词条 | DGCR8 |
释义 |
The DGCR8 microprocessor complex subunit (DiGeorge syndrome chromosomal [or critical] region 8) is a protein that in humans is encoded by the DGCR8 gene.[1] In other animals, particularly the common model organisms Drosophila melanogaster and Caenorhabditis elegans, the protein is known as Pasha (partner of Drosha).[2] It is a required component of the RNA interference pathway. FunctionDGCR8 is localized to the cell nucleus and is required for microRNA (miRNA) processing. It binds to Drosha, an RNase III enzyme, to form the Microprocessor complex that cleaves a primary transcript known as pri-miRNA to a characteristic stem-loop structure known as a pre-miRNA, which is then further processed to miRNA fragments by the enzyme Dicer. DGCR8 contains an RNA-binding domain and is thought to bind pri-miRNA to stabilize it for processing by Drosha.[3] DGCR8 is also required for some types of DNA repair. Removal of UV-induced DNA photoproducts, during transcription coupled nucleotide excision repair (TC-NER), depends on JNK phosphorylation of DGCR8 on serine 153.[4] While DGCR8 is known to function in microRNA biogenesis, this activity is not required for DGCR8-dependent removal of UV-induced photoproducts.[4] Nucleotide excision repair is also needed for repair of oxidative DNA damage due to hydrogen peroxide ({{chem|H2O2}}), and DGCR8 depleted cells are sensitive to {{chem|H2O2}}.[4] References1. ^{{cite web | title = Entrez Gene: DGCR8 DiGeorge syndrome critical region gene 8| url = https://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=54487| accessdate = }} 2. ^{{cite journal | vauthors = Denli AM, Tops BB, Plasterk RH, Ketting RF, Hannon GJ | title = Processing of primary microRNAs by the Microprocessor complex | journal = Nature | volume = 432 | issue = 7014 | pages = 231–5 | date = Nov 2004 | pmid = 15531879 | doi = 10.1038/nature03049 }} 3. ^{{cite journal | vauthors = Yeom KH, Lee Y, Han J, Suh MR, Kim VN | title = Characterization of DGCR8/Pasha, the essential cofactor for Drosha in primary miRNA processing | journal = Nucleic Acids Research | volume = 34 | issue = 16 | pages = 4622–9 | year = 2006 | pmid = 16963499 | pmc = 1636349 | doi = 10.1093/nar/gkl458 }} 4. ^1 2 {{cite journal |vauthors=Calses PC, Dhillon KK, Tucker N, Chi Y, Huang JW, Kawasumi M, Nghiem P, Wang Y, Clurman BE, Jacquemont C, Gafken PR, Sugasawa K, Saijo M, Taniguchi T |title=DGCR8 Mediates Repair of UV-Induced DNA Damage Independently of RNA Processing |journal=Cell Rep |volume=19 |issue=1 |pages=162–174 |year=2017 |pmid=28380355 |doi=10.1016/j.celrep.2017.03.021 |pmc=5423785}} Further reading{{refbegin | 2}}
3 : MicroRNA|RNA interference|DNA repair |
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