2ygh: Difference between revisions
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==SAM-I RIBOSWITCH WITH A G2NA MUTATION IN THE KINK TURN IN COMPLEX WITH S-ADENOSYLMETHIONINE== | |||
<StructureSection load='2ygh' size='340' side='right' caption='[[2ygh]], [[Resolution|resolution]] 2.60Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[2ygh]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2YGH OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2YGH 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>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=SAM:S-ADENOSYLMETHIONINE'>SAM</scene></td></tr> | |||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2ydh|2ydh]]</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=2ygh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ygh OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2ygh RCSB], [http://www.ebi.ac.uk/pdbsum/2ygh PDBsum]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The kink turn is a widespread RNA motif that introduces an acute kink into the axis of duplex RNA, typically comprising a bulge followed by a GA and AG pairs. The kinked conformation is stabilized by metal ions, or the binding of proteins including L7Ae. We now demonstrate a third mechanism for the stabilization of k-turn structure, involving tertiary interactions within a larger RNA structure. The SAM-I riboswitch contains an essential standard k-turn sequence that kinks a helix so that its terminal loop can make a long-range interaction. We find that some sequence variations in the k-turn within the riboswitch do not prevent SAM binding, despite preventing the folding of the k-turn in isolation. Furthermore, two crystal structures show that the sequence-variant k-turns are conventionally folded within the riboswitch. This study shows that the folded structure of the k-turn can be stabilized by tertiary interactions within a larger RNA structure. | |||
RNA tertiary interactions in a riboswitch stabilize the structure of a kink turn.,Schroeder KT, Daldrop P, Lilley DM Structure. 2011 Sep 7;19(9):1233-40. PMID:21893284<ref>PMID:21893284</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
==See Also== | ==See Also== | ||
*[[Riboswitch|Riboswitch]] | *[[Riboswitch|Riboswitch]] | ||
== References == | |||
== | <references/> | ||
< | __TOC__ | ||
[[Category: Daldrop, P | </StructureSection> | ||
[[Category: Lilley, D | [[Category: Daldrop, P]] | ||
[[Category: Schroeder, K | [[Category: Lilley, D]] | ||
[[Category: Schroeder, K]] | |||
[[Category: Rna]] | [[Category: Rna]] | ||
Revision as of 14:04, 17 December 2014
SAM-I RIBOSWITCH WITH A G2NA MUTATION IN THE KINK TURN IN COMPLEX WITH S-ADENOSYLMETHIONINE
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