Product Pathways - DNA Damage
Ku80 (C48E7) Rabbit mAb #2180
|W IP IHC-P IHC-F IF-IC||H Mk||Endogenous||86||Rabbit IgG|
Reactivity Key: H=Human Mk=Monkey
Species cross-reactivity is determined by western blot. Species enclosed in parentheses are predicted to react based on 100% sequence homology.
Specificity / Sensitivity
Ku80 (C48E7) Rabbit mAb detects endogenous levels of total Ku80 protein.
Source / Purification
Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to the carboxy terminus of human Ku80.
Western blot analysis of cell extracts from HeLa, A549 and COS cells using Ku80 (C48E7) Rabbit mAb.
Immunohistochemical analysis of paraffin-embedded human glioblastoma using Ku80 (C48E7) Rabbit mAb.
Immunohistochemical analysis of paraffin-embedded human colon carcinoma using Ku80 (C48E7) Rabbit mAb.
Immunohistochemical analysis of paraffin-embedded human melanoma using Ku80 (C48E7) Rabbit mAb.
Immunohistochemical analysis of paraffin-embedded human GIST using Ku80 (C48E7) Rabbit mAb.
Confocal immunofluorescent analysis of HeLa cells using Ku80 (C48E7) Rabbit mAb (green). Actin filaments have been labeled with Alexa Fluor® 555 phalloidin (red).
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.
- Tuteja, R. and Tuteja, N. (2000) Crit. Rev. Biochem. Mol. Biol. 35, 1-33.
- Blier, P.R. et al. (1993) J. Biol. Chem. 268, 7594-7601.
- Jin, S. and Weaver, D.T. (1997) EMBO J. 16, 6874-6885.
- Boulton, S.J. and Jackson, S.P. (1998) EMBO J. 17, 1819-1828.
- Gravel, S. et al. (1998) Science 280, 741-744.
- Cao, Q.P. et al. (1994) Biochemistry 33, 8548-8557.
- Lees-Miller, S.P. et al. (1990) Mol. Cell Biol. 10, 6472-6481.
- Collis, S.J. et al. (2005) Oncogene 24, 949-961.
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For Research Use Only. Not For Use In Diagnostic Procedures.