起源于早期真核生物的NALCN/Cch1通道亚单元
Adriano Senatore1,2, Tatiana D Mayorova1, Luis A Yañez-Guerra3,4
1Department of Biology, University of Toronto Mississauga, Mississauga, Canada.
The Journal of general physiology
|September 5, 2025
概括
泄漏通道NALCN及其子单元在真核生物中有古老的起源,而不仅仅是动物. 这项研究揭示了这些关键神经元调节者的意想不到的多样性和进化历史.
科学领域:
- 离子通道生物学
- 进化基因组学
- 分子神经科学
背景情况:
- 泄漏通道NALCN调节神经元的刺激能力.
- NALCN与辅助子单位:FAM155,UNC79和UNC80一起工作.
- NALCN与真菌通道Cch1有着共同的进化联系,但UNC79/UNC80被认为是动物特有的.
研究的目的:
- 使用扩展的真核基因数据重新检查NALCN和Cch1通道子单元的进化起源.
- 在非动物真核生物中调查FAM155,UNC79和UNC80同类的存在.
主要方法:
- 来自多种真核生物的扩展基因序列数据的遗传学分析.
- 对NALCN/Cch1通道子单位同类物的比较分析.
- 与已知的人类NALCN复合结构相比,结构预测分析.
主要成果:
- 证实了NALCN和Cch1之间的直接基因关系,确定了一个更大的相关通道类.
- 在藻类中确定了FAM155/Mid1同类物质,在真菌和其他微生物真核生物中确定了UNC79/UNC80同类物质.
- 在大多数动物谱系中发现NALCN子单元 (除了ctenophores),并支持跨metazoan/non-metazoan同类的正统关系.
结论:
- NALCN/Cch1通道的亚单元具有古老的真核起源和意想不到的多样性.
- 动物以外的UNC79/UNC80同类物质的存在挑战了以前的理解.
- 需要进一步研究以了解这种通道复合体在广泛的真核生物环境中的功能作用.
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