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Jumonji domain protein JMJD5 functions in both the plant and human circadian systems.

Jones, Matthew A and Covington, Michael F and DiTacchio, Luciano and Vollmers, Christopher and Panda, Satchidananda and Harmer, Stacey L (2010) 'Jumonji domain protein JMJD5 functions in both the plant and human circadian systems.' Proc Natl Acad Sci U S A, 107 (50). 21623 - 21628. ISSN 1091-6490

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Circadian clocks are near-ubiquitous molecular oscillators that coordinate biochemical, physiological, and behavioral processes with environmental cues, such as dawn and dusk. Circadian timing mechanisms are thought to have arisen multiple times throughout the evolution of eukaryotes but share a similar overall structure consisting of interlocking transcriptional and posttranslational feedback loops. Recent work in both plants and animals has also linked modification of histones to circadian clock function. Now, using data from published microarray experiments, we have identified a histone demethylase, jumonji domain containing 5 (JMJD5), as a previously undescribed participant in both the human and Arabidopsis circadian systems. Arabidopsis JMJD5 is coregulated with evening-phased clock components and positively affects expression of clock genes expressed at dawn. We found that both Arabidopsis jmjd5 mutant seedlings and mammalian cell cultures deficient for the human ortholog of this gene have similar fast-running circadian oscillations compared with WT. Remarkably, both the Arabidopsis and human JMJD5 orthologs retain sufficient commonality to rescue the circadian phenotype of the reciprocal system. Thus, JMJD5 plays an interchangeable role in the timing mechanisms of plants and animals despite their highly divergent evolutionary paths.

Item Type: Article
Uncontrolled Keywords: Arabidopsis, Arabidopsis Proteins, Biological Clocks, Cell Line, Circadian Rhythm, Gene Expression Regulation, Plant, Humans, Jumonji Domain-Containing Histone Demethylases, Phenotype, Photoperiod, Protein Isoforms, Seedlings, Transcription Factors
Subjects: Q Science > QH Natural history > QH301 Biology
Divisions: Faculty of Science and Health > Biological Sciences, School of
Depositing User: Jim Jamieson
Date Deposited: 12 Jan 2013 16:27
Last Modified: 28 Mar 2018 17:15

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