トランスクリプション式静音化PreQ1リボスイッチの合理的な再設計
Ming-Cheng Wu1, Phillip T Lowe1, Christopher J Robinson1
1School of Chemistry and Manchester Institute of Biotechnology, The University of Manchester, 131 Princess Street, Manchester M1 7DN, United Kingdom.
Journal of the American Chemical Society
|June 25, 2015
まとめ
科学者たちはPreQ1リボスイッチを設計して,直角のOFFスイッチを作成し,合成分子を使用して遺伝子抑制を可能にしました. この合理的なアプローチは,合成生物学とバイオテクノロジーの応用のための新しいプラットフォームを提供します.
科学分野:
- 合成生物学 合成生物学とは
- バイオテクノロジー バイオテクノロジー
- 分子生物学は分子生物学である.
背景:
- リボスイッチは遺伝子発現を制御する遺伝子ツールです.
- 自然のリボスイッチは,細胞の代謝物質に反応する.
- 以前の方法は,オンスイッチを設計するために広範なスクリーニングを使用していました.
研究 の 目的:
- PreQ1のリボスイッチを使用して,直角のOFFスイッチを設計する.
- リボスイッチ再設計のための合理的で有目的なアプローチを開発する.
- バイオテクノロジーの新たな規制要素を創出する.
主な方法:
- PreQ1のリボスイッチを再設計するために,合理的なターゲティングデザインが使用されました.
- 7つのリボスイッチ変異体が6つの合成化合物で評価されました.
- バチルス・サブティリスの遺伝子発現抑制を評価した.
主要な成果:
- 直角リボスイッチ-リガンドのペアリングが特定されました.
- このペアリングは,標的遺伝子の転写を効果的に抑制しました.
- 再設計アプローチは合理化され,別のリボスイッチクラスに拡張されました.
結論:
- 合理的なアプローチにより,PreQ1リボスイッチOFFスイッチの正交形が成功しました.
- この方法は,新しい規制コンポーネントを開発するためのプラットフォームを提供します.
- アプリケーションには,遺伝子機能分析と抗菌薬スクリーニングが含まれています.
関連する概念動画
Transcriptional Regulation: Riboswitches
1.1K
Riboswitches are RNA elements that regulate gene expression by altering their secondary structures in response to specific effector molecules. These elements, located in the leader regions of certain mRNAs, act as transcriptional regulators by toggling between alternative conformations to control downstream gene expression. Riboswitch-mediated regulation is a precise mechanism for modulating biosynthetic pathways, as exemplified by the riboflavin biosynthesis pathway in Bacillus...
1.1K
Riboswitches
10.1K
Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
10.1K
Experimental RNAi
8.4K
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...
8.4K
RNA Interference
28.7K
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
28.7K
RNA Interference
7.9K
7.9K
Translational Regulation
848
Translational regulation in prokaryotes ensures efficient protein synthesis by controlling ribosome access to mRNA. This regulation is mediated by secondary RNA structures, including translational riboswitches, RNA thermometers, and small RNAs (sRNAs), which respond to intracellular and environmental signals to modulate gene expression.Translational RiboswitchesRiboswitches in the leader region of mRNAs can regulate translation by altering the accessibility of the Shine-Dalgarno (SD) sequence,...
848


