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関連する概念動画

DNA Packaging00:58

DNA Packaging

Overview
Transcription Factors02:16

Transcription Factors

Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
DNA Packaging00:58

DNA Packaging

Overview
Transcription Factors02:16

Transcription Factors

Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
Transcription Initiation01:47

Transcription Initiation

Initiation is the first step of transcription in eukaryotes. Prokaryotic RNA Polymerase (RNAP) can bind to the template DNA and start transcribing. On the other hand, transcription in eukaryotes requires additional proteins, called transcription factors, to first bind to the promoter region in the DNA template. This binding helps recruit the specific RNAP that can assemble on the DNA and start transcription.
The promoters and enhancers and their accessory proteins allow tight regulation of...
General Transcription Factors01:30

General Transcription Factors

Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...

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Updated: Jul 9, 2026

Mapping Genome-wide Accessible Chromatin in Primary Human T Lymphocytes by ATAC-Seq
09:08

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Published on: November 13, 2017

TFIIICボックスがゲノムに含まれています.

Lori L Wallrath1, Pamela K Geyer

  • 1Department of Biochemistry, University of Iowa, Iowa City, IA 52242, USA.

Cell
|June 6, 2006
PubMed
まとめ
この要約は機械生成です。

B-ボックスとTFIIICタンパク質は,酵母におけるヘテロクロマチンの拡散を制限する. TFIIIC結合部位は核の縁に集まって,この複合体の全ゲノムにわたるバリア機能を示しています.

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Last Updated: Jul 9, 2026

Mapping Genome-wide Accessible Chromatin in Primary Human T Lymphocytes by ATAC-Seq
09:08

Mapping Genome-wide Accessible Chromatin in Primary Human T Lymphocytes by ATAC-Seq

Published on: November 13, 2017

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科学分野:

  • 遺伝学と分子生物学について
  • エピジェネティクス エピジェネティクス
  • イーストゲノミクス イーストゲノミクス

背景:

  • ヘテロクロマチンの形成は,ゲノム安定性と遺伝子調節に不可欠です.
  • ヘテロクロマチン拡散を制限するメカニズムは完全に理解されていません.
  • 分裂酵母は,クロマチンのダイナミクスを研究するためのモデル生物として機能しています.

研究 の 目的:

  • 分裂酵母におけるヘテロクロマチン調節におけるBボックスとTFIIICの役割を調査する.
  • TFIIICのゲノム分布と機能を決定する.
  • ヘテロクロマチン伝播を制限する要因を特定する.

主な方法:

  • TFIIIC局所化のためのクロマチン免疫降水 (ChIP).
  • 特定のゲノム位置におけるヘテロクロマチンマーカーの分析.
  • TFIIIC結合部位の全ゲノムプロファイリング.

主要な成果:

  • BボックスとTFIIICは,静かな交配型の領域でのヘテロクロマチン拡散を制限することが判明しました.
  • 総合的な分析により,TFIIICの関連サイトが分散していることが明らかになった.
  • TFIIICの結合部位は,好ましく核の周辺に蓄積される.

結論:

  • TFIIICは,ヘテロクロマチンの制御不能な拡散を防ぐのに重要な役割を果たしています.
  • TFIIICは,異なる染色体状態を維持するゲノムバリアとして機能する可能性があります.
  • TFIIICの核周辺の局所化は,ゲノム構造の組織化における役割を示唆している.