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Single-Strand DNA Binding Proteins

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...

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Updated: Oct 25, 2025

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

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

Published on: April 4, 2025

识别G-四重复-破坏DNA的小分子

Jérémie Mitteaux¹, Pauline Lejault¹, Filip Wojciechowski²

¹Institut de Chimie Moléculaire, ICMUB CNRS UMR 6302, UBFC, 21078 Dijon, France.

Journal of the American Chemical Society

|August 4, 2021

概括

研究人员开发了新的体外测试方法,以寻找破坏G-四重复 DNA (G4) 的分子. 这项研究确定了一种类型的甲基素 (PhpC) 作为潜在的神经生物学应用的有希望的G4破坏剂.

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Single-molecule Manipulation of G-quadruplexes by Magnetic Tweezers

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Published on: September 19, 2017

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科学领域:

生物化学
化学生物学
分子生物学

背景情况:

G四重复基因 (G4) 研究的重点是结合和稳定G4结构的配体.
在神经生物学的应用中需要破坏G4的分子,特别是与G4过度代表相关的疾病.

研究的目的:

开发可靠的体外测试以识别破坏G4结构的小分子.
描述一种新的G4破坏分子.

主要方法:

开发了一种新的G4展开试验,从G4酶试验中改编出来.
使用生物物理 (CD,UV-vis) 和生物化学 (PAGE,FRET化) 技术.
调整了一个qPCR停止测定用于G4不稳定性分析.

主要成果:

建立了G4破坏稳定性测试开发的多方面工作流程.
鉴定出一种基于酸 (PhpC) 的G模拟物作为G4破坏分子.
通过补充体外评估验证了PhpC模拟的特性.

结论:

开发的测试提供了一种可靠的方法来识别G4不稳定剂.
基于PhpC的G模拟器作为G4破坏小分子的原型.
这项研究为开发化学生物学工具在疾病背景下准G4开辟了道路.