Sestrin 2(SESN2), located at human chromosome 1p35.3, belongs to the sestrin family of proteins. These proteins are cystein sulfinyl reductases and they modulate peroxide signaling and antioxidant defense (1). This family of proteins is only present in multicellular organisms ranging from nematodes to mammals. These proteins selectively reduce or repair hyperoxidized forms of typical 2-Cys peroxiredoxins within eukaryotes (2). Peroxiredoxins are the enzymes that metabolize peroxides. Expression of these proteins is regulated by p53, a tumor suppressor protein (3). Recently it was reported that sestrin 2 is not a sulfinic peroxiredoxin reductase (4). Sestrin 2 is implicated in the regulation of cell growth and survival, in cellular responses to different stress conditions, and also acts as a positive regulator of autophagy (5). Depletion of sestrin 2 in human cancer cells reduced the level of autophagy when autophagy was induced in these cells (5).
Similar to sestrin 1, sestrin 2 negatively regulates the activity of mammalian target of rapamycin (mTOR), a positive regulator of cell growth (6). Sestrin 2 may be a promising target in the treatment of chronic obstructive pulmonary disease (COPD). It was reported that mutational inactivation of sestrin 2 induced TGF-β signaling and partially reduced the emphysema phenotype in mice model of COPD (7). Sestrin 2 might also be a key target in the treatment of cancer. It was shown to activate AMPK and repress mTORC1 signaling. AMPK is an essential mediator of LKB1 tumor suppressor and it is down-regulated in cancer cells (8). Sestrin 2 is approximately a 57.6kDa protein (480 amino acids).
The SESN2-selective antibodies were generated using peptide corresponding to human Sestrin 2 protein. SESN2-antibodies are affinity purified over immobilized antigen based chromatography, and the purified immunoglobulins are stabilized in antibody stabilization buffer. FabGennix Int. Inc., will also provide limited quantities of antigenic blocking protein for SESN-201AP antibody. Antibodies to SESN2 (SESN-201AP) will label ~57.6kDa protein in Western blot positive control samples for SESN2 (PC-SESN2) and several other tissues. FabGennix Inc. will conjugate this and other antibodies from its catalog to either secondary enzymes (alk-Pase or HRP) or fluorescent probes at a nominal cost upon request. FabGennix also provides custom antibody production services for researchers that are looking for high affinity mono and polylconal antibodies in various species. We specialize in making application specific antibodies that are useful in IHC, confocal and other applications where native antigen is detected. For a complete listing of all FabGennix antibodies please visit www.Fabgennix.com.
For research use only, not for diagnostic or therapeutic use.
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Sestrin 2
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