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関連する概念動画

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...
Proofreading01:31

Proofreading

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 Enzyme
Proofreading01:43

Proofreading

Synthesis of new DNA molecules starts when DNA polymerase links nucleotides together in a sequence that is complementary to the template DNA strand. DNA polymerase has a higher affinity for the correct base to ensure fidelity in DNA replication. The DNA polymerase furthermore proofreads 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 EnzymeGenomic DNA is synthesized in...
Base-pairing and DNA Repair02:27

Base-pairing and DNA Repair

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,

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Updated: Jun 21, 2026

Phthalic Acid Ester-Binding DNA Aptamer Selection, Characterization, and Application to an Electrochemical Aptasensor
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静電とスタッキングの相互作用を通して,非常に安定した"塩基配合"のための正電荷の塩基代用体.

Hiromu Kashida1, Hidehiro Ito, Taiga Fujii

  • 1Graduate School of Engineering, Nagoya University, Furocho, Chikusa-ku, Nagoya 464-8603, Japan.

Journal of the American Chemical Society
|July 9, 2009
PubMed
まとめ

カチオン染料の"塩基対"は,静電力と堆積力によってDNA複合体を著しく安定させる. これらの染料のペアを持つ改変DNAは,ネイティブDNAよりも高い融解温度を示し,染料濃度に応じて安定性が増加します.

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Nucleoside Triphosphates - From Synthesis to Biochemical Characterization
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Nucleoside Triphosphates - From Synthesis to Biochemical Characterization

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Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids
09:04

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

Published on: September 21, 2017

関連する実験動画

Last Updated: Jun 21, 2026

Phthalic Acid Ester-Binding DNA Aptamer Selection, Characterization, and Application to an Electrochemical Aptasensor
09:33

Phthalic Acid Ester-Binding DNA Aptamer Selection, Characterization, and Application to an Electrochemical Aptasensor

Published on: March 21, 2018

Nucleoside Triphosphates - From Synthesis to Biochemical Characterization
15:22

Nucleoside Triphosphates - From Synthesis to Biochemical Characterization

Published on: April 3, 2014

Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids
09:04

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

Published on: September 21, 2017

科学分野:

  • 合成化学とは
  • 分子生物学は分子生物学である.
  • 生物物理化学 生物物理化学とは

背景:

  • オリゴデオキシリボヌクレオチド (ODN) は,分子生物学と治療において極めて重要です.
  • DNA二重複の安定化は,診断と薬物投与を含む様々なアプリケーションの鍵です.
  • 合成分子をDNAに組み込むことは,新しい機能を提供します.

研究 の 目的:

  • 定性染料の"塩基対"をODNに組み込むことで生じる安定効果を研究する.
  • 静電相互作用と堆積相互作用がDNA複合体の安定性に与える影響を評価する.
  • 改変されたODNの熱安定性をネイティブ配列と中性染料を含む配列と比較する.

主な方法:

  • p-メチルスティルバゾールを含むオリゴデオキシリボヌクレオチド (ODN) の合成 カチオン染料"塩基対".
  • デュプレックス安定性を評価するための熱性デナチュレーション試験 (融解温度測定)
  • 改造されたODN,中性染料を使ったODN,ネイティブODNの比較分析.

主要な成果:

  • p-メチルスティルバゾールカチオニック染料"塩基対"の組み込みはODN複合体を大きく安定させました.
  • 改造されたODNは,ネイティブベースペアと中性染料を使用したODNと比較して,著しく高い融解温度を示した.
  • カチオンの染料"塩基対"の数が増えたことで,さらにダプレックス安定化が強化されました.

結論:

  • カチオン染料の"塩基対"は,静電相互作用と堆積相互作用によってDNA複合体を安定させるのに効果的です.
  • この改変は,オリゴヌクレオチドの熱安定性を高めるための有望な戦略を提供します.
  • この発見は,安定した核酸ベースの構造と治療法の設計に意味を持つ.