An Interactome Assay for Detecting Interactions between Extracellular Domains of Receptor Kinases

Jente Stouthamer, Sergio Martin-Ramirez, Elwira Smakowska-Luzan*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

Abstract

Interactions between extracellular domains (ECDs) are crucial for many physiological processes in the cell, most importantly perception of its environment. However, studying these often-transient interactions can be challenging. Here we describe a method that allows for in vitro detection of extracellular domain interactions through an oligomerization-based cell surface interaction (CSI) assay. In a CSI, bait- and prey-tagged proteins are produced and secreted by Drosophila S2 cells to ensure proper folding and post-translational modifications. Subsequently, Bait (FC fragment) and Prey (pentamer domain and alkaline phosphatase) tags allow the detection of interactions in protein A-coated 96 wells plates through a colorimetric readout. Due to the easy detection of interactions this approach can be used for high-throughput screening and mapping of extracellular interaction networks.

Original languageEnglish
Title of host publicationMethods in Molecular Biology
EditorsS. Mukhtar
PublisherHumana Press
Pages193-204
Number of pages12
ISBN (Electronic)9781071633274
ISBN (Print)9781071633298, 9781071633267
DOIs
Publication statusPublished - 15 Jul 2023

Publication series

NameMethods in Molecular Biology
Volume2690
ISSN (Print)1064-3745
ISSN (Electronic)1940-6029

Keywords

  • ECDs
  • High-throughput screen
  • Interactome assay
  • Protein–protein interactions
  • Receptor kinases
  • S2 cell protein expression
  • Signaling

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