CST, 3054S, Phospho-LKB1 (Thr189) Antibody

Polyclonal Antibody for studying LKB1 (Thr189) phosphate. Validated for Western Blotting. Highly specific and rigorously validated in-house, Phospho-LKB1 (Thr189) Antibody (CST #3054) 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-LKB1 (Thr189) Antibody detects transfected levels of LKB1 only when phosphorylated at threonine 189. This antibody does not cross-react with LKB1 phosphorylated at other sites. Species Reactivity: Human Source / Purification Polyclonal antibodies are produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Thr189 of human LKB1. Antibodies are purified by protein A and peptide affinity chromatography. Background LKB1 (STK11) is a serine/threonine kinase and tumor suppressor that helps control cell structure, apoptosis and energy homeostasis through regulation of numerous downstream kinases (1,2). A cytosolic protein complex comprised of LKB1, putative kinase STRAD, and the MO25 scaffold protein, activates both AMP-activated protein kinase (AMPK) and several AMPK-related kinases (3). AMPK plays a predominant role as the master regulator of cellular energy homeostasis, controlling downstream effectors that regulate cell growth and apoptosis in response to cellular ATP concentrations (4). LKB1 appears to be phosphorylated in cells at several sites, including human LKB1 at Ser31/325/428 and Thr189/336/363 (5). Mutation in the corresponding LKB1 gene causes Peutz-Jeghers syndrome (PJS), an autosomal dominant disorder characterized by benign GI tract polyps and dark skin lesions of the mouth, hands, and feet (6). A variety of other LKB1 gene mutations have been associated with the formation of sporadic cancers in several tissues (7). Alternate Names hLKB1; Liver kinase B1; LKB1; PAR-4; PAR4; PJS; polarization-related protein LKB1; Renal carcinoma antigen NY-REN-19; serine/threonine kinase 11; Serine/threonine-protein kinase 11; Serine/threonine-protein kinase LKB1; Serine/threonine-protein kinase STK11; STK11 Specification REACTIVITY: H SENSITIVITY: Transfected Only MW (kDa): 54 SOURCE: Rabbit