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XRCC6

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Anti-XRCC6 Recombinant Antibody Products

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For Research Use Only. Not For Clinical Use.


The p70/p80 autoantigen is a nuclear complex consisting of two subunits with molecular masses of approximately 70 and 80 kDa. The complex functions as a single-stranded DNA-dependent ATP-dependent helicase. The complex may be involved in the repair of nonhomologous DNA ends such as that required for double-strand break repair, transposition, and V(D)J recombination. High levels of autoantibodies to p70 and p80 have been found in some patients with systemic lupus erythematosus. [provided by RefSeq, Jul 2008]
Protein class

Cancer-related genes, Plasma proteins

Predicted location

Intracellular

Single cell type specificity

Cell type enhanced (Spermatocytes)

Immune cell specificity

Low immune cell specificity

Cell line specificity

Low cell line specificity

Interaction

Heterodimer composed of XRCC5/Ku80 and XRCC6/Ku70 (PubMed:11493912). Component of the core long-range non-homologous end joining (NHEJ) complex (also named DNA-PK complex) composed of PRKDC, LIG4, XRCC4, XRCC6/Ku70, XRCC5/Ku86 and NHEJ1/XLF (PubMed:12509254, PubMed:9742108, PubMed:12547193, PubMed:25941166, PubMed:25670504, PubMed:33854234). Additional component of the NHEJ complex includes PAXX (PubMed:25574025, PubMed:27601299, PubMed:27705800). Following autophosphorylation, PRKDC dissociates from DNA, leading to formation of the short-range NHEJ complex, composed of LIG4, XRCC4, XRCC6/Ku70, XRCC5/Ku86 and NHEJ1/XLF (PubMed:33854234). The XRCC5-XRCC6 dimer also associates with NAA15, and this complex binds to the osteocalcin promoter and activates osteocalcin expression (PubMed:12145306). In addition, XRCC6 interacts with the osteoblast-specific transcription factors MSX2, RUNX2 and DLX5 (PubMed:12145306). Interacts with ELF3 (PubMed:15075319). Interacts with ATP23 (PubMed:10219089). The XRCC5-XRRC6 dimer associates in a DNA-dependent manner with APEX1 (PubMed:8621488). Binds to CDK9 isoform 2 (PubMed:20493174). Identified in a complex with DEAF1 and XRCC5 (PubMed:22442688). Interacts with DEAF1 (via the SAND domain); the interaction is direct and may be inhibited by DNA-binding (PubMed:22442688). Interacts with CLU (By similarity). Interacts with NR4A3; the DNA-dependent protein kinase complex DNA-PK phosphorylates and activates NR4A3 and prevents NR4A3 ubiquitinylation and degradation (PubMed:25852083). Interacts with CYREN isoform 1 (CYREN-1) and isoform 4 (CYREN-2) (via KBM motif) (PubMed:27063109, PubMed:24610814, PubMed:28959974). Interacts (via N-terminus) with HSF1 (via N-terminus); this interaction is direct and prevents XRCC5/XRCC6 heterodimeric binding and non-homologous end joining (NHEJ) repair activities induced by ionizing radiation (IR) (PubMed:26359349). Part of the HDP-RNP complex composed of at least HEXIM1, PRKDC, XRCC5, XRCC6, paraspeckle proteins (SFPQ, NONO, PSPC1, RBM14, and MATR3) and NEAT1 RNA (PubMed:28712728). Interacts with HMBOX1 (PubMed:23685356). Interacts with ATF7 (PubMed:29490055). Interacts with APLF (via KBM motif) (PubMed:23689425, PubMed:27063109). Interacts with WRN (via KBM motif) (PubMed:27063109). The XRCC5-XRCC6 dimer associates with ALKBH2. (Microbial infection) Interacts with human T-cell leukemia virus 1/HTLV-1 protein HBZ.

Molecular function

Activator, DNA-binding, Helicase, Hydrolase, Lyase, Multifunctional enzyme

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