Abstract：
:MicroRNAs (miRNAs) are endogenous approximately 22-nucleotide RNAs that mediate important gene-regulatory events by pairing to the mRNAs of protein-coding genes to direct their repression. Repression of these regulatory targets leads to decreased translational efficiency and/or decreased mRNA levels, but the relative contributions of these two outcomes have been largely unknown, particularly for endogenous targets expressed at low-to-moderate levels. Here, we use ribosome profiling to measure the overall effects on protein production and compare these to simultaneously measured effects on mRNA levels. For both ectopic and endogenous miRNA regulatory interactions, lowered mRNA levels account for most (>/=84%) of the decreased protein production. These results show that changes in mRNA levels closely reflect the impact of miRNAs on gene expression and indicate that destabilization of target mRNAs is the predominant reason for reduced protein output.
journal_name
Naturejournal_title
Natureauthors
Guo H,Ingolia NT,Weissman JS,Bartel DPdoi
10.1038/nature09267subject
Has Abstractpub_date
2010-08-12 00:00:00pages
835-40issue
7308eissn
0028-0836issn
1476-4687pii
nature09267journal_volume
466pub_type
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