4u37: Difference between revisions
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New page: '''Unreleased structure''' The entry 4u37 is ON HOLD Authors: Sheng, J., Larsen, A., Heuberger, B., Blain, J.C, Szostak, J.W. Description: Native 7mer-RNA duplex |
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==Native 7mer-RNA duplex== | |||
<StructureSection load='4u37' size='340' side='right'caption='[[4u37]], [[Resolution|resolution]] 1.55Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[4u37]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4U37 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4U37 FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.55Å</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=4u37 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4u37 OCA], [https://pdbe.org/4u37 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4u37 RCSB], [https://www.ebi.ac.uk/pdbsum/4u37 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4u37 ProSAT]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Structural studies of modified nucleobases in RNA duplexes are critical for developing a full understanding of the stability and specificity of RNA base pairing. 2-Thio-uridine (s2U) is a modified nucleobase found in certain tRNAs. Thermodynamic studies have evaluated the effects of s2U on base pairing in RNA, where it has been shown to stabilize U:A pairs and destabilize U:G wobble pairs. Surprisingly, no high-resolution crystal structures of s2U-containing RNA duplexes have yet been reported. We present here two high-resolution crystal structures of heptamer RNA duplexes (5'-uagcs2Ucc-3' paired with 3'-aucgAgg-5' and with 3'-aucgUgg-5') containing s2U:A and s2U:U pairs, respectively. For comparison, we also present the structures of their native counterparts solved under identical conditions. We found that replacing O2 with S2 stabilizes the U:A base pair without any detectable structural perturbation. In contrast, an s2U:U base pair is strongly stabilized in one specific U:U pairing conformation out of four observed for the native U:U base pair. This s2U:U stabilization appears to be due at least in part to an unexpected sulfur-mediated hydrogen bond. This work provides additional insights into the effects of 2-thio-uridine on RNA base pairing. | |||
Crystal Structure Studies of RNA Duplexes Containing sU:A and sU:U Base Pairs.,Sheng J, Larsen A, Heuberger BD, Blain JC, Szostak JW J Am Chem Soc. 2014 Sep 16. PMID:25188906<ref>PMID:25188906</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 4u37" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Synthetic construct]] | |||
[[Category: Blain JC]] | |||
[[Category: Heuberger B]] | |||
[[Category: Larsen A]] | |||
[[Category: Sheng J]] | |||
[[Category: Szostak JW]] | |||
