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TIMELESS mutation alters phase responsiveness and causes advanced sleep phase
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TIMELESS mutation alters phase responsiveness and causes advanced sleep phase
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Journal Article
TIMELESS mutation alters phase responsiveness and causes advanced sleep phase
2019
Overview
Many components of the circadian molecular clock are conserved from flies to mammals; however, the role of mammalian Timeless remains ambiguous. Here, we report a mutation in the human TIMELESS (hTIM) gene that causes familial advanced sleep phase (FASP). Tim CRISPR mutant mice exhibit FASP with altered photic entrainment but normal circadian period. We demonstrate that the mutation prevents TIM accumulation in the nucleus and has altered affinity for CRY2, leading to destabilization of PER/CRY complex and a shortened period in nonmature mouse embryonic fibroblasts (MEFs). We conclude that TIM, when excluded from the nucleus, can destabilize the negative regulators of the circadian clock, alter light entrainment, and cause FASP.
Publisher
National Academy of Sciences
