The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
1/1000 - 1/5000. Perform heat mediated antigen retrieval with citrate buffer pH 6 before commencing with IHC staining protocol.
Use at 2-5 - 5 µg/mg of lysate.
Application notesIs unsuitable for WB.
FunctionSingle stranded DNA-dependent ATP-dependent helicase. Has a role in chromosome translocation. The DNA helicase II complex binds preferentially to fork-like ends of double-stranded DNA in a cell cycle-dependent manner. It works in the 3'-5' direction. Binding to DNA may be mediated by XRCC6. Involved in DNA non-homologous end joining (NHEJ) required for double-strand break repair and V(D)J recombination. The XRCC5/6 dimer acts as regulatory subunit of the DNA-dependent protein kinase complex DNA-PK by increasing the affinity of the catalytic subunit PRKDC to DNA by 100-fold. The XRCC5/6 dimer is probably involved in stabilizing broken DNA ends and bringing them together. The assembly of the DNA-PK complex to DNA ends is required for the NHEJ ligation step. In association with NAA15, the XRCC5/6 dimer binds to the osteocalcin promoter and activates osteocalcin expression. The XRCC5/6 dimer probably also acts as a 5'-deoxyribose-5-phosphate lyase (5'-dRP lyase), by catalyzing the beta-elimination of the 5' deoxyribose-5-phosphate at an abasic site near double-strand breaks. XRCC5 probably acts as the catalytic subunit of 5'-dRP activity, and allows to 'clean' the termini of abasic sites, a class of nucleotide damage commonly associated with strand breaks, before such broken ends can be joined. The XRCC5/6 dimer together with APEX1 acts as a negative regulator of transcription.
Sequence similaritiesBelongs to the ku80 family. Contains 1 Ku domain.
Developmental stageExpression increases during promyelocyte differentiation.
DomainThe EEXXXDDL motif is required for the interaction with catalytic subunit PRKDC and its recruitment to sites of DNA damage.
Post-translational modificationsPhosphorylated on serine residues. Phosphorylation by PRKDC may enhance helicase activity. Sumoylated.
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of human prostate carcinoma tissue labelling Ku80 with ab93863 at 1/1000 (1µg/ml). Detection: DAB.
Immunoprecipitation - Ku80 antibody (ab93863)
ab93863 was used to immunoprecipitate Ku80 at 3 µg/mg of HeLa whole cell lysate. 20% of the immunoprecipitate was loaded on the gel and probed with a different anti-Ku80 antibody at 0.4 µg/ml. Detection: chemiluminescence with an exposure time of 30 seconds.
References for Anti-Ku80 antibody (ab93863)
has not yet been referenced specifically in any publications.
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