ArticleEuropean biophysics journal : EBJ2015
The fluorescence properties and binding mechanism of SYTOX green, a bright, low photo-damage DNA intercalating agent.
Article in European biophysics journal : EBJ, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers.
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Who cites it
39 citing papers in PubMed.
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Authors and funding
3 authors.
Funding
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Abstract
DNA intercalators are widely used in cancer therapeutics, to probe protein-DNA interactions and to investigate the statistical-mechanical properties of DNA. Here, we employ single-molecule fluorescence microscopy, magnetic tweezers, and ensemble-binding assays to investigate the fluorescence properties and binding mechanism of SYTOX green, a DNA labeling dye previously used for staining dead cells and becoming of common use for single-molecule methodologies. Specifically, we show that SYTOX green presents several advantages with respect to other dyes: (1) binds DNA rapidly and with high affinity; (2) has a good signal-to-noise ratio even at low concentrations; (3) exhibits a low photobleaching rate; and (4) induces lower light-induced DNA degradation. Finally, we show that SYTOX green is a DNA intercalator that binds DNA cooperatively with a binding site of 3.5 bp, increasing the DNA length upon binding by 43%, while not affecting its mechanical properties.
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