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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Wei, Gang Gao, Yayi Li, Bin Li, Zhiyuan Li, Yangyang Han, Zhijun Yao, Zhengju Gao, Zhimei Lin, Fang Tsun, Andy Wang, Yan |
| Description | Author Affiliation: Li Y ( Key Laboratory of Molecular Virology and Immunology, Unit of Molecular Immunology, Institut Pasteur of Shanghai, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 411 Hefei Road, Shanghai 200025, China.) |
| Abstract | The abundant expression of IFNγ in Th-inducing POK (ThPOK)-deficient CD4(+) T cells requires the activation of Eomesodermin (Eomes); however, the underlying mechanism of this phenomenon remains unclear. Here we report that ThPOK binds directly to the promoter region of the Eomes gene to repress its expression in CD4(+) T cells. We identified the histone acetyltransferase TIP60 as a co-repressor of ThPOK-target genes, where ectopically expressed TIP60 increased ThPOK protein stability by promoting its acetylation at its Lys(360) residue to then augment the transcriptional repression of Eomes. Moreover, knockdown of endogenous TIP60 abolished the stabilization of ThPOK in CD4(+) T cells, which led to the transcriptional activation of Eomes and increased production of IFNγ. Our results reveal a novel pathway by which TIP60 and ThPOK synergistically suppresses Eomes function and IFNγ production, which could contribute to the regulation of inflammation. |
| ISSN | 00219258 |
| e-ISSN | 1083351X |
| Journal | Journal of Biological Chemistry |
| Issue Number | 22 |
| Volume Number | 288 |
| Language | English |
| Publisher | American Society for Biochemistry and Molecular Biology (United States) |
| Publisher Date | 2013-05-31 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | CD4-Positive T-Lymphocytes Metabolism DNA-Binding Proteins Gene Expression Regulation Immunology Histone Acetyltransferases Repressor Proteins T-Box Domain Proteins Transcription Factors Acetylation Cytology Genetics HEK293 Cells Inflammation Interferon-gamma Biosynthesis Promoter Regions, Genetic Protein Stability Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Biochemistry Molecular Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Biochemistry Molecular Biology |
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