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Protein-protein Interfaces

Protein-protein Interfaces

Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...

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Updated: Jul 2, 2025

Method for Identifying Small Molecule Inhibitors of the Protein-protein Interaction Between HCN1 and TRIP8b

Method for Identifying Small Molecule Inhibitors of the Protein-protein Interaction Between HCN1 and TRIP8b

Published on: November 11, 2016

针对 hSSB1-INTS3 接口:以计算选驱动的方法来识别潜在的调节器.

Tabassum Khair Barbhuiya^1,2, Sam Beard^2,3, Esha T Shah^2,3

¹Centre for Genomics and Personalised Health, and School of Chemistry and Physics, Faculty of Science, Queensland University of Technology, 2 George Street, Brisbane, QLD 4000, Australia.

|February 26, 2024

概括

研究人员发现了新型化合物,这些化合物破坏了人类单链DNA结合蛋白1 (hSSB1) 和INTS3.3之间的相互作用. 这一发现提供了一种新的策略,通过抑制DNA修复途径来向癌症.

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Last Updated: Jul 2, 2025

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Published on: November 11, 2016

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科学领域:

分子生物学分子生物学
结构生物学结构生物学
癌症研究癌症研究

背景情况:

人类单链DNA结合蛋白1 (hSSB1) 对于DNA修复至关重要,它与INTS3和C9ORF80.1一起形成SOSS1复合体.
在癌症中hSSB1活性升高表明其作为抗癌治疗点的潜力.
以前的抑制策略集中在hSSB1的DNA结合域上,但取得的成功有限.

研究的目的:

通过在SOSS1复合体内破坏其与INTS3的相互作用来研究hSSB1功能的抑制.
为了确定可以阻碍INTS3-hSSB1蛋白质与蛋白质相互作用 (PPI) 的药物类化合物.

主要方法:

在hSSB1结合界面对INTS3蛋白进行化合物库的分子对接选.
在实验室中使用共免疫沉试验评估PPI破坏.
通过免疫光试验和染色体招募研究评估细胞效应.
分子动力学模拟以评估INTS3热点地点的连接体结合稳定性.

主要成果:

三种化合物在实验室中显示了INTS3-hSSB1相互作用的潜在破坏.
一种化合物显著影响了DNA损伤后hSSB1和INTS3对染色质的招募.
这项研究介绍了首个针对INTS3-hSSB1相互作用的类似药物的化合物.

结论:

破坏INTS3-hSSB1相互作用代表了癌症治疗的新疗法策略.
这些已识别的化合物为进一步的生物物理研究和PPI抑制剂开发提供了基础.
在DNA修复途径中准蛋白质-蛋白质相互作用为抗癌药物发现提供了有前途的途径.