Abstract:
:The turnover of messenger RNAs (mRNAs) is a key regulatory step of gene expression in eukaryotic cells. Due to the complexity of the mammalian degradation machinery, the contribution of decay factors to the directionality of mRNA decay is poorly understood. Here we characterize a molecular tool to interrogate mRNA turnover via the detection of XRN1-resistant decay fragments (xrFrag). Using nonsense-mediated mRNA decay (NMD) as a model pathway, we establish xrFrag analysis as a robust indicator of accelerated 5'-3' mRNA decay. In tethering assays, monitoring xrFrag accumulation allows to distinguish decapping and endocleavage activities from deadenylation. Moreover, xrFrag analysis of mRNA degradation induced by miRNAs, AU-rich elements (AREs) as well as the 3' UTRs of cytokine mRNAs reveals the contribution of 5'-3' decay and endonucleolytic cleavage. Our work uncovers formerly unrecognized modes of mRNA turnover and establishes xrFrag as a powerful tool for RNA decay analyses.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Boehm V,Gerbracht JV,Marx MC,Gehring NHdoi
10.1038/ncomms13691subject
Has Abstractpub_date
2016-12-05 00:00:00pages
13691issn
2041-1723pii
ncomms13691journal_volume
7pub_type
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