ALK1 regulates the internalization of endoglin and the type III TGF-β receptor

Abstract
The relation between complex formation among TGF-β receptors and their endocytosis remained unclear. We show that the complexes formed regulate their endocytosis and signaling, with a major effect by ALK1. Our results link TGF-β receptor oligomerization and endocytosis based on which endocytosis signals are functional in specific receptor complexes.