title: A pit stop at the ER.
abstract: Although ligand activation of receptor signaling is well understood, less is known about how a cell switches off signaling by the activated receptor. In his Perspective, Gill discusses new work (Haj et al.) that visualizes one step in the process of deactivating a ligand-activated receptor tyrosine kinase--the dephosphorylation of the internalized receptor by a phosphatase in the endoplasmic reticulum.
authors.affiliation: University of California, San Diego, La Jolla, CA 92093-0650, USA. ggill@ucsd.edu
authors.forename: Gordon N
authors.initials: GN
authors.lastname: Gill
mesh_terms: D000818:Animals; D002462:Cell Membrane / Q000201:enzymology; D004705:Endocytosis; D004721:Endoplasmic Reticulum / Q000201:enzymology*; D011992:Endosomes / Q000201:enzymology / Q000378:metabolism; D004735:Energy Transfer; D066246:ErbB Receptors / Q000737:chemistry / Q000378:metabolism*; D005453:Fluorescence; D008024:Ligands; D008247:Lysosomes / Q000378:metabolism; D051379:Mice; D019869:Phosphatidylinositol 3-Kinases / Q000378:metabolism; D010766:Phosphorylation; D021381:Protein Transport; D054562:Protein Tyrosine Phosphatase, Non-Receptor Type 1; D017027:Protein Tyrosine Phosphatases / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D011518:Proto-Oncogene Proteins / Q000378:metabolism; D050721:Proto-Oncogene Proteins c-cbl; D020794:Receptor Protein-Tyrosine Kinases / Q000737:chemistry / Q000378:metabolism*; D017479:Receptors, Platelet-Derived Growth Factor / Q000737:chemistry / Q000378:metabolism*; D025801:Ubiquitin / Q000378:metabolism; D044767:Ubiquitin-Protein Ligases
chemical_list: D008024:Ligands; D011518:Proto-Oncogene Proteins; D025801:Ubiquitin; D050721:Proto-Oncogene Proteins c-cbl; D044767:Ubiquitin-Protein Ligases; D019869:Phosphatidylinositol 3-Kinases; D066246:ErbB Receptors; D020794:Receptor Protein-Tyrosine Kinases; D017479:Receptors, Platelet-Derived Growth Factor; D054562:Protein Tyrosine Phosphatase, Non-Receptor Type 1; D017027:Protein Tyrosine Phosphatases; C516609:Ptpn1 protein, mouse; C493849:Cbl protein, mouse