PMID:11402161

Citation	Liu, XL, Covington, MF, Fankhauser, C, Chory, J and Wagner, DR (2001) ELF3 encodes a circadian clock-regulated nuclear protein that functions in an Arabidopsis PHYB signal transduction pathway. Plant Cell 13:1293-304
Abstract	Many aspects of plant development are regulated by photoreceptor function and the circadian clock. Loss-of-function mutations in the Arabidopsis EARLY FLOWERING 3 (ELF3) and PHYTOCHROME B (PHYB) genes cause early flowering and influence the activity of circadian clock-regulated processes. We demonstrate here that the relative abundance of the ELF3 protein, which is a novel nucleus-localized protein, displays circadian regulation that follows the pattern of circadian accumulation of ELF3 transcript. Furthermore, the ELF3 protein interacts with PHYB in the yeast two-hybrid assay and in vitro. Genetic analyses show that ELF3 requires PHYB function in early morphogenesis but not for the regulation of flowering time. This suggests that ELF3 is a component of a PHYB signaling complex that controls early events in plant development but that ELF3 and PHYB control flowering via independent signal transduction pathways.
Links	PubMed PMC135570
Keywords	Amino Acid Sequence; Arabidopsis/genetics; Arabidopsis/growth & development; Arabidopsis/radiation effects; Arabidopsis Proteins; Circadian Rhythm/genetics; Cloning, Molecular; Genes, Plant; Light; Molecular Sequence Data; Nuclear Proteins/genetics; Nuclear Proteins/physiology; Photoreceptor Cells; Phytochrome/physiology; Phytochrome B; Plant Proteins/genetics; Plant Proteins/physiology; Protein Binding; Signal Transduction/physiology; Signal Transduction/radiation effects; Transcription Factors/genetics; Transcription Factors/physiology
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