title: Recruitment of coat proteins to peptidoliposomes.
abstract: Intracellular transport between compartments within the cell is generally mediated by membrane vesicles. Their formation is initiated by activation of small GTPases that then recruit cytosolic proteins to the membrane surface to form a coat, interact with cargo proteins, and deform the lipid bilayer. Liposomes proved to be a useful tool to study the molecular mechanisms of these processes in vitro. To analyze the involvement of membrane proteins, the cytosolically exposed sequences may be coupled chemically to reactive lipids in the membrane. Here we describe the use of such peptidoliposomes presenting lipid-coupled cytosolic tails of cargo proteins for the in vitro analysis of the membrane recruitment of AP-1 adaptors in the process of forming AP-1/clathrin coats. AP-1 recruitment is mediated by the GTPase Arf1, requires specific lipids, and cargo signals. Interaction with cargo induces AP-1 oligomerization already in the absence of clathrin.
authors.affiliation: Biozentrum, University of Basel, Basel, Switzerland.
authors.forename: Gregor
authors.initials: G
authors.lastname: Suri
authors.forename: Martin
authors.initials: M
authors.lastname: Spiess
authors.forename: Pascal
authors.initials: P
authors.lastname: Crottet
mesh_terms: D020823:ADP-Ribosylation Factor 1 / Q000378:metabolism; D033961:Adaptor Protein Complex 1 / Q000378:metabolism; D000818:Animals; D001681:Biological Assay; D036022:Capsid Proteins / Q000378:metabolism*; D002417:Cattle; D022163:Clathrin-Coated Vesicles / Q000378:metabolism; D003600:Cytosol / Q000378:metabolism; D008081:Liposomes / Q000378:metabolism*; D008967:Molecular Biology / Q000379:methods*; D010455:Peptides / Q000378:metabolism*; D011499:Protein Processing, Post-Translational; D021381:Protein Transport
chemical_list: D033961:Adaptor Protein Complex 1; D036022:Capsid Proteins; D008081:Liposomes; D010455:Peptides; D020823:ADP-Ribosylation Factor 1