...
首页> 外文期刊>Biochemistry >A New Binary System for Photosensitized Labeling of DNA polymerases in Nuclear Extract
【24h】

A New Binary System for Photosensitized Labeling of DNA polymerases in Nuclear Extract

机译:光敏标记核提取物中DNA聚合酶的新二元系统。

获取原文
获取原文并翻译 | 示例
           

摘要

A binary syste of reagents was used for photosensitized labeling of proteind of boving testis nuclear extract.A dUTP analog containing 4-azido-2,5-difuoro-3-chloropyridyl group (FAP-dUTP) was used for the first time as a compo-nent of the binary system,and a dUTP analog containing the pyrenyl proup 9Pyr-dUTP) was used as a photosensitizer.Photoaffinity labeling of proteins of nuclear extract was pefrormed using the radioactively labeled DNA duplex with the pho-toreactive FAP group at the 3'-end of elongation DNA strand and analog of the deoxyribose phosphate residue 93-hydroxy-2-hydroxymethylateraahydrofuran (F) 5'-phosphate) at the 5'-end of the nick.Such structure is formed by the action of nuclear extract enzymes from the initial DNA duplex containing a synthetic apurine/apydimidine site and is a photoreactive analogy of a long-patch base excision repair intermediate.UV-irradiation modified a limited number of proteins of the nuclear extract.As shown using specific antibodies,the new binary system of photoreagents increased the effeciency of DNA poly-merase beta labeling.
机译:使用二元试剂对感光的睾丸核提取物蛋白质进行光敏标记。首次使用含有4-叠氮基-2,5-二氟--3-氯吡啶基(FAP-dUTP)的dUTP类似物作为化合物。 -二元体系,并使用含有the基脯氨酸9Pyr-dUTP的dUTP类似物作为光敏剂。使用放射性标记的DNA双链体与光反应性FAP组的3进行放射性标记,对核提取物蛋白质进行光亲和标记。切口的5'末端的DNA延长链末端和脱氧核糖磷酸残基的类似物93-羟基-2-羟甲基ateraahydrofuran(F)5'-磷酸),这种结构是由核提取酶的作用形成的最初的DNA双链体含有一个合成的嘌呤/嘧啶位点,是长补片碱基切除修复中间体的光反应类似物。紫外线照射修饰了核提取物的有限数量的蛋白质。如使用特异性抗体所示,ne w光试剂的二元体系提高了DNA聚合酶β标记的效率。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号