Incorporation of 8-hydroxyguanosine (8-oxo-7,8-dihydroguanosine) 5'-triphosphate by bacterial and human RNA polymerases
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概要
- 論文の詳細を見る
Oxidized RNA precursors formed in the nucleotide pool may be incorporated into RNA. In this study, the incorporation of 8-hydroxyguanosine 5'-triphosphate (8-OH-GTP; 8-oxo-7,8-dihydroguanosine 5'-triphosphate) into RNA by Escherichia coli RNA polymerase was examined in vitro, using a primer RNA and a template DNA with defined sequences. 8-OH-GTP was incorporated opposite C and A in the template DNA. Surprisingly, 8-OH-GTP was quite efficiently incorporated by the bacterial RNA polymerase, in contrast to the incorporation of the 2'-deoxyribo-counterpart by DNA polymerases, as indicated by the kinetic parameters. The primer was further extended by the addition of a ribonucleotide complementary to the nucleobase adjacent to C or A (the nucleobase opposite which 8-OH-GTP was inserted). Thus, the incorporation of 8-OH-GTP did not completely inhibit further RNA chain elongation. 8-OH-GTP was also incorporated opposite C and A by human RNA polymerase II. These results suggest that 8-OH-GTP in the nucleotide pool call cause the formation of oxidized RNA and disturb the transmittance of genetic information.
- Elsevier Inc.の論文
- 2009-06-15
著者
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Kamiya Hiroyuki
Faculty of Pharmaceutical Sciences, Hokkaido University
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原島 秀吉
北大院・薬学研究科
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Shim Chang
Faculty Of Pharmaceutical Sciences University Of Tokyo : (present Address) College Of Pharmacy Seoul
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SHIGENOBU Kohki
Faculty of Pharmaceutical Sciences, University of Tokyo
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Kasai Hiroshi
Inst. Of Industrial Ecological Sciences Univ. Of Occupational And Environmental Health 1-1 Iseigaoka
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Harashima Hideyoshi
Department Of Pharmacokinetics And Pharmaceutics Graduate School Of Pharmaceutical Sciences The Univ
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Kamiya Hiroyuki
産業医科大学産業生態科学研究所
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Murata-kamiya Naoko
Inst. Indust. Ecolog. Sci. Univ. Occup. Environ. Hith.
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Kaji Hiroshi
Inst. Indust. Ecolog. Sci. Univ. Occup. Environ. Hith.
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Kamiya Hiroyuki
Faculty Of Pharmaceutical Sciences Hokkaido University:crest Japan Science And Technology
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