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Title: Raft localisation of FcgammaRIIa and efficient signaling are dependent on palmitoylation of cysteine 208.
Authors: Barnes, Nadine C;Powell, Maree S;Trist, Halina M;Gavin, A L;Wines, B D;Hogarth, P Mark
Affiliation: Helen Macpherson Smith Trust Inflammatory Disease Laboratory, The Austin Research Institute, Austin Health, Studley Road, Heidelberg, Vic. 3084, Australia.
Issue Date: 5-Dec-2005
Citation: Immunology Letters 2005; 104(1-2): 118-23
Abstract: Ligand-dependent aggregation of FcgammaRIIa initiates multiple biochemical processes including the translocation to detergent resistant membrane domains (DRMs) and receptor tyrosine phosphorylation. Palmitoylation of cysteine residues is considered to be one process that assists in the localisation of proteins to DRMs. Within the juxtamembrane region of FcgammaRIIa there is cysteine residue (C208) that we show to be palmitoylated. Mutation of this cysteine residue results in the disruption of FcgammaRIIa translocation to DRMs as empirically defined by insolubility at high Triton X-100 concentrations. This study also demonstrates that the lack of lipid raft association diminishes FcgammaRIIa signaling as measured by receptor phosphorylation and calcium mobilisation functions suggesting that FcgammaRIIa signaling is partially dependent on lipid rafts.
Internal ID Number: 16375976
DOI: 10.1016/j.imlet.2005.11.007
Type: Journal Article
Subjects: Animals
Antigens, CD.analysis.genetics.metabolism
Calcium Signaling
Cell Line, Tumor
Membrane Microdomains.chemistry.drug effects.metabolism
Protein Processing, Post-Translational.drug effects
Receptors, IgG.analysis.genetics.metabolism
Appears in Collections:Journal articles

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