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DNA Base Pairing02:27

DNA Base Pairing

27.5K
Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,
27.5K
Proofreading01:31

Proofreading

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Synthesis of new DNA molecules is carried out by the enzyme DNA polymerase, which adds nucleotides on the daughter strand complementary to the template DNA strand. DNA polymerase has a higher affinity to add the correct base and ensures fidelity during DNA replication. Furthermore,  it exhibits proofreading activity during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.
Errors During Replication are Corrected by the DNA Polymerase...
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Base-pairing and DNA Repair02:27

Base-pairing and DNA Repair

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Mismatch Repair01:20

Mismatch Repair

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Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
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Maxam-Gilbert Sequencing01:05

Maxam-Gilbert Sequencing

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In the same year as the discovery of the Sanger sequencing method, another group of scientists, Allan Maxam and Walter Gilbert, demonstrated their chemical-cleavage method for DNA sequencing. The Maxam-Gilbert method relies on using different chemicals that can cleave the DNA sequence at specific sites, the separation of resulting DNA fragments of variable size using electrophoresis, and deciphering the DNA sequence from the resulting gel bands.
Challenges of the Maxam-Gilbert Method
The...
11.2K
Translesion DNA Polymerases02:10

Translesion DNA Polymerases

10.0K
Translesion (TLS) polymerases rescue stalled DNA polymerases at sites of damaged bases by replacing the replicative polymerase and installing a nucleotide across the damaged site. Doing so, TLS allows additional time for the cell to repair the damage before resuming regular DNA replication.
TLS polymerases are found in all three domains of life - archaea, bacteria, and eukaryotes. Of the different classes of TLS polymerases, members of the Y family are fitted with specialized structures that...
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AMP Aptamerは,カノニカルベースペアリングなしでDNAタイルの結合をプログラムします.

Zhe Zhang1, Jin Jin1, Victoria E Paluzzi2

  • 1Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China.

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|August 28, 2023
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まとめ
この要約は機械生成です。

研究者らは,精密なナノ構造の組み立てのために,リガンド-アプタマー結合を用いた新しいDNAタイルを開発した. このDNA自己組み立て方法は ナノテクノロジーや材料科学の応用に 新たな可能性をもたらします

さらに関連する動画

Self-assembly of Complex Two-dimensional Shapes from Single-stranded DNA Tiles
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Self-assembly of Complex Two-dimensional Shapes from Single-stranded DNA Tiles

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Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids
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Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids

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関連する実験動画

Last Updated: Jul 17, 2025

Mapping the Binding Site of an Aptamer on ATP Using MicroScale Thermophoresis
08:09

Mapping the Binding Site of an Aptamer on ATP Using MicroScale Thermophoresis

Published on: January 7, 2017

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Self-assembly of Complex Two-dimensional Shapes from Single-stranded DNA Tiles
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Self-assembly of Complex Two-dimensional Shapes from Single-stranded DNA Tiles

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Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids
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科学分野:

  • バイオテクノロジー
  • ナノテクノロジー
  • 材料科学

背景:

  • タイルベースのDNAセルフアセンブリは ナノ構造を作るための重要な方法です
  • 現在の方法は主にワトソン・クリックの塩基配列の相互作用に依存している.

研究 の 目的:

  • リガンドとアプタマーの両方を組み込むDNAタイルの設計と実証.
  • リガンド-アプタマー結合相互作用を通じてDNAナノ構造の組み立てを可能にします.

主な方法:

  • 統合されたリガンドとアプタマーを持つDNAタイルの設計.
  • 特定のリガンド-アプタマー結合イベントによって誘発されるナノ構造の組成.
  • ゲル電泳と原子力顕微鏡を用いた特徴化.

主要な成果:

  • ゲオメトリカルに定義された DNA ナノ構造を組み立てました
  • リガンド- アプタマー結合の有効性を示した.
  • 特徴づけられたナノ構造は 組み立てと設計の成功を確認します

結論:

  • リガンド-アプタマー結合はDNAタイルの結合のための新しいメカニズムを提供します.
  • このアプローチは DNA 自己組み立ての能力を 拡張します
  • ナノ構造の形成を調節し,生物学的リガンドを感知する可能性がある.