Regulation of DWF12 in brassinosteroid signaling

DWF12 plays a negative role in BR signaling pathways. Like a GSK3b-like kinase in animal system, DWF12 is likely a constitutively active kinase that phosphorylate downstream targets including BZR1 and BES1. We like to understand how the activity of DWF12 is regulated in post-translation modification level.