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相关概念视频

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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相关实验视频

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

通过静电和堆叠相互作用,为高度稳定的"基配对"提供正电荷基替代体.

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
概括

阴离子染料"基对"通过静电和堆叠力显著稳定DNA复合体. 使用这些染料对修改的DNA比原生DNA具有更高的化温度,稳定性随着染料度的增加而增加.

科学领域:

  • 合成化学 合成化学
  • 分子生物学分子生物学
  • 生物物理化学 生物物理化学

背景情况:

  • 氧化核酸 (ODN) 在分子生物学和治疗学中至关重要.
  • 稳定DNA复合体是各种应用的关键,包括诊断和药物输送.
  • 将合成分子纳入DNA提供了新的功能.

研究的目的:

  • 为了研究将阴离子染料"基对"纳入ODN的稳定效应.
  • 为了评估静电和堆叠相互作用对DNA双重稳定性的影响.
  • 为了比较修改后的ODN与原生序列和含中性染料的序列的热稳定性.

主要方法:

  • 合成含有p-methylstilbazole阴阳性染料"基对"的寡氧化核酸 (ODN).
  • 热变质研究 (化温度测量) 以评估双重稳定性.
  • 对修改后的ODN,使用中性染料的ODN和原生ODN进行比较分析.

主要成果:

  • 加入p-methylstilbazole阴离子染料"基对"大大稳定了ODN双重.
  • 与原生基对和使用中性染料的ODN相比,修改后的ODN的化温度明显更高.
  • 增加了阴离子染料"基对"的数量,导致了进一步增强的双重稳定.

更多相关视频

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

相关实验视频

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

结论:

  • 阴离子染料"基对"有效地通过静电和堆叠相互作用稳定DNA复合体.
  • 这种修改为增强寡核酸的热稳定性提供了一个有希望的策略.
  • 这些发现对基于稳定的核酸结构和治疗的设计有影响.