期刊
RNA BIOLOGY
卷 13, 期 6, 页码 569-581出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/15476286.2016.1176663
关键词
Alternative splicing; CELF2; CLIP-Seq; LEF1; MKK7; RNA map
资金
- National Institutes of Health [R01GM103383, F31GM103255]
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [R35GM118048, R01GM103383] Funding Source: NIH RePORTER
CELF2 is an RNA binding protein that has been implicated in developmental and signal-dependent splicing in the heart, brain and T cells. In the heart, CELF2 expression decreases during development, while in T cells CELF2 expression increases both during development and in response to antigen-induced signaling events. Although hundreds of CELF2-responsive splicing events have been identified in both heart and T cells, the way in which CELF2 functions has not been broadly investigated. Here we use CLIP-Seq to identified physical targets of CELF2 in a cultured human T cell line. By comparing the results with known functional targets of CELF2 splicing regulation from the same cell line we demonstrate a generalizable position-dependence of CELF2 activity that is consistent with previous mechanistic studies of individual CELF2 target genes in heart and brain. Strikingly, this general position-dependence is sufficient to explain the bi-directional activity of CELF2 on 2 T cell targets recently reported. Therefore, we propose that the location of CELF2 binding around an exon is a primary predictor of CELF2 function in a broad range of cellular contexts.
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