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==Crystal Structure of a Luteoviral RNA Pseudoknot and Model for a Minimal Ribosomal Frameshifting Motif==
<StructureSection load='2a43' size='340' side='right'caption='[[2a43]], [[Resolution|resolution]] 1.34&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2a43]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2A43 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2A43 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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=2a43 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2a43 OCA], [https://pdbe.org/2a43 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2a43 RCSB], [https://www.ebi.ac.uk/pdbsum/2a43 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2a43 ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
To understand the role of structural elements of RNA pseudoknots in controlling the extent of -1-type ribosomal frameshifting, we determined the crystal structure of a high-efficiency frameshifting mutant of the pseudoknot from potato leaf roll virus (PLRV). Correlations of the structure with available in vitro frameshifting data for PLRV pseudoknot mutants implicate sequence and length of a stem-loop linker as modulators of frameshifting efficiency. Although the sequences and overall structures of the RNA pseudoknots from PLRV and beet western yellow virus (BWYV) are similar, nucleotide deletions in the linker and adjacent minor groove loop abolish frameshifting only with the latter. Conversely, mutant PLRV pseudoknots with up to four nucleotides deleted in this region exhibit nearly wild-type frameshifting efficiencies. The crystal structure helps rationalize the different tolerances for deletions in the PLRV and BWYV RNAs, and we have used it to build a three-dimensional model of the PRLV pseudoknot with a four-nucleotide deletion. The resulting structure defines a minimal RNA pseudoknot motif composed of 22 nucleotides capable of stimulating -1-type ribosomal frameshifts.

Crystal structure of a luteoviral RNA pseudoknot and model for a minimal ribosomal frameshifting motif.,Pallan PS, Marshall WS, Harp J, Jewett FC 3rd, Wawrzak Z, Brown BA 2nd, Rich A, Egli M Biochemistry. 2005 Aug 30;44(34):11315-22. PMID:16114868<ref>PMID:16114868</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 2a43" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Egli, M]]
[[Category: Harp, J]]
[[Category: II, B A.Brown]]
[[Category: III, F C.Jewett]]
[[Category: Marshall, W S]]
[[Category: Pallan, P S]]
[[Category: Rich, A]]
[[Category: Wawrzak, Z]]
[[Category: Beet western yellow virus]]
[[Category: Bwyv]]
[[Category: Pk]]
[[Category: Plrv]]
[[Category: Potato leaf roll virus]]
[[Category: Pseudoknot]]
[[Category: Rna]]