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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...
Position-effect Variegation02:32

Position-effect Variegation

In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
Duplication of Chromatin Structure02:05

Duplication of Chromatin Structure

The process of chromosome duplication during cell division requires genome-wide disruption and re-assembly of chromatin. The chromatin structure must be accurately inherited, reassembled, and maintained in the daughter cells to ensure lineage propagation.
The basic unit of the chromatin is the nucleosome, consisting of DNA wrapped around octameric histone proteins and short stretches of linker DNA separating individual nucleosomes. The histone proteins within the nucleosome have their...
Nucleosome Remodeling02:54

Nucleosome Remodeling

Nucleosomes are the basic units of chromatin compaction. Each nucleosome consists of the DNA bound tightly around a histone core, which makes the DNA inaccessible to DNA binding proteins such as DNA polymerase and RNA polymerase. Hence, the fundamental problem is to ensure access to DNA when appropriate, despite the compact and protective chromatin structure.
Nucleosome remodeling complex
Eukaryotic cells have specialized enzymes called ATP-dependent nucleosome remodeling enzymes. These enzymes...
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...
Inheritance of Chromatin Structures03:17

Inheritance of Chromatin Structures

Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying DNA...

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関連する実験動画

Updated: Jul 6, 2026

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

染色体ダイナミクスと遺伝子ポジショニング

R Ileng Kumaran1, Rajika Thakar, David L Spector

  • 1Cold Spring Harbor Laboratory, One Bungtown Road, Cold Spring Harbor, NY 11724, USA.

Cell
|March 25, 2008
PubMed
まとめ
この要約は機械生成です。

細胞核は遺伝子を動的に組織する. アクチンとミオシンは遺伝子運動と発現に影響を与え,核の組織と活動に影響を与えます.

さらに関連する動画

An Integrated Platform for Genome-wide Mapping of Chromatin States Using High-throughput ChIP-sequencing in Tumor Tissues
10:41

An Integrated Platform for Genome-wide Mapping of Chromatin States Using High-throughput ChIP-sequencing in Tumor Tissues

Published on: April 5, 2018

Chromatin Immunoprecipitation (ChIP) in Mouse T-cell Lines
11:39

Chromatin Immunoprecipitation (ChIP) in Mouse T-cell Lines

Published on: June 17, 2017

関連する実験動画

Last Updated: Jul 6, 2026

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

An Integrated Platform for Genome-wide Mapping of Chromatin States Using High-throughput ChIP-sequencing in Tumor Tissues
10:41

An Integrated Platform for Genome-wide Mapping of Chromatin States Using High-throughput ChIP-sequencing in Tumor Tissues

Published on: April 5, 2018

Chromatin Immunoprecipitation (ChIP) in Mouse T-cell Lines
11:39

Chromatin Immunoprecipitation (ChIP) in Mouse T-cell Lines

Published on: June 17, 2017

科学分野:

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

背景:

  • 哺乳類の細胞核は,ゲノム組織とタンパク質の相互作用を通じて遺伝子発現を調節する.
  • 遺伝子ダイナミクスと染色体間相互作用は,重要な研究分野である.
  • 染色体ダイナミクスにおけるアクチンとミオシンの役割は,ますます認識されています.

研究 の 目的:

  • インターフェーズゲノムダイナミクスに関する現在の理解をレビューする.
  • ゲノムダイナミクスが核組織に与える影響について議論する.
  • ゲノムダイナミクスと遺伝子活動との関係を調査する.

主な方法:

  • 最近の研究に関する文献レビュー.
  • クロマチンの動態に関する実験的発見の議論.
  • 核組織と遺伝子調節に関するデータの合成.

主要な成果:

  • 特定の遺伝子は,核内で高いダイナミズムを示します.
  • アクチンとミオシンは,クロマチン運動の調節に関与しています.
  • ゲノム組織は遺伝子発現に大きく影響する.

結論:

  • ゲノムダイナミクスを理解することは,核組織の理解に不可欠です.
  • アクチンとミオシンは,遺伝子調節において重要な役割を果たします.
  • インターフェーズゲノムダイナミクスは,全体的な遺伝子活動と核機能に影響を与えます.