MIR222
Identifiers
Aliases	MIR222, MIRN222, miRNA222, mir-222, microRNA 222
External IDs	OMIM: 300569 GeneCards: MIR222
Gene location (Human) Chr. X chromosome (human)[1] Band Xp11.3 Start 45,747,015 bp[1] End 45,747,124 bp[1]
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in islet of Langerhans placenta monocyte bone marrow blood kidney gastrocnemius muscle ascending aorta lymph node left ventricle n/a More reference expression data BioGPS n/a
Orthologs Species Human Mouse Entrez 407007 n/a Ensembl ENSG00000207725 n/a UniProt n a n/a RefSeq (mRNA) n/a n/a RefSeq (protein) n/a n/a Location (UCSC) Chr X: 45.75 – 45.75 Mb n/a PubMed search [2] n/a
Wikidata
View/Edit Human

MicroRNA 222 is a MicroRNA that in humans is encoded by the MIR222 gene, and is a known extracellular RNA (exRNA).^[3]

Function

microRNAs (miRNAs) are short (20-24 nt) non-coding RNAs that are involved in post-transcriptional regulation of gene expression in multicellular organisms by affecting both the stability and translation of mRNAs. miRNAs are transcribed by RNA polymerase II as part of capped and polyadenylated primary transcripts (pri-miRNAs) that can be either protein-coding or non-coding.

The primary transcript is cleaved by the Drosha ribonuclease III enzyme to produce an approximately 70-nt stem-loop precursor miRNA (pre-miRNA), which is further cleaved by the cytoplasmic Dicer ribonuclease to generate the mature miRNA and antisense miRNA star (miRNA*) products.

The mature miRNA is incorporated into a RNA-induced silencing complex (RISC), which recognizes target mRNAs through imperfect base pairing with the miRNA and most commonly results in translational inhibition or destabilization of the target mRNA. The RefSeq represents the predicted microRNA stem-loop.