MicroRNAs (miRNAs) are short, 20–24 nucleotide noncoding RNAs that participate in post-transcriptional regulation of gene expression by affecting mRNA stability and translation in multicellular organisms. miRNAs are transcribed by RNA polymerase II as capped and polyadenylated primary transcripts (pri-miRNAs), which may be protein-coding or noncoding. Pri-miRNAs are cleaved by the RNase III enzyme Drosha to produce approximately 70-nucleotide stem-loop precursor miRNAs (pre-miRNAs), which are further processed by cytoplasmic Dicer to yield mature miRNA and antisense miRNA* products. The mature miRNA is incorporated into the RNA-induced silencing complex (RISC), where it recognizes target mRNAs through imperfect base pairing with the miRNA, most often leading to translational repression or destabilization of the target mRNA. This RefSeq represents the predicted microRNA stem-loop. Provided by RefSeq, September 2009.
Subcellular localization of MIR4284 (and its protein):
Gene Ontology (GO) terms for MIR4284:
| Disease | Score | NofPmids | NofSnps | Source |
| Invasive Carcinoma | 0.000271442 | 1 | 0 | BeFree |
| Pediatric ulcerative colitis | 0.000271442 | 1 | 0 | BeFree |
| Colitis | 0.000271442 | 1 | 0 | BeFree |
| Glioblastoma | 0.000271442 | 1 | 0 | BeFree |
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