Functional Association of Nmi with Stat5 and Stat1 in IL-2- and IFN γ-Mediated Signaling


Using the coiled-coil region of Stat5b as the bait in a yeast two-hybrid screen, we identified the association of Nmi, a protein of unknown function previously reported as an N-Myc interactor. We further show that Nmi interacts with all STATs except Stat2. We evaluated two cytokine systems, IL-2 and IFNgamma, and demonstrate that Nmi augments STAT-mediated transcription in response to these cytokines. Interestingly, Nmi lacks an intrinsic transcriptional activation domain; instead, Nmi enhances the association of CBP/p300 coactivator proteins with Stat1 and Stat5, and together with CBP/p300 can augment IL-2- and IFNgamma-dependent transcription. Therefore, our data not only reveal that Nmi can potentiate STAT-dependent transcription, but also suggest that it can augment coactivator protein recruitment to at least some members of a group of sequence-specific transcription factors.

DOI: 10.1016/S0092-8674(00)80965-4

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@article{Zhu1999FunctionalAO, title={Functional Association of Nmi with Stat5 and Stat1 in IL-2- and IFN γ-Mediated Signaling}, author={Minghua Zhu and Susan D. John and Maria L. Berg and Warren J Leonard}, journal={Cell}, year={1999}, volume={96}, pages={121-130} }