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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.
miRNA: Gene regulation: Most eukaryotes [14] Piwi-interacting RNA: piRNA: Transposon defense, maybe other functions: Most animals [15] [16] Small interfering RNA: siRNA: Gene regulation: Most eukaryotes [17] Short hairpin RNA: shRNA: Gene regulation: Most eukaryotes [18] Trans-acting siRNA: tasiRNA: Gene regulation: Land plants [19] Repeat ...
A database of inverse miRNA target predictions, based on the RepTar algorithm that is independent of evolutionary conservation considerations and is not limited to seed pairing sites. database: website [17] RNA22: The first link (predictions) provides RNA22 predictions for all protein coding transcripts in human, mouse, roundworm, and fruit fly.
miR-27 is a family of microRNA precursors found in animals, including humans. [1] MicroRNAs are typically transcribed as ~70 nucleotide precursors and subsequently processed by the Dicer enzyme to give a ~22 nucleotide product. [2] The excised region or, mature product, of the miR-27 precursor is the microRNA mir-27.
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.
miR-144 is a family of microRNA precursors found in mammals, including humans. The ~22 nucleotide mature miRNA sequence is excised from the precursor hairpin by the enzyme Dicer . [ 1 ] In humans, miR-144 has been characterised as a "common miRNA signature" [ 2 ] of a number of different tumours .
Ruvkun discovered the mechanism by which lin-4, the first microRNA (miRNA) discovered by Victor Ambros, regulates the translation of target messenger RNAs via imperfect base-pairing to those targets, and discovered the second miRNA, let-7, and that it is conserved across animal phylogeny, including in humans. These miRNA discoveries revealed a ...