期刊
FEBS LETTERS
卷 586, 期 24, 页码 4319-4325出版社
WILEY
DOI: 10.1016/j.febslet.2012.10.040
关键词
HuR; Egr-1; 3 ' UTR; Posttranscriptional regulation; Translation; T cell activation
资金
- National Natural Science Foundation of China [30570390, 30470381]
- Knowledge Innovation Program of the Chinese Academy of Sciences [KSCX2-YW-R-175]
- Chinese Academy of Sciences [2009S1-22]
- NIH [R01 CA052443]
- Institute of Health Sciences, Shanghai Institutes of Biological Sciences, Chinese Academy of Sciences
- Shanghai Commission of Science and Technology
T cell activation depends on appropriate and precise regulation of gene expression. Here we find that rapidly translocated RNA-binding protein HuR, forms messenger ribonucleoprotein ( mRNP) complexes with transiently expressed mRNAs encoding early-response transcription factors, including c-Fos, c-Jun, and Egr-1. Knockdown and overexpression assays demonstrated that proper post-transcriptional control of Egr-1 expression requires HuR-mediated translation control. Further analysis showed that the Egr-1 3'UTR, which contains AU-rich elements (AREs) and interacts directly with HuR, suppresses reporter gene expression and mediates posttranscriptional regulation of Egr-1 by HuR. These findings underscore an essential role for HuR in regulating early events during T cell activation. (C) 2012 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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