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関連する概念動画

Ribosomal RNA Synthesis02:53

Ribosomal RNA Synthesis

Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
Experimental RNAi02:15

Experimental RNAi

RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
Ribosome Profiling02:24

Ribosome Profiling

Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...

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関連する実験動画

Updated: Jul 1, 2026

Characterization of In Vitro Differentiation of Human Primary Keratinocytes by RNA-Seq Analysis
07:29

Characterization of In Vitro Differentiation of Human Primary Keratinocytes by RNA-Seq Analysis

Published on: May 16, 2020

微分5SRNA遺伝子発現はインビトロで行われている.

A P Wolffe1, D D Brown

  • 1Department of Embryology, Carnegie Institution of Washington, Baltimore, Maryland 21210.

Cell
|December 4, 1987
PubMed
まとめ

転写因子IIIA (TFIIIA) の濃度は,Xenopusの卵抽出物における5SRNA遺伝子転写を決定する. TFIIIAレベルを下げると,卵細胞遺伝子に対する体5SRNA遺伝子転写が強化され,異なる遺伝子調節メカニズムが明らかになる.

科学分野:

  • 発達生物学 発達生物学とは
  • 分子遺伝学 分子遺伝学
  • 遺伝子規制 遺伝子規制

背景:

  • 卵細胞とXenopusの体5SRNA遺伝子転写複合体は,活性化卵エキスで差異的な安定性を示しています.
  • 転写因子IIIA (TFIIIA) は5SRNA遺伝子転写における重要な調節因子である.

研究 の 目的:

  • クセノプスの卵抽出物における卵細胞と体内の5SRNA遺伝子転写複合体の差異的安定性を調査する.
  • 5S RNA遺伝子転写の調節におけるトランス作用因子,特にTFIIIAの役割を決定する.

主な方法:

  • 活性化されたXenopus卵からの抽出物を利用する.
  • 卵抽出物におけるTFIIIAの濃度を操作する.
  • 複製された体性および卵細胞5SRNA遺伝子の転写効率を比較する.

主要な成果:

  • オオサイト5SRNA遺伝子転写複合体は,体複合体とは異なり,活性化卵エキスで不安定化しています.
  • 不安定化された複合体内のトランス作用因子は,自由因子と均衡状態に存在し,転写を濃度に依存させる.
  • 卵抽出物におけるTFIIIAレベルを低下させると,卵細胞の遺伝子と比較して,クローンされた体性5SRNA遺伝子の転写が400倍まで増加した.

さらに関連する動画

Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells
10:34

Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells

Published on: December 9, 2022

Single Nucleotide Polymorphism-sensitive FISH Detection of Locus-specific Ribosomal RNA Transcription in Drosophila melanogaster
04:59

Single Nucleotide Polymorphism-sensitive FISH Detection of Locus-specific Ribosomal RNA Transcription in Drosophila melanogaster

Published on: March 28, 2025

関連する実験動画

Last Updated: Jul 1, 2026

Characterization of In Vitro Differentiation of Human Primary Keratinocytes by RNA-Seq Analysis
07:29

Characterization of In Vitro Differentiation of Human Primary Keratinocytes by RNA-Seq Analysis

Published on: May 16, 2020

Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells
10:34

Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells

Published on: December 9, 2022

Single Nucleotide Polymorphism-sensitive FISH Detection of Locus-specific Ribosomal RNA Transcription in Drosophila melanogaster
04:59

Single Nucleotide Polymorphism-sensitive FISH Detection of Locus-specific Ribosomal RNA Transcription in Drosophila melanogaster

Published on: March 28, 2025

結論:

  • TFIIIA濃度は,Xenopusの卵抽出物における5SRNA遺伝子転写の重要な制限因子である.
  • 卵細胞と体内の5SRNA遺伝子の異なる調節は,TFIIIAの可用性と複合体の安定性によって影響を受けます.