Photosensitized [2 + 2] cycloaddition of N-acetylated cytosine affords stereoselective formation of cyclobutane pyrimidine dimer.

Photosensitized [2 + 2] cycloaddition of N-acetylated cytosine affords stereoselective formation of cyclobutane pyrimidine dimer.
复制标题

DOI:
10.1093/nar/gkq855
复制
发表时间:
2011-02
影响因子:
14.9
通讯作者:
Iwai S
Iwai S
中科院分区:
生物学2区
文献类型:
--
作者:
Yamamoto J;Nishiguchi K;Manabe K;Masutani C;Hanaoka F;Iwai S

文献摘要

参考文献

被引文献

相似文献

DNA中两个相邻碱基之间的光环加成产生环丁烷嘧啶二聚体(CPD),这是紫外线诱导的主要DNA损伤之一,具有顺式syn或反式syn结构。在本研究中,我们研究了部分保护胸苷基-(3’→5’)- n4 -乙酰-2’-脱氧-5-甲基胞苷的光敏分子内环加成反应,以阐明碱修饰对环加成反应的影响。该反应导致立体选择性形成反式syn CPD,随后是乙酰氨基的水解。胸腺苷基-(3′→5′)- n4 -乙酰-2′-脱氧胞苷的光环加成得到了相同的结果,而胸腺苷基-(3′→5′)-胸腺嘧啶的顺式-syn和反式-syn cpd都是由胸腺苷基-(3′→5′)-胸腺嘧啶形成的。动力学分析表明,酸催化水解的活化能与报道的胸腺嘧啶-胞嘧啶CPD相当。这些发现为合成含有反式同步CPD的寡核苷酸提供了一种新的策略。利用合成的寡核苷酸,对人DNA聚合酶η的翻译合成进行了分析。
Photocycloaddition between two adjacent bases in DNA produces a cyclobutane pyrimidine dimer (CPD), which is one of the major UV-induced DNA lesions, with either the cis-syn or trans-syn structure. In this study, we investigated the photosensitized intramolecular cycloaddition of partially-protected thymidylyl-(3′→5′)-N4-acetyl-2′-deoxy-5-methylcytidine, to clarify the effect of the base modification on the cycloaddition reaction. The reaction resulted in the stereoselective formation of the trans-syn CPD, followed by hydrolysis of the acetylamino group. The same result was obtained for the photocycloaddition of thymidylyl-(3′→5′)-N4-acetyl-2′-deoxycytidine, whereas both the cis-syn and trans-syn CPDs were formed from thymidylyl-(3′→5′)-thymidine. Kinetic analyses revealed that the activation energy of the acid-catalyzed hydrolysis is comparable to that reported for the thymine-cytosine CPD. These findings provided a new strategy for the synthesis of oligonucleotides containing the trans-syn CPD. Using the synthesized oligonucleotide, translesion synthesis by human DNA polymerase η was analyzed.
DOI: 10.1016/s1011-1344(00)00009-9
发表时间: 2000-02-01
影响因子: 5.4
作者:
Douki, T;Court, M;Cadet, J
通讯作者: Cadet, J
DOI: 10.1021/jo0356560
发表时间: 2004-03-05
影响因子: 3.6
作者:
Minter, DE;Winslow, CD
通讯作者: Winslow, CD
DOI: 10.1074/jbc.270.41.24174
发表时间: 1995-10-13
影响因子: 4.8
作者:
BARAK, Y;COHENFIX, O;LIVNEH, Z
通讯作者: LIVNEH, Z
DOI: 10.1021/bi00061a009
发表时间: 1993-03-16
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
LEMAIRE, DGE;RUZSICSKA, BP
通讯作者: RUZSICSKA, BP
DOI: 10.1093/emboj/19.12.3100
发表时间: 2000-06-15
期刊: EMBO JOURNAL
影响因子: 11.4
作者:
Masutani, C;Kusumoto, R;Hanaoka, F
通讯作者: Hanaoka, F