CST, 4104S, Ku70 (V540) Antibody

Polyclonal Antibody for studying Ku70. Validated for Western Blotting. Highly specific and rigorously validated in-house, Ku70 (V540) Antibody (CST #4104) 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 Ku70 (V540) Antibody detects endogenous levels of total Ku70 protein. Species Reactivity: Human, Monkey Source / Purification Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to the carboxy terminus of the human Ku70 protein. Antibodies are purified by protein A and peptide affinity chromatography. Background Ku is a heterodimeric protein composed of two subunits (Ku70 and Ku80) originally identified by researchers as autoantigens associated with several autoimmune diseases including scleroderma, polymyositis, and systemic lupus erythematosus (1). Ku is an abundant, ubiquitously expressed nuclear protein that binds to and stabilizes the ends of DNA at telomeres or double-stranded DNA breaks (2-5). The Ku70/Ku80 heterodimer has ATP-dependent DNA helicase activity and functions as the DNA-binding regulatory component of DNA-dependent protein kinase (DNA-PK) (6-8). The assembly of the DNA-PK complex at DNA ends is required for nonhomologous end-joining (NHEJ), one mechanism involved in double-stranded DNA break repair and V(D)J recombination (8). DNA-PK has been shown to phosphorylate many proteins, including p53, serum response factor, c-Jun, c-Fos, c-Myc, Oct-1, Sp-1, and RNA polymerase II (1,8). The combined activities of Ku70/Ku80 and DNA-PK implicate Ku in many cellular functions, including cell cycle regulation, DNA replication and repair, telomere maintenance, recombination, and transcriptional activation. Alternate Names 5'-deoxyribose-5-phosphate lyase Ku70; 5'-dRP lyase Ku70; 70 kDa subunit of Ku antigen; ATP-dependent DNA helicase 2 subunit 1; ATP-dependent DNA helicase II 70 kDa subunit; ATP-dependent DNA helicase II, 70 kDa subunit; CTC box binding factor 75 kDa subunit; CTC box-binding factor 75 kDa subunit; CTC75; CTCBF; DNA repair protein XRCC6; G22P1; Ku autoantigen p70 subunit; Ku autoantigen, 70kDa; Ku70; Lupus Ku autoantigen protein p70; ML8; thyroid autoantigen 70kD (Ku antigen); thyroid autoantigen 70kDa (Ku antigen); Thyroid-lupus autoantigen; thyroid-lupus autoantigen p70; TLAA; X-ray repair complementing defective repair in Chinese hamster cells 6; X-ray repair cross complementing 6; X-ray repair cross-complementing protein 6; XRCC6 Specification REACTIVITY: H Mk SENSITIVITY: Endogenous MW (kDa): 70 SOURCE: Rabbit