View source for 5kla


==Crystal structure of the drosophila Pumilio RNA-binding domain in complex with hunchback RNA==
<StructureSection load='5kla' size='340' side='right'caption='[[5kla]], [[Resolution|resolution]] 1.14&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5kla]] 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=5KLA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5KLA FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.14&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=5kla FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5kla OCA], [https://pdbe.org/5kla PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5kla RCSB], [https://www.ebi.ac.uk/pdbsum/5kla PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5kla ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/PUM_DROME PUM_DROME] Sequence-specific RNA-binding protein that regulates translation and mRNA stability by binding to the Nanos Response Element (NRE), a 16 bp sequence in the hb mRNA 3'-UTR and prevents its translation. Required for abdominal development and to support proliferation and self-renewal of germ cells. Pum is the only gene required for nos activity that is not also required for posterior localization of germline determinants. Pum is required during embryogenesis when nos activity apparently moves anteriorly from the posterior pole.<ref>PMID:1459455</ref> <ref>PMID:1576962</ref> <ref>PMID:9660969</ref> 
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== Publication Abstract from PubMed ==
Collaboration among the multitude of RNA-binding proteins (RBPs) is ubiquitous, yet our understanding of these key regulatory complexes has been limited to single RBPs. We investigated combinatorial translational regulation by Drosophila Pumilio (Pum) and Nanos (Nos), which control development, fertility, and neuronal functions. Our results show how the specificity of one RBP (Pum) is modulated by cooperative RNA recognition with a second RBP (Nos) to synergistically repress mRNAs. Crystal structures of Nos-Pum-RNA complexes reveal that Nos embraces Pum and RNA, contributes sequence-specific contacts, and increases Pum RNA-binding affinity. Nos shifts the recognition sequence and promotes repression complex formation on mRNAs that are not stably bound by Pum alone, explaining the preponderance of sub-optimal Pum sites regulated in vivo. Our results illuminate the molecular mechanism of a regulatory switch controlling crucial gene expression programs, and provide a framework for understanding how the partnering of RBPs evokes changes in binding specificity that underlie regulatory network dynamics.

Drosophila Nanos acts as a molecular clamp that modulates the RNA-binding and repression activities of Pumilio.,Weidmann CA, Qiu C, Arvola RM, Lou TF, Killingsworth J, Campbell ZT, Tanaka Hall TM, Goldstrohm AC Elife. 2016 Aug 2;5. pii: e17096. doi: 10.7554/eLife.17096. PMID:27482653<ref>PMID:27482653</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 5kla" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Drosophila melanogaster]]
[[Category: Large Structures]]
[[Category: Hall TMT]]
[[Category: Qiu C]]