title: Circadian expression profiles of chromatin remodeling factor genes in Arabidopsis.
abstract: The circadian clock is a biological time keeper mechanism that regulates biological rhythms to a period of approximately 24 h. The circadian clock enables organisms to anticipate environmental cycles and coordinates internal cellular physiology with external environmental cues. In plants, correct matching of the clock with the environment confers fitness advantages to plant survival and reproduction. Therefore, circadian clock components are regulated at multiple layers to fine-tune the circadian oscillation. Epigenetic regulation provides an additional layer of circadian control. However, little is known about which chromatin remodeling factors are responsible for circadian control. In this work, we analyzed circadian expression of 109 chromatin remodeling factor genes and identified 17 genes that display circadian oscillation. In addition, we also found that a candidate interacts with a core clock component, supporting that clock activity is regulated in part by chromatin modification. As an initial attempt to elucidate the relationship between chromatin modification and circadian oscillation, we identified novel regulatory candidates that provide a platform for future investigations of chromatin regulation of the circadian clock.
authors.affiliation: Department of Bioactive Material Sciences and Research Center of Bioactive Materials, Chonbuk National University, Jeonju, 561-756, Korea.
authors.forename: Hong Gil
authors.initials: HG
authors.lastname: Lee
authors.forename: Kyounghee
authors.initials: K
authors.lastname: Lee
authors.forename: Kiyoung
authors.initials: K
authors.lastname: Jang
authors.forename: Pil Joon
authors.initials: PJ
authors.lastname: Seo
mesh_terms: D000107:Acetylation; D017360:Arabidopsis / Q000235:genetics* / Q000502:physiology; D029681:Arabidopsis Proteins / Q000235:genetics* / Q000378:metabolism; D042002:Chromatin Assembly and Disassembly / Q000235:genetics*; D057906:Circadian Clocks; D002940:Circadian Rhythm / Q000235:genetics*; D019175:DNA Methylation; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant; D006657:Histones / Q000378:metabolism; D011485:Protein Binding
chemical_list: D029681:Arabidopsis Proteins; D006657:Histones