ArticleNature communications2026
14-3-3ζ interacts with DNA-binding domain of FOXO3a and competitively dissociates DNA by dual-motif tethering.
Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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12 authors.
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Abstract
In cancer cells, Ras protein mutations activate a signaling cascade that phosphorylates kinases, transcription, and translation factors, driving cancer cell proliferation. One such factor, FOXO3a, promotes apoptosis-related gene transcription. However, in many cancer cells, FOXO3a is phosphorylated and is bound to 14-3-3ζ at phosphorylation sites. The 14-3-3ζ binding displaces phosphorylated FOXO3a from DNA, suppressing apoptosis. Since the phosphorylation sites are far from the DNA-binding domain (DBD) of FOXO3a, the mechanism of displacement remains unclear. Using isothermal titration calorimetry and fluorescence-detection size-exclusion chromatography, we find that 14-3-3ζ strongly displaces DNA from di-phosphorylated FOXO3a (dpFOXO3a), despite similar dissociation constants for dpFOXO3a-14-3-3ζ and dpFOXO3a-DNA. Nuclear magnetic resonance data identify weak, but direct binding of 14-3-3ζ to the DBD, suggesting direct competition. These findings suggest that 14-3-3ζ enhances its competitive ability by dual tethering to the DBD of FOXO3a via phosphorylation sites, effectively displacing DNA.
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