The nuclear R-SMAD:Co-SMAD complex recruits ubiquitin conjugating enzymes, such as UBE2D1 and UBE2D3, that ubiquitinate the complex and eventually lead to its proteasomal degradation. This provides an end point to the signaling pathway.
ten Dijke, P, Heldin, CH
Wang, T, Farley, J, Lin, Y, Gruendler, C
ubiquitin-protein transferase activity of Nuclear ubiquitin ligase [nucleoplasm]
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