Inhibition of caveolar uptake, SV40 infection, and beta1-integrin signaling by a nonnatural glycosphingolipid stereoisomer.
Authors:Singh RD, Holicky EL, Cheng ZJ, Kim SY, Wheatley CL, Marks DL, Bittman R, Pagano RE
Journal:J Cell Biol
PubMed ID:17371832
'Caveolar endocytosis is an important mechanism for the uptake of certain pathogens and toxins and also plays a role in the internalization of some plasma membrane (PM) lipids and proteins. However, the regulation of caveolar endocytosis is not well understood. We previously demonstrated that caveolar endocytosis and beta1-integrin signaling are ... More
The long and the short cycle. Alternative intracellular routes for trafficking of G-protein-coupled receptors.
Authors:Innamorati G, Le Gouill C, Balamotis M, Birnbaumer M
Journal:J Biol Chem
PubMed ID:11150299
'The C terminus of the human V2 vasopressin receptor contains multiple phosphorylation sites including a cluster of amino acids that when phosphorylated prevents the return of the internalized receptor to the cell surface. To identify the step where the recycling process was interrupted, the trafficking of the V2 receptor was ... More
Transfer of M2 muscarinic acetylcholine receptors to clathrin-derived early endosomes following clathrin-independent endocytosis.
Authors:Delaney KA, Murph MM, Brown LM, Radhakrishna H
Journal:J Biol Chem
PubMed ID:12093817
'Upon agonist stimulation, many G protein-coupled receptors such as beta(2)-adrenergic receptors are internalized via beta-arrestin- and clathrin-dependent mechanisms, whereas others, like M(2) muscarinic acetylcholine receptors (mAChRs), are internalized by clathrin- and arrestin-independent mechanisms. To gain further insight into the mechanisms that regulate M(2) mAChR endocytosis, we investigated the post-endocytic trafficking ... More
Identification and characterization of small molecules that inhibit intracellular toxin transport.
Authors:Saenz JB, Doggett TA, Haslam DB
Journal:Infect Immun
PubMed ID:17576758
'Shiga toxin (Stx), cholera toxin (Ctx), and the plant toxin ricin are among several toxins that reach their intracellular destinations via a complex route. Following endocytosis, these toxins travel in a retrograde direction through the endosomal system to the trans-Golgi network, Golgi apparatus, and endoplasmic reticulum (ER). There the toxins ... More
A burst of auxilin recruitment determines the onset of clathrin-coated vesicle uncoating.
Authors:Massol RH, Boll W, Griffin AM, Kirchhausen T
Journal:Proc Natl Acad Sci U S A
PubMed ID:16798879
'Clathrin-coated pits assemble on a membrane and pinch off as coated vesicles. The released vesicles then rapidly lose their clathrin coats in a process mediated by the ATPase Hsc70, recruited by auxilin, a J-domain-containing cofactor. How is the uncoating process regulated? We find that during coat assembly small and variable ... More