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GATA-binding protein-3 regulates T helper type 2 cytokine and ifng loci through interaction with
Soo Seok Hwang1, Sumin Lee, Wonyong Lee
1Department of Life Science, Sogang University, Seoul, Korea.
Abstract:
GATA-binding protein-3 (GATA-3) regulates the T helper type 2 (Th2) cytokine locus through induction of chromatin remodelling. However, the molecular mechanism for this is poorly understood. To understand this mechanism better, we screened GATA-3 interacting proteins using affinity purification and mass spectrometry. We found that GATA-3 bound to metastasis-associated protein 2 (MTA-2), a component of the NuRD chromatin remodelling complex. GATA-3 and MTA-2 in turn bound to several regulatory regions of the Th2 cytokine locus and the ifng promoter. Cell transfection assay showed that MTA-2 acted as an antagonist with GATA-3 in the expression of Th2 cytokines, but co-operated with GATA-3 in the repression of the ifng gene expression. These results suggest that GATA-3 interacts with MTA-2 to co-ordinately regulate Th2 cytokine and ifng loci during T helper cell differentiation.
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