一个TRPV家族的离子通道对于Drosophila的听力是必需的
Janghwan Kim1, Yun Doo Chung, Dae-Young Park
1Department of Genetics, Hanwha Chemical Co. R&D Center, Sinsung-Dong, Yusung-Gu, Daejeon 305-345, Korea.
Nature
|June 24, 2003
概括
纳 (Nan) 蛋白被认为是Drosophila.听力必不可少的离子通道. 这一发现揭示了律器官中机械传导的分子基础,这对于昆虫的听觉系统至关重要.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 感官生物学 感官生物学
背景情况:
- 昆虫的听觉系统依赖于协和器官来检测声音.
- 听觉转导在律性器官中的分子机制在很大程度上是未知的.
- 以前的研究排除了NOMPC作为这些器官中主要的听觉传感器.
研究的目的:
- 为了确定负责听觉转导的离子通道在Drosophila和弦器官的分子身份.
- 描述南 (南) 蛋白的功能和局部.
主要方法:
- 利用Drosophila的遗传查来识别参与机械转导的新型离子通道.
- 在培养细胞和体内进行电生理学记录,以评估离子通道活性.
- 进行免疫细胞化学,以确定南春蛋白的表达模式和亚细胞局部.
主要成果:
- 确定了南 (Nan) 蛋白,TRP超级家族离子通道子单元,作为听觉系统的关键组成部分.
- 证明NAN在培养细胞中中介流和阴离体电流,以应对透应激.
- 表明,Nan仅在协性神经元中表达,并局部化到感觉毛.
- 观察到Drosophila突变体缺乏Nan. 在声音唤起潜力的完全缺席.
结论:
- 南 (Nan) 蛋白质是Drosophila的管性器官中传导听觉转导的必不可少的离子通道.
- 作为听觉系统中主要的机械传感器,对听觉至关重要.
- 这一发现为昆虫听觉的分子基础提供了关键的见解.
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Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several types of...
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