Staufen1 regulates diverse classes of mammalian transcripts.
It is currently unknown how extensively the double-stranded RNA-binding protein Staufen (Stau)1 is utilized by mammalian cells to regulate gene expression. To date, Stau1 binding to the 3'-untranslated region (3'-UTR) of ADP ribosylation factor (ARF)1 mRNA has been shown to target ARF1 mRNA for Stau1-mediated mRNA decay (SMD). ARF1 SMD depends on translation and recruitment of the nonsense-mediated mRNA decay factor Upf1 to the ARF1 3'-UTR by Stau1. Here, we demonstrate that Stau1 binds to a complex structure within the ARF1 3'-UTR. We also use microarrays to show that 1.1 and 1.0% of the 11 569 HeLa-cell transcripts that were analyzed are upregulated and downregulated, respectively, at least two-fold upon Stau1 depletion in three independently performed experiments. We localize the Stau1 binding site to the 3'-UTR of four mRNAs that we define as natural SMD targets. Additionally, we provide evidence that the efficiency of SMD increases during the differentiation of C2C12 myoblasts to myotubes. We propose that Stau1 influences the expression of a wide variety of physiologic transcripts and metabolic pathways.
Kim
Yoon Ki
YK
Department of Biochemistry and Biophysics, School of Medicine and Dentistry, University of Rochester, Rochester, NY 14642, USA.
Furic
Luc
L
Parisien
Marc
M
Major
François
F
DesGroseillers
Luc
L
Maquat
Lynne E
LE
D020413:3' Untranslated Regions / Q000378:metabolism*; D020823:ADP-Ribosylation Factor 1 / Q000378:metabolism*; D020029:Base Pairing; D001483:Base Sequence; D015153:Blotting, Western; D019295:Computational Biology; D003598:Cytoskeletal Proteins / Q000378:metabolism*; D017931:DNA Primers / Q000235:genetics; D005786:Gene Expression Regulation / Q000235:genetics*; D006367:HeLa Cells; D006801:Humans; D018613:Microscopy, Confocal; D008969:Molecular Sequence Data; D017395:Plasminogen Activator Inhibitor 1 / Q000378:metabolism; D040081:Protein Array Analysis; D011485:Protein Binding; D016755:Proto-Oncogene Proteins c-jun / Q000378:metabolism; D020871:RNA Stability / Q000235:genetics / Q000502:physiology*; D016601:RNA-Binding Proteins / Q000378:metabolism*; D020395:Receptors, Interleukin-7 / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction
D020413:3' Untranslated Regions; D003598:Cytoskeletal Proteins; D017931:DNA Primers; D017395:Plasminogen Activator Inhibitor 1; D016755:Proto-Oncogene Proteins c-jun; D016601:RNA-Binding Proteins; D020395:Receptors, Interleukin-7; C051321:SERPINE1 protein, human; C492185:STAU1 protein, human; D020823:ADP-Ribosylation Factor 1