2l7d: Difference between revisions
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==Ribonucleotide Perturbation of DNA Structure: Solution Structure of [d(CGC)r(G)d(AATTCGCG)]2== | ==Ribonucleotide Perturbation of DNA Structure: Solution Structure of [d(CGC)r(G)d(AATTCGCG)]2== | ||
<StructureSection load='2l7d' size='340' side='right'caption='[[2l7d | <StructureSection load='2l7d' size='340' side='right'caption='[[2l7d]]' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2l7d]] is a 2 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2L7D OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2L7D FirstGlance]. <br> | <table><tr><td colspan='2'>[[2l7d]] is a 2 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2L7D OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2L7D 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=2l7d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2l7d OCA], [https://pdbe.org/2l7d PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2l7d RCSB], [https://www.ebi.ac.uk/pdbsum/2l7d PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2l7d 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=2l7d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2l7d OCA], [https://pdbe.org/2l7d PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2l7d RCSB], [https://www.ebi.ac.uk/pdbsum/2l7d PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2l7d ProSAT]</span></td></tr> | |||
</table> | </table> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
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</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: DeRose | [[Category: DeRose EF]] | ||
[[Category: Kunkel | [[Category: Kunkel TA]] | ||
[[Category: London | [[Category: London RE]] | ||
[[Category: Murray | [[Category: Murray MS]] | ||
[[Category: Perera | [[Category: Perera L]] | ||
Revision as of 15:12, 15 November 2023
Ribonucleotide Perturbation of DNA Structure: Solution Structure of [d(CGC)r(G)d(AATTCGCG)]2Ribonucleotide Perturbation of DNA Structure: Solution Structure of [d(CGC)r(G)d(AATTCGCG)]2
Structural highlights
Publication Abstract from PubMedRibonucleotides are frequently incorporated into DNA during replication. They are recognized and processed by several cellular enzymes, and their continued presence in the yeast nuclear genome results in replicative stress and genome instability. Thus, it is important to understand the effects of isolated ribonucleotide incorporation on DNA structure. With this goal in mind, we describe the nuclear magnetic resonance structure of the self-complementary Dickerson dodecamer sequence [d(CGC)rGd(AATTCGCG)](2) containing two symmetrically positioned riboguanosines. The absence of an observable H(1)-H(2) scalar coupling interaction indicates a C3'-endo conformation for the ribose. Longer-range structural perturbations resulting from the presence of the ribonucleotide are limited to the adjacent and transhelical nucleotides, while the global B-form DNA structure is maintained. Because crystallographic studies have indicated that isolated ribonucleotides promote global B --> A transitions, we also performed molecular modeling analyses to evaluate the structural consequences of higher ribonucleotide substitution levels. Increasing the ribonucleotide content increased the minor groove width toward values more similar to that of A-DNA, but even 50% ribonucleotide substitution did not fully convert the B-DNA to A-DNA. Comparing our structure with the structure of an RNase H2-bound DNA supports the conclusion that, as with other DNA-protein complexes, the DNA conformation is strongly influenced by the interaction with the protein. Solution structure of the Dickerson DNA dodecamer containing a single ribonucleotide.,DeRose EF, Perera L, Murray MS, Kunkel TA, London RE Biochemistry. 2012 Mar 27;51(12):2407-16. Epub 2012 Mar 14. PMID:22390730[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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