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XB-ART-48919
Nature. April 3, 2014; 508 (7494): 66-71.

Poly(A)-tail profiling reveals an embryonic switch in translational control.

Subtelny AO , Eichhorn SW , Chen GR , Sive H , Bartel DP .


Abstract
Poly(A) tails enhance the stability and translation of most eukaryotic messenger RNAs, but difficulties in globally measuring poly(A)-tail lengths have impeded greater understanding of poly(A)-tail function. Here we describe poly(A)-tail length profiling by sequencing (PAL-seq) and apply it to measure tail lengths of millions of individual RNAs isolated from yeasts, cell lines, Arabidopsis thaliana leaves, mouse liver, and zebrafish and frog embryos. Poly(A)-tail lengths were conserved between orthologous mRNAs, with mRNAs encoding ribosomal proteins and other ''housekeeping'' proteins tending to have shorter tails. As expected, tail lengths were coupled to translational efficiencies in early zebrafish and frog embryos. However, this strong coupling diminished at gastrulation and was absent in non-embryonic samples, indicating a rapid developmental switch in the nature of translational control. This switch complements an earlier switch to zygotic transcriptional control and explains why the predominant effect of microRNA-mediated deadenylation concurrently shifts from translational repression to mRNA destabilization.

PubMed ID: 24476825
PMC ID: PMC4086860
Article link: Nature.
Grant support: GM067031 NIGMS NIH HHS , R01 GM067031 NIGMS NIH HHS , T32 GM007753 NIGMS NIH HHS , T32GM007753 NIGMS NIH HHSHoward Hughes Medical Institute , T32 GM007287 NIGMS NIH HHS , T32 GM007753 NIGMS NIH HHSHoward Hughes Medical Institute , T32GM007753 NIGMS NIH HHS , R01 GM067031 NIGMS NIH HHS , GM067031 NIGMS NIH HHS

Genes referenced: ddx24 pam tes


References:
Aanes, 2011, Pubmed[+]


Article Images: [+] show captions

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