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首页> 外文期刊>Neuron >The claudin superfamily protein nsy-4 biases lateral signaling to generate left-right asymmetry in C. elegans olfactory neurons.
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The claudin superfamily protein nsy-4 biases lateral signaling to generate left-right asymmetry in C. elegans olfactory neurons.

机译:claudin超家族蛋白nsy-4在秀丽隐杆线虫嗅觉神经元中偏向横向信号以产生左右不对称性。

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摘要

Early in C. elegans development, signaling between bilaterally symmetric AWC olfactory neurons causes them to express different odorant receptor genes. AWC left-right asymmetry is stochastic: in each animal, either the left or the right neuron randomly becomes AWC(ON), and the other neuron becomes AWC(OFF). Here we show that the nsy-4 gene coordinates the lateral signaling that diversifies AWC(ON) and AWC(OFF) neurons. nsy-4 mutants generate 2 AWC(OFF) neurons, as expected if communication between the AWC neurons is lost, whereas overexpression of nsy-4 results in 2 AWC(ON) neurons. nsy-4 encodes a transmembrane protein related to the gamma subunits of voltage-activated calcium channels and the claudin superfamily; it interacts genetically with calcium channels and antagonizes a calcium-to-MAP kinase cascade in the neuron that becomes AWC(ON). Genetic mosaic analysis indicates that nsy-4 functions both cell-autonomously and nonautonomously in signaling between AWC neurons, providing evidence for lateral signaling and feedback that coordinate asymmetric receptor choice.
机译:在秀丽隐杆线虫发育的早期,双侧对称AWC嗅觉神经元之间的信号传导使它们表达不同的气味受体基因。 AWC左右不对称是随机的:在每只动物中,左或右神经元随机变为AWC(ON),而另一个神经元变为AWC(OFF)。在这里,我们显示nsy-4基因协调了使AWC(ON)和AWC(OFF)神经元多样化的横向信号。 nsy-4突变体会产生2个AWC(OFF)神经元,如果AWC神经元之间的通讯丢失,则可以预期,而nsy-4的过表达导致2个AWC(ON)神经元。 nsy-4编码一种跨膜蛋白,该蛋白与电压激活的钙通道和claudin超家族的γ亚基有关;它与钙通道发生遗传相互作用,拮抗神经元中的钙-MAP激酶级联反应,从而变成AWC(ON)。遗传镶嵌分析表明,nsy-4在AWC神经元之间的信号传导中既具有细胞自治功能,也具有非自治功能,为协调非对称受体选择的横向信号传递和反馈提供了证据。

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