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- W2023578257 abstract "In the lactating breast, ERBB4 localizes to the nuclei of secretory epithelium while regulating activities of the signal transducer and activator of transcription (STAT) 5A transcription factor essential for milk-gene expression. We have identified an intrinsic ERBB4 NLS (residues 676-684) within the ERBB4 intracellular domain (4ICD) that is essential for nuclear accumulation of 4ICD. To determine the functional significance of 4ICD nuclear translocation in a physiologically relevant system, we have demonstrated that cotransfection of ERBB4 and STAT5A in a human breast cancer cell line stimulates beta-casein promoter activity. Significantly, nuclear localization of STAT5A and subsequent stimulation of the beta-casein promoter requires nuclear translocation of 4ICD. Moreover, 4ICD and STAT5A colocalize within nuclei of heregulin beta 1 (HRG)-stimulated cells and both proteins bind to the endogenous beta-casein promoter in T47D breast cancer cells. Together, our results establish a novel molecular mechanism of transmembrane receptor signal transduction involving nuclear cotranslocation of the receptor intracellular domain and associated transcription factor. Subsequent binding of the two proteins at transcription factor target promoters results in activation of gene expression." @default.
- W2023578257 created "2016-06-24" @default.
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- W2023578257 date "2004-11-08" @default.
- W2023578257 modified "2023-10-16" @default.
- W2023578257 title "The ERBB4/HER4 receptor tyrosine kinase regulates gene expression by functioning as a STAT5A nuclear chaperone" @default.
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- W2023578257 doi "https://doi.org/10.1083/jcb.200403155" @default.
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