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The double-stranded RNA (dsRNA) structure of the hairpins in a pri-miRNA is recognized by a nuclear protein known as DiGeorge Syndrome Critical Region 8 (DGCR8 or "Pasha" in invertebrates), named for its association with DiGeorge Syndrome. DGCR8 associates with the enzyme Drosha, a protein that cuts RNA, to form the Microprocessor complex.
The Let-7 microRNA precursor gives rise to let-7, a microRNA (miRNA) involved in control of stem-cell division and differentiation. [ 1 ] let-7 , short for "lethal-7", was discovered along with the miRNA lin-4 in a study of developmental timing in C. elegans , [ 2 ] making these miRNAs the first ever discovered.
The RISC-loading complex (RLC) is the essential structure required to load dsRNA fragments into RISC in order to target mRNA. The RLC consists of dicer, the transactivating response RNA-binding protein and Argonaute 2. Dicer is an RNase III endonuclease which generates the dsRNA fragments to be loaded that direct RNAi.
However, the exact nature of the association between microRNA processing and tumorigenesis is unclear, [21] but its function can be effectively examined by siRNA knockdown based on an independent validation. [22] Drosha and other miRNA processing enzymes may also be important in HIV-1 replication. miRNAs contribute to the innate antiviral defense.
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 ...
miR-324-5p is a reverse strand miRNA, meaning it is produced from the 5' end of the associated RNA, and spans from position 7,223,342 to 7,223,364 on chromosome 17. [14] Its sequence is CGCAUCCCCUAGGGCAUUGGUG. [15] [16] miRNA forms following cleavage of pre-miRNA at the hairpin loop by the enzyme dicer within the cytosol. Interestingly, both ...
The miR-15 microRNA precursor family is made up of small non-coding RNA genes that regulate gene expression. The family includes the related mir-15a and mir-15b sequences, as well as miR-16-1, miR-16-2, miR-195 and miR-497. These six highly conserved miRNAs are clustered on three separate chromosomes. [1]
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 ...
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