CRYPTOCHROME is a blue-light sensor that regulates neuronal firing rate.

CRYPTOCHROME is a blue-light sensor that regulates neuronal firing rate.
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DOI:
10.1126/science.1199702
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发表时间:
2011-03-18
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Holmes TC
Holmes TC
中科院分区:
其他
文献类型:
--
作者:
Fogle KJ;Parson KG;Dahm NA;Holmes TC

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Light-responsive neural activity in central brain neurons is generally conveyed through opsin-based signaling from external photoreceptors. Large lateral ventral arousal neurons (lLNvs) in Drosophila melanogaster increase action potential firing within seconds in response to light in the absence of all opsin-based photoreceptors. Light-evoked changes in membrane resting potential occur in about 100 milliseconds. The light response is selective for blue wavelengths corresponding to the spectral sensitivity of CRYPTOCHROME (CRY). cry-null lines are light-unresponsive, but restored CRY expression in the lLNv rescues responsiveness. Furthermore, expression of CRY in neurons that are normally unresponsive to light confers responsiveness. The CRY-mediated light response requires a flavin redox-based mechanism and depends on potassium channel conductance, but is independent of the classical circadian CRY-TIMELESS interaction.
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