Physiological identification of human transcripts translationally regulated by a specific microRNA.

Abstract:

:One mechanism by which endogenous microRNAs (miRNAs) function is to suppress translation of target mRNAs. Computational identification of target mRNAs is hampered by the partial complementarity between miRNAs and their targets and the lack of in vivo approaches to identify targets. Here, we identify mRNAs that are regulated by specific endogenous miRNA by detecting shifts in individual mRNA abundance in polyribosome profiles following miRNA knockdown via siRNA. We have identified human genes whose mRNAs were found at significantly increased levels in the heavy polyribosome fractions following miRNA miR-30a-3p knockdown. If antibody was available, targets showed an increase in protein levels following the miRNA knockdown and a decrease following the miRNA overexpression. Although all identified transcripts have sequences that partially complement miR-30a-3p, none was identified by commonly used computational means. These data suggest that the functional interaction between miRNAs and mRNA targets is more complex than previously realized and describe an approach to refine predictive algorithms.

journal_name

Hum Mol Genet

journal_title

Human molecular genetics

authors

Nakamoto M,Jin P,O'Donnell WT,Warren ST

doi

10.1093/hmg/ddi397

subject

Has Abstract

pub_date

2005-12-15 00:00:00

pages

3813-21

issue

24

eissn

0964-6906

issn

1460-2083

pii

ddi397

journal_volume

14

pub_type

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