CTC75 antibody, CTCBF antibody, G22P1 antibody, KU70 antibody, ML8 antibody, TLAA antibody, 70kDa antibody, G22p1 antibody, Ku70 antibody, Kup70 antibody, X-ray repair cross complementing 6 antibody, ATP-dependent DNA helicase II, 70 kDa subunit antibody, X-ray repair complementing defective repair in Chinese hamster cells 6 L homeolog antibody, X-ray repair complementing defective repair in Chinese hamster cells 6 antibody, XRCC6 antibody, Bm1_41430 antibody, xrcc6.L antibody, Xrcc6 antibody
Background
Single 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.