Degradation of the tumor suppressor Smad4 by WW and HECT domain ubiquitin ligases

Morén A, Imamura T, Miyazono K, Heldin CH, Moustakas A.
J Biol Chem. 2005 Jun 10;280(23):22115-23. Epub 2005 Apr 6.
PMID:15817471 DOI:10.1074/jbc.M414027200