for Undergraduates

Published on: May 12, 2023

関連する実験動画

Last Updated: Jun 16, 2026

Mapping Absolute DNA Density in Cell Nuclei using Single-molecule Localization Microscopy
10:57

Mapping Absolute DNA Density in Cell Nuclei using Single-molecule Localization Microscopy

Published on: November 11, 2025

Repressing Gene Transcription by Redirecting Cellular Machinery with Chemical Epigenetic Modifiers
10:28

Repressing Gene Transcription by Redirecting Cellular Machinery with Chemical Epigenetic Modifiers

Published on: September 20, 2018

Getting an A with the 3Cs: Chromosome Conformation Capture for Undergraduates
09:13

Getting an A with the 3Cs: Chromosome Conformation Capture for Undergraduates

Published on: May 12, 2023

科学分野:

  • 分子生物学は分子生物学である.
  • 遺伝学 遺伝学とは
  • 細胞生物学 細胞生物学

背景:

  • 核孔複合体 (NPC) は,遺伝子の活性化に影響することが知られている.
  • メタゾアンの転写調節におけるNPCの役割は完全に理解されていません.

研究 の 目的:

  • 特定ヌクレオポリンがメタゾアンの遺伝子調節に関与するかを調査する.
  • 転写におけるNPCコンポーネントの機能的重要性を決定する.

主な方法:

  • ドロソフィラのヌクレオポリンSec13,Nup98,Nup88およびFG-リピートヌクレオポリンに関する全ゲノム結合分析.
  • RNA干渉 (RNAi) 媒介によるSec13とNup98.8.のノックダウン
  • 熱ショック後の遺伝子転写と再活性化の評価.

主要な成果:

  • Sec13,Nup98およびFG-リピートヌクレオポリンが,異なるゲノムロシに結合し,しばしば核封筒には結合しない.
  • Nup88は静かな位置に局所化し,Sec13,Nup98およびいくつかのFG-リピートヌクレオポリンが転写的に活性な遺伝子と関連しています.
  • 内核のSec13とNup98をノックダウンすることで,標的遺伝子の転写を阻害し,熱ショック後の再活性化を防ぐ.

結論:

  • 内核核ポリンSec13とNup98は,多細胞生物の遺伝子発現プログラムを調節するために不可欠です.
  • NPCコンポーネントは,核輸送を超えて重要な役割を果たし,複雑な遺伝子発現ダイナミクスに影響を与えます.