14-3-3 sigma Protein, His-tag (Human)

Catalog #: 79037
Size: 20 μg
Species: Human
Host Species: Sf9 insect cells using baculovirus
MW: 30 kDa
Genbank #: NM_006142
Tag(s): N-terminal His tag
a.a: Full length
14-3-3 sigma or stratifin is a protein that is strongly induced by gamma irradiation and other DNA-damaging agents (1). The induction of 14-3-3 sigma is mediated by a p53 responsive element. Exogenous introduction of 14-3-3 sigma into cycling cells results in a G2 cell cycle arrest (2). Knockout of 14-3-3 sigma in cells showed that the cells are unable to maintain cell cycle arrest after DNA damage. The 14-3-3sigma -/- cells die as they enter mitosis. This process is associated with a failure of the 14-3-3sigma-deficient cells to sequester the proteins that initiate mitosis and prevent them from entering the nucleus. Thus, 14-3-3 sigma plays an important role in maintaining the G2 checkpoint in cells and preventing mitotic death.
Human 14-3-3 sigma Protein, GenBank Accession No. NM_006142, full length, with N-terminal His-tag, expressed in Sf9 insect cells using baculovirus. MW = 30 kDa.
14-3-3 sigma, SFN, stratifin, YWHAS
50mM sodium phosphate, pH 7.0, 300mM NaCl, 150mM imidazole, 0.1mM PMSF, 0.25mM DTT, 25% glycerol
Storage / Stability:
Store product at –70°C. For optimal storage, aliquot target into smaller quantities after centrifugation and store at recommended temperature. For most favorable performance, avoid repeated handling and multiple freeze/thaw cycles.
Western blot
1. Chan, T A. et al: 14-3-3-sigma is required to prevent mitotic catastrophe after DNA damage. Nature 401: 616-620, 1999.

2. Hermeking, H. et al: 14-3-3-sigma is a p53-regulated inhibitor of G2/M progression. Molec. Cell 1: 3-11, 1997.

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