title: Investigating the macropinocytic proteome of Dictyostelium amoebae by high-resolution mass spectrometry.
abstract: The cellular slime mold Dictyostelium discoideum is a soil-living eukaryote, which feeds on microorganisms engulfed by phagocytosis. Axenic laboratory strains have been produced that are able to use liquid growth medium internalized by macropinocytosis as the source of food. To better define the macropinocytosis process, we established the inventory of proteins associated with this pathway using mass spectrometry-based proteomics. Using a magnetic purification procedure and high-performance LC-MS/MS proteome analysis, a list of 2108 non-redundant proteins was established, of which 24% featured membrane-spanning domains. Bioinformatics analyses indicated that the most abundant proteins were linked to signaling, vesicular trafficking and the cytoskeleton. The present repertoire validates our purification method and paves the way for a future proteomics approach to study the dynamics of macropinocytosis.
authors: CEA, IRTSV, Laboratoire Biologie à Grande Echelle, Grenoble, France.
authors: Agnès
authors: A
authors: Journet
authors: Gérard
authors: G
authors: Klein
authors: Sabine
authors: S
authors: Brugière
authors: Yves
authors: Y
authors: Vandenbrouck
authors: Agnès
authors: A
authors: Chapel
authors: Sylvie
authors: S
authors: Kieffer
authors: Christophe
authors: C
authors: Bruley
authors: Christophe
authors: C
authors: Masselon
authors: Laurence
authors: L
authors: Aubry
mesh_terms: D015153:Blotting, Western; D002853:Chromatography, Liquid / Q000379:methods; D019295:Computational Biology; D004023:Dictyostelium / Q000378:metabolism*; D004591:Electrophoresis, Polyacrylamide Gel; D008247:Lysosomes / Q000378:metabolism; D059346:Magnets; D013058:Mass Spectrometry / Q000379:methods*; D010873:Pinocytosis; D021381:Protein Transport; D020543:Proteome / Q000032:analysis* / Q000302:isolation & purification / Q000378:metabolism; D040901:Proteomics / Q000379:methods*; D015800:Protozoan Proteins / Q000032:analysis / Q000378:metabolism
chemical_list: D020543:Proteome; D015800:Protozoan Proteins