한빛사논문
Sunkyung Choi1,†, Hyo Seong Lee1,†, Namjoon Cho1,†, Inyoung Kim1, Seongmin Cheon2,3, Chungoo Park2, Eun-Mi Kim4,*, Wantae Kim1,* and Kee K. Kim1,*
1Department of Biochemistry, College of Natural Sciences, Chungnam National University, Daejeon 34134, Republic of Korea, 2School of Biological Sciences and Technology, Chonnam National University, Gwangju 61186, Republic of Korea, 3Proteomics Core Facility, Biomedical Research Institute, Seoul National University Hospital, Seoul 03080, Republic of Korea and 4Department of Predictive Toxicology, Korea Institute of Toxicology, Daejeon, 34114, Republic of Korea
†The authors wish it to be known that, in their opinion, the first three authors should be regarded as Joint First Authors.
*Corresponding author.
Abstract
Alternative pre-mRNA splicing is key to proteome diversity; however, the biological roles of alternative splicing (AS) in signaling pathways remain elusive. Here, we focus on TEA domain transcription factor 1 (TEAD1), a YAP binding factor in the Hippo signaling pathway. Public database analyses showed that expression of YAP-TEAD target genes negatively correlated with the expression of a TEAD1 isoform lacking exon 6 (TEAD1ΔE6) but did not correlate with overall TEAD1 expression. We confirmed that the transcriptional activity and oncogenic properties of the full-length TEAD1 isoform were greater than those of TEAD1ΔE6, with the difference in transcription related to YAP interaction. Furthermore, we showed that RNA-binding Fox-1 homolog 2 (RBFOX2) promoted the inclusion of TEAD1 exon 6 via binding to the conserved GCAUG element in the downstream intron. These results suggest a regulatory mechanism of RBFOX2-mediated TEAD1 AS and provide insight into AS-specific modulation of signaling pathways.
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