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一个光探针用于在活细胞中选择性检测 lysosomal β-hexosaminidase

Jongwon Lee¹, Jihyeon Boo¹, Young-Hyun Kim¹

¹Department of Chemistry, Yonsei University, Seoul, 03722, Republic of Korea.

|January 27, 2024

概括

开发了一种新的光探针,βGalNAc-Rhod-CM(NEt2),用于检测细胞中的 lysosomal β-hexosaminidase 活性. 这种敏感的探针可以准确测量酶水平和细胞透.

科学领域:

生物化学生化学
细胞生物学细胞生物学
酶学是一种酶学.

背景情况:

溶解体β-hexosaminidase活性对于理解各种病理生理学事件至关重要.
需要准确的方法来量化β-hexosaminidase在细胞环境中的活性.

研究的目的:

设计和描述一种新的光探针,用于敏感检测 lysosomal β-hexosaminidase.
评估探头在评估酶活性和细胞透性的实用性.

主要方法:

合成了βGalNAc-Rhod-CM(NEt2) 的光探针.
酶动力学研究以确定探头的灵敏度和特异性.
基于细胞的测试以测量β-hexosaminidase活性和探测细胞透.

主要成果:

该探头,βGalNAc-Rhod-CM(NEt2),专门检测β-hexosaminidase,其检测极限低 (0.52nM).
它具有很高的催化效率 (kcat = 17 s−1,Km = 22 μM) 并不会与O-GlcNAcase发生反应.
细胞研究证实了探针测量酶活性和评估细胞通透性的能力.

结论:

开发的光探针为量化细胞中的 lysosomal β-hexosaminidase活性提供了一个敏感和特定的工具.
这种探测器有助于进行细胞研究,包括在不同的条件下评估酶活性,例如不同的葡萄糖度.

关键词:

库马林是一种素.光探测器探测器可以发光.活细胞成像活细胞成像罗道尔·罗多尔 (Rhodol Rhodol) 是一个古老的这是一种β-hexosaminidase.

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