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関連する概念動画

Amines to Amides: Acylation of Amines01:19

Amines to Amides: Acylation of Amines

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Various carboxylic acid derivatives (such as acid chlorides, esters, and anhydrides) can be used for the acylation of amines to yield amides. The reaction requires two equivalents of amines. The first amine molecule functions as a nucleophile and attacks the carbonyl carbon to produce a tetrahedral intermediate. This is followed by the loss of the leaving group and restoration of the C=O bond.
Next, the second equivalent of amine serves as a Brønsted base and deprotonates the quaternary...
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RNA Interference01:23

RNA Interference

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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...
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RNA Structure01:23

RNA Structure

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Overview
The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA): messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three RNA types consist of a...
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RNA Stability01:53

RNA Stability

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Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
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RNA Splicing01:32

RNA Splicing

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Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
60.7K
Nucleophilic Acyl Substitution of Carboxylic Acid Derivatives01:15

Nucleophilic Acyl Substitution of Carboxylic Acid Derivatives

5.0K
Nucleophilic acyl substitution is an important class of substitution reactions involving a nucleophile and an acyl compound, such as carboxylic acids and their derivatives. In these reactions, the leaving group attached to the acyl group is substituted by a nucleophile. The general mechanism proceeds via two steps.
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Updated: Feb 14, 2026

Detection of Protein S-Acylation using Acyl-Resin Assisted Capture
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Detection of Protein S-Acylation using Acyl-Resin Assisted Capture

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フォトリバーシブル・アサイレーションによるRNA制御

Willem A Velema1, Anna M Kietrys1, Eric T Kool1

  • 1Department of Chemistry , Stanford University , Stanford , California 94305 , United States.

Journal of the American Chemical Society
|February 24, 2018
PubMed
まとめ
この要約は機械生成です。

研究者はRNA機能の外部光制御のための新しい方法を開発しました. この技術により,RNAのハイブリッド化と触媒活動の光学的なスイッチングが可能になり,生物学的研究における応用が拡大されます.

さらに関連する動画

Metabolic Glycoengineering of Sialic Acid Using N-acyl-modified Mannosamines
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Metabolic Glycoengineering of Sialic Acid Using N-acyl-modified Mannosamines

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Metal-free Synthesis of Ynones from Acyl Chlorides and Potassium Alkynyltrifluoroborate Salts
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Metal-free Synthesis of Ynones from Acyl Chlorides and Potassium Alkynyltrifluoroborate Salts

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関連する実験動画

Last Updated: Feb 14, 2026

Detection of Protein S-Acylation using Acyl-Resin Assisted Capture
08:31

Detection of Protein S-Acylation using Acyl-Resin Assisted Capture

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Metabolic Glycoengineering of Sialic Acid Using N-acyl-modified Mannosamines
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Metabolic Glycoengineering of Sialic Acid Using N-acyl-modified Mannosamines

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Metal-free Synthesis of Ynones from Acyl Chlorides and Potassium Alkynyltrifluoroborate Salts
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Metal-free Synthesis of Ynones from Acyl Chlorides and Potassium Alkynyltrifluoroborate Salts

Published on: February 24, 2015

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科学分野:

  • 分子生物学
  • 生物化学
  • 化学生物学

背景:

  • 核酸生物学の研究には,RNA機能の外部光制御が不可欠である.
  • フォトケージド核塩基を用いた現在の方法は,短い合成RNAに限られている.

研究 の 目的:

  • RNAの光制御のための新しい合成後の方法を開発する.
  • RNAのハイブリッド化,折り畳み,触媒機能の光学制御を可能にします.

主な方法:

  • 2'-ヒドロキシル基と光保護基の合成後のアサイル化
  • RNAのハイブリデーションをブロックし,復元するための光保護群の1段階導入.
  • ハンマーヘッドリボ酵素の活性を制御するために,ポリアサイレーション (隠蔽) を適用する.
  • 細胞研究のための237 ntRNAアプタマーでの実証.

主要な成果:

  • 効率的にRNAのハイブリッド化を阻害し,これは光にさらされると逆転する.
  • ハンマーヘッドリボ酵素を用いてRNAの触媒機能を光学的に制御する.
  • 転写されたアプタマーを使用して,細胞の文脈でRNAの折り畳みを成功裏に切り替えます.

結論:

  • 新しい合成後のアサイラ法により,RNAの機能を光制御できます.
  • このアプローチは,生物学的研究のための光制御可能なRNAの有用性を拡大します.
  • この方法は,細胞内のRNAの動作の光学スイッチングを必要とするアプリケーションの可能性を示している.