mRNA poly(A)-tail changes specified by deadenylation broadly reshape translation in Drosophila oocytes and early embryos
Name
Eichhorn-2016-mRNA poly(A)-tail ch.pdf
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Author(s)
Eichhorn, Stephen William
Subtelny, Alexander Orest
Orr-Weaver, Terry
Bartel, David
Kronja, Iva
Kwasnieski, Jamie C.
Date Issued
July 2016
Journal
eLife
Publisher
eLife Sciences Publications, Ltd.
Citation
Eichhorn, Stephen W et al. “mRNA poly(A)-Tail Changes Specified by Deadenylation Broadly Reshape Translation in Drosophila Oocytes and Early Embryos.” eLife 5 (2016): n. pag.
Version
Final published version
Abstract
Because maturing oocytes and early embryos lack appreciable transcription, posttranscriptional regulatory processes control their development. To better understand this control, we profiled translational efficiencies and poly(A)-tail lengths throughout Drosophila oocyte maturation and early embryonic development. The correspondence between translational-efficiency changes and tail-length changes indicated that tail-length changes broadly regulate translation until gastrulation, when this coupling disappears. During egg activation, relative changes in poly(A)-tail length, and thus translational efficiency, were largely retained in the absence of cytoplasmic polyadenylation, which indicated that selective poly(A)-tail shortening primarily specifies these changes. Many translational changes depended on PAN GU and Smaug, and these changes were largely attributable to tail-length changes. Our results also revealed the presence of tail-length–independent mechanisms that maintained translation despite tail-length shortening during oocyte maturation, and prevented essentially all translation of bicoid and several other mRNAs before egg activation. In addition to these fundamental insights, our results provide valuable resources for future studies.
MIT Department
Harvard University--MIT Division of Health Sciences and Technology
Massachusetts Institute of Technology. Department of Biology
Whitehead Institute for Biomedical Research
Terms of Use
Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.7554/eLife.16955
