Effects of Base Flipping on Guanine-Metal Electrode Transfer

这个联合奖在无机，生物无机和有机 化学计划和多学科活动办公室根据 学术界与工业界联系的资助机会（GOALI） 活动支持霍尔顿索普教授实验室的研究， 位于查佩尔山的北卡罗来纳州大学。 这项工作是为了发展 一种检测蛋白质碱基翻转的新生物分析方法， 结合DNA和RNA。 最初的研究将用已知的蛋白质来完成， 将碱基从核酸中移出，留下它们的互补碱基 “孤儿”，因此从核酸中挤出，从而使其暴露于 通过光化学激发的（Pt 2（pop）4）4-或通过（Ru（bpy）3）3+氧化， 其是电化学产生的。 该方法是专门针对鸟嘌呤 (G)残余物，其在氧化时产生8-O-G。 存在下 哌啶，8-O-G位点被切割，使得核酸测序 揭示了碱基（胞嘧啶）翻转的位点。 海先生正在接受研究， 将C转化为甲基化的蛋白质。 GOALI合作 涉及位于马萨诸塞州剑桥的新英格兰生物实验室（NEB），这是一个主要的 分子生物学限制酶供应商。 一个或多 来自剑桥的学生将在NEB进行克隆和过度表达酶 感兴趣，并将这一专业知识转移回联合国。 凝胶测定 结果将转移到NEB。 如果成功，目标 相互作用可以为研究 通过碱基翻转处理核酸的蛋白质。 这项由GOALI活动资助的研究探讨了 两种新的DNA裂解剂作为几种碱基翻转的指示剂 DNA结合蛋白。

This joint award in the Inorganic, Bioinorganic and Organometallic Chemistry program and the Office of Multidisciplinary Activities under the Grant Opportunities for Academic Liaison with Industry (GOALI) activity supports research in the laboratory of Professor Holden Thorp at the University of North Carolina at Chapel Hill. The work is to develop a new bioanalytical method of detecting base flipping by proteins that bind DNA and RNA. Initial studies will be done with proteins known to turn bases out of the nucleic acid, which leaves their complementary base `orphaned` and so extruded from the nucleic acid thereby exposing it to oxidation by photochemically excited (Pt2(pop)4)4- or by (Ru(bpy)3)3+, which is generated electrochemically. The method is specific to guanine (G) residues, which upon oxidation yields 8-O-G. In the presence of piperidine, the 8-O-G site is cleaved, so that nucleic acid sequencing reveals the site of base (cytosine) flipping. M.HhaI is now under study, which turns C into the protein for methylation. The GOALI collaboration involves New England Biolabs (NEB) in Cambridge MA, which is a primary supplier for restriction enzymes for molecular biology. One or more students from UNC would be hosted at NEB to clone and overexpress enzymes of interest and to transfer this expertise back to UNC. Gel assay results would be transferred to NEB. If successful, the GOALI interaction could provide an important new reagent for the study of proteins that process nucleic acids through base flipping. This research funded under the GOALI activity explores the use of two new DNA cleaving agents as indicators of base flipping by several important DNA binding proteins.