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Deubiquitinating enzyme USP37 regulating oncogenic function of 14-3-3γ.
- Source :
-
Oncotarget [Oncotarget] 2015 Nov 03; Vol. 6 (34), pp. 36551-76. - Publication Year :
- 2015
-
Abstract
- 14-3-3 is a family of highly conserved protein that is involved in a number of cellular processes. In this study, we identified that the high expression of 14-3-3γ in various cancer cell lines correlates with the invasiveness of the cancer cells. Overexpression of 14-3-3γ causes changes to the morphologic characteristics of cell transformation, and promotes cell migration and invasion. The cells overexpressed with 14-3-3γ have been shown to stimulate foci and tumor formation in SCID-NOD mice in concert with signaling components as reported with the 14-3-3β. In our previous study, we demonstrated that 14-3-3γ inhibits apoptotic cell death and mediates the promotion of cell proliferation in immune cell lines. Earlier, binding partners for 14-3-3γ were defined by screening. We found that USP37, one of deubiquitinating enzymes (DUBs), belongs to this binding partner group. Therefore, we investigated whether 14-3-3γ mediates proliferation in cancer cells, and 14-3-3γ by USP37 is responsible for promoting cell proliferation. Importantly, we found that USP37 regulates the stability of ubiquitin-conjugated 14-3-3γ through its catalytic activity. This result implies that the interactive behavior between USP37 and 14-3-3γ could be involved in the regulation of 14-3-3γ degradation. When all these findings are considered together, USP37 is shown to be a specific DUB that prevents 14-3-3γ degradation, which may contribute to malignant transformation via MAPK signaling pathway, possibly providing a new target for therapeutic objectives of cancer.
Details
- Language :
- English
- ISSN :
- 1949-2553
- Volume :
- 6
- Issue :
- 34
- Database :
- MEDLINE
- Journal :
- Oncotarget
- Publication Type :
- Academic Journal
- Accession number :
- 26427597
- Full Text :
- https://doi.org/10.18632/oncotarget.5336