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通过使用酸盐过氧化酶近距离生物化识别核膜附近的基因组DNA序列

Yixian Zheng¹, Katherine A Bossone^1,2, Sara Debic^1,2

¹Carnegie Institution for Science, Baltimore, MD, USA.

Methods in molecular biology (Clifton, N.J.)

|August 20, 2025

概括

这项研究引入了一种使用工程APEX2酶融合来识别核膜附近的DNA的强大方法. 该协议有效地映射固定或活细胞中的膜相关域 (LAD).

科学领域:

生物化学
分子生物学
基因组学

背景情况:

工程性酸盐过氧化酶 (APEX2) 促进生物分子的靠近依赖生物化.
将APEX2定位到特定的亚细胞位置,例如通过Lamin B1融合的核层,使局部标记成为可能.
之前识别DNA接近核结构的方法是有限的.

研究的目的:

开发和详细说明使用APEX2-Lamin B1融合识别核膜附近的DNA的协议.
通过基于近距离的生物化来表征膜相关领域 (LAD).
建立适用于活细胞和甲固定细胞的可靠方法.

主要方法:

一个APEX2-Lamin B1融合蛋白的构造.
与核膜附近的生物基DNA和蛋白质的近距离结合反应.
用于下游分析的生物化分子的斯特雷普塔维丁珠沉.
在活细胞和甲固定细胞中应用该协议.

主要成果:

在各种细胞状态中,APEX2近距离结合反应被证明是强大的和有效的.
通过APEX-Lamin B1融合成功地在核膜附近识别了DNA.
该协议使膜相关域 (LAD) 的表征成为可能.

结论:

APEX2-Lamin B1融合蛋白为研究核外围的DNA组织提供了强大的工具.
该协议提供了一种多功能方法,用于在特定的亚细胞区内绘制DNA-蛋白和DNA-DNA相互作用.
该技术可用于识别与LAD等核结构相关的基因组区域.

关键词:

美国阿斯科巴特过氧化酶其他类型与拉米纳相关的领域核膜近距离绑定

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