Translesion synthesis past 2'-deoxyxanthosine, a nitric oxide-derived DNA adduct, by mammalian DNA polymerases.
Translesion synthesis past 2'-deoxyxanthosine, a nitric oxide-derived DNA adduct, by mammalian DNA polymerases.
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通过哺乳动物 DNA 聚合酶跨损伤合成 2-脱氧黄苷(一种一氧化氮衍生的 DNA 加合物)。
DOI:
10.1016/j.jmb.2004.09.064
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发表时间:
2004
期刊:
影响因子:
--
通讯作者:
Shibutani,Shinya
中科院分区:
文献类型:
--
作者:
Yasui,Manabu;Suzuki,Naomi;Miller,Holly;Matsuda,Tomonari;Matsui,Saburo;Shibutani,Shinya
Cellular DNA is damaged by nitric oxide (NO), a multifunctional bioregulator and an environmental pollutant that has been implicated in diseases associated with cancer and chronic inflammation. 2′-Deoxyxanthosine (dX) is a major NO-derived DNA lesion. To explore the mutagenic potential of dX, a 38-mer oligodeoxynucleotide (5′CATGCTGATGAATTCCTTCXCTTCTTTCCTCTCCCTTT) modified site-specifically with dX at the X position was prepared post-synthetically and used as a DNA template in primer extension reactions catalyzed by calf thymus DNA polymerase (pol) α and human DNA pol β, η, and κ. Primer extension reactions catalyzed by pol α or β in the presence of four dNTPs were retarded at the dX lesion while pol η and κ readily bypassed the lesion. The fully extended products were analyzed to quantify the miscoding specificity and frequency of dX using two-phase polyacrylamide gel electrophoresis (PAGE). With pol α, η and κ, incorrect dTMP was preferentially incorporated opposite the lesion, along with lesser amounts of dCMP, the correct base. When pol β was used, direct incorporation of correct dCMP was primarily observed, accompanied by small amounts of misincorporation of dTMP, dAMP and dGMP. Steady-state kinetic analyses supported the results obtained from the two-phase PAGE assay. dX is a miscoding lesion capable of preferentially generating G→A mutations. The miscoding frequency varied depending on DNA polymerase used.
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影响因子:
4.7
作者:
Routledge,MN;Wink,DA;Keefer,LK;Dipple,A
通讯作者:
Dipple,A
DOI:
--
发表时间:
1981
期刊:
影响因子:
--
作者:
C. L. Young;R. Battino;W. Gerrard;H. Clever
通讯作者:
H. Clever
影响因子:
64.8
作者:
C. Bokhoven;H. Niessen
通讯作者:
H. Niessen
影响因子:
4.8
作者:
S. Uesugi;S. Y. Oda;Morio Ikehara;Yasutoshi Kawase;Eiko OhtsukaSP
通讯作者:
Eiko OhtsukaSP
影响因子:
4.1
作者:
Shibutani,S
通讯作者:
Shibutani,S