1tbk: Difference between revisions
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New page: left|200px<br /><applet load="1tbk" size="450" color="white" frame="true" align="right" spinBox="true" caption="1tbk" /> '''NMR structure of the VS ribozyme stem-loop V... |
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== | ==NMR structure of the VS ribozyme stem-loop V RNA in the absence of multivalent ions.== | ||
An important step in the substrate recognition of the Neurospora Varkud | <StructureSection load='1tbk' size='340' side='right'caption='[[1tbk]]' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[1tbk]] is a 1 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TBK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1TBK FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</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=1tbk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1tbk OCA], [https://pdbe.org/1tbk PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1tbk RCSB], [https://www.ebi.ac.uk/pdbsum/1tbk PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1tbk ProSAT]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
An important step in the substrate recognition of the Neurospora Varkud Satellite (VS) ribozyme is the formation of a magnesium-dependent loop/loop interaction between the terminal loops of stem-loops I and V. We have studied the structure of stem-loop V by nuclear magnetic resonance spectroscopy and shown that it adopts a U-turn conformation, a common motif found in RNA. Structural comparisons indicate that the U-turn of stem-loop V fulfills some but not all of the structural characteristics found in canonical U-turn structures. This U-turn conformation exposes the Watson-Crick faces of the bases within stem-loop V (G697, A698, and C699) and makes them accessible for interaction with stem-loop I. Using chemical-shift mapping, we show that magnesium ions interact with the loop of the isolated stem-loop V and induce a conformational change that may be important for interaction with stem-loop I. This study expands our understanding of the role of U-turn motifs in RNA structure and function and provides insights into the mechanism of substrate recognition in the VS ribozyme. | |||
Nuclear magnetic resonance structure of the Varkud satellite ribozyme stem-loop V RNA and magnesium-ion binding from chemical-shift mapping.,Campbell DO, Legault P Biochemistry. 2005 Mar 22;44(11):4157-70. PMID:15766243<ref>PMID:15766243</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 1tbk" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Ribozyme 3D structures|Ribozyme 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Campbell DO]] | |||
[[Category: Legault P]] | |||
Latest revision as of 09:25, 6 December 2023
NMR structure of the VS ribozyme stem-loop V RNA in the absence of multivalent ions.
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