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関連する概念動画

The Nucleosome Core Particle01:12

The Nucleosome Core Particle

2.8K
Nucleosomes are the DNA-histone complex, where the DNA strand is wound around the histone core. The histone core is an octamer containing two copies of H2A, H2B, H3, and H4 histone proteins.
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their primary aim is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. On the other hand, they must allow polymerase enzymes to access histone-bound DNA during...
2.8K
The Nucleosome Core Particle02:10

The Nucleosome Core Particle

15.5K
Nucleosomes are the DNA-histone complex, where the DNA strand is wound around the histone core. The histone core is an octamer containing two copies of H2A, H2B, H3, and H4 histone proteins.
The paradox
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their main responsibility is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. While on the other hand, they must allow polymerase enzymes to access DNA...
15.5K
Nucleosome Remodeling02:54

Nucleosome Remodeling

11.7K
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...
11.7K
Heterochromatin02:38

Heterochromatin

19.2K
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...
19.2K
Heterochromatin02:38

Heterochromatin

5.1K
5.1K
Inheritance of Chromatin Structures03:17

Inheritance of Chromatin Structures

8.0K
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...
8.0K

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Updated: Apr 19, 2026

Reconstitution of Nucleosomes with Differentially Isotope-labeled Sister Histones
09:26

Reconstitution of Nucleosomes with Differentially Isotope-labeled Sister Histones

Published on: March 26, 2017

11.7K

核細胞の分裂した人格.

Daniel J McKay1, Jason D Lieb2

  • 1Department of Biology, Department of Genetics, Integrative Program for Biological and Genome Sciences, The University of North Carolina at Chapel Hill, 250 Bell Tower Drive, Chapel Hill, NC 27599, USA.

Cell
|December 7, 2014
PubMed
まとめ
この要約は機械生成です。

この研究は,核群の核体を明らかにしています.

さらに関連する動画

Author Spotlight: Efficient Nucleosome Reconstitution for Single-Molecule Techniques
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Author Spotlight: Efficient Nucleosome Reconstitution for Single-Molecule Techniques

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Assembly of Nucleosomal Arrays from Recombinant Core Histones and Nucleosome Positioning DNA
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Assembly of Nucleosomal Arrays from Recombinant Core Histones and Nucleosome Positioning DNA

Published on: September 10, 2013

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関連する実験動画

Last Updated: Apr 19, 2026

Reconstitution of Nucleosomes with Differentially Isotope-labeled Sister Histones
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Reconstitution of Nucleosomes with Differentially Isotope-labeled Sister Histones

Published on: March 26, 2017

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Author Spotlight: Efficient Nucleosome Reconstitution for Single-Molecule Techniques
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Author Spotlight: Efficient Nucleosome Reconstitution for Single-Molecule Techniques

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Assembly of Nucleosomal Arrays from Recombinant Core Histones and Nucleosome Positioning DNA
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Assembly of Nucleosomal Arrays from Recombinant Core Histones and Nucleosome Positioning DNA

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科学分野:

  • 分子生物学は分子生物学である.
  • エピジェネティクス エピジェネティクス
  • 構造生物学 構造生物学とは

背景:

  • ヒストンタンパク質に包まれたDNAで構成される核体は,クロマチンの基本単位である.
  • 核子の構造とダイナミクスを理解することは,遺伝子の調節に不可欠です.
  • 以前のモデルでは,比較的静的な核細胞構造が描かれていた.

研究 の 目的:

  • ヌクレオソームの高解像度構造ダイナミクスを調査する.
  • ヒストンタンパク質とDNAの間の新しい相互作用を特定する.
  • ヒストンの改変と転写方向の関係を探求する.

主な方法:

  • 高解像度イメージング技術.
  • 生化学分析. 生化学的測定. 生化学的測定. 生化学的測定. 生化学的測定. 生化学的測定. 生化学的測定. 生化学的測定. 生化学的測定. 生化学的測定. 生化学的測定.
  • ヌクレオソームの構成要素の構造分析.

主要な成果:

  • ヒストン-DNA相互作用の詳細な可視化.
  • リンクナーDNAとの予想外のH3尾相互作用の発見.
  • 亜核体粒子の存在を裏付ける証拠.
  • 転写方向に関連した非対称なヒストンの改変パターンの特定.

結論:

  • ヌクレオソームは,これまで考えられていたよりも,よりダイナミックでモジュール化された構造である.
  • ヒストンの尾の相互作用と亜核体構造は,核体の機能において重要な役割を果たします.
  • 非対称ヒストンの改変は,核細胞レベルでの転写調節に関する洞察を提供します.