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Species of origin is designated with a three-letter prefix, e.g., hsa-miR-124 is a human (Homo sapiens) miRNA and oar-miR-124 is a sheep (Ovis aries) miRNA. Other common prefixes include "v" for viral (miRNA encoded by a viral genome) and "d" for Drosophila miRNA (a fruit fly commonly studied in genetic research).
let-7 was later identified in humans as the first human miRNA , and is highly conserved across many species. [3] [4] Dysregulation of let-7 contributes to cancer development in humans by preventing differentiation of cells, leaving them stuck in a stem-cell like state. [1] let-7 is therefore classified as a tumor suppressor.
miR-15a/16-1 deletion has been shown to accelerate the proliferation of both human and mouse B-cells through modulation of the expression of genes controlling cell cycle progression. [5] Studies have found the miR-15a/16-1 microRNA cluster to function as a tumour suppressor, with the oncogene BCL2 as its target. [ 6 ]
n/a Ensembl ENSG00000284357 n/a UniProt n a n/a RefSeq (mRNA) n/a n/a RefSeq (protein) n/a n/a Location (UCSC) Chr 1: 9.15 – 9.15 Mb n/a PubMed search n/a Wikidata View/Edit Human MicroRNA 34a (miR-34a) is a microRNA that in humans is encoded by the MIR34A gene. Function microRNAs (miRNAs) are short (20–24 nt) non-coding RNAs that are involved in post-transcriptional regulation of gene ...
n/a Ensembl ENSG00000207757 n/a UniProt n a n/a RefSeq (mRNA) n/a n/a RefSeq (protein) n/a n/a Location (UCSC) Chr 7: 100.09 – 100.09 Mb n/a PubMed search n/a Wikidata View/Edit Human MicroRNA 93 is a functional RNA and a microRNA that in humans is encoded by the MIR93 gene. Function The primary transcript is cleaved by the Drosha ribonuclease III enzyme to produce an approximately 70 ...
Function Distribution Ref. Antisense RNA: aRNA, asRNA: Transcriptional attenuation / mRNA degradation / mRNA stabilisation / Translation block: All organisms [11] [12] Cis-natural antisense transcript: cis-NAT Gene regulation: CRISPR RNA: crRNA: Resistance to parasites, by targeting their DNA: Bacteria and archaea [13] Long noncoding RNA: lncRNA
p53-deficient human gastric cancer cells, restoration of functional miR-34 inhibits cell growth and induces chemosensitization and apoptosis, indicating that miR-34 may restore p53 function. Restoration of miR-34 inhibits tumorsphere formation and growth, which is reported to be correlated to the self-renewal of cancer stem cells.
The human miR-16 precursor was discovered through detailed expression profile and Karyotype analyses of patients by Calin and colleagues. [1] Karyotyping of chromosome structures from individuals with B-cell chronic lymphocytic leukaemias (B-CLL) found that more than half have alterations in the 13q14 region.