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Homo-FRET Imaging to Study Protein–Protein Interaction and Complex Formation in Plants

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Plant Synthetic Biology

Part of the book series: Methods in Molecular Biology ((MIMB,volume 2379))

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Protein–protein interactions in living plant cells can be measured by changes in fluorescence anisotropy due to homo-FRET (Förster Resonance Energy Transfer). Here, the energy transfer between identical fluorophores, e.g., enhanced green fluorescent protein (EGFP) fused to a protein of interest, serves as a read-out for protein interaction and clustering. By applying homo-FRET imaging, not only dimeric complexes, but also bigger homomeric complex formation can be followed in vivo at high spatial and temporal resolution. Therefore, this method provides a powerful tool to investigate changes in complex formation over time in their natural environment with high precision at a subcellular level. Here, we describe the necessary theoretical background and how homo-FRET imaging is practically carried out. We also discuss potential pitfalls and points of consideration.

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We acknowledge the Deutsche Forschungsgemeinschaft (DFG) for financial support to Y.S. by grant STA12/12 1-1 and S.W.P by grant WE53/43 1-1. We are thankful to Jelle Ludolf Postma and Sebastian Hänsch for critical reading of the manuscript.

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Correspondence to Stefanie Weidtkamp-Peters or Yvonne Stahl .

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Weidtkamp-Peters, S., Rehwald, S., Stahl, Y. (2022). Homo-FRET Imaging to Study Protein–Protein Interaction and Complex Formation in Plants. In: Zurbriggen, M.D. (eds) Plant Synthetic Biology. Methods in Molecular Biology, vol 2379. Humana, New York, NY.

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  • Publisher Name: Humana, New York, NY

  • Print ISBN: 978-1-0716-1790-8

  • Online ISBN: 978-1-0716-1791-5

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