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通过计算蛋白质工程改进分裂HaloTag

Jonas Wilhelm¹, Lennart Nickel¹, Yin-Hsi Lin¹

¹Department of Chemical Biology, Max Planck Institute for Medical Research, Heidelberg, Germany.

Protein science : a publication of the Protein Society

|April 18, 2025

概括

研究人员改进了用于记录细胞事件的分裂HaloTag系统. 工程蛋白质碎片提高了标记速度和灵敏度,使细胞中的分子记录更快,更准确.

科学领域:

分子生物学分子生物学
生物化学生物化学
细胞成像细胞成像

背景情况:

分裂HaloTag技术可以记录短暂的分子相互作用作为永久的细胞标记.
目前的局限性包括标签速度缓慢,限制分拆HaloTag记录器的应用.

研究的目的:

为了改进cpHalo∆的改进版本,cpHalo∆是分裂HaloTag系统的较大片段,以增强标签动力学.
为了增加cpHalo∆片段的热稳定性和活性,用于更广泛的应用.

主要方法:

运用计算技术来识别cpHalo∆中的稳定点突变.
一个结构化的链接器被设计为连接圆形变异蛋白的N和C末端.
设计的cpHalo∆变体的特点是热稳定性和标记活性.

主要成果:

与野生类型相比,工程cpHalo∆表现出明显改善的热稳定性和活性.
修改后的系统需要更低的基质度和更短的标签时间.
在基于HaloTag的分割测定中观察到增强的动态范围和灵敏度.

结论:

工程设计的cpHalo∆片段代表了分裂HaloTag技术的重大进展.
这种改进有助于更快,更灵敏地记录细胞中短暂的分子事件.
改进后的系统扩大了分HaloTag记录器在各种生物研究领域的实用性.

关键词:

普洛斯斯 (Prossus) 是一个有趣的植物.罗塞塔 (Rosetta) 是一个分裂-HaloTag可以使用.循环变换的循环变换是一种循环变换.光是一种光.分子记录器分子记录器蛋白质设计蛋白质设计蛋白质工程工程蛋白质工程蛋白质标签的标签是蛋白质的标签

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