1j6s: Difference between revisions
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== | ==Crystal Structure of an RNA Tetraplex (UGAGGU)4 with A-tetrads, G-tetrads, U-tetrads and G-U octads== | ||
<StructureSection load='1j6s' size='340' side='right'caption='[[1j6s]], [[Resolution|resolution]] 1.40Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[1j6s]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1J6S OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1J6S 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]] 1.4Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BA:BARIUM+ION'>BA</scene>, <scene name='pdbligand=BRU:5-BROMO-2-DEOXYURIDINE-5-MONOPHOSPHATE'>BRU</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></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=1j6s FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1j6s OCA], [https://pdbe.org/1j6s PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1j6s RCSB], [https://www.ebi.ac.uk/pdbsum/1j6s PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1j6s ProSAT]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Purine-rich regions in DNA and RNA may contain both guanines and adenines, which have various biological functions. Here we report the crystal structure of an RNA purine-rich fragment containing both guanine and adenine at 1.4 A resolution. Adenines form an adenine tetrad in the N6-H em leader N7 conformation. Substitution of an adenine tetrad in the guanine tetraplex does not change the global conformation but introduces irregularity in both the hydrogen bonding interaction pattern in the groove and the metal ion binding pattern in the central cavity of the tetraplex. The irregularity in groove binding may be critical for specific binding in tetraplexes. The formation of G-U octads provides a mechanism for interaction in the groove. Ba(2+) ions prefer to bind guanine tetrads, and adenine tetrads can only be bound by Na(+) ions, illustrating the binding selectivity of metal ions for the tetraplex. | Purine-rich regions in DNA and RNA may contain both guanines and adenines, which have various biological functions. Here we report the crystal structure of an RNA purine-rich fragment containing both guanine and adenine at 1.4 A resolution. Adenines form an adenine tetrad in the N6-H em leader N7 conformation. Substitution of an adenine tetrad in the guanine tetraplex does not change the global conformation but introduces irregularity in both the hydrogen bonding interaction pattern in the groove and the metal ion binding pattern in the central cavity of the tetraplex. The irregularity in groove binding may be critical for specific binding in tetraplexes. The formation of G-U octads provides a mechanism for interaction in the groove. Ba(2+) ions prefer to bind guanine tetrads, and adenine tetrads can only be bound by Na(+) ions, illustrating the binding selectivity of metal ions for the tetraplex. | ||
Crystal structure of an RNA purine-rich tetraplex containing adenine tetrads: implications for specific binding in RNA tetraplexes.,Pan B, Xiong Y, Shi K, Deng J, Sundaralingam M Structure. 2003 Jul;11(7):815-23. PMID:12842044<ref>PMID:12842044</ref> | |||
== | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | |||
[[Category: | <div class="pdbe-citations 1j6s" style="background-color:#fffaf0;"></div> | ||
[[Category: Deng | == References == | ||
[[Category: Pan | <references/> | ||
[[Category: Shi | __TOC__ | ||
[[Category: Sundaralingam | </StructureSection> | ||
[[Category: Xiong | [[Category: Large Structures]] | ||
[[Category: Deng J]] | |||
[[Category: Pan B]] | |||
[[Category: Shi K]] | |||
[[Category: Sundaralingam M]] | |||
[[Category: Xiong Y]] | |||
Latest revision as of 23:43, 27 December 2023
Crystal Structure of an RNA Tetraplex (UGAGGU)4 with A-tetrads, G-tetrads, U-tetrads and G-U octads
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