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3D 基因组学可视化低氧诱导的N端半氨酸的上调,使用 de novo 基生成

Yunjung Choi¹, Joo-Yeong Jeon², Jeongin Hwang¹

¹Department of Chemistry, Seoul National University, Seoul, 08826, South Korea.

|March 7, 2025

概括

我们开发了一种新色光染色方法 (DNFC) 来可视化细胞和组织中的N-Cys蛋白质. 这种技术增强了缺氧检测,并揭示了对蛋白质调节和红细胞组成的新见解.

科学领域:

生物化学生物化学
细胞生物学细胞生物学
分子成像学分子成像学

背景情况:

N-Cys残留物是参与蛋白调节的关键翻译后修改.
现有的N-Cys检测方法在范围和应用上是有限的.
了解N-Cys蛋白质动态对于各种生物过程至关重要,包括细胞信号传递和疾病机制.

研究的目的:

为N-Cys蛋白质开发一种新,特定和敏感的光染色策略.
研究这种方法对监测蛋白质加工和细胞对低氧反应的有用性.
探索3D遗传病理学在复杂生物样本中分析N-Cys蛋白分布的潜力.

主要方法:

开发一种针对N-Cys残留物的新型DNFC (氨酸氨酸氨酸) 光染色策略.
将DNFC染料应用于生物样本,包括细胞,动物组织和人类临床样本.
将DNFC染色与用于3D成像的组织清除技术集成在一起.
利用免疫测试和质谱测试来识别标蛋白质.

主要成果:

在各种生物环境中实现强光,有效可视化N-Cys蛋白质.
在低氧条件下显示DNFC光增强,表明N-Cys蛋白质存在增加.
鉴定了2类actin作为低氧反应蛋白,并使用3D遗传病理学突出了其空间分布.
在红细胞 (RBC) 中发现了RGS5蛋白的新型和显著存在.

结论:

DNFC染色策略为N-蛋白质组的成像和定量分析提供了一个强大的工具.
DNFC染色对于监测蛋白质加工,特别是Arg/N-degron通路非常有效.
该方法能够对N-Cys蛋白进行详细的3D成像,并为低氧相关研究中的3D遗传病理学奠定了基础.
在红细胞中发现RGS5为血液学和细胞生物学研究开辟了新的途径.

关键词:

在3D成像中使用3D成像.在Arg/N-degron路径中.组织病理学组织病理学低氧相关的疾病诊断.在N端的囊蛋白中.组织成像成像技术

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