Analysis of Protein Interactions in situ by Proximity Ligation Assays

  • Björn Koos
  • Linda Andersson
  • Carl-Magnus Clausson
  • Karin Grannas
  • Axel Klaesson
  • Gaëlle Cane
  • Ola SöderbergEmail author
Part of the Current Topics in Microbiology and Immunology book series (CT MICROBIOLOGY, volume 377)


The fate of the cell is governed by interactions among proteins, nucleic acids, and other biomolecules. It is vital to look at these interactions in a cellular environment if we want to increase our understanding of cellular processes. Herein we will describe how the in situ proximity ligation assay (in situ PLA) can be used to visualize protein interactions in fixed cells and tissues. In situ PLA is a novel technique that uses DNA, together with DNA modifying processes such as ligation, cleavage, and polymerization, as tools to create surrogate markers for protein interactions of interest. Different in situ PLA designs make it possible not only to detect protein–protein interactions but also post-translational modifications and interactions of proteins with nucleic acids. Flexibility in DNA probe design and the multitude of different DNA modifying enzymes provide the basis for modifications of the method to make it suitable to use in many applications. Furthermore, examples of how in situ PLA can be combined with other methods for a comprehensive view of the cellular activity status are discussed.


Rolling Circle Amplification Proximity Ligation Assay Reporter Molecule Padlock Probe Affinity Reagent 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Björn Koos
    • 1
  • Linda Andersson
    • 1
  • Carl-Magnus Clausson
    • 1
  • Karin Grannas
    • 1
  • Axel Klaesson
    • 1
  • Gaëlle Cane
    • 1
  • Ola Söderberg
    • 1
    Email author
  1. 1.Department of Immunology, Genetics and Pathology Science for Life Laboratory, BMCUppsala UniversityUppsalaSweden

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