6pun: Difference between revisions
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==Crystal structure of a ternary complex of FBF-2 with LST-1 (site B) and compact FBE RNA== | |||
<StructureSection load='6pun' size='340' side='right'caption='[[6pun]], [[Resolution|resolution]] 2.10Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[6pun]] is a 6 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6PUN OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6PUN FirstGlance]. <br> | |||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6pun FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6pun OCA], [http://pdbe.org/6pun PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6pun RCSB], [http://www.ebi.ac.uk/pdbsum/6pun PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6pun ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[[http://www.uniprot.org/uniprot/FBF2_CAEEL FBF2_CAEEL]] Involved in the control of stem cells and sex determination in the C.elegans hermaphrodite germline. May also play a role in the hermaphrodite germline proliferation and oogenesis. Binds specifically to the regulatory region of fem-3 3'-UTR and mediates the sperm/oocyte switch. Negatively regulates gld-3 expression possibly by directly binding to two sites within the gld-3 isoform B 3'-UTR.<ref>PMID:9393998</ref> <ref>PMID:15454534</ref> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
In the Caenorhabditis elegans germline, fem-3 Binding Factor (FBF) partners with LST-1 to maintain stem cells. A crystal structure of an FBF-2/LST-1/RNA complex revealed that FBF-2 recognizes a short RNA motif different from the characteristic 9-nt FBF binding element, and compact motif recognition coincided with curvature changes in the FBF-2 scaffold. Previously, we engineered FBF-2 to favor recognition of shorter RNA motifs without curvature change (Bhat et al., 2019). In vitro selection of RNAs bound by FBF-2 suggested sequence specificity in the central region of the compact element. This bias, reflected in the crystal structure, was validated in RNA-binding assays. FBF-2 has the intrinsic ability to bind to this shorter motif. LST-1 weakens FBF-2 binding affinity for short and long motifs, which may increase target selectivity. Our findings highlight the role of FBF scaffold flexibility in RNA recognition and suggest a new mechanism by which protein partners refine target site selection. | |||
A crystal structure of a collaborative RNA regulatory complex reveals mechanisms to refine target specificity.,Qiu C, Bhat VD, Rajeev S, Zhang C, Lasley AE, Wine RN, Campbell ZT, Hall TMT Elife. 2019 Aug 9;8. pii: 48968. doi: 10.7554/eLife.48968. PMID:31397673<ref>PMID:31397673</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
<div class="pdbe-citations 6pun" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Campbell, Z T]] | |||
[[Category: Hall, T M.T]] | |||
[[Category: Qiu, C]] | [[Category: Qiu, C]] | ||
[[Category: | [[Category: Protein-rna complex]] | ||
[[Category: | [[Category: Puf]] | ||
[[Category: Rna binding protein-rna complex]] | |||
Revision as of 06:05, 21 August 2019
Crystal structure of a ternary complex of FBF-2 with LST-1 (site B) and compact FBE RNA
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