CST, 9311S, MARK3 Antibody

Polyclonal Antibody for studying MARK3. Validated for Western Blotting,Immunoprecipitation. Highly specific and rigorously validated in-house, MARK3 Antibody (CST #9311) is ready to ship. Product Usage Information Western Blotting: 1:1000 Immunoprecipitation: 1:50 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, Immunoprecipitation Specificity / Sensitivity MARK3 Antibody detects endogenous levels of total MARK3 protein. No cross-reactivity is observed with other family members. Species Reactivity: Human, Mouse, Rat Source / Purification Polyclonal antibodies are produced by immunizing animals with a synthetic peptide surrounding Asn500 of human MARK3. Antibodies were purified by protein A and peptide affinity chromatography. Background Microtubule associated proteins regulate the stability of microtubules and control processes such as cell polarity/differentiation, neurite outgrowth, cell division and organelle trafficking (1). The MARK (MAP/microtubule affinity-regulating kinases) family (MARK1-4) of serine/threonine kinases was identified based on their ability to phosphorylate microtubule-associated proteins (MAPs) including tau, MAP2 and MAP4 (2-6). MARK proteins phosphorylate MAPs within their microtubule binding domains, causing dissociation of MAPs from microtubules and increased microtubule dynamics (2-4). In the case of tau, phosphorylation has been hypothesized to contribute to the formation of neurofibrillary tangles observed in Alzheimer's disease. Overexpression of MARK leads to hyperphosphorylation of MAPs, morphological changes and cell death (4). The tumor suppressor kinase LKB1 phosphorylates MARK and the closely related AMP-kinases within their T-loops, leading to increased activity (7). MARK3 is an ubiquitously expressed member of the MARK/EMK/Par-1 family that was identified as Cdc25C-associated protein kinase (C-TAK1) based on its association and ability to phosphorylate Cdc25C (8). MARK3 substrates include Cdc25C phosphatase, MAPK scaffold kinase suppressor of Ras1 (KSR1) (9), protein-tyrosine phosphatase H1 (PTPH1) (10), plakophilin 2 (PKP2) (11), and histone deacetylases (HDACs) (12). MARK3 phosphorylates Cdc25C on serine 216 in response to DNA damage which allows for the preferential binding of 14-3-3 proteins that control entry into mitosis (8). MARK3 has also been shown to phosphorylate HDAC7 on one of its 14-3-3 binding sites that effects both the subcellular localization and repressive function of the HDAC (12). Alternate Names C-TAK1; Cdc25C-associated protein kinase 1; CTAK1; ELKL motif kinase 2; EMK-2; EMK2; KP78; MAP/microtubule affinity-regulating kinase 3; MARK3; microtubule affinity regulating kinase 3; Par-1a; PAR1A; Protein kinase STK10; Ser/Thr protein kinase PAR-1; Serine/threonine-protein kinase p78; VIPB Specification REACTIVITY: H M R SENSITIVITY: Endogenous MW (kDa): 83 SOURCE: Rabbit