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==Solution Structure of the Active Site Stem-Loop of the VS Ribozyme==
<StructureSection load='1tjz' size='340' side='right'caption='[[1tjz]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1tjz]] is a 1 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TJZ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1TJZ 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=1tjz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1tjz OCA], [https://pdbe.org/1tjz PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1tjz RCSB], [https://www.ebi.ac.uk/pdbsum/1tjz PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1tjz ProSAT]</span></td></tr>
</table>
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== Publication Abstract from PubMed ==
The VS ribozyme is the largest ribozyme in its class and is also the least structurally characterized thus far. The current working model of the VS ribozyme locates the active site in stem-loop VI. The solution structure of this active site loop was determined using high resolution NMR spectroscopy. The structure reveals that the ground-state conformation of the active site differs significantly from that determined previously from chemical structure probing and mutational analysis of the ribozyme in its active conformation, which contains several looped out bases. In contrast, the base-pairing scheme found for the isolated loop contains three mismatched base-pairs: an A+-C, a G-U wobble, and a sheared G-A base-pair and no looped out bases. Dynamics observed within the active site loop provide insight into the mechanism by which the RNA can rearrange its secondary structure into an "activated" conformation prior to cleavage. These findings lend support to the idea that RNA secondary structure is more fluid than once believed and that a better understanding of structure and dynamic features of ribozymes is required to unravel the intricacies of their catalytic abilities.

The solution structure of the VS ribozyme active site loop reveals a dynamic "hot-spot".,Flinders J, Dieckmann T J Mol Biol. 2004 Aug 20;341(4):935-49. PMID:15328609<ref>PMID:15328609</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
*[[Ribozyme 3D structures|Ribozyme 3D structures]]
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Dieckmann T]]
[[Category: Flinders J]]