Differential post-translational modification of CD63 molecules during maturation of human dendritic cells

Engering, A. and Kuhn, L. and Fluitsma, D. and Hoefsmit, E. and Pieters, J.. (2003) Differential post-translational modification of CD63 molecules during maturation of human dendritic cells. European Journal of Biochemistry, 270 (11). pp. 2412-2420.

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The capacity of dendritic cells to initiate T cell responses is related to their ability to redistribute MHC class II molecules from the intracellular MHC class II compartments to the cell surface. This redistribution occurs during dendritic cell development as they are converted from an antigen capturing, immature dendritic cell into an MHC class II-peptide presenting mature dendritic cell. During this maturation, antigen uptake and processing are down-regulated and peptide-loaded class II complexes become expressed in a stable manner on the cell surface. Here we report that the tetraspanin CD63, that associates with intracellularly localized MHC class II molecules in immature dendritic cells, was modified post-translationally by poly N-acetyl lactosamine addition during maturation. This modification of CD63 was accompanied by a change in morphology of MHC class II compartments from typical multivesicular organelles to structures containing densely packed lipid moieties. Post-translational modification of CD63 may be involved in the functional and morphological changes of MHC class II compartments that occur during dendritic cell maturation.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Infection Biology > Biochemistry (Pieters)
UniBasel Contributors:Pieters, Jean
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:05 Oct 2017 05:50
Deposited On:22 Mar 2012 13:22

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