Poly (C)-binding protein 1 regulates p63 expression through mRNA stability.
p63, a transcription factor and p53 family protein, plays a crucial role in tumor suppression and development of various epithelial tissues. While p63 expression is controlled mostly by post-translational modifications, recent studies indicate that transcriptional and posttranscriptional regulations are essential for proper p63 expression. Here, we investigated the regulation of p63 expression by poly (C)-binding protein 1 (PCBP1, also known as hnRNP-E1 and αCP1). We found that knockdown of PCBP1 decreases the level of p63 transcript and protein. We also found that PCBP1 regulates the stability of p63 mRNA via binding to p63 3'UTR. Additionally, we found that a CU-rich element (CUE) in p63 3'UTR is bound by and responsive to PCBP1. Together, we conclude that PCBP1 regulates p63 expression via mRNA stability.
Comparative Oncology Laboratory, School of Veterinary Medicine, University of California Davis, Davis, California, United States of America.
Seong-Jun
SJ
Cho
Yong-Sam
YS
Jung
Xinbin
X
Chen
D020413:3' Untranslated Regions; D001483:Base Sequence; D004268:DNA-Binding Proteins; D005786:Gene Expression Regulation; D034441:Heterogeneous-Nuclear Ribonucleoproteins / Q000502:physiology*; D006801:Humans; D061986:MCF-7 Cells; D011485:Protein Binding; D020871:RNA Stability; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism*; D016601:RNA-Binding Proteins; D038621:Regulatory Sequences, Ribonucleic Acid; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*; D025521:Tumor Suppressor Proteins / Q000235:genetics / Q000378:metabolism*
D020413:3' Untranslated Regions; D004268:DNA-Binding Proteins; D034441:Heterogeneous-Nuclear Ribonucleoproteins; C094604:PCBP1 protein, human; D012333:RNA, Messenger; D016601:RNA-Binding Proteins; D038621:Regulatory Sequences, Ribonucleic Acid; C115051:TP63 protein, human; D014157:Transcription Factors; D025521:Tumor Suppressor Proteins