The DGCR8 RNA-Binding Heme Domain Recognizes Primary MicroRNAs by Clamping the Hairpin
نویسندگان
چکیده
منابع مشابه
The DGCR8 RNA-binding heme domain recognizes primary microRNAs by clamping the hairpin.
Canonical primary microRNA transcripts (pri-miRNAs) are characterized by a ∼30 bp hairpin flanked by single-stranded regions. These pri-miRNAs are recognized and cleaved by the Microprocessor complex consisting of the Drosha nuclease and its obligate RNA-binding partner DGCR8. It is not well understood how the Microprocessor specifically recognizes pri-miRNA substrates. Here, we show that in ad...
متن کاملDGCR8 recognizes primary transcripts of microRNAs through highly cooperative binding and formation of higher-order structures.
DiGeorge critical region 8 (DGCR8) is essential for maturation of microRNAs (miRNAs) in animals. In the cleavage of primary transcripts of miRNAs (pri-miRNAs) by the Drosha nuclease, the DGCR8 protein directly binds and recognizes pri-miRNAs through a mechanism currently controversial. Our previous data suggest that DGCR8 trimerizes upon cooperative binding to pri-mir-30a. However, a separate s...
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The RNA-binding protein DiGeorge Critical Region 8 (DGCR8) and its partner nuclease Drosha are essential for processing of microRNA (miRNA) primary transcripts (pri-miRNAs) in animals. Previous work showed that DGCR8 forms a highly stable and active complex with ferric [Fe(III)] heme using two endogenous cysteines as axial ligands. Here we report that reduction of the heme iron to the ferrous [...
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Translational repression of hunchback (hb) mRNA in the posterior of the Drosophila embryo requires two copies of a bipartite sequence, the Nanos Response Element (NRE), located in the 3' untranslated region of the mRNA. The PUMILIO (PUM) protein is thought to bind the NREs and thereby repress hb translation. The RNA-binding domain of PUM defines an evolutionarily conserved family of RNA-binding...
متن کاملMolecular Basis for the Recognition of Primary microRNAs by the Drosha-DGCR8 Complex
The Drosha-DGCR8 complex initiates microRNA maturation by precise cleavage of the stem loops that are embedded in primary transcripts (pri-miRNAs). Here we propose a model for this process that is based upon evidence from both computational and biochemical analyses. A typical metazoan pri-miRNA consists of a stem of approximately 33 bp, with a terminal loop and flanking segments. The terminal l...
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ژورنال
عنوان ژورنال: Cell Reports
سال: 2014
ISSN: 2211-1247
DOI: 10.1016/j.celrep.2014.05.013