SimiRa: A tool to identify coregulation between microRNAs and RNA-binding proteins

Area of Science:

• Molecular Biology
• Genomics
• Bioinformatics

Background:

• MicroRNAs (miRNAs) and RNA-binding proteins (RBPs) are key post-transcriptional regulators cooperating in gene expression.
• Previous studies focused on direct target gene overlap, potentially missing broader functional cooperation.

Purpose of the Study:

• To develop a computational tool, simiRa, for comparing functional contexts of miRNAs and RBPs.
• To investigate miRNA-RBP cooperation beyond direct mRNA targeting.

Main Methods:

• Genome-wide comparison of miRNA and RBP target sets using CLIP-Seq data.
• Development of simiRa to analyze enriched functional categories (pathways, GO terms).
• Application of simiRa to known miRNA-RBP interactions and prediction of novel cooperations.

Main Results:

• RBPs exhibit distinct target sets and associate with gene interaction network hubs.
• Functional categories, not target genes, reflect cooperation between Pumilio proteins and miR-221/222 in p27 regulation.
• SimiRa predicts functional cooperation for nuclear RBP TAF15 with specific miRNAs.

Conclusions:

• SimiRa effectively identifies functional cooperation between miRNAs and RBPs based on shared biological pathways and functions.
• The tool highlights that miRNA-RBP cooperation can occur independently of direct target mRNA binding.
• SimiRa provides a valuable resource for exploring complex gene-regulatory networks.