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Published on: August 8, 2019
CACNA1D is a circadian gene and causes familial advanced sleep phase
John M Webb1,2,3, Fayal Abderemane-Ali4, Liza Ashbrook1
1Department of Neurology, University of California San Francisco, San Francisco, CA 94143.
Abstract:
Familial advanced sleep phase (FASP) is a heritable human sleep trait characterized by early sleep onset and offset times. We have identified five variants in five different families in the human voltage-gated calcium channel subunit alpha1 D (CACNA1D) that cosegregate with FASP. The variants in CACNA1D lead to altered channel dynamics in vitro. A mouse model of the E427K variant has a normal circadian period under constant darkness but displays altered phase shifts in response to light in the subjective night at circadian time (CT) 16 and CT22. Overall, these experiments establish CACNA1D as an FASP gene with altered entrainment, highlighting the ability of human genetics to uncover novel aspects of human circadian regulation.
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