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The DNA Helix01:16

The DNA Helix

Overview
DNA Base Pairing02:27

DNA Base Pairing

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,
DNA Base Pairing02:27

DNA Base Pairing

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,
Single-Strand DNA Binding Proteins01:03

Single-Strand DNA Binding Proteins

For successful DNA replication, the unwinding of double-stranded DNA must be accompanied by stabilization and protection of the separated single strands of the DNA. This crucial task is performed by single-strand DNA-binding (SSB) proteins. They bind to the DNA in a sequence-independent manner, which means that the nitrogenous bases of the DNA need not be present in a specific order for binding of SSB proteins to it. The binding of SSB proteins straightens single-stranded DNA (ssDNA) and makes...
Maxam-Gilbert Sequencing01:05

Maxam-Gilbert Sequencing

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...
Mismatch Repair01:20

Mismatch Repair

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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関連する実験動画

Updated: Jul 9, 2026

A G-quadruplex DNA-affinity Approach for Purification of Enzymatically Active G4 Resolvase1
11:25

A G-quadruplex DNA-affinity Approach for Purification of Enzymatically Active G4 Resolvase1

Published on: March 18, 2017

G-クアドルプレックス固有のペプチド・ヘミシアニンリガンドは,部分的組み合わせ選択による.

James A Schouten1, Sylvain Ladame, Stephen J Mason

  • 1University Chemical Laboratory, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK.

Journal of the American Chemical Society
|May 8, 2003
PubMed
まとめ

研究者らは,テトラペプチドとヘミシアニン基板を組み合わせて,新しいG-四重複 DNA リガンドを開発した. これらのリンガンドは,二重複 DNA 構造よりも,G-四重複 DNA に対して高い親和性と選択性を示す.

さらに関連する動画

In Vitro Chemical Mapping of G-Quadruplex DNA Structures by Bis-3-Chloropiperidines
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In Vitro Chemical Mapping of G-Quadruplex DNA Structures by Bis-3-Chloropiperidines

Published on: May 12, 2023

Single-Molecule Fluorescence Visualization of DNA Polymerase Dynamics at G-Quadruplexes
05:37

Single-Molecule Fluorescence Visualization of DNA Polymerase Dynamics at G-Quadruplexes

Published on: April 4, 2025

関連する実験動画

Last Updated: Jul 9, 2026

A G-quadruplex DNA-affinity Approach for Purification of Enzymatically Active G4 Resolvase1
11:25

A G-quadruplex DNA-affinity Approach for Purification of Enzymatically Active G4 Resolvase1

Published on: March 18, 2017

In Vitro Chemical Mapping of G-Quadruplex DNA Structures by Bis-3-Chloropiperidines
05:32

In Vitro Chemical Mapping of G-Quadruplex DNA Structures by Bis-3-Chloropiperidines

Published on: May 12, 2023

Single-Molecule Fluorescence Visualization of DNA Polymerase Dynamics at G-Quadruplexes
05:37

Single-Molecule Fluorescence Visualization of DNA Polymerase Dynamics at G-Quadruplexes

Published on: April 4, 2025

科学分野:

  • 薬用化学 薬用化学について
  • 分子生物学は分子生物学である.
  • バイオケミストリー バイオケミストリー

背景:

  • G四重複のDNA構造は,様々な生物学的プロセスに関与するユニークな核酸モチーフです.
  • G-四重複DNAの選択リガンドの開発は,治療および診断の応用において極めて重要です.
  • 既存のリガンドには,G-四重複DNAに十分な親和性や特異性がないことが多い.

研究 の 目的:

  • 新規のG四重複DNA特異リガンドの設計と合成を行う.
  • ペプチドベースのリガンドの結合親和性と選択性を高めるために.
  • G-四重複DNA認識におけるヘミシアニン・スキャフォルドの有用性を探求する.

主な方法:

  • テトラペプチドの組み合わせ選択.
  • 選択されたテトラペプチドをヘミシアニン基板に結合する.
  • G四重複のDNAと二重複のDNAの親和性および選択性アッセイ.

主要な成果:

  • 生成されたテトラペプチド-ヘミシアニン結合体は,G-四重複のDNAリガンドである.
  • ペプチド結合親和性を約1000倍向上させました.
  • G-四重複のDNAに対するマイクロモラー近親性を示した.
  • ダプレックスDNAに対する四重複のDNAの差別を40倍以上示した.

結論:

  • 開発されたテトラペプチド-ヘミシアニンリガンドは,G-四重複DNAに対する高い親和性と選択性を示しています.
  • ヘミシアニン・スキャフォードはペプチドの結合特性を大幅に強化します.
  • これらのリンガンドは,生物系におけるG四重複DNAを標的とする有望な候補である.