Hydroxyl radical footprinting of fluorescently labeled DNA
2016
Gerasimova, N. S. | Studitsky, V. M.
Footprinting is one of the simplest and most accurate approaches to investigate structure and interaction of biopolymers. It is based on the more difficult accessibility of intra- and intermolecular contacts for external damaging agents. According to this method, one end of polymer molecules is labeled before a sample is incubated with a damaging agent. The distribution of split products is used to conclude on the accessibility of different polymer regions under specific conditions. A variety of enzymatic and chemical splitting agents are used for footprinting. Currently, the highest temporal and spatial resolution without profound specificity to a nucleotide sequence can be reached with the use of hydroxyl radicals. A new variant of this approach, which suggests the use of DNA fluorescent labeling together with the present-day quantitative analysis, will allow extending the method’s boundaries.
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