De novo设计了具有受控拓和稳定性的3螺旋捆和蛋白质
Xiyue Leng1, Katherine I Albanese1,2,3, Lia R Golub1
1School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK D.N.Woolfson@bristol.ac.uk.
Chemical science
|September 19, 2025
概括
我们结合了理性和计算方法来设计稳定的三螺旋束 (3HB) 组件和单链蛋白质. 这种方法精确地控制了蛋白质拓和热稳定性.
科学领域:
- 蛋白质工程是指蛋白质工程.
- 计算生物学 计算生物学
- 结构生物学 结构生物学
背景情况:
- 计算式蛋白质设计方法需要改进,以提高成功率和设计精确度.
- 控制蛋白质拓和热稳定性对于先进的蛋白质工程至关重要.
研究的目的:
- 开发一种综合的理性和计算设计策略,用于创建三螺旋束 (3HB) 组件和单链蛋白质.
- 为了实现对设计的蛋白质结构的拓和热稳定性的精确控制.
主要方法:
- 从蛋白质数据库中的反平行3HB获得了序列与结构的关系,以建立核心包装规则.
- 设计了用于酸性,基本性和中性螺旋的互补序列,使用核心包装规则和表面电荷模式.
- 利用AlphaFold2模型指导单链蛋白质的计算设计,通过连接螺旋与循环.
- 合成基因,在大肠杆菌*中表达蛋白质,并使用化学和热变性来表征它们的稳定性.
主要成果:
- 成功生成了稳定的,异构三元的3HB组合,具有针对性的"上下向上"拓.
- 产生可溶性,单体和热稳定的单链蛋白质,具有受控的螺旋-螺旋相互作用.
- 通过改变内部极层来调节蛋白质的热稳定性的能力,而不会影响相互作用的特异性.
- 实现了与高度稳定的天然蛋白质可比的热力学参数,由与设计模型和预测相匹配的X射线晶体结构证实.
结论:
- 综合的理性和计算设计方法有效地产生3HB组件和单链蛋白质,具有可预测的拓和可调节的热稳定性.
- 这一策略通过使复杂,稳定的蛋白质架构的创建,推进了计算式蛋白质设计.
- 结构预测和实验验证的高精度凸显了将计算建模与实验性表征相结合的力量.
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