用于卡瓦克罗尔激活OTOP1质子通道的门元件
Jingmei Hu1,2, Yalan Han1, Anna Luo1
1Engineering Laboratory of Peptides of Chinese Academy of Sciences, Key Laboratory of Bioactive Peptides of Yunnan Province, KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, National Resource Center for Non-Human Primates, National Research Facility for Phenotypic & Genetic Analysis of Model Animals (Primate Facility), Key Laboratory of Genetic Evolution & Animal Models, Sino-African Joint Research Center, and New Cornerstone Science Laboratory, Kunming Institute of Zoology, the Chinese Academy of Sciences, Kunming, Yunnan, China.
卡瓦克罗尔激活了Otopetrin 1 (OTOP1) 通道,这对于酸味的感知至关重要. 跨膜段3和TM5-6链接器中的特定残留物是这种激活的关键,提供了潜在的药物设计目标.
科学领域:
- 离子通道生理学 离子通道生理学
- 分子生物学分子生物学
- 感官神经科学是一种神经科学.
背景情况:
- 奥托佩林1 (OTOP1) 是一种由质子激活的通道,对于动物的酸味感知至关重要.
- OTOP1的精确封锁机制在很大程度上仍然没有被描述.
- 了解OTOP1关门对于阐明味道机制和潜在的治疗干预至关重要.
研究的目的:
- 为了研究Otopetrin 1 (OTOP1) 通道的封闭机制.
- 为了确定调节OTOP1活动的化合物.
- 探索特定分子激活OTOP1的结构基础.
主要方法:
- 鼠标OTOP1 (mOTOP1) 和相关通道在细胞中的功能表达.
- 检测pH光度以测量通道活动.
- 现场指导的突变发生和嵌合体实验,以探测结构功能关系.
主要成果:
- 在中性和酸性条件下,Carvacrol被确定为mOTOP1的新型激活剂.
- 卡瓦克罗尔的激活功效在较低的pH值下降.
- 跨膜段3 (TM3) 中的Serine 134 (S134) 和TM5-6链接器中的Threonine 247 (T247) 的突变取消了卡瓦克罗尔的激活,同时赋予了相关通道的激活.
- 其他OTOP1类型 (mOTOP2,mOTOP3) 和相关物种的OTOP1 (CmOTOP1) 在中性pH下对卡瓦克罗尔不敏感.
结论:
- 卡尔瓦克罗尔可以选择性地激活小鼠的OTOP1,突出显示其作为药理学工具的潜力.
- 在TM3和TM5-6链接器中的特定残留物 (S134和T247) 是卡瓦克罗尔敏感性和OTOP1关门的关键决定因素.
- 这些地区代表了OTOP1道门装置的关键结构元素,也是药物开发的潜在目标.
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