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New page: left|200px<br /><applet load="1xsu" size="450" color="white" frame="true" align="right" spinBox="true" caption="1xsu" /> '''Solution structure of E.coli RNase P RNA P4 ... |
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== | ==Solution structure of E.coli RNase P RNA P4 stem, U69C/C70U mutation, complexed with cobalt (III) hexammine.== | ||
The solution structures of two 27 nt RNA hairpins and their complexes with | <StructureSection load='1xsu' size='340' side='right'caption='[[1xsu]]' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[1xsu]] is a 1 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1XSU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1XSU FirstGlance]. <br> | |||
</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='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NCO:COBALT+HEXAMMINE(III)'>NCO</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=1xsu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1xsu OCA], [https://pdbe.org/1xsu PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1xsu RCSB], [https://www.ebi.ac.uk/pdbsum/1xsu PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1xsu ProSAT]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The solution structures of two 27 nt RNA hairpins and their complexes with cobalt(III)-hexammine [Co(NH(3))(6)(3+)] were determined by NMR spectroscopy. The RNA hairpins are variants of the P4 region from Escherichia coli RNase P RNA: a U-to-A mutant changing the identity of the bulged nucleotide, and a U-to-C, C-to-U double mutant changing only the bulge position. Structures calculated from NMR constraints show that the RNA hairpins adopt different conformations. In the U-to-C, C-to-U double mutant, the conserved bulged uridine in the P4 wild-type stem is found to be shifted in the 3'-direction by one nucleotide when compared with the wild-type structure. Co(NH(3))(6)(3+) is used as a spectroscopic probe for Mg(H(2)O)(6)(2+) binding sites because both complexes have octahedral symmetry and have similar radii. Intermolecular NOE crosspeaks between Co(NH(3))(6)(3+) and RNA protons were used to locate the site of Co(NH(3))(6)(3+) binding to both RNA hairpins. The metal ion binds in the major groove near a bulge loop in both mutants, but is shifted 3' by about one base pair in the double mutant. The change of the metal ion binding site is compared with results obtained on corresponding mutant RNase P RNA molecules as reported by Harris and co-workers (RNA, 1, 210-218). | |||
Change of RNase P RNA function by single base mutation correlates with perturbation of metal ion binding in P4 as determined by NMR spectroscopy.,Schmitz M Nucleic Acids Res. 2004 Dec 2;32(21):6358-66. Print 2004. PMID:15576680<ref>PMID:15576680</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 1xsu" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Ribozyme 3D structures|Ribozyme 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Schmitz M]] | |||
Latest revision as of 12:29, 6 December 2023
Solution structure of E.coli RNase P RNA P4 stem, U69C/C70U mutation, complexed with cobalt (III) hexammine.Solution structure of E.coli RNase P RNA P4 stem, U69C/C70U mutation, complexed with cobalt (III) hexammine.
Structural highlights
Publication Abstract from PubMedThe solution structures of two 27 nt RNA hairpins and their complexes with cobalt(III)-hexammine [Co(NH(3))(6)(3+)] were determined by NMR spectroscopy. The RNA hairpins are variants of the P4 region from Escherichia coli RNase P RNA: a U-to-A mutant changing the identity of the bulged nucleotide, and a U-to-C, C-to-U double mutant changing only the bulge position. Structures calculated from NMR constraints show that the RNA hairpins adopt different conformations. In the U-to-C, C-to-U double mutant, the conserved bulged uridine in the P4 wild-type stem is found to be shifted in the 3'-direction by one nucleotide when compared with the wild-type structure. Co(NH(3))(6)(3+) is used as a spectroscopic probe for Mg(H(2)O)(6)(2+) binding sites because both complexes have octahedral symmetry and have similar radii. Intermolecular NOE crosspeaks between Co(NH(3))(6)(3+) and RNA protons were used to locate the site of Co(NH(3))(6)(3+) binding to both RNA hairpins. The metal ion binds in the major groove near a bulge loop in both mutants, but is shifted 3' by about one base pair in the double mutant. The change of the metal ion binding site is compared with results obtained on corresponding mutant RNase P RNA molecules as reported by Harris and co-workers (RNA, 1, 210-218). Change of RNase P RNA function by single base mutation correlates with perturbation of metal ion binding in P4 as determined by NMR spectroscopy.,Schmitz M Nucleic Acids Res. 2004 Dec 2;32(21):6358-66. Print 2004. PMID:15576680[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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