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The DOI matches its Crossref record; 44 of the 44 references it cites were found in a registry or an index.

Cell Cycle Dependence of DNA-dependent Protein Kinase Phosphorylation in Response to DNA Double Strand Breaks

Open access
Chen, Benjamin P.C., Chan, Doug W., Kobayashi, Junya, Burma, Sandeep, Asaithamby, Aroumougame, Morotomi-Yano, Keiko, Botvinick, Elliot, Qin, Jun, Chen, David J.·2005·Journal of Biological Chemistry

Abstract

DNA-dependent protein kinase (DNA-PK), consisting of Ku and DNA-PKcs subunits, is the key component of the non-homologous end-joining (NHEJ) pathway of DNA double strand break (DSB) repair. Although the kinase activity of DNA-PKcs is essential for NHEJ, thus far, no in vivo substrate has been conclusively identified except for an autophosphorylation site on DNA-PKcs itself (threonine 2609). Here we report the ionizing radiation (IR)-induced autophosphorylation of DNA-PKcs at a novel site, serine 2056, the phosphorylation of which is required for the repair of DSBs by NHEJ. Interestingly, IR-induced DNA-PKcs autophosphorylation is regulated in a cell cycle-dependent manner with attenuated phosphorylation in the S phase. In contrast, DNA replication-associated DSBs resulted in DNA-PKcs autophosphorylation and localization to DNA damage sites. These results indicate that although IR-induced DNA-PKcs phosphorylation is attenuated in the S phase, DNA-PKcs is preferentially activated by the physiologically relevant DNA replication-associated DSBs at the sites of DNA synthesis.

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Metadata

Authors
Chen, B. P. C., Chan, D. W., Kobayashi, J., Burma, S., Asaithamby, A., Morotomi-Yano, K., Botvinick, E., Qin, J., & Chen, D. J.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2005-04
Volume
280
Issue
15
Pages
14709-14715
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2097517187
Cited by
320
References
44
FWCI
5.76
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Cell Cycle Dependence of DNA-dependent Protein Kinase Phosphorylation in Response to DNA Double Strand Breaks. https://app.cochat.ai/papers/10.1074/jbc.m408827200
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Chen, B. P. C., Chan, D. W., Kobayashi, J., Burma, S., Asaithamby, A., Morotomi-Yano, K., Botvinick, E., Qin, J., & Chen, D. J. (2005). Cell Cycle Dependence of DNA-dependent Protein Kinase Phosphorylation in Response to DNA Double Strand Breaks. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m408827200

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