Purification notesAffinity purified from rabbit antiserum by affinity chromatography using
epitope specific phosphopeptide. The antibody against non phosphopeptide was removed by chromatography using non phosphopeptide corresponding to the phosphorylation site.
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. Required for osteocalcin gene expression. 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. 5'-dRP lyase activity 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 ku70 family. Contains 1 Ku domain. Contains 1 SAP domain.
Developmental stageExpression does not increase during promyelocyte differentiation.
Post-translational modificationsPhosphorylation by PRKDC may enhance helicase activity. Phosphorylation of Ser-51 does not affect DNA repair.
Immunohistochemistry analysis of paraffin embedded
human lung carcinoma tissue using ab61783 at 1/50 dilution in the presence and abscence of immunizing peptide
Western blot - Ku70 (phospho S5) antibody (ab61783)
All lanes : Anti-Ku70 (phospho S5) antibody (ab61783) at 1/500 dilution
Lane 1 : extracts from HeLa cells with no immunizing peptide Lane 2 : extracts from HeLa cells with immunizing peptide
Predicted band size : 70 kDa Observed band size : 70 kDa
References for Anti-Ku70 (phospho S5) antibody (ab61783)
This product has been referenced in:
Schuler N et al. DNA-damage foci to detect and characterize DNA repair alterations in children treated for pediatric malignancies. PLoS One9:e91319 (2014).
Read more (PubMed: 24637877) »
Schuler N & Rübe CE Accumulation of DNA damage-induced chromatin alterations in tissue-specific stem cells: the driving force of aging? PLoS One8:e63932 (2013).
Read more (PubMed: 23691119) »