Ontology type: schema:ScholarlyArticle
2018-09
AUTHORS ABSTRACTSestrins are evolutionary conserved stress-inducible genes which regulate the axis of cell survival and cell death. Suppression of Sestrin 2 (SESN2) has been linked with increase in oxidative stress and cell death but mechanistic details related to regulation of SESN2 during mitochondrial damage remain unknown. Our study shows that prolonged CCCP-induced mitochondrial damage decreases SESN2 levels and viability of SH-SY5Y cells while overexpression of SESN2 significantly rescues the viability of cells. Further, we demonstrate that Ring box protein 1 (RBX1) is a novel interactive partner and E3 ligase for SESN2 which mediates its K-48-linked ubiquitination upon extensive mitochondrial damage. Downregulation of RBX1 causes stabilization in levels of SESN2. Notably, silencing of RBX1 expression substantially declines cell death and generation of mitochondrial ROS in response to prolonged mitochondrial damage. Taken together, we suggest that SESN2 is critical to protect cells against detrimental effect of mitochondrial damage and RBX1 is a negative regulator of SESN2 which hampers its stabilization. More... »
PAGES1-9
http://scigraph.springernature.com/pub.10.1007/s11010-017-3267-7
DOIhttp://dx.doi.org/10.1007/s11010-017-3267-7
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