2lbs: Difference between revisions

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== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[2lbs]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2LBS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2LBS FirstGlance]. <br>
<table><tr><td colspan='2'>[[2lbs]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2LBS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2LBS FirstGlance]. <br>
</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=2lbs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2lbs OCA], [https://pdbe.org/2lbs PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2lbs RCSB], [https://www.ebi.ac.uk/pdbsum/2lbs PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2lbs ProSAT]</span></td></tr>
</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=2lbs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2lbs OCA], [https://pdbe.org/2lbs PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2lbs RCSB], [https://www.ebi.ac.uk/pdbsum/2lbs PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2lbs ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[https://www.uniprot.org/uniprot/RNT1_YEAST RNT1_YEAST] DsRNA-specific nuclease that cleaves eukaryotic pre-ribosomal RNA at the U3 snoRNP-dependent A0 site in the 5'-external transcribed spacer (ETS) and in the 3'-ETS. In vitro, cleaves synthetic 5'-ETS RNA A0 site in the absence of snoRNA or other factors. Has an essential growth function in addition to pre-rRNA processing.
[https://www.uniprot.org/uniprot/RNT1_YEAST RNT1_YEAST] DsRNA-specific nuclease that cleaves eukaryotic pre-ribosomal RNA at the U3 snoRNP-dependent A0 site in the 5'-external transcribed spacer (ETS) and in the 3'-ETS. In vitro, cleaves synthetic 5'-ETS RNA A0 site in the absence of snoRNA or other factors. Has an essential growth function in addition to pre-rRNA processing.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
dsRBDs often bind dsRNAs with some specificity, yet the basis for this is poorly understood. Rnt1p, the major RNase III in Saccharomyces cerevisiae, cleaves RNA substrates containing hairpins capped by A/uGNN tetraloops, using its dsRBD to recognize a conserved tetraloop fold. However, the identification of a Rnt1p substrate with an AAGU tetraloop raised the question of whether Rnt1p binds to this noncanonical substrate differently than to A/uGNN tetraloops. The solution structure of Rnt1p dsRBD bound to an AAGU-capped hairpin reveals that the tetraloop undergoes a structural rearrangement upon binding to Rnt1p dsRBD to adopt a backbone conformation that is essentially the same as the AGAA tetraloop, and indicates that a conserved recognition mode is used for all Rnt1p substrates. Comparison of free and RNA-bound Rnt1p dsRBD reveals that tetraloop-specific binding requires a conformational change in helix alpha1. Our findings provide a unified model of binding site selection by this dsRBD.
Structure of a yeast RNase III dsRBD complex with a noncanonical RNA substrate provides new insights into binding specificity of dsRBDs.,Wang Z, Hartman E, Roy K, Chanfreau G, Feigon J Structure. 2011 Jul 13;19(7):999-1010. PMID:21742266<ref>PMID:21742266</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 2lbs" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Ribonuclease 3D structures|Ribonuclease 3D structures]]
*[[Ribonuclease 3D structures|Ribonuclease 3D structures]]
== References ==
<references/>
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</StructureSection>
</StructureSection>
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