MicroRNAs (miRNAs) are short (20–24 nucleotide) noncoding RNAs that post-transcriptionally regulate gene expression in multicellular organisms by affecting mRNA stability and translation. They are transcribed by RNA polymerase II as parts of 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 an approximately 70-nucleotide stem-loop precursor miRNA (pre-miRNA), which is further processed by cytoplasmic Dicer to yield mature miRNA and antisense miRNA star (miRNA*) products. The mature miRNA is incorporated into the RNA-induced silencing complex (RISC), which recognizes target mRNAs through imperfect base pairing and most often leads to translational repression or destabilization of the target mRNA. RefSeq represents the predicted microRNA stem-loop. [Provided by RefSeq, Sep 2009]
Subcellular localization of MIR126 (and its protein):
Gene Ontology (GO) terms for MIR126:
| Disease | Score | NofPmids | NofSnps | Source |
| Non-Small Cell Lung Carcinoma | 0.122714419 | 11 | 0 | BeFree_CTD_human |
| Malignant mesothelioma | 0.120814326 | 3 | 0 | BeFree_CTD_human |
| Mammary Neoplasms | 0.120542884 | 3 | 0 | BeFree_CTD_human |
| Myocardial Reperfusion Injury | 0.12 | 1 | 0 | CTD_human |
| Neoplasm Metastasis | 0.004614512 | 17 | 0 | BeFree |
| Lung Neoplasms | 0.002995792 | 2 | 0 | BeFree_LHGDN |
| Colorectal Cancer | 0.002171535 | 8 | 0 | BeFree |
| Colorectal Carcinoma | 0.001900093 | 7 | 0 | BeFree |
| Stomach Carcinoma | 0.001900093 | 7 | 0 | BeFree |
| Malignant neoplasm of breast | 0.001900093 | 7 | 0 | BeFree |
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