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Activation of the Cell Death Program by Nitric Oxide Involves Inhibition of the Proteasome

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1999

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Glockzin, Sandra
von Knethen, Andreas
Brüne, Bernhard

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The Journal of Biological Chemistry : JBC. 1999, 274(28), pp. 19581-19586. ISSN 0021-9258. eISSN 1083-351X. Available under: doi: 10.1074/jbc.274.28.19581

Zusammenfassung

The ubiquitin/proteasome pathway mediates the degradation of many short-lived proteins that are critically involved in the regulation of cell proliferation and cell death, including the tumor suppressor protein p53. Accumulation of p53 and induction of apoptosis in RAW 264.7 macrophages in response to nitric oxide are well established. However, the molecular mechanisms involved in nitric oxide-induced p53 accumulation are unknown. Here we show that, similar to nitric oxide, treatment of macrophages with specific proteasome inhibitors, including clastolactacystin-β-lactone, induces p53 accumulation and apoptosis, suggesting that nitric oxide may affect the activity of the proteasome. In support of this hypothesis, both exposure of cells toS-nitrosoglutathione and stimulation of endogenous nitric oxide production by lipopolysaccharide/interferon-γ treatment result in inhibition of proteasome activity as measured in vitroby the degradation of the proteasome-specific substrate succinyl-Leu-Leu-Val-Tyr-4-methylcoumarin-7-amide. Moreover, chemically diverse nitric oxide donors interfere with proteasome-mediated degradation of polyubiquitinated p53 in vitro. These data imply that nitric oxide-induced apoptosis and accumulation of p53 are, at least in part, mediated by inhibition of the proteasome.

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570 Biowissenschaften, Biologie

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ISO 690GLOCKZIN, Sandra, Andreas VON KNETHEN, Martin SCHEFFNER, Bernhard BRÜNE, 1999. Activation of the Cell Death Program by Nitric Oxide Involves Inhibition of the Proteasome. In: The Journal of Biological Chemistry : JBC. 1999, 274(28), pp. 19581-19586. ISSN 0021-9258. eISSN 1083-351X. Available under: doi: 10.1074/jbc.274.28.19581
BibTex
@article{Glockzin1999-07-09Activ-42654,
  year={1999},
  doi={10.1074/jbc.274.28.19581},
  title={Activation of the Cell Death Program by Nitric Oxide Involves Inhibition of the Proteasome},
  number={28},
  volume={274},
  issn={0021-9258},
  journal={The Journal of Biological Chemistry : JBC},
  pages={19581--19586},
  author={Glockzin, Sandra and von Knethen, Andreas and Scheffner, Martin and Brüne, Bernhard}
}
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