Full text is available at the source.
FBXL21 Regulates Oscillation of the Circadian Clock through Ubiquitination and Stabilization of Cryptochromes
FBXL21 controls daily body clock rhythms by tagging and stabilizing key clock proteins
AI simplified
Abstract
FBXL21 stabilizes CRY proteins and counteracts the degradation mediated by FBXL3.
- FBXL21 and FBXL3 have opposing effects on the regulation of CRY1 and CRY2 proteins, which are crucial for the circadian clock.
- Fbxl21(-/-) mice show normal daily activity patterns but with disorganized behaviors, indicating that FBXL21 plays a role in activity regulation.
- Fbxl3(-/-) mice exhibit an extremely long-period phenotype, which is mitigated in double-knockout mice lacking both FBXL3 and FBXL21.
- The double knockout leads to destabilization of behavioral rhythms and, in some cases, arrhythmicity.
- FBXL21's cytosolic presence contrasts with the nuclear localization of FBXL3, suggesting different functional roles in circadian rhythm regulation.
AI simplified