関連する実験動画
Updated: Jul 14, 2026

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Controllable Ion Channel Expression through Inducible Transient Transfection
Published on: February 17, 2017
まとめ
超巻きDNA,特に強化剤は,線形DNAよりも遺伝子発現を高めます. 強化剤とスーパーコイリングは,効率と転写因子結合を向上させ,遺伝子活動に影響を与えます.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝子発現の規制について
背景:
- 超巻きDNAコンフォームは遺伝子発現に影響を与えます.
- 強化剤は,遺伝子転写レベルを調節する上で重要な役割を果たします.
研究 の 目的:
- 遺伝子発現に対するDNAスーパーコイリングと強化剤の影響を調査する.
- スーパーコーリングとエンハンスターが転写因子の結合と活性に影響を与えるメカニズムを解明する.
主な方法:
- CV-1およびL細胞に超巻きおよび線形DNA (強化剤付きおよび無強化剤) のトランスフェクション.
- 異なる要素 (強化剤,促進剤) を含むプラズミッドを使用して,制限成分相互作用を評価する競争アッセイ.
主要な成果:
- 増強剤を搭載した超巻きDNAは,線形DNAと比較して,発現を大幅に増加させた.
- 2マイクログラムのDNA/皿での表現飽和度は,制限成分を使用する効率の向上を示唆しています.
- 強化剤は,プロモーターとペアリングされると,発現のために競争し,転写因子結合の増加を示します.
結論:
- スーパーコーリングと強化剤は,細胞の制限因子の使用を最適化することによって,遺伝子発現の効率を高めます.
- 増強剤は,転写因子結合を促進することによって,遺伝子発現を増加させます.
- スーパーコイリングは,結合転写因子によるプロモーターの活性化に影響を与えるようです.
関連する概念動画
Complementary DNA
Overview
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Topoisomerases are enzymes that relax overwound DNA molecules during various cell processes, including DNA replication and transcription. These enzymes regulate positive and negative DNA supercoiling without changing the nucleotide sequence. DNA overwinding in a clockwise direction results in positively supercoiled DNA, whereas underwinding in a counterclockwise direction produces negatively supercoiled DNA.
Types and Mechanism of action
Topoisomerases are divided into two main types. Type I...
Types and Mechanism of action
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Transposons make up a significant part of genomes of various organisms. Therefore, it is believed that transposition played a major evolutionary role in speciation by changing genome sizes and modifying gene expression patterns. For example, in bacteria, transposition can lead to conferring antibiotic resistance. Movement of transposable elements within the genetic pool of pathogenic bacteria can aid in transfer of antibiotic-resistant genetic elements. In eukaryotes, transposons can carry out...
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The donor site from where the transposon is excised is either degraded or...
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Microbial communities are dynamic environments where cell lysis releases free DNA into the surroundings. Other cells can take up this extracellular DNA through a process known as transformation.When a cell incorporates this foreign DNA into its genome, resulting in genetic modification, the process is known as transformation. Cells capable of this process are termed competent. Competence can be natural, as observed in certain bacteria and archaea, or artificially induced in the...

