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Updated: Jun 13, 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

第一个G-四重复体的胚胎景观与肌肉发育有关

Lijin Guo^1,2, Weiling Huang^1,3, Qi Wen¹

¹State Key Laboratory of Livestock and Poultry Breeding, & Lingnan Guangdong Laboratory of Agriculture, & Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding & Key Lab of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture and Rural Affair, South China Agricultural University, Guangzhou, 510642, China.

|September 10, 2024

概括

这项研究揭示了胚胎DNAG-四重复 (G4) 格局,显示了它们在肌体发生过程中的减少. 在NFATC2中的特定G4通过改变DNA甲基化和基因表达来调节肌肉发育.

科学领域:

基因组学就是基因组学.
表观遗传学在表观遗传学中,表观遗传学是指表观遗传学.
发展生物学发展生物学

背景情况:

DNA G四重复 (G4s) 是具有潜在治疗作用的非正规DNA结构.
G4s的发育功能,特别是在肌体发生过程中,在很大程度上是未知的.
胚胎髓质细胞作为研究胚胎G4动态的模型.

研究的目的:

为了绘制胚胎G4的景观.
研究G4s通过哪些机制影响胚胎肌发生的机制.
为了确定特定的G4s调节肌肉发育期间的基因转录.

主要方法:

G4切割和标记测序和RNA测序 (RNA-seq) 来识别G4s和差异表达基因 (DEGs).
全基因组二硫酸盐测序 (WGBS) 分析DNA甲基化动态.
生物信息集成G4,DEG和甲基化数据以构建监管网络.

主要成果:

在肌肉发育过程中,G4的丰度显著下降.
在G4稳定剂pyridostatin抑制胚胎肌发生.
确定了32个促进子相关的G4s调节基因转录,并构建了一个G4-DNA甲基化-DEG网络.
确认NFATC2促进体中的G4结构减少甲基化并增加NFATC2转录.

结论:

这项研究介绍了第一个胚胎基因组G4景观.
NFATC2 G4通过通过促进体DNA甲基化控制转录活性,在肌体发生过程中发挥关键的调节作用.

关键词:

通过DNA甲基化.胚胎时期是胚胎时期.在G4s的景观.肌肉发育 (Myogenesis) 是一种肌肉发育的过程.

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