Research Project
Grant-in-Aid for Scientific Research (C)
To elucidate the dynamic process of DNA repair, we employed GFP-fusion technique and immmuno-cytochemistry combined with confocal laser microscope. We generated POLQ-GFP and expressed in human HeLa cells and found that PolQ accumulate at the oxidative DNA damage site induced by Laser. Further biochemical analysis revealed that PolQ bypass abasic sites in vitro. Taken together, we conclude that PolQ is a translesion polymerase involved in base excision repair. UBC13 is a ubiqutin conjugating enzyme whose function is unknown in vivo. We found that UBC13 is critical for DNA double strand break repair by facilitating the formation of DNA damage repair foci containing various repair proteins. In UBC13 deficient cells, accumulation of Rad51, RPA, Brcal to the damage sites are severely impaired, probably due to the insufficient processing of double strand break ends. We conclude that UBC13 facilitates double strand break repair mediated by homologous recombination. Ubiquitination of unknown substrate including histone proteins appear to play a critical role for generating the repair substrates for homologous recombination.
All 2007 2006 2005
All Journal Article (34 results) Book (2 results)
DNA Repair (Amst) (In press)
DNA Repair (Amst) 6
Pages: 280-292
Mol Cell Biol 27
Pages: 2812-2820
Mol Cell 25
Pages: 663-675
130007000910
DNA Repair (Amst)
Biochem Biophys Res Commun 352
Pages: 763-768
Mol Cell 23
Pages: 265-271
Mol Cell Biol 26
Pages: 8892-8900
Embo J 25
Pages: 1305-1314
DNA Repair (Amst) 5
Pages: 1021-1029
J Biol Chem 281
Pages: 13869-13872
Pages: 2000-2004
Cancer Res 66
Pages: 748-754
Mol Cell 24
Pages: 115-125
Pages: 1307-1316
EMBO J (印刷中)
Nucleic Acids Res 25
Pages: 6103-6111
Mol Cell Biol 25
Cancer Res 65
Pages: 11704-11711
Pages: 6948-6955
Mol Cell 20
Pages: 793-799
Pages: 1124-1134