X-Ray Repair Cross-Complementing Protein 6 (XRCC6/G22P1) Human Recombinant Protein

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]

Ku70: a mini-chromosome maintenance protein, essential for the initiation of eukaryotic genome replication. Allows DNA to undergo a single round of replication per cell cycle. Required for the entry in S phase and for cell division.

Protein type: Nuclear receptor co-regulator; Helicase; EC 3.6.4.-; DNA-binding; EC 4.2.99.-; RNA-binding; DNA repair, damage

Chromosomal Location of Human Ortholog: 22q13.2

Cellular Component: cytosol; membrane; nuclear chromosome, telomeric region; nuclear telomere cap complex; nucleoplasm; nucleus; transcription factor complex

Molecular Function: 5'-deoxyribose-5-phosphate lyase activity; ATP binding; ATP-dependent DNA helicase activity; damaged DNA binding; DNA binding; double-stranded DNA binding; double-stranded telomeric DNA binding; protein binding; protein C-terminus binding

Biological Process: DNA duplex unwinding; DNA ligation; DNA recombination; DNA repair; double-strand break repair; double-strand break repair via nonhomologous end joining; innate immune response; negative regulation of transcription, DNA-dependent; positive regulation of interferon type I production; positive regulation of transcription from RNA polymerase II promoter; positive regulation of transcription, DNA-dependent; protein heterotetramerization; regulation of smooth muscle cell proliferation; telomere maintenance; transcription, DNA-dependent; viral reproduction