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Zebrafish MiR-430 Promotes Deadenylation and Clearance of Maternal mRNAs
Antonio J. Giraldez,1,2*Yuichiro Mishima,3Jason Rihel,1,2Russell J. Grocock,4Stijn Van Dongen,4Kunio Inoue,3Anton J. Enright,4Alexander F. Schier1,2*
MicroRNAs (miRNAs) comprise 1 to 3% of all vertebrate genes,but their in vivo functions and mechanisms of action remainlargely unknown. Zebrafish miR-430 is expressed at the onsetof zygotic transcription and regulates morphogenesis duringearly development. By using a microarray approach and in vivotarget validation, we find that miR-430 directly regulates severalhundred target messenger RNA molecules (mRNAs). Most targetsare maternally expressed mRNAs that accumulate in the absenceof miR-430. We also show that miR-430 accelerates the deadenylationof target mRNAs. These results suggest that miR-430 facilitatesthe deadenylation and clearance of maternal mRNAs during earlyembryogenesis.
1 Developmental Genetics Program, Skirball Institute of Biomolecular Medicine, and Department of Cell Biology, New York University School of Medicine, New York, NY 10016, USA. 2 Department of Molecular and Cellular Biology, Harvard University, 16 Divinity Avenue, Cambridge, MA 02138, USA. 3 Department of Biology, Graduate School of Science and Technology, Kobe University, 1-1 Rokkodaicho, Nadaku, Kobe 657-8501, Japan. 4 Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK.
* To whom correspondence should be addressed. E-mail: schier{at}fas.harvard.edu (A.F.S.); giraldez{at}mcb.harvard.edu (A.J.G.)
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[DOI: 10.1126/science.1126400] |Summary »|Full Text »|PDF »
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