4rbq

<table><tr><td colspan='2'>[[4rbq]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4RBQ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4RBQ FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=K:POTASSIUM+ION'>K</scene></td></tr>

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3nd3|3nd3]]</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=4rbq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4rbq OCA], [http://pdbe.org/4rbq PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4rbq RCSB], [http://www.ebi.ac.uk/pdbsum/4rbq PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4rbq ProSAT]</span></td></tr>

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== Publication Abstract from PubMed ==

Head-to-head fusions of two identical double-stranded fragments of RNA can be designed to self-assemble from a single RNA species and form a double-stranded helix with a twofold rotation axis relating the two strands. These symmetrical RNA molecules are more likely to crystallize without end-on-end statistical packing disorder because the two halves of the molecule are identical. This approach can be used to study many fragments of double-stranded RNA or many isolated helical domains from large single-stranded RNAs that may not yet be amenable to high-resolution studies by crystallography or NMR. We used fusion RNAs to study one (the U-helix) of three functional domains formed when guide RNA binds to its cognate pre-edited mRNA from the trypanosome RNA editing system. The U-helix forms when the 3' oligo(U) tail of the guide RNA (gRNA) binds to the purine-rich, pre-edited mRNA upstream from the current RNA editing site. Fusion RNAs 16-and 32-base pairs in length formed crystals that gave diffraction to 1.37 and 1.05 A respectively. We provide the composition of a fusion RNA crystallization screen and describe the X-ray data collection, structure determination, and refinement of the crystal structures of fusion RNAs.

Fusion RNAs in crystallographic studies of double-stranded RNA from trypanosome RNA editing.,Mooers BH Methods Mol Biol. 2015;1240:191-216. doi: 10.1007/978-1-4939-1896-6_14. PMID:25352146<ref>PMID:25352146</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 4rbq" style="background-color:#fffaf0;"></div>

== References ==

<references/>

[[Category: Mooers, B H.M]]

[[Category: 3' u-tail]]

[[Category: Trypanosome rna editing substrate]]