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对N端残留突变的ZER1识别的分子洞察

Mingyao Tian¹, Wenbao Zhao¹, Xule Zhao¹

¹School of Mathematics & Physics, Hebei University of Engineering, Handan, China.

Journal of biomolecular structure & dynamics

|September 4, 2025

概括

ZER1通过N-降解途径识别,而N-终端甘氨酸对蛋白质降解至关重要. 像F2和L3这样的相邻残留物对结合亲和力和ZER1复合物的稳定性有显著的贡献.

科学领域:

生物化学
分子生物学
结构生物学

背景情况:

N-终端甘氨酸 (Gly/N-degron) 基因作为一种被E3无酸酶识别的降解信号.
通过Gly/ N-degron通路调解蛋白质降解.

研究的目的:

调查ZER1对N终端含有甘氨酸的的分子识别机制.
阐明N端和相邻残留物在ZER1复合物的稳定性和结合亲和力中的作用.

主要方法:

全原子分子动力学 (MD) 模拟.
有约束力的自由能量计算.
每个残留的能量分解和键分析.

主要成果:

范德瓦尔斯和静电相互作用是ZER1复合体稳定性的关键.
N端突变对结合亲和力有中等影响,但对ZER1的结构稳定性影响很小.
结合界面上的F2和L3残留物对结合的自由能量有显著的贡献,而F2和H4则对定至关重要.

结论:

N端残留物对识别和降解至关重要,相邻的残留物在结合中发挥主导作用.
提供对Gly/N-degron通路和ZER1功能的分子洞察.
提供了针对ZER1介导蛋白质降解的治疗方法的理论基础.

关键词:

酸/酸 MD模拟其他:N-终端一个ZER

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