Anti-Ku-70 DNA introduction

Anti-Ku-70 DNA is a protein that, in humans, is encoded by the XRCC6 gene. Together, Ku70 and Ku80 accomplish up the Ku heterodimer, which binds to DNA double-strand breach ends and is appropriate for the non-homologous end abutting (NHEJ) alleyway of DNA repair. It is aswell appropriate for V(D)J recombination, which utilizes the NHEJ alleyway to advance antigen assortment in the beastly allowed system. In accession to its role in NHEJ, Ku is aswell appropriate for telomere breadth aliment and subtelomeric gene silencing. Ku was originally articular if patients with systemic lupus erythematosus were begin to accept top levels of autoantibodies to the protein. Ku70 heterodimerises with Ku80 to anatomy the ATP-dependent DNA helicase II, a individual abandoned helicase that binds preferentially to fork-like ends of double-stranded DNA in a corpuscle cycle-dependent manner. The heterodimer plays a role in non-homologous end-joining (NHEJ) appropriate for double-strand breach adjustment and V(D)J recombination. It acts as the authoritative subunit of the DNA-dependent protein kinase circuitous DNA-PK by accretion the affection of the catalytic subunit (PRKDC) for DNA. The Ku70/80 heterodimer is aswell appropriate for osteocalcin gene expression.

Anti-Ku-70 DNA is a protein that binds to DNA double-strand breach ends and is appropriate for the non-homologous end abutting (NHEJ) alleyway of DNA repair. Ku is evolutionarily conserved from bacilli to human. The affiliated bacterial Ku is a homodimer (two copies of the aforementioned protein apprenticed to anniversary other). Eukaryotic Ku is a heterodimer of two polypeptides, Ku70 (XRCC6) and Ku80 (XRCC5), so called because the atomic weight of the animal Ku proteins is about 70 kDa and 80 kDa. The two Ku subunits anatomy a basket-shaped anatomy that accoutrement assimilate the DNA end. Once bound, Ku can accelerate down the DNA strand, acceptance added Ku molecules to cilia assimilate the end. In college eukaryotes, Ku forms a circuitous with the DNA-dependent protein kinase catalytic subunit (DNA-PKcs) to anatomy the abounding DNA-dependent protein kinase, DNA-PK. Ku is anticipation to action as a atomic arch to which added proteins complex in NHEJ can bind. The Ku70 and Ku80 proteins abide of three structural domains. The N-terminal area is an alpha/beta domain. This area alone makes a baby addition to the dimer interface. The area comprises a six abandoned beta area of the Rossman fold. The axial area of Ku70 and Ku80 is a DNA-binding beta-barrel domain.

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