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热下的CRD_SAT:平衡计算设计的标签变体的稳定性,亲和力和功能实用性

Esteban Guiot¹, Marie-Eve Chagot², Alexis Boutilliat¹

¹SATT SAYENS, Maison Régionale de l'Innovation, 64a Rue Sully, 21000 Dijon, France.

|July 3, 2025

概括

研究人员设计了高温稳定的CRD-VL标签,以实现经济高效的蛋白质净化. 这些标签提高了热稳定性和结合亲和力,简化了重组蛋白质的生产,并使新的净化应用成为可能.

科学领域:

生物技术是生物技术.
蛋白质工程是指蛋白质工程.
生物化学生物化学

背景情况:

具有成本效益和高效的重组蛋白质生产对于工业应用至关重要.
之前开发的CRD_SAT标签提供了高效,具有成本效益的净化与最小的硬质障碍.
需要增强的蛋白质净化标签,提高工业过程的稳定性.

研究的目的:

设计和设计CRD_SAT标签的高度热稳定版本.
评估这些热稳定变体 (CRD_VLs) 在蛋白质净化中的性能.
评估突变对酶活性和结合亲和力的影响.

主要方法:

使用蛋白序列优化来提高CRD_SAT标签的热稳定性.
创建了变体 (CRD_VLs),并确定了它们的中点变质温度.
将CRD_VLs与PET酶化,并评估其在热处理后的活性和稳定性.

主要成果:

CRD_VLs的中点变质温度从55.8°C增加到92.2°C.
在热净化步骤后,CRD_VL标记的酶保留了活性,显示出增强的稳定性.
CRD_VLs对d-乳糖表现出更好的亲和力,与CRD_SAT的90μM相比,分离常数 (K_d) 约为30μM.

结论:

工程CRD_VLs提供卓越的热稳定性,通过热处理有效净化重组蛋白质.
提高CRD_VLs的稳定性和增强亲和力,促进了成本效益高的蛋白质净化.
CRD_VL标签在基于乳素的亲和度丰富和简化净化策略中显示出应用的希望.

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