林/侧链C-H/O相互作用稳定了cis-林
Harrison C Oven1, Himal K Ganguly1, Neal J Zondlo1
1Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA. zondlo@udel.edu.
Physical chemistry chemical physics : PCCP
|February 2, 2026
概括
C-H/O 相互作用稳定了蛋白质中的 cis-proline 构造,特别是在 Glu-Pro 序列. 这些相互作用对于素和三素残留物也至关重要.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 计算化学计算化学
背景情况:
- cis-proline构成对蛋白质的结构和功能至关重要.
- 了解稳定cis-proline的因素对于蛋白质工程和药物设计至关重要.
研究的目的:
- 为了确定稳定 cis-proline 形状的局部蛋白质结构.
- 研究C-H/O相互作用在稳定cis-proline中的作用.
主要方法:
- 蛋白质数据库 (PDB) 结构的生物信息学分析.
- 密度函数理论 (DFT) 的计算.
主要成果:
- 在cis-proline构成中,在侧链氧和Pro C-Hα之间确定了C-H/O相互作用.
- 这些相互作用在Glu-Pro序列中最具稳定性,显示出高频率的cis-proline.
- DFT计算证实了C-H/O相互作用的稳定作用,特别是在Glu和Asp等离子残留物中.
- C-H/O相互作用还使cis-proline稳定在phosphoserine-proline和phosphothreonine-proline中,其dianonic形式的相互作用更强.
结论:
- C-H/O 相互作用是 cis-proline 构造的一个关键稳定因素.
- 这些发现解释了胺结合异构体在聚烯-氨酸和聚氨酸-氨酸序列中的较高激活屏障.
- 这些相互作用也可能稳定其他cis胺基键,突出显示它们的功能重要性.
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