Experimental Support 1 for Functional miRNA-Target Interaction
miRNA:Target
----
Validation Method
Conditions
C2C12
Location of target site
3'UTR
Tools used in this research
TargetScan
,
miRTarCLIP
,
Piranha
Original Description (Extracted from the article)
...
HITS-CLIP data was present in GSM1385342. RNA binding protein: 聽AGO2. Condition:C2C12_GM_Ago2_CLIP-Seq_myoblast
HITS-CLIP data was present in GSM1385343. RNA binding protein: 聽AGO2. Condition:C2C12_DM_Ago2_CLIP-Seq_myotubes
...
- Zhang X; Zuo X; Yang B; Li Z; Xue Y; Zhou et al., 2014,
Cell.
- Zhang X; Zuo X; Yang B; Li Z; Xue Y; Zhou et al.
- Cell, 2014
MicroRNAs are well known to mediate translational repression and mRNA degradation in the cytoplasm. Various microRNAs have also been detected in membrane-compartmentalized organelles, but the functional significance has remained elusive. Here, we report that miR-1, a microRNA specifically induced during myogenesis, efficiently enters the mitochondria where it unexpectedly stimulates, rather than represses, the translation of specific mitochondrial genome-encoded transcripts. We show that this positive effect requires specific miR:mRNA base-pairing and Ago2, but not its functional partner GW182, which is excluded from the mitochondria. We provide evidence for the direct action of Ago2 in mitochondrial translation by crosslinking immunoprecipitation coupled with deep sequencing (CLIP-seq), functional rescue with mitochondria-targeted Ago2, and selective inhibition of the microRNA machinery in the cytoplasm. These findings unveil a positive function of microRNA in mitochondrial translation and suggest a highly coordinated myogenic program via miR-1-mediated translational stimulation in the mitochondria and repression in the cytoplasm.
