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A Proximity Ligation-Based Method to Detect RNA-DNA Association.

Tyler K Fenstermaker1, Guizhi Sun1, Alexander Mazo1

  • 1Department of Biochemistry and Molecular Biology and Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA, USA.

Methods in Molecular Biology (Clifton, N.J.)
|May 25, 2019
PubMed
Summary
This summary is machine-generated.

We developed a novel RNA-DNA interaction assay (RDIA) using proximity ligation assays. This method effectively detects nascent RNA transcripts associated with newly synthesized DNA in various cell types.

Keywords:
DNA replicationNascent chromatinNascent transcriptionProximity ligationRNA transcriptionRNA-DNA interactions

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Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Background:

  • Assessing RNA-DNA interactions is crucial for understanding gene regulation and genome stability.
  • Existing methods for detecting RNA-DNA interactions can be complex or lack specificity.

Purpose of the Study:

  • To describe a modified RNA-DNA Interaction Assay (RDIA) protocol for robust detection of RNA-DNA interactions.
  • To validate the RDIA protocol using commercially available reagents.

Main Methods:

  • Differential labeling of DNA with EdU and RNA with BrdU.
  • Application of proximity ligation assays (PLA) to detect proximity between labeled DNA and RNA.
  • Implementation of a modified RDIA protocol using commercially available BrdU antibodies.

Main Results:

  • The modified RDIA protocol successfully detected nascent RNA transcripts on recently synthesized DNA.
  • The assay demonstrated efficacy in both cultured H1299 cells and mouse embryonic stem cells.
  • The protocol provides a detailed, reproducible method for assessing RNA-DNA interactions.

Conclusions:

  • The RDIA is a powerful and adaptable technique for studying RNA-DNA interactions.
  • This modified protocol offers a practical approach for researchers to investigate nascent transcription and DNA synthesis.
  • The RDIA facilitates the exploration of the functional and structural roles of RNA-DNA hybrids in cellular processes.