摘要
背景:已知蛋白质序列的数量迅速增加,需要更有效的方法来预测蛋白质的三维(3D)结构,从而为合理的药物设计提供基础知识。了解蛋白质的折叠机制对于预测蛋白质的3D结构以及设计具有新功能和医学应用的蛋白质非常有价值。 Levinthal的悖论是,尽管即使对于100个残基的蛋白质也无法完全采样到天文数字的构象数量,但自然界中的蛋白质通常会在几微秒到几小时的时间范围内折叠成天然状态。这些矛盾的结果表明,有机物中存在可以协助蛋白质折叠的因素。 方法:在本文中,我们选择了一个拥挤的细胞状环境和温度,并选择了前三个翻译后修饰(PTM)作为示例,以表明 Levinthal的悖论不能反映蛋白质的折叠机制。然后,我们揭示了这些因素对蛋白质折叠的影响。 结果:本综述总结的结果表明,拥挤的细胞状环境,温度和前三个PTM重塑了蛋白质的自由能态(FEL),从而调节了折叠过程。熵和焓之间的平衡是了解拥挤的细胞样环境和PTM对蛋白质折叠的影响的关键。另外,蛋白质的稳定性/柔韧性受温度调节。 结论:本文得出结论,细胞环境可以直接干预蛋白质折叠。细胞环境与序列进化的长期相互作用可以使蛋白质有效折叠。因此,为了正确理解蛋白质的折叠机制,应考虑细胞环境对蛋白质折叠的影响。
关键词: 蛋白质折叠,自由能景观,拥挤的细胞状环境,环境温度,磷酸化,糖基化和乙酰化。
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