14-3-3 sigma Protein, His-tag (Human) Recombinant
Catalog #
79037
$395
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Description
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.
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Synonyms
14-3-3 sigma, SFN, stratifin, YWHAS
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Product Data Gallery
Product Info
Storage and Usage
Citations
Species
Human
Host Species/Expression System
Sf9 insect cells using baculovirus
Formulation
50mM sodium phosphate, pH 7.0, 300mM NaCl, 150mM imidazole, 0.1mM PMSF, 0.25mM DTT, 25% glycerol
MW
30 kDa
Amino Acids
Full length
Genbank #
NM_006142
UniProt #
P31947
Background
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.
References
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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