The orphan nuclear receptor RORα regulates circadian transcription of the mammalian core-clock Bmal1

Apr 12, 2005Nature structural & molecular biology

The protein RORalpha controls daily rhythms of the core clock gene Bmal1 in mammals

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Abstract

Loss of RORalpha protein leads to dampened circadian rhythm of Bmal1 transcription.

  • BMAL1 is a key transcription factor involved in the circadian pacemaker in mammals.
  • RORalpha directly activates the transcription of Bmal1 through specific response elements.
  • RORalpha-deficient staggerer mice exhibit abnormal locomotor activity and unstable rhythmicity.
  • In cultured cells, reduced levels of RORalpha disrupt the normal circadian rhythm of Bmal1 transcription.
  • RORalpha is essential for the proper functioning of the cell-autonomous core circadian clock.

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