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抗癌临床化合物对人类γ-分泌酶抑制的结构基础

Xuefei Guo¹, Haotian Li¹, Xiaoli Lu^2,3,4

¹Beijing Frontier Research Center for Biological Structure, Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China.

Nature structural & molecular biology

|December 9, 2024

概括

研究人员绘制了与五种玛分泌酶抑制剂 (GSI) 结合的人类γ-分泌酶的结构. 这些结构揭示了GSI如何与酶相互作用,为开发更强效的抗癌药物提供了见解.

科学领域:

生物化学生物化学
结构生物学结构生物学
药理学药理学是指药理学的学科.

背景情况:

异常的Notch信号传递,涉及Notch细胞内域 (NICD),与各种癌症有关.
NICD释放由γ-分泌酶活性介导,使得γ-分泌酶抑制剂 (GSI) 成为一个有前途的抗癌策略.

研究的目的:

确定人类γ-分泌酶的高分辨率冷电子显微镜结构,并与五个临床评估的GSI复合.
阐明在γ-分泌酶复合体内GSI活性的结合相互作用和结构基础.

主要方法:

使用冷电子显微镜 (cryo-EM) 来获得与RO4929097,crenigacestat,BMS906024,nirogacestat和MK-0752.752结合的人类γ-分泌酶的结构.
在GSI-γ-secretase复合体上进行了高分辨率结构分析 (2.43.0 Å).

主要成果:

结构显示,所有五个GSI都与g-分泌酶复合体内的Presenilin 1的基质结合部位结合.
对于每个GSI,观察到不同的绑定模式,表明了特定的识别差异.
绑定的GSI影响绑定口袋的形状,影响其尺寸和形状.

结论:

确定的结构为GSI抑制γ-分泌酶提供了详细的分子洞察力.
了解这些结构特征和结合模式可以指导具有增强抗癌功能的新型GSI的合理设计.

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