関連する実験動画
Updated: Aug 5, 2026

07:44
High-throughput Purification of Affinity-tagged Recombinant Proteins
Published on: August 26, 2012
効率的な TATA ボックス結合と TFIID の in vitro 機能に必要な下流のイニシアチブ エレメントです
Y Nakatani1, M Horikoshi, M Brenner
1Laboratory of Molecular Biology, NINDS, National Institutes of Health, Bethesda, Maryland 20892.
Nature
|November 1, 1990
まとめ
膠質線維酸性タンパク質 (gfa) 遺伝子プロモーターは,効率的な転写のためにTATAボックスと下流のイニシアター要素の両方を必要とします. 天然ヒトのTFIIDは,クローン版とは異なり,両方の要素を結合し,追加の要因が転写開始を促進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.
- 遺伝子規制 遺伝子規制
- 神経科学は神経科学である.
背景:
- 膠質繊維酸性タンパク質 (gfa) 遺伝子は,膠質細胞の重要な中間線維タンパク質をコードする.
- プロモーター分析により,ヒトのgfa遺伝子には2つの異なるイニシアチブ要素が明らかになった:TATAボックスと下流のイニシアチブ要素.
研究 の 目的:
- 転写におけるgfaプロモーターのTATAボックスと下流のイニシアター要素の機能的役割を調査する.
- 自然人TFIIDおよびクローンTFIIDのこれらのプロモーター要素への結合特性を特徴づける.
主な方法:
- トランスフェクションアッセイは,培養細胞での転写のためのプロモーター要素の要件を評価するために使用されました.
- 検査室内転写アッセイとDNaseフットプリントは,部分的に浄化された天然ヒトTFIIDと,細菌で発現したクローンTFIIDで実施した.
- gfaプロモーターの削除分析が行われました.
主要な成果:
- TATAボックスとダウンストリームイニシアター要素は,効率的なgfa遺伝子転写に不可欠です.
- ヒトの天然のTFIIDは,TATAボックスとダウンストリームイニシアターの両方に結合し,ヒトのクローンおよび酵母TFIIDは,主にTATAボックスに結合する.
- ダウンストリームイニシアターの削除により,TATAボックスへのTFIID結合が損なわれ,転写が減少しました.
- クローンされたTFIIDは,TATAボックス・バインディングとトランスクリプションのダウンストリーム・イニシアターへの依存度が低いことを示した.
結論:
- gfa遺伝子の効率的な転写には,TATAボックスとダウンストリームイニシアターの協力的作用が必要です.
- ヒトの天然のTFIIDには,下流のイニシアターと相互作用し,TFIIDの結合を安定させ,転写を促進する追加の成分がある可能性が高い.
関連する概念動画
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 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...
The Eukaryotic Promoter Region
The eukaryotic promoter region is a segment of DNA located upstream of a gene. It contains an RNA polymerase binding site, a transcription start site, and several cis-regulatory sequences. The proximal promoter region is located in the vicinity of the gene and has cis-regulatory sequences and the core promoter. The core promoter is the binding site for RNA polymerase and is usually located between -35 and +35 nucleotides from the transcription start site. The distal promoter regions are...
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...
The promoters and enhancers and their accessory proteins allow tight regulation of...
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...
The Eukaryotic Promoter Region
The eukaryotic promoter region is a segment of DNA located upstream of a gene. It contains an RNA polymerase binding site, a transcription start site, and several cis-regulatory sequences. The proximal promoter region is located in the vicinity of the gene and has cis-regulatory sequences and the core promoter. The core promoter is the binding site for RNA polymerase and is usually located between -35 and +35 nucleotides from the transcription start site. The distal promoter regions are...

