Anti-p95/NBS1 (phospho S343) antibody

Target data

Component of the MRN complex, which plays a central role in double-strand break (DSB) repair, DNA recombination, maintenance of telomere integrity and meiosis (PubMed : 10888888, PubMed : 15616588, PubMed : 18411307, PubMed : 18583988, PubMed : 18678890, PubMed : 19759395, PubMed : 23115235, PubMed : 28216226, PubMed : 28867292, PubMed : 9705271). The MRN complex is involved in the repair of DNA double-strand breaks (DSBs) via homologous recombination (HR), an error-free mechanism which primarily occurs during S and G2 phases (PubMed : 19759395, PubMed : 28867292, PubMed : 9705271). The complex (1) mediates the end resection of damaged DNA, which generates proper single-stranded DNA, a key initial steps in HR, and is (2) required for the recruitment of other repair factors and efficient activation of ATM and ATR upon DNA damage (PubMed : 19759395, PubMed : 9705271). The MRN complex possesses single-strand endonuclease activity and double-strand-specific 3'-5' exonuclease activity, which are provided by MRE11, to initiate end resection, which is required for single-strand invasion and recombination (PubMed : 19759395, PubMed : 28867292, PubMed : 9705271). Within the MRN complex, NBN acts as a protein-protein adapter, which specifically recognizes and binds phosphorylated proteins, promoting their recruitment to DNA damage sites (PubMed : 12419185, PubMed : 15616588, PubMed : 18411307, PubMed : 18582474, PubMed : 18583988, PubMed : 18678890, PubMed : 19759395, PubMed : 19804756, PubMed : 23762398, PubMed : 24534091, PubMed : 27814491, PubMed : 27889449, PubMed : 33836577). Recruits MRE11 and RAD50 components of the MRN complex to DSBs in response to DNA damage (PubMed : 12419185, PubMed : 18411307, PubMed : 18583988, PubMed : 18678890, PubMed : 24534091, PubMed : 26438602). Promotes the recruitment of PI3/PI4-kinase family members ATM, ATR, and probably DNA-PKcs to the DNA damage sites, activating their functions (PubMed : 15064416, PubMed : 15616588, PubMed : 15790808, PubMed : 16622404, PubMed : 22464731, PubMed : 30952868, PubMed : 35076389). Mediates the recruitment of phosphorylated RBBP8/CtIP to DSBs, leading to cooperation between the MRN complex and RBBP8/CtIP to initiate end resection (PubMed : 19759395, PubMed : 27814491, PubMed : 27889449, PubMed : 33836577). RBBP8/CtIP specifically promotes the endonuclease activity of the MRN complex to clear DNA ends containing protein adducts (PubMed : 27814491, PubMed : 27889449, PubMed : 30787182, PubMed : 33836577). The MRN complex is also required for the processing of R-loops (PubMed : 31537797). NBN also functions in telomere length maintenance via its interaction with TERF2 : interaction with TERF2 during G1 phase preventing recruitment of DCLRE1B/Apollo to telomeres (PubMed : 10888888, PubMed : 28216226). NBN also promotes DNA repair choice at dysfunctional telomeres : NBN phosphorylation by CDK2 promotes non-homologous end joining repair at telomeres, while unphosphorylated NBN promotes microhomology-mediated end-joining (MMEJ) repair (PubMed : 28216226). Enhances AKT1 phosphorylation possibly by association with the mTORC2 complex (PubMed : 23762398).