Crystal Structures and Repair Studies Reveal the Identity and the Base-Pairing Properties of the UV-Induced Spore Photoproduct DNA Lesion
作者:Korbinian Heil、Andrea Christa Kneuttinger、Sabine Schneider、Ulrike Lischke、Thomas Carell
DOI:10.1002/chem.201100177
日期:2011.8.22
UV light is one of the major causes of DNA damage. In spore DNA, due to an unusual packing of the genetic material, a special spore photoproduct lesion (SP lesion) is formed, which is repaired by the enzyme spore photoproduct lyase (Spl), a radical S‐adenosylmethionine (SAM) enzyme. We report here the synthesis and DNA incorporation of a DNA SP lesion analogue lacking the phosphodiester backbone. The
紫外线是DNA损伤的主要原因之一。在孢子DNA中,由于遗传物质的异常堆积,形成了特殊的孢子光产物病灶(SP病灶),该酶被孢子光产物裂解酶(Spl)(一种S-腺苷甲硫氨酸(SAM)自由基)酶修复。我们在这里报告缺少磷酸二酯主链的DNA SP损伤类似物的合成和DNA掺入。寡核苷酸用于修复研究,并与聚合酶作为模板共结晶,以阐明SP病变的构型并提供有关病变碱基配对特性的信息。结构分析与修复研究一起使我们能够清楚地了解优先修复的病变非对映异构体的身份。