Experimental Support 1 for Functional miRNA-Target Interaction
miRNA:Target
----
Validation Method
Conditions
CD4+ T cells (C57BL/6)
Disease
MIMAT0020622
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 GSM1013576. RNA binding protein: AGO2. Condition:CD4+ T cells
"HITS-CLIP data was present in GSM1013581. RNA binding protein: AGO2. Condition:CD4+ T cells
"HITS-CLIP data was present in GSM1013584. RNA binding protein: AGO2. Condition:CD4+ T cells
"HITS-CLIP data was present in GSM1013585. RNA binding protein: AGO2. Condition:CD4+ T cells
"HITS-CLIP data was present in GSM1013594. RNA binding protein: AGO2. Condition:CD4+ T cells
"HITS-CLIP data was present in GSM1013595. RNA binding protein: AGO2. Condition:CD4+ T cells
"HITS-CLIP data was present in GSM1013598. RNA binding protein: AGO2. Condition:CD4+ T cells
...
MicroRNAs (miRNAs) are essential components of gene regulation, but identification of miRNA targets remains a major challenge. Most target prediction and discovery relies on perfect complementarity of the miRNA seed to the 3' untranslated region (UTR). However, it is unclear to what extent miRNAs target sites without seed matches. Here, we performed a transcriptome-wide identification of the endogenous targets of a single miRNA-miR-155-in a genetically controlled manner. We found that approximately 40% of miR-155-dependent Argonaute binding occurs at sites without perfect seed matches. The majority of these noncanonical sites feature extensive complementarity to the miRNA seed with one mismatch. These noncanonical sites confer regulation of gene expression, albeit less potently than canonical sites. Thus, noncanonical miRNA binding sites are widespread, often contain seed-like motifs, and can regulate gene expression, generating a continuum of targeting and regulation.
