In:
Angewandte Chemie International Edition, Wiley, Vol. 60, No. 12 ( 2021-03-15), p. 6624-6630
Abstract:
Variation of DNA conformation is important in regulating gene expression and mediating drug‐DNA interactions. However, directly probing transient DNA conformation changes is challenging owing to the dynamic nature of this process. We show a label‐free fluorescence method to monitor transient DNA conformation changes in DNA structures with various lengths and shapes using a DNA intercalator, K21. K21 can form transient excimers on the surface of DNA; the ratiometric emission of monomer and excimer correlate to DNA transient conformation stability in numerous DNA structures, including i‐motifs, G‐quadruplex structures, and single nucleotide mutation at random position. We analyzed the conformation dynamics of a single plasmid before and after enzyme digestion with confocal fluorescence microscopy. This method provides a label‐free fluorescence strategy to probe transient conformation changes of DNA structures and has potential in uncovering transient genomic processes in living cells.
Type of Medium:
Online Resource
ISSN:
1433-7851
,
1521-3773
DOI:
10.1002/anie.202014466
Language:
English
Publisher:
Wiley
Publication Date:
2021
detail.hit.zdb_id:
2011836-3
detail.hit.zdb_id:
123227-7