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Updated: Jun 27, 2025

Studying DNA Looping by Single-Molecule FRET
Published on: June 28, 2014
Approaches for Mapping and Analysis of R-loops
Pramiti Mukhopadhyay1, Henry Miller2, Aiola Stoja1
1Greehey Children's Cancer Research Institute, UT Health San Antonio, San Antonio, Texas.
Abstract:
R-loops are nucleic acid structures composed of a DNA:RNA hybrid with a displaced non-template single-stranded DNA. Current approaches to identify and map R-loop formation across the genome employ either an antibody targeted against R-loops (S9.6) or a catalytically inactivated form of RNase H1 (dRNH1), a nuclease that can bind and resolve DNA:RNA hybrids via RNA exonuclease activity. This overview article outlines several ways to map R-loops using either methodology, explaining the differences and similarities among the approaches. Bioinformatic analysis of R-loops involves several layers of quality control and processing before visualizing the data. This article provides resources and tools that can be used to accurately process R-loop mapping data and explains the advantages and disadvantages of the resources as compared to one another. © 2024 Wiley Periodicals LLC.
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