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Authored: Orlic-Milacic, M, 2012-04-04,
Edited: Jassal, B, 2012-04-10,
Reviewed: Huang, Tao, 2012-05-14,
Ubiquitinated SMAD2 undergoes proteasome-dependent degradation. Therefore, SMURF2 decreases the level of SMAD2 in the cell, irrespective of TGF-beta signaling, and may regulate the competence of a cell to respond to TGF-beta signaling (Zhang et al. 2001). These findings are contradicted by a recent study of Smurf2 knockout mice, where Smad2 protein levels were found to be unaltered in the absence of Smurf2 (Tang et al. 2011).
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Degradation of ubiquitinated SMAD2
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