人类核异生菌受体PXR:定向性乱交的结构性决定因素
R E Watkins1, G B Wisely, L B Moore
1Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina (UNC) at Chapel Hill, Chapel Hill, NC 27599, USA.
概括
人类孕妇X受体 (hPXR) 结构揭示了它如何结合药物,为预测和预防危险的药物相互作用提供了洞察力. 了解hPXR结合是更安全使用药物的关键.
科学领域:
- 生物化学 生物化学
- 药理学 药理学 是一个学科.
- 结构生物学 结构生物学
背景情况:
- 人类核孕妇X受体 (hPXR) 对药物代谢和相互作用至关重要.
- 异生菌对hPXR的激活会影响细胞染色体P450-3A的表达.
- 对hPXR的调节失调有助于药物相互作用的不良反应.
研究的目的:
- 阐明hPXR中联结的结构基础.
- 了解hPXR如何识别和响应异生菌.
- 为预测和减轻药物相互作用提供基础.
主要方法:
- 使用X射线晶体学来确定hPXR联体结合域的结构.
- 结构在它的apo形式和与SR12813.complex一起被解决.
- 获得了高分辨率 (2.5和2.75安格斯特罗姆) 的结构数据.
主要成果:
- 晶体结构揭示了hPXR.的结合体结合腔.
- 观察到药物SR12813在腔内以三种不同的方向结合.
- 在疏水性腔内,少量的极性残留物会影响连接体的结合和激活.
结论:
- 结构洞察力解释了hPXR如何检测到各种异生菌.
- 鉴定到的极性残留物对PXR的药理学激活特征至关重要.
- 这些发现有助于预测和避免药物相互作用.
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