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基于马莱胺的一步双重功能化蛋白N-Termini的蛋白质

Kengo Hanaya¹, Kazuaki Taguchi¹, Yuki Wada²

¹Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen., Minato-ku, Tokyo, 105-8512, Japan.

Angewandte Chemie (International ed. in English)

|November 20, 2024

概括

研究人员开发了一种使用maleimides和2-pyridinecarboxaldehyde (2-PCA) 衍生物进行蛋白质修饰的新方法. 这种N端蛋白修饰技术可以创建用于癌症治疗和成像应用的多种蛋白质合物.

科学领域:

生物结合化学生物结合化学
蛋白质工程是指蛋白质工程.
化学生物学化学生物学

背景情况:

马莱胺试剂被广泛用于通过氨酸残留物修饰蛋白质.
自然蛋白质中自由氨酸的有限可获得性需要替代的生物结合策略.
直接蛋白质修饰方法对于开发新疗法和诊断至关重要.

研究的目的:

开发一种使用maleimides进行N端蛋白修饰的新型非变异性方法.
为了使在温和的水性条件下将各种功能附着在蛋白质上.
为治疗和成像应用创造明确的蛋白质结合物.

主要方法:

利用了maleimides和2-pyridinecarboxaldehyde (2-PCA) 衍生物之间的铜(II) 中介 [3+2] 循环添加反应.
在无变性条件下 (pH 6, 37°C) 在水性介质中进行N端蛋白修饰.
在三元蛋白质复合体上演示了该方法,并设计了抗体trastuzumab.

主要成果:

成功实现了蛋白质的N端修饰,没有发生突变.
创建了一种双重修饰的trastuzumab联合体 (MMAE-Cy5-trastuzumab) 与一个细胞毒剂和一个.
修改后的trastuzumab保留了HER2结合,对HER2阳性细胞表现出细胞毒性,并使HER2阳性瘤的体内成像成为可能.

结论:

开发的方法为N端蛋白生物结合提供了一种简单而通用的方法.
这种技术扩大了用于创建具有精确结构的功能蛋白结合物的工具包.
这些发现对药物输送,诊断和基本生物学研究有重大影响.

关键词:

在N-终端.抗体 - 药物联合体铜铜铜铜的铜.男性的模拟物体.蛋白质修饰是一种蛋白质修饰.

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