人类TWIK-2通道的结构及其通过皮莫齐德的抑制
Nandish K Khanra1, Chongyuan Wang1, Bryce D Delgado1,2
1Structural Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065.
概括
通道TWIK-2,对于炎症酶激活至关重要,其结构由冷EM揭示. 药物皮莫齐德直接抑制TWIK-2,提供一种潜在的抗炎治疗策略.
科学领域:
- 结构生物学是结构生物学.
- 分子药理学分子药理学
- 免疫学 免疫学 免疫学
背景情况:
- 通道TWIK-2 (与Twik相关的中间通道2) 对于巨细胞中ATP诱导的NLRP3炎症体的激活至关重要.
- 作为双孔域 (K2P) 通道超级家族的成员,TWIK-2是炎症性疾病的新兴治疗标.
- 对于TWIK-2存在有限的药理工具,阻碍了抗炎药物的开发.
研究的目的:
- 为了确定人体TWIK-2的冷电子显微镜 (cryo-EM) 结构.
- 研究pimozide在TWIK-2上的抑制机制.
- 为开发新型TWIK-2抑制剂提供结构基础.
主要方法:
- 电子显微镜 (cryo-EM) 用于结构的确定.
- 用于功能测试的重建通道系统.
- 皮莫齐德抑制试验.
主要成果:
- 人类TWIK-2的冷-EM结构揭示了Tyr111在选择性过器和跨膜化中的乙烯链中的异常构造.
- 皮莫齐德被证明通过结合在选择性过器下方,直接抑制TWIK-2,从而取代乙烯链.
- TWIK-2-pimozide复合物的结构表明潜在的药物通过侧面膜扩散进入.
结论:
- 确定TWIK-2的结构为其架构和功能提供了关键的见解.
- 皮莫齐德直接抑制TWIK-2,使其成为潜在的抗炎治疗标.
- 这些发现为设计针对炎症状况的特定TWIK-2抑制剂奠定了基础.
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