ST: Signal Transduction
PB: Plant Biochemistry
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Role of Arabidopsis Jumonji-domain Proteins in the Regulation of Flowering Time
Ju Hee Jeong1, Hae Ryong Song1, Ji Yeon Hong1, Bosl Noh3, and Yoo Sun Noh1,2,*
1School of Biological Sciences, Seoul National University, Seoul 151-747, Korea.
2Plant Genomics and Breeding Institute, Seoul National University, Seoul 151-742, Korea.
3Research Institute of Basic Sciences, Seoul National University, Seoul 151-747, Korea.
Methylation is an important posttranslational modification of histone proteins that affectschromatin-based processes including transcriptional regulation, DNA repair, X-chromosome inactivation, and epigenetic inheritance. Until recently, histone methylation has been considered an irreversible modification, but the identification of histone demethylases has revealed that this modification can be dynamically regulated. So far, the majority of histone demethylases characterized have come from mammals and budding yeast. The lar but group of these histone demethylases shares the Jumonji (Jmj)s domain as their core catalytic domain. However, little has been known on the role of Jmj proteins in Arabidopsis. There are n genes encoding Jmj proteins in the Arabidopsis genome. Our previous studies have shown that two of these Jmj proteins, ELF6 and REF6, have distinctive roles in the regulation of floral transition through affecting the photoperiod- and FLC-dependent pathways, respectively. Here we report that another ArabidopsisJmj protein is involved in photoperiod-dependent floral regulation possibly through regulating the transcription of FT.
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