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DNA‑PKcs PARylation regulates DNA‑PK kinase activity in the DNA damage response

  • Authors:
    • Yang Han
    • Feng Jin
    • Ying Xie
    • Yike Liu
    • Sai Hu
    • Xiao‑Dan Liu
    • Hua Guan
    • Yongqing Gu
    • Teng Ma
    • Ping‑Kun Zhou
  • View Affiliations / Copyright

    Affiliations: Institute for Environmental Medicine and Radiation Hygiene, School of Public Health, University of South China, Hengyang, Hunan 421001, P.R. China, Department of Radiation Biology, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing 100850, P.R. China
    Copyright: © Han et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 3609-3616
    |
    Published online on: September 2, 2019
       https://doi.org/10.3892/mmr.2019.10640
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Abstract

DNA‑dependent protein kinase catalytic subunit (‑PKcs) is the core protein involved in the non‑homologous end‑joining repair of double‑strand breaks. In addition, it can form a complex with poly(ADP‑ribose) polymerase 1 (PARP1), which catalyzes protein PARylation. However, it is unclear how DNA‑PKcs interacts with PARP1 in the DNA damage response and how PARylation affects DNA‑PK kinase activity. Using immunoprecipitation, immunofluorescence and flow cytometry the present study found that DNA‑PKcs was PARylated after DNA damage, and the PARP1/2 inhibitor olaparib completely abolished DNA‑PKcs PARylation. Olaparib treatment prevented DNA‑PKcs protein detachment from chromatin after DNA damage and maintained DNA‑PK activation, as evidenced by DNA‑PKcs Ser2056 phosphorylation. Furthermore, olaparib treatment synergized with DNA‑PK inhibition to suppress cell survival. All of the above results are suggestive of the important role of DNA‑PKcs PARylation in regulating DNA‑PK activity.
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Copy and paste a formatted citation
Spandidos Publications style
Han Y, Jin F, Xie Y, Liu Y, Hu S, Liu XD, Guan H, Gu Y, Ma T, Zhou PK, Zhou PK, et al: DNA‑PKcs PARylation regulates DNA‑PK kinase activity in the DNA damage response. Mol Med Rep 20: 3609-3616, 2019.
APA
Han, Y., Jin, F., Xie, Y., Liu, Y., Hu, S., Liu, X. ... Zhou, P. (2019). DNA‑PKcs PARylation regulates DNA‑PK kinase activity in the DNA damage response. Molecular Medicine Reports, 20, 3609-3616. https://doi.org/10.3892/mmr.2019.10640
MLA
Han, Y., Jin, F., Xie, Y., Liu, Y., Hu, S., Liu, X., Guan, H., Gu, Y., Ma, T., Zhou, P."DNA‑PKcs PARylation regulates DNA‑PK kinase activity in the DNA damage response". Molecular Medicine Reports 20.4 (2019): 3609-3616.
Chicago
Han, Y., Jin, F., Xie, Y., Liu, Y., Hu, S., Liu, X., Guan, H., Gu, Y., Ma, T., Zhou, P."DNA‑PKcs PARylation regulates DNA‑PK kinase activity in the DNA damage response". Molecular Medicine Reports 20, no. 4 (2019): 3609-3616. https://doi.org/10.3892/mmr.2019.10640
Copy and paste a formatted citation
x
Spandidos Publications style
Han Y, Jin F, Xie Y, Liu Y, Hu S, Liu XD, Guan H, Gu Y, Ma T, Zhou PK, Zhou PK, et al: DNA‑PKcs PARylation regulates DNA‑PK kinase activity in the DNA damage response. Mol Med Rep 20: 3609-3616, 2019.
APA
Han, Y., Jin, F., Xie, Y., Liu, Y., Hu, S., Liu, X. ... Zhou, P. (2019). DNA‑PKcs PARylation regulates DNA‑PK kinase activity in the DNA damage response. Molecular Medicine Reports, 20, 3609-3616. https://doi.org/10.3892/mmr.2019.10640
MLA
Han, Y., Jin, F., Xie, Y., Liu, Y., Hu, S., Liu, X., Guan, H., Gu, Y., Ma, T., Zhou, P."DNA‑PKcs PARylation regulates DNA‑PK kinase activity in the DNA damage response". Molecular Medicine Reports 20.4 (2019): 3609-3616.
Chicago
Han, Y., Jin, F., Xie, Y., Liu, Y., Hu, S., Liu, X., Guan, H., Gu, Y., Ma, T., Zhou, P."DNA‑PKcs PARylation regulates DNA‑PK kinase activity in the DNA damage response". Molecular Medicine Reports 20, no. 4 (2019): 3609-3616. https://doi.org/10.3892/mmr.2019.10640
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