CST, 9157S, Phospho-LATS1 (Ser909) Antibody

Polyclonal Antibody for studying LATS1 (Ser909) phosphate. Validated for Western Blotting. Highly specific and rigorously validated in-house, Phospho-LATS1 (Ser909) Antibody (CST #9157) is ready to ship. Product Usage Information Western Blotting: 1:1000 Storage Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA and 50% glycerol. Store at -20°C. Do not aliquot the antibody. Protocol Available protocols: Western Blotting Specificity / Sensitivity Phospho-LATS1 (Ser909) Antibody detects endogenous levels of total LATS1 protein only when phosphorylated on Ser909. This antibody is predicted to cross react with LATS2 only when LATS2 is phosphorylated at Ser872. Species Reactivity: Human Source / Purification Polyclonal antibodies are produced by immunizing animals with a synthetic phosphopeptide corresponding to amino acids surrounding Ser909 of human LATS1. Antibodies are purified by protein A and peptide affinity chromatography. Background The Large tumor suppressor (LATS) proteins (LATS1, LATS2) are serine/threonine kinases that belong to the NDR family (1). The homolog (warts) was first identified as a tumor suppressor protein that plays a role in the maintenance of ploidy. Human LATS1 was shown to localize to the centrosome and the mitotic spindle and control G2/M transition by negatively regulating cdc2 kinase activity (2,3). LATS1 is also reported to play a role in the G1 tetraploidy checkpoint, via control of p53 expression (4). LATS1 affects cytokinesis by regulating actin polymerization through negative modulation of LIMK1 (5). LATS1 also binds the phosphorylated form of zyxin, a regulator of actin filament assembly. This interaction promotes localization of zyxin to the mitotic spindle, suggesting a role for actin regulatory proteins during mitosis (6). Decreased expression of LATS1 is associated with breast tumor aggressiveness (7), and mutations perturbing LATS1 have been associated with human sarcomas and ovarian sarcomas (8,9). LATS1 knockout mice develop soft-tissue sarcomas, ovarian stromal cell tumor, and display a high sensitivity to carcinogenic treatments (10). LATS1 and LATS2 have also been identified as key members of the Hippo signaling pathway, a conserved kinase cascade that functions to regulate cell growth and apoptosis (11). Phosphorylation of LATS by Mammalian Sterile-20-like proteins (e.g., MST1) results in LATS-mediated phosphorylation of the transcriptional co-activators YAP and TAZ (12, 13). LATS-mediated phosphorylation of YAP and TAZ promotes their cytoplasmic sequestration and association with 14-3-3 proteins, and subsequent proteasomal degradation, leading to downregulation of YAP/TAZ target genes that promote cell growth (11, 14). Alternate Names h-warts; Large tumor suppressor homolog 1; large tumor suppressor kinase 1; LATS (large tumor suppressor, Drosophila) homolog 1; LATS, large tumor suppressor, homolog 1; LATS, large tumor suppressor, homolog 1 (Drosophila); LATS1; Serine/threonine-protein kinase LATS1; WARTS; WARTS protein kinase; wts Specification REACTIVITY: H SENSITIVITY: Endogenous MW (kDa): 140 SOURCE: Rabbit