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For example, the pre-miRNAs hsa-mir-194-1 and hsa-mir-194-2 lead to an identical mature miRNA (hsa-miR-194) but are from genes located in different genome regions. 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.
406947 n/a Ensembl ENSG00000283904 n/a UniProt n a n/a RefSeq (mRNA) n/a n/a RefSeq (protein) n/a n/a Location (UCSC) Chr 21: 25.57 – 25.57 Mb n/a PubMed search n/a Wikidata View/Edit Human MiR-155 is a microRNA that in humans is encoded by the MIR155 host gene or MIR155HG. MiR-155 plays a role in various physiological and pathological processes. [7] [8] [9] Exogenous molecular control in ...
[1] [2] These short hairpin introns formed via atypical miRNA biogenesis pathways. [ 3 ] [ 4 ] Mirtrons arise from the spliced-out introns and are known to function in gene expression. Mirtrons were first identified in Drosophila melanogaster and Caenorhabditis elegans .
Major proteins of RISC, Ago2, SND1, and AEG-1, act as crucial contributors to the gene silencing function of the complex. [ 16 ] RISC uses the guide strand of miRNA or siRNA to target complementary 3'-untranslated regions (3'UTR) of mRNA transcripts via Watson-Crick base pairing , allowing it to regulate gene expression of the mRNA transcript ...
MicroRNA sequencing (miRNA-seq), a type of RNA-Seq, is the use of next-generation sequencing or massively parallel high-throughput DNA sequencing to sequence microRNAs, also called miRNAs. miRNA-seq differs from other forms of RNA-seq in that input material is often enriched for small RNAs. miRNA-seq allows researchers to examine tissue-specific expression patterns, disease associations, and ...
Oncomir-1 has 2 paralogs, miR-106a-363 and mir-106b-25. These are located on different chromosomes and contain individual miRNAs that are highly similar to those encoded by the mir-17-92 cluster. [7] Mir-92-1 for example, appears on the mir-17-92 cluster and mir-92-2 appears on the mir-106a-363 cluster.
Each member of miR-125 family has two different variants of mature miRNAs - 5p and 3p. Both variants originate from the same pre-miRNA. MiR-125-5p variant generally shows higher expression compared to miR-125-3p. [6] In humans, miR-125 family is composed of three homologs: hsa-miR-125a, hsa-miR-125b-1 and hsa-miR-125b-2. [7]
The lethal-7 (let-7) gene was first discovered in the nematode C. elegans as a key developmental regulator and became one of the first two known microRNAs (the other one is lin-4). [8] Soon, let-7 was found in the fruit fly ( Drosophila) , and identified as the first known human miRNA by a BLAST (basic local alignment search tool) research. [ 9 ]