摘要
Dear Editor,The DNA-dependent protein kinase catalytic subunit(DNA-PKcs)forms a serine/threonine protein kinase complex with the Ku heterodimer(Ku70/Ku80)and plays an important role in the DNA damage response(DDR)and maintenance of genomic stability through nonhomologous end joining(NHEJ),wherein the Ku heterodimer recognizes and binds broken DNA ends,facilitating the recruitment and activation of DNA-PKcs.1 Activated DNA-PKcs phosphorylates and alters the function of factors that mediate NHEJ,including DNA-PKcs itself.2 In addition,DDR-independent roles of DNA-PKcs have been demonstrated.3 Studies further identified DNA-PKcs as a modulator of cancer-associated pathways distinct from DNA repair,including hypoxia,metabolism,the inflammatory response,and transcriptional regulation.
基金
This work was supported by grants from the National Key Basic Research Program(973 Program)of MOST,China(Grant No.2015CB910601)
the National Natural Science Foundation of China(Grant Nos.31370843 and 31500681)to P.K
Zhou and the National Natural Science Foundation,China(Grant Nos.31570853 and 81602799)to T.Ma.
