Hypophosphorylation of the architectural chromatin protein DEK in death-receptor-induced apoptosis revealed by the isotope coded protein label proteomic platform
Hypophosphorylation of the architectural chromatin protein DEK in death-receptor-induced apoptosis revealed by the isotope coded protein label proteomic platform
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2006
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Tabbert, Anja
Kappes, Ferdinand
Kellermann, Josef
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PROTEOMICS ; 6 (2006), 21. - pp. 5758-5772. - ISSN 1615-9853. - eISSN 1615-9861
Abstract
During apoptosis nuclear morphology changes dramatically due to alterations of chromatin architecture and cleavage of structural nuclear proteins. To characterize early events in apoptotic nuclear dismantling we have performed a proteomic study of apoptotic nuclei. To this end we have combined a cell-free apoptosis system with a proteomic platform based on the differential isotopic labeling of primary amines with N-nicotinoyloxy-succinimide. We exploited the ability of this system to produce nuclei arrested at different stages of apoptosis to analyze proteome alterations which occur prior to or at a low level of caspase activation. We show that the majority of proteins affected at the onset of apoptosis are involved in chromatin architecture and RNA metabolism. Among them is DEK, an architectural chromatin protein which is linked to autoimmune disorders. The proteomic analysis points to the occurrence of multiple PTMs in early apoptotic nuclei. This is confirmed by showing that the level of phosphorylation of DEK is decreased following apoptosis induction. These results suggest the unexpected existence of an early crosstalk between cytoplasm and nucleus during apoptosis. They further establish a previously unrecognized link between DEK and cell death, which will prove useful in the elucidation of the physiological function of this protein.
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570 Biosciences, Biology
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Caspase,hnRNP,Isotope coded protein label,Oncoprotein,Post-translational modification
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TABBERT, Anja, Ferdinand KAPPES, Rolf KNIPPERS, Josef KELLERMANN, Friedrich LOTTSPEICH, Elisa FERRANDO-MAY, 2006. Hypophosphorylation of the architectural chromatin protein DEK in death-receptor-induced apoptosis revealed by the isotope coded protein label proteomic platform. In: PROTEOMICS. 6(21), pp. 5758-5772. ISSN 1615-9853. eISSN 1615-9861. Available under: doi: 10.1002/pmic.200600197BibTex
@article{Tabbert2006-11Hypop-18242, year={2006}, doi={10.1002/pmic.200600197}, title={Hypophosphorylation of the architectural chromatin protein DEK in death-receptor-induced apoptosis revealed by the isotope coded protein label proteomic platform}, number={21}, volume={6}, issn={1615-9853}, journal={PROTEOMICS}, pages={5758--5772}, author={Tabbert, Anja and Kappes, Ferdinand and Knippers, Rolf and Kellermann, Josef and Lottspeich, Friedrich and Ferrando-May, Elisa} }
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