The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
1/100 - 1/500. Perform heat mediated antigen retrieval before commencing with IHC staining protocol.
FunctionMay have a role in checkpoint signaling during mitosis. Enhances TP53-mediated transcriptional activation. Plays a role in the response to DNA damage.
Involvement in diseaseNote=A chromosomal aberration involving TP53BP1 is found in a form of myeloproliferative disorder chronic with eosinophilia. Translocation t(5;15)(q33;q22) with PDGFRB creating a TP53BP1-PDGFRB fusion protein.
Sequence similaritiesContains 2 BRCT domains.
Post-translational modificationsAsymmetrically dimethylated on Arg residues by PRMT1. Methylation is required for DNA binding. Phosphorylated at basal level in the absence of DNA damage. Hyper-phosphorylated in an ATM-dependent manner in response to DNA damage induced by ionizing radiation. Hyper-phosphorylated in an ATR-dependent manner in response to DNA damage induced by UV irradiation.
Cellular localizationNucleus. Chromosome > centromere > kinetochore. Associated with kinetochores. Both nuclear and cytoplasmic in some cells. Recruited to sites of DNA damage, such as double stand breaks. Methylation of histone H4 at 'Lys-20' is required for efficient localization to double strand breaks.
ab82550, at a 1:250 dilution, staining Human 53BP1 (phospho Ser25) in colon adenocarcinoma (lambda and CIP phosphatase treated), using Immunohistochemistry, Formalin/PFA-fixed paraffin-embedded tissue,
References for Anti-53BP1 (phospho S25) antibody (ab82550)
This product has been referenced in:
Roossink F et al. The role of ATM and 53BP1 as predictive markers in cervical cancer. Int J Cancer131:2056-66 (2012).
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