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ドロソフィラ・アトロフィン・ホモログは,多種多様な発達過程において,転写的なコアプレッサーとして機能する
Sheng Zhang1, Lei Xu, Janet Lee
1Howard Hughes Medical Institute, Department of Genetics, Yale University School of Medicine, 295 Congress Avenue, New Haven, CT 06535, USA.
Cell
|January 17, 2002
まとめ
Dentatorubral-pallidoluysian atrophyは,アトロフィン-1タンパク質と関連しています. この研究は,アトロフィンタンパク質がトランスクリプションのコアプレッサーとして作用することを明らかにし,トランスクリプションの規制緩和が神経変性に寄与することを示唆しています.
科学分野:
- 分子生物学は分子生物学である.
- 神経科学は神経科学である.
- 遺伝学 遺伝学とは
背景:
- Dentatorubral-pallidoluysian atrophy (DRPLA) は,アトロフィン-1タンパク質のポリグルタミン膨張に関連した神経変性疾患である.
- アトロフィン-1のインビボ機能はほとんど不明であり,DRPLAの病原性の理解を妨げています.
研究 の 目的:
- アトロフィンタンパク質のインビボ機能を調査する.
- 転写調節におけるアトロフィンの役割を調査する.
- 神経退行性疾患に対するアトロフィン機能障害の潜在的貢献を明らかにする.
主な方法:
- アトロフィン族のタンパク質をコードするドロソフィラ遺伝子の特徴.
- ドロソフィラの変異フェノタイプの分析.
- ドロソフィラ・アトロフィンとEven-skipped.の間のインビボおよびインビトロ結合アッセイ.
- ヒトのアトロフィン-1およびドロソフィラ・アトロフィンによるイン・ビボの転写抑制アッセイ.
主要な成果:
- ドロソフィラ・アトロフィン (Drosophila Atrophin) は胚のパターニングに不可欠であり,転写抑制剤と遺伝的に相互作用する.
- ドロソフィラ・アトロフィンは,Even-skippedに直接結合する.
- 人間のアトロフィン-1とドロソフィラ・アトロフィンは,体内での転写抑制剤として機能する.
- アトロフィン-1におけるポリグルトアミンの膨張は,その転写抑制活動を減少させます.
結論:
- アトロフィンタンパク質は,多用途のトランスクリプションコアプレッサーとして機能する.
- アトロフィンによって媒介される転写過程の調節障害は,DRPLA.のような神経変性疾患の病原化に寄与する可能性があります.
関連する概念動画
Transcription
Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Transcription
Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
RNA Polymerase II Accessory Proteins
Proteins that regulate transcription can do so either via direct contact with RNA Polymerase or through indirect interactions facilitated by adaptors, mediators, histone-modifying proteins, and nucleosome remodelers. Direct interactions to activate transcription is seen in bacteria as well as in some eukaryotic genes. In these cases, upstream activation sequences are adjacent to the promoters, and the activator proteins interact directly with the transcriptional machinery. For example, in...
Transcription
Transcription is the synthesis of RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in correctly synthesizing messenger RNA (mRNA). Transcriptional regulation is responsible for the differentiation of different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds of RNA Molecules
In eukaryotes,...
Transcription Can Produce Different Kinds of RNA Molecules
In eukaryotes,...
RNA Polymerase II Accessory Proteins
Proteins that regulate transcription can do so either via direct contact with RNA Polymerase or through indirect interactions facilitated by adaptors, mediators, histone-modifying proteins, and nucleosome remodelers. Direct interactions to activate transcription is seen in bacteria as well as in some eukaryotic genes. In these cases, upstream activation sequences are adjacent to the promoters, and the activator proteins interact directly with the transcriptional machinery. For example, in...
Transcription
Transcription is the synthesis of RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in correctly synthesizing messenger RNA (mRNA). Transcriptional regulation is responsible for the differentiation of different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds of RNA Molecules
In eukaryotes,...
Transcription Can Produce Different Kinds of RNA Molecules
In eukaryotes,...

