3k1v

<table><tr><td colspan='2'>[[3k1v]] is a 1 chain structure. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3fu4 3fu4]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3K1V OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=3K1V FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=PRF:7-DEAZA-7-AMINOMETHYL-GUANINE'>PRF</scene></td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=3k1v FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3k1v OCA], [http://pdbe.org/3k1v PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3k1v RCSB], [http://www.ebi.ac.uk/pdbsum/3k1v PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3k1v ProSAT]</span></td></tr>

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== Publication Abstract from PubMed ==

Riboswitches are mRNA domains that bind metabolites and modulate gene expression in cis. We report cocrystal structures of a remarkably compact riboswitch (34 nucleotides suffice for ligand recognition) from Bacillus subtilis that is selective for the essential nucleobase preQ(1) (7-aminomethyl-7-deazaguanine). The structures reveal a previously unrecognized pseudoknot fold and suggest a conserved gene-regulatory mechanism whereby ligand binding promotes sequestration of an RNA segment that otherwise assembles into a transcriptional antiterminator.

Cocrystal structure of a class I preQ1 riboswitch reveals a pseudoknot recognizing an essential hypermodified nucleobase.,Klein DJ, Edwards TE, Ferre-D'Amare AR Nat Struct Mol Biol. 2009 Mar;16(3):343-4. Epub 2009 Feb 22. PMID:19234468<ref>PMID:19234468</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 3k1v" style="background-color:#fffaf0;"></div>

== References ==

<references/>

[[Category: Edwards, T E]]

[[Category: Klein, D J]]

[[Category: Aptamer]]

[[Category: Rna]]