合成和描述含有formamidopyrimidine病变的寡氧核酸和非水解类型的类型
Kazuhiro Haraguchi1, Michael O Delaney, Carissa J Wiederholt
1Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA.
Journal of the American Chemical Society
|March 28, 2002
概括
这项研究合成了带有formamidopyrimidine病变的DNA和C-核酸相似物. 这些修改后的DNA结构表现出变化的化温度和不同的性可变性,影响了它们的稳定性和检测.
科学领域:
- 化学生物学 化学生物学
- 核酸化学的核酸化学
- DNA损伤和修复的过程
背景情况:
- 甲基米多皮里米丁病变是由于氧化损伤导致的常见DNA添加物.
- 了解这些病变的结构和化学特性对于DNA修复研究至关重要.
- C-核酸类似物提供了改造的结构,以探测损伤行为.
研究的目的:
- 合成含有特定形式胺胺酸损伤的寡氧核酸和C核酸类似物.
- 研究这些修改对DNA双重复合稳定性的影响 (化温度,T(M)).
- 为了检测目的,评估合成病变的性可变性.
主要方法:
- 改性寡氧核酸的固体相合成.
- 酵素结合用于特定结构组装.
- 引入formamidopyrimidine病变作为二核酸以防止异构化.
- 用胺酸来加入C-核酸相似物.
- 化温度 (T(M)) 确定DNA复制体.
- 使用皮佩里丁治疗的性可变性研究.
主要成果:
- 在正确配对时,formamidopyrimidine病变通常会降低十二角体的T(M).
- 与标准的dG-dA不匹配相比,具有Fapy.dG-dA不匹配的复数显示出明显更高的T(M).
- 与含有dA的复合物相比,含有Fapy.dA或其C-核酸相似物的复合物表现出较低的T(M).
- 使用 piperidine 治疗,Fapy.dA 很容易被检测为性无效的病变.
- 在测试条件下,Fapy.dG不太容易通过性可变性检测.
结论:
- 甲基胺酸病变和C核酸类型的存在和位置显著影响DNA复杂稳定性.
- Fapy.dA和Fapy.dG的性可变性差异表明可能需要不同的检测策略.
- 这些改性核酸是研究DNA损伤和修复机制的宝贵工具.
更多相关视频
11:49A Novel Saturation Mutagenesis Approach: Single Step Characterization of Regulatory Protein Binding Sites in RNA Using Phosphorothioates
Published on: August 21, 2018
09:20Identification of RNA Fragments Resulting from Enzymatic Degradation using MALDI-TOF Mass Spectrometry
Published on: April 11, 2022
相关概念视频
Nucleic acids
Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
Mutations
Overview
Nucleic Acids
Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
Mutations
Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Nucleic Acids and Nucleotides
Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and have instructions for its functioning. The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Deoxyribonucleic Acid (DNA)
DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and the organelles such as chloroplasts and mitochondria. In...
Deoxyribonucleic Acid (DNA)
DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and the organelles such as chloroplasts and mitochondria. In...
Antiviral Nucleoside Inhibitors
Antiviral Nucleoside InhibitorsAntiviral nucleoside inhibitors are structural analogs of natural nucleosides that interfere with viral DNA or RNA synthesis. These compounds selectively target viral polymerases due to their resemblance to host nucleosides, thereby disrupting viral genome replication.Mechanism of Acyclovir ActionAcyclovir is a guanosine analog with a three-carbon acyclic side chain. It selectively targets herpes simplex virus type 1 (HSV-1), herpes simplex virus type 2 (HSV-2),...
