工程 GFP-NanoLuc 聚变基质用于通过 BRET 灵敏,定量检测蛋白酶活动
Mitsuki Nakamura1, Masafumi Sakono1
1Department of Applied Chemistry, Faculty of Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-855, Japan.
Analytical biochemistry
|January 19, 2026
概括
研究人员开发了一种新的,基因编码的生物发光共振能量转移 (BRET) 基质,用于检测蛋白酶活性. 这种具有成本效益的系统消除了对合成基质的需求,使生物样品中的实时蛋白酶测量成为可能.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 生物技术是生物技术.
背景情况:
- 蛋白酶在生物过程和疾病中至关重要,使其成为诊断和治疗的关键目标.
- 目前的蛋白酶测定通常使用昂贵的合成基质,限制其可访问性和增加成本.
研究的目的:
- 开发一种基因编码的,基于生物发光共振能量转移 (BRET) 的蛋白酶基质.
- 创建一个具有成本效益和广泛适用的平台,用于实时测量蛋白酶活动.
主要方法:
- 使用NanoLuc (NLuc) 和绿色光蛋白 (GFP) 通过可切割的序列融合构建了一个基于BRET的基底.
- 优化了基质与甘氨酸-氨酸链接剂,以提高蛋白质分解性可访问性.
- 使用烟草蚀刻病毒 (TEV) 蛋白酶和caspase-3验证了系统.
主要成果:
- 完整的BRET基板发出绿色光;蛋白质分解裂变破坏了BRET,减少了绿色光.
- 实现了TEV蛋白酶的定量检测,其极限为0.0426μM.
- 证明了对caspase-3的敏感检测,其极限为0.62 nM.
结论:
- 开发的转基因编码的BRET基质为合成基质提供了具有成本效益的替代品.
- 这个平台可以通过使用标准表达系统 (如大肠杆菌) 来进行敏感的实时蛋白酶活性测量.
- 为蛋白酶研究,诊断和治疗开发提供了一种多功能工具.
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