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26 April 2024 |
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A transcription factor response element for gene expression during circadian night | | Hiroki R Ueda
; Wenbin Chen
; Akihito Adachi
; Hisanori Wakamatsu
; Satoko Hayashi
; Tomohiro Takasugi
; Mamoru Nagano
; Ken-ichi Nakahama
; Yutaka Suzuki
; Sumio Sugano
; Masamitsu Iino
; Yasufumi Shigeyoshi
; Seiichi Hashimoto
; | | Date: |
1 Aug 2002 | | Journal: | Nature, 418 (6897), 534-9 | | Abstract: | Mammalian circadian clocks consist of complex integrated feedback loops that cannot be elucidated without comprehensive measurement of system dynamics and determination of network structures. To dissect such a complicated system, we took a systems-biological approach based on genomic, molecular and cell biological techniques. We profiled suprachiasmatic nuclei and liver genome-wide expression patterns under light/dark cycles and constant darkness. We determined transcription start sites of human orthologues for newly identified cycling genes and then performed bioinformatical searches for relationships between time-of-day specific expression and transcription factor response elements around transcription start sites. Here we demonstrate the role of the Rev-ErbA/ROR response element in gene expression during circadian night, which is in phase with Bmal1 and in antiphase to Per2 oscillations. This role was verified using an in vitro validation system, in which cultured fibroblasts transiently transfected with clock-controlled reporter vectors exhibited robust circadian bioluminescence. | | Source: | PubMed, pmid12152080 doi: 10.1038/nature00906 | | Services: | Forum | Review | Favorites | |
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