An electromagnetic field disrupts negative geotaxis in Drosophila via a CRY-dependent pathway.

An electromagnetic field disrupts negative geotaxis in Drosophila via a CRY-dependent pathway.
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电磁场通过哭泣的依赖性途径破坏了果蝇中的负岩石。

DOI:
10.1038/ncomms5391
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发表时间:
2014-07-14
影响因子:
16.6
通讯作者:
Kyriacou, Charalambos P.
Kyriacou, Charalambos P.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Fedele, Giorgio;Green, Edward W.;Rosato, Ezio;Kyriacou, Charalambos P.

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许多高等动物已经进化出利用地球磁场的能力,特别是定向。黑腹果蝇也对电磁场(EMF)有反应,尽管报道的影响相当温和。在这里,我们报告说,负趋地性苍蝇,得分为攀登,是由一个静态的EMF中断,这是由隐花色素(CRY),蓝光昼夜光感受器介导的。果蝇可以通过形成自由基电子对来感知EMF,这需要结合在Trp残基三联体附近的黄素腺嘌呤二核苷酸(FAD)的光活化,但是三联体中末端Trp的突变维持了攀爬中的EMF响应性。相反,CRY C末端的缺失破坏了EMF反应,表明它起着重要的信号传导作用。CRY表达在一个子集的时钟神经元,或光感受器,或天线,足以介导负趋地性和EMF敏感性。因此,攀爬为研究果蝇的EMF反应提供了一个强大而可靠的表型。 地球的电磁场对果蝇的行为有一定的影响。在这里,Fedele等人使用攀爬行为的评估来描述蓝光昼夜光感受器隐花色素如何介导苍蝇对重力的负面运动反应。
Many higher animals have evolved the ability to use the Earth’s magnetic field, particularly for orientation. Drosophila melanogaster also respond to electromagnetic fields (EMFs), although the reported effects are quite modest. Here we report that negative geotaxis in flies, scored as climbing, is disrupted by a static EMF, and this is mediated by cryptochrome (CRY), the blue-light circadian photoreceptor. CRYs may sense EMFs via formation of radical pairs of electrons requiring photoactivation of flavin adenine dinucleotide (FAD) bound near a triad of Trp residues, but mutation of the terminal Trp in the triad maintains EMF responsiveness in climbing. In contrast, deletion of the CRY C terminus disrupts EMF responses, indicating that it plays an important signalling role. CRY expression in a subset of clock neurons, or the photoreceptors, or the antennae, is sufficient to mediate negative geotaxis and EMF sensitivity. Climbing therefore provides a robust and reliable phenotype for studying EMF responses in Drosophila. The earth’s electromagnetic field has a modest effect on the behaviour of Drosophila melanogaster. Here, Fedele et al. use an assessment of climbing behaviour to describe how the blue-light circadian photoreceptor cryptochrome mediates a negative movement response to gravity in flies.
DOI: 10.1098/rsif.2013.0638
发表时间: 2013-11-06
期刊: Journal of the Royal Society, Interface
影响因子: --
作者:
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发表时间: 2013-03-29
影响因子: 4.8
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DOI: 10.1038/ncomms1364
发表时间: 2011-06-21
影响因子: 16.6
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