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Investigating the macropinocytic proteome of Dictyostelium amoebae by high‐resolution mass spectrometry
Author(s) -
Journet Agnès,
Klein Gérard,
Brugière Sabine,
Vandenbrouck Yves,
Chapel Agnès,
Kieffer Sylvie,
Bruley Christophe,
Masselon Christophe,
Aubry Laurence
Publication year - 2011
Publication title -
proteomics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.26
H-Index - 167
eISSN - 1615-9861
pISSN - 1615-9853
DOI - 10.1002/pmic.201100313
Subject(s) - pinocytosis , proteome , dictyostelium discoideum , proteomics , eukaryote , axenic , dictyostelium , biology , slime mold , microbiology and biotechnology , amoeba (genus) , biochemistry , chemistry , endocytosis , cell , bacteria , genome , genetics , gene
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.