Regulation of homologous recombination repair protein Rad51 by Ku70
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Tianjin Key Laboratory of Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences, Tianjin 300192, China
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Corresponding author:
Fei-yue FAN, fan_feiyue@yeah.net
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Received Date:
2012-11-07
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Abstract
Objective To explore the regulative effect of non-homologous end joining(NHEJ)protein Ku70 on homologous recombination repair protein Rad51, and to investigate the synergistic mechanism of homologous recombination repair in combination with NHEJ. Methods Observed Rad51 protein expression after transfect Ku70 small interfering RNA or Ku70 plasmid DNA into tumor cells using Western blot. Results Expression of Rad51 was obviously reduced after pretreated with Ku70 small interfering RNA. And with the increasing expression of Ku70 protein after transfection of Ku70 plasmid DNA PGCsi3.0-hKu70 into tumor cell lines, the Rad51 protein expression was increased. Conclusion Ku70 protein has regulating effect on gene expression of Rad51, and it might participate in the collaboration between homologous recombination repair and NHEJ.
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References
[1]
|
Mao Z, Bozzella M, Seluanov A, et al. DNA repair by nonhomologous end joining and homologous recombination during cell cycle in human cells. Cell Cycle, 2008, 7(18):2902-2906. doi: 10.4161/cc.7.18.6679 |
[2]
|
Kass EM, Jasin M. Collaboration and competition between DNA double-strand break repair pathways. FEBS Lett, 2012, 584(17):3703-3708. |
[3]
|
Orii KE, Lee Y, Kondo N, et al. Selective utilization of nonhomologous end-joining and homologous recombination DNA repair pathways during nervous system development. Proc Natl Acad Sci USA, 2006, 103(26):10017-10022. doi: 10.1073/pnas.0602436103 |
[4]
|
Couëdel C, Mills KD, Barchi M, et al. Collaboration of homologous recombination and nonhomologous end-joining factors for the survival and integrity of mice and cells. Genes Dev, 2004, 18(11):1293-1304. doi: 10.1101/gad.1209204 |
[5]
|
Mills KD, Ferguson DO, Essers J, et al. Rad54 and DNA Ligase Ⅳ cooperate to maintain mammalian chromatid stability. Genes Dev, 2004, 18(11):1283-1292. doi: 10.1101/gad.1204304 |
[6]
|
Deckbar D, Jeggo PA, Löbrich M. Understanding the limitations of radiation-induced cell cycle checkpoints. Crit Rev Biochem Mol Biol, 2011, 46(4):271-283. doi: 10.3109/10409238.2011.575764 |
[7]
|
Suwaki N, Klare K, Tarsounas M. RAD51 paralogs:roles in DNA damage signalling, recombinational repair and tumorigenesis. Semin Cell Dev Biol, 2011, 22(8):898-905. doi: 10.1016/j.semcdb.2011.07.019 |
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Proportional views
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