bs-70251R

DATASHEET

Host: Rabbit

Target Protein: p70 S6 Kinase (Ser398)

Specificity: Specific for endogenous levels of the ~70 kDa p70 S6K protein phosphorylated at Thr398. Immunolabeling is blocked by preadsorption with the Immunolabeling is blocked by preadsorption with the phosphopeptide used as antigen, but not by the corresponding non-phosphopeptide.

Modification Site: Ser398

Clonality: Polyclonal

Isotype: IgG

Swiss Prot: H1ZYE3

Source: Synthetic phospho-peptide corresponding to amino acid residues surrounding Thr398 of Drosophila p70 S6K protein, conjugated to keyhole limpet hemocyanin (KLH).

Purification: Antigen Affinity purification from Pooled whole antiserum

Storage Buffer: 10 mM HEPES (pH 7.5), 150 mM NaCl, 100 µg per ml BSA and 50% glycerol.

Storage: Storage at -20°C is recommended, as aliquots may be taken without freeze/thawing due to presence of 50% glycerol. Stable for at least 1 year at -20°C.

Background:

p70 S6 kinase (p70 S6K) is activated in a signaling pathway that includes mTOR and is a mitogen-activated Ser/Thr protein kinase that is required for cell growth and G1 cell cycle progression (Xio et al., 2009). p70 S6K is controlled by multiple phosphorylation events located within the catalytic, linker and pseudosubstrate domains and subsequently phosphorylates specifically ribosomal protein S6 (Saitoh et al., 2002). Phosphorylation of Thr-229 in the catalytic domain and Thr-389 in the linker domain are most critical for kinase function. Inhibition of p70 activity inhibits the entry into S phase of the cell cycle and exhibits cell cycle arrest at G0/G1 phase, suggesting that the activation of p70 S6k plays an obligatory role in mediating mitogenic signals during cell activation (Xio et al., 2009).