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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.
RNA strand separation and incorporation into the Argonaute protein are guided by the strength of the hydrogen bond interaction at the 5′-ends of the RNA duplex, known as the asymmetry rule. Also the degree of complementarity between the two strands of the intermediate RNA duplex defines how the miRNA are sorted into different types of ...
The microprocessor complex consists minimally of two proteins: Drosha, a ribonuclease III enzyme; and DGCR8, a double-stranded RNA binding protein. [4] [5] [6] (DGCR8 is the name used in mammalian genetics, abbreviated from "DiGeorge syndrome critical region 8"; the homologous protein in model organisms such as flies and worms is called Pasha, for Partner of Drosha.)
Drosha exists as part of a protein complex called the Microprocessor complex, which also contains the double-stranded RNA binding protein DGCR8 (called Pasha in D. melanogaster and C. elegans). [14] DGCR8 is essential for Drosha activity and is capable of binding single-stranded fragments of the pri-miRNA that are required for proper processing ...
Cupid is a method for simultaneous prediction of miRNA-target interactions and their mediated competing endogenous RNA (ceRNA) interactions. It is an integrative approach significantly improves on miRNA-target prediction accuracy as assessed by both mRNA and protein level measurements in breast cancer cell lines.
microRNA mediated repression occurs in two ways, either by translational repression or stimulating mRNA decay. miRNA recruit the RISC complex to the mRNA to which they are bound. The link to P-bodies comes by the fact that many, if not most, of the proteins necessary for miRNA gene silencing are localized to P-bodies, as reviewed by Kulkarni et ...
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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