甲胺N-甲基转移酶的细胞有效过渡状态类似物
Niusha Mahmoodi1, Yacoba V T Minnow1, Rajesh K Harijan1
1Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461, United States.
Biochemistry
|July 19, 2023
概括
开发了一种新型的第二代过渡状态类型抑制剂,该类型的抑制剂是甲胺N-甲基转移酶 (PNMT). 这种强效和选择性抑制剂在治疗与上腺素水平相关的疾病方面表现有前途.
科学领域:
- 生物化学 生物化学
- 酶抑制可以抑制酶.
- 药用化学 医学化学
背景情况:
- 甲胺N-甲基转移酶 (PNMT) 催化了上腺素的合成,这是血压和神经系统疾病的关键调节剂.
- 过渡状态 (TS) 类似物是强大的酶抑制剂,之前的工作产生了人类PNMT (hPNMT) 的第一代抑制剂.
研究的目的:
- 设计,合成和描述PNMT的第二代TS模拟抑制剂.
- 评估抑制剂的结合机制,细胞活性,特异性和PNMT活性部位内的结构相互作用.
主要方法:
- 第二代TS模拟抑制剂 (抑制剂4) 的合成和表征.
- 异热定位热度计 (ITC) 用于确定结合动力学和热力学.
- 基于细胞的测定使用表达PNMT的HEK293T细胞来评估细胞内活性 (IC50).
- 在hPNMT活性部位内对抑制剂4的结构分析.
主要成果:
- 合成了一种强大的PNMT抑制剂 (4),K值为1.2nM.
- 抑制剂4表现出负的合作结合,由驱动.
- 基于细胞的测试揭示了一个具有81nM的IC50的细胞透性抑制剂.
- 结构数据证实,抑制剂4有效地占据PNMT活性部位,模仿基质相互作用.
- 抑制剂4对PNMT比其他甲基转移酶和α2-上腺受体具有较高的特异性.
结论:
- 第二代TS模拟抑制剂4代表了PNMT向药物设计的重大进步.
- 抑制剂4的强大活性,细胞透性和高特异性表明PNMT相关疾病的治疗潜力.
- 与早期的抑制剂相比,进一步的结构洞察证实了PNMT活性部位内的优化相互作用.
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