Abstract
Interaction between the alteration/deficiency in activation-2b (ADA2b) and histone H3/switch-3B (SWI3B) proteins was evaluated in arabidopsis mesophyll protoplasts by quantitative fluorescence resonance energy transfer (FRET) analysis. Microscopic image showed that ADA2b, SWI3B and H3 proteins colocalized in nucleus, and quantitative FRET measurements showed 0.31 of FRET efficiency (E) for the protoplasts coexpressing ECFP-ADA2b and EYFP-SWI3B, and 0.285 of E for the protoplasts coexpressing ECFP-H3 and EYFP-ADA2b, demonstrating the direct interaction of ADA2b with SWI3B/H3 protein. Collectively, SWI3B and H3 proteins are the inherent components of the ADA2b complex in which ADA2b directly interacts with SWI3B/H3 protein.
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