Phosphorylation of the linker region of SMAD2 and SMAD3 by CDK8 or CDK9 creates a docking site for E3-ubiquitin ligase NEDD4L.
Massague, J, Chen, PY, Macias, MJ, Tempst, P, Goerner, N, Gao, S, Sapkota, G, Alarcon, C, Erdjument-Bromage, H, Rahman, S
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