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Mismatch Repair

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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Updated: Jul 17, 2025

Single-molecule Manipulation of G-quadruplexes by Magnetic Tweezers

Single-molecule Manipulation of G-quadruplexes by Magnetic Tweezers

Published on: September 19, 2017

通过neomycin进行并行G-quadruplex识别.

Nihar Ranjan¹, Dev P Arya¹

¹Laboratory of Medicinal Chemistry, Department of Chemistry, Clemson University, Clemson, SC, United States.

Frontiers in chemistry

|September 6, 2023

概括

此摘要是机器生成的。

尼奥米是一种氨基糖化物,强烈地与平行G-四重复DNA结构结合. 这一发现扩大了已知的氨基甘油酸的结合部位,并可以为新的向G-quadruplex药物的设计提供信息.

关键词:

在G-quadruplex中使用.在ITC中,ITC是ITC.氨基甘油化物氨基甘油化物这是一种neomycin.认可是一种认可.

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Last Updated: Jul 17, 2025

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科学领域:

生物化学生化学
分子生物学分子生物学
药物发现药物发现药物发现

背景情况:

G四复合体是具有多种生物作用的核酸结构.
准G-四复合体是药物开发的一个有前途的战略.
氨基糖化物是抗生素的一类,具有潜在的治疗应用.

研究的目的:

为了研究氨基甘油酸的结合,特别是neomycin,平行G-四重复结构.
描述neomycin-G-quadruplex相互作用的结合亲和力和机制.
为了比较neomycin与paromomycin对G-quadruplexes的结合情况.

主要方法:

用热量计和光谱研究来分析结合.
循环二重化 (CD) 光谱法用于评估结构变化.
用菌素和菌素进行了比较的结合试验.

主要成果:

氨酸表现出高亲和度结合 (K_a ~ 10⁵-10⁸ M^-1) 与平行G-四复合体.
结合亲和力受到G-四重复合物组成,盐度和pH的影响.
尼奥米辛的结合在中性pH下是静电驱动的,并且不会改变G-四倍体构造.
与neomycin相比,paromomycin表现出明显较弱的结合作用.

结论:

平行G四重复体代表了像neomycin.com这样的aminoglycosides的高亲和度结合点.
这些发现有助于更好地理解氨基糖化物相互作用,并为新型G-四重复合物向剂的设计提供信息.
这项研究为开发基于aminoglycoside-G-quadruplex相互作用的新疗法开辟了道路.