人类组胺H1受体复合体与多克西平的结构
Tatsuro Shimamura1, Mitsunori Shiroishi, Simone Weyand
1Human Receptor Crystallography Project, ERATO, Japan Science and Technology Agency, Kyoto 606-8501, Japan.
Nature
|June 24, 2011
概括
与多克西平的组胺H(1) 受体 (H(1) R) 的晶体结构揭示了它在口袋中的深层结合. 这种结构洞察力解释了H(1) R抗剂在治疗过敏方面的选择性.
科学领域:
- 结构生物学 结构生物学
- 药理学 药理学 是一个学科.
- 药用化学 医学化学
背景情况:
- 组胺是过敏反应和炎症的关键调解剂.
- 组胺H1受体 (H1R) 抗剂对过敏症状的缓解至关重要.
- 了解H(1) R结构对于开发选择性对抗剂至关重要.
研究的目的:
- 为了确定H(1) R复合物的晶体结构,使用doxepin.
- 阐明H(1) R抗体选择性的分子基础.
- 为设计改进的H(1) R向药物提供见解.
主要方法:
- 进行X射线晶体学以获得H(1) R-doxepin复杂结构.
- 对第二代H(1) R抗剂进行分子对接模拟.
- 在氨基酶受体之间结合口袋特征的比较分析.
主要成果:
- 多克西平深深地结合在H(1) R连接体结合口袋中,与保存的残留物Trp428.8相互作用.
- 保存的疏水口袋解释了第一代对抗剂的选择性较低.
- 第二代抗剂利用一个独特的基组与Lys191和/或Lys179相互作用,在离子结合区域.
- 阴离子结合区域在氨基酶受体中是不同的,有助于H(1) R对手的选择性.
结论:
- 该研究揭示了H(1) R抗剂结合和选择性的结构基础.
- 阴离子结合区域的差异对于实现高特异性的H(1) R抗剂至关重要.
- 这些发现为合理设计新型,选择性H1R向治疗方法提供了分子基础.
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