Abstract
In plants, a lot of transcription factors fulfill their roles in gene regulation through the interaction with other regulatory proteins and co-factors. Thus, confirmation of protein-protein interaction is key to understand the precise function of transcription factors. Many methods have been developed to investigate the protein-protein interaction in vivo and in vitro. In situ Proximity Ligation Assay (PLA) is an innovative method to test protein-protein interaction in your tissues or cells of interest in vivo. Furthermore, this method allows us to detect transient interaction and low-abundance protein interaction with single molecule resolution. In this chapter, we describe a detailed protocol for the study of interaction between plant transcription factors and other regulatory proteins, in the scale of single nuclei of plant organ, tissues and cells.
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