Proteomics fingerprinting of phagosome maturation and evidence for the role of a Galpha during uptake
| Autor: | Thierry Soldati, Thomas Ruppert, Vincent Blancheteau, Mauro Delorenzi, Armin Bosserhoff, Daniel Gotthardt |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Phagosomes/metabolism
Proteomics GTP-Binding Protein alpha Subunits/physiology Phagocytosis Biology Biochemistry Models Biological Analytical Chemistry Animals Genetically Modified 03 medical and health sciences Heterotrimeric G protein Phagosomes Phagosome maturation Animals Cluster Analysis Dictyostelium Electrophoresis Gel Two-Dimensional Cytoskeleton Molecular Biology Cells Cultured 030304 developmental biology Phagosome Gel electrophoresis 0303 health sciences 030302 biochemistry & molecular biology GTP-Binding Protein beta Subunits biology.organism_classification GTP-Binding Protein alpha Subunits Cell biology ddc:540 GTP-Binding Protein beta Subunits/genetics Proteomics/methods |
| Zdroj: | Molecular and Cellular Proteomics, Vol. 5, No 12 (2006) pp. 2228-43 |
| ISSN: | 1535-9476 |
| Popis: | Phagocytosis, whether of food particles in protozoa or bacteria and cell remnants in the metazoan immune system, is a conserved process. The particles are taken up into phagosomes, which then undergo complex remodeling of their components, called maturation. By using two-dimensional gel electrophoresis and mass spectrometry combined with genomic data, we identified 179 phagosomal proteins in the amoeba Dictyostelium, including components of signal transduction, membrane traffic, and the cytoskeleton. By carrying out this proteomics analysis over the course of maturation, we obtained time profiles for 1,388 spots and thus generated a dynamic record of phagosomal protein composition. Clustering of the time profiles revealed five clusters and 24 functional groups that were mapped onto a flow chart of maturation. Two heterotrimeric G protein subunits, Galpha4 and Gbeta, appeared at the earliest times. We showed that mutations in the genes encoding these two proteins produce a phagocytic uptake defect in Dictyostelium. This analysis of phagosome protein dynamics provides a reference point for future genetic and functional investigations. |
| Databáze: | OpenAIRE |
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