miRNA binding site in mRNA 3′ untranslated region

miRNA binding sites in mRNA 3′ untranslated regions (3′UTRs) are short, sequence-specific regions in the non-coding tail of messenger RNA molecules that serve as primary recognition elements for microRNAs (miRNAs)[1][2][3][6][7]. The binding of mature miRNAs to these sites guides RNA-induced silencing complexes (RISCs) to repress translation or promote the degradation of the target mRNA, thus regulating gene expression post-transcriptionally[1][2][6][7]. Functional miRNA binding sites are distributed non-randomly in 3′UTRs, often in clusters, and their effectiveness can depend on sequence context, local RNA structure, number of sites, proximity to coding region/poly(A) tail, and competition or cooperation with other RNA-binding proteins[2][3][4][5]. While crucial for normal physiology, dysregulation of these sites through mutation or altered miRNA expression can contribute to diseases such as cancer, neurodegenerative, and cardiovascular disorders[5][7]. These sites are considered regulatory RNA sequence elements, not druggable targets or conventional therapeutic targets such as receptors or enzymes. Key clarifications: - Not a target as classically defined: miRNA binding sites are regulatory elements within mRNA, not discrete molecules (proteins, receptors) or drug targets. Thus, “is_target” is false. - Is_incorrect is true: This is not a molecule/receptor or standard target but a functional nucleic acid sequence element. - No direct drugs or biomarkers: They may be relevant for disease association studies or RNA-therapeutic strategies but are not individually targeted by approved drugs.

Other names

miRNA–mRNA interaction sitemicroRNA response element (MRE)miRNA-binding element in 3′ UTRmicroRNA recognition site in 3′ UTR

NA (binding site itself is not directly targeted by drugs, but may be indirectly altered by strategies such as antisense oligonucleotides or miRNA-based therapeutics)