6s8r

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'''Unreleased structure'''
 
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The entry 6s8r is ON HOLD until Paper Publication
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==D. melanogaster RNA helicase Me31B in complex with GIGYF==
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<StructureSection load='6s8r' size='340' side='right'caption='[[6s8r]], [[Resolution|resolution]] 2.41&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[6s8r]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Drosophila_melanogaster Drosophila melanogaster]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6S8R OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6S8R FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.41&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6s8r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6s8r OCA], [https://pdbe.org/6s8r PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6s8r RCSB], [https://www.ebi.ac.uk/pdbsum/6s8r PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6s8r ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/DDX6_DROME DDX6_DROME] ATP-dependent RNA helicase which is a core component of a variety of ribonucleoprotein complexes (RNPs) that play critical roles in translational repression and mRNA decapping during embryogenesis, oogenesis, neurogenesis and neurotransmission (PubMed:11546740, PubMed:16256742, PubMed:17178403, PubMed:18590813, PubMed:21267420, PubMed:21447556, PubMed:28875934, PubMed:28388438, PubMed:17982591). Recruits core components and translational repressors to some RNP complexes, and mediates RNP aggregation into processing granules such as P-bodies (PubMed:28875934, PubMed:11546740, PubMed:16256742, PubMed:17178403, PubMed:21267420, PubMed:21447556, PubMed:17982591). As part of a RNP complex containing tral, eIF4E1, cup, and pAbp, involved in RNP-mediated translational repression of maternal mRNAs during oogenesis and embryogenesis (PubMed:28875934). As part of a RNP complex containing tral and the RNA localization factors exu and yps, mediates translational silencing of mRNAs such as osk/oskar and bcd/bicoid during their transport to the oocyte in order to prevent their translation until they reach their positional destinations (PubMed:11546740). In neurons and possibly imaginal disks, involved in miRNA-mediated translational repression, possibly in association with components of the piRNA transposon silencing pathway (PubMed:21447556, PubMed:17178403, PubMed:21267420, PubMed:17982591, PubMed:21081899). Involved in RNA localization and protein trafficking in the oocyte (PubMed:11546740, PubMed:16256742). As part of an ER-associated RNP containing tral, cup and yps, required for tral-dependent ER exit site formation and consequently efficient trafficking of proteins such as grk and yl through the secretory pathway (PubMed:16256742). Component of neuron RNPs that mediate transport and translation of neuronal RNAs, including translation repression of synaptic transcripts in preparation for their dendritic targeting (PubMed:17178403, PubMed:21267420, PubMed:28388438). As part of the Atx2-Not1 repressor complex promotes Not1-dependent post-transcriptional gene silencing in adult circadian pacemaker neurons in order to sustain high-amplitude circadian rhythms and Pdf cycling in a per-independent manner (PubMed:28388438). Promotes the interaction between Atx2 and Not1 within the Atx2-Not1 RNP complex (PubMed:28388438).<ref>PMID:11546740</ref> <ref>PMID:16256742</ref> <ref>PMID:17178403</ref> <ref>PMID:17982591</ref> <ref>PMID:18590813</ref> <ref>PMID:21081899</ref> <ref>PMID:21267420</ref> <ref>PMID:21447556</ref> <ref>PMID:28388438</ref> <ref>PMID:28875934</ref>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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GIGYF (Grb10-interacting GYF [glycine-tyrosine-phenylalanine domain]) proteins coordinate with 4EHP (eIF4E [eukaryotic initiation factor 4E] homologous protein), the DEAD (Asp-Glu-Ala-Asp)-box helicase Me31B/DDX6, and mRNA-binding proteins to elicit transcript-specific repression. However, the underlying molecular mechanism remains unclear. Here, we report that GIGYF contains a motif necessary and sufficient for direct interaction with Me31B/DDX6. A 2.4 A crystal structure of the GIGYF-Me31B complex reveals that this motif arranges into a coil connected to a beta hairpin on binding to conserved hydrophobic patches on the Me31B RecA2 domain. Structure-guided mutants indicate that 4EHP-GIGYF-DDX6 complex assembly is required for tristetraprolin-mediated down-regulation of an AU-rich mRNA, thus revealing the molecular principles of translational repression.
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Authors:
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Molecular basis for GIGYF-Me31B complex assembly in 4EHP-mediated translational repression.,Peter D, Ruscica V, Bawankar P, Weber R, Helms S, Valkov E, Igreja C, Izaurralde E Genes Dev. 2019 Oct 1;33(19-20):1355-1360. doi: 10.1101/gad.329219.119. Epub 2019, Aug 22. PMID:31439631<ref>PMID:31439631</ref>
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Description:
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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[[Category: Unreleased Structures]]
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</div>
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<div class="pdbe-citations 6s8r" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Drosophila melanogaster]]
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[[Category: Large Structures]]
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[[Category: Peter D]]
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[[Category: Valkov E]]

Current revision

D. melanogaster RNA helicase Me31B in complex with GIGYF

PDB ID 6s8r

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