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  • Title: Visualization of interactions among bZIP and Rel family proteins in living cells using bimolecular fluorescence complementation.
    Author: Hu CD, Chinenov Y, Kerppola TK.
    Journal: Mol Cell; 2002 Apr; 9(4):789-98. PubMed ID: 11983170.
    Abstract:
    Networks of protein interactions coordinate cellular functions. We describe a bimolecular fluorescence complementation (BiFC) assay for determination of the locations of protein interactions in living cells. This approach is based on complementation between two nonfluorescent fragments of the yellow fluorescent protein (YFP) when they are brought together by interactions between proteins fused to each fragment. BiFC analysis was used to investigate interactions among bZIP and Rel family transcription factors. Regions outside the bZIP domains determined the locations of bZIP protein interactions. The subcellular sites of protein interactions were regulated by signaling. Cross-family interactions between bZIP and Rel proteins affected their subcellular localization and modulated transcription activation. These results attest to the general applicability of the BiFC assay for studies of protein interactions.
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