Post-Translational Regulation of FLOWERING LOCUS T Protein in Arabidopsis

Dear Editor, Here, we report the developmental regulation of proteolytic cleavage of the FLOWERING LOCUS T （FT） protein. FT, a mem- ber of the phosphatidylethanolamine-binding protein （PEBP） family, functions as a florigen or a component of florigen. PEBP binds phosphoethanolamine, and its ligand-binding domain is evolutionarily conserved from bacteria to plants and animals （Schoentgen and Jolles, 1995; Bradley et al., 1996）. PEBPs regulate important signaling pathways to control growth and differentiation （Chautard et al., 2004）. Some animal PEBP homologs undergo post-translational regulation. For example,