摘要
背景与目的微小染色体维持蛋白(mini-chromosome maintenance proteins,MCM)MCM7为MCM复合体成员之一,在启动DNA复制、合成中起关键作用,但对能够与其结合的蛋白所知甚少。本研究应用酵母双杂交方法筛选肺癌组织中MCM7蛋白的结合蛋白。方法构建MCM7全长cDNA-pGBKT7质粒,与含肺癌组织cDNA文库-pACT2质粒转化酵母AH109,在涂有X-a-gal营养缺陷型培养基(SD/-Trp-Leu-His-Ade)上筛选生长,挑选蓝色克隆,提取此酵母克隆的质粒,转化大肠杆菌提取质粒DNA后测序,进行生物信息学分析。结果筛选出11种与MCM7蛋白特异性相互作用的蛋白,其中细胞骨架蛋白5种,各种酶、激酶以及相关受体6种。结论克隆到的基因对进一步研究MCM7蛋白的功能有一定提示作用。
Background and objective MCM7 is a subunit of the MCM complex that plays a key role in DNA replication initiation. But little is known about its interaction proteins. In this study yeast two hybrid screening was used to identify the MCM7 interacting proteins. Methods Yeast expression vector containing human full length MCM7- pGBKT7 plasmid was constructed, and with a library of cDNAs from human lung cancer-pACT2 plasmid was transformed into yeast strain AH109, and was electively grew in X-a-gal auxotrophy m...
出处
《中国肺癌杂志》
CAS
2008年第4期509-512,共4页
Chinese Journal of Lung Cancer
基金
辽宁省自然科学基金项目(No.20052085)资助~~
