168d: Difference between revisions
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<table><tr><td colspan='2'>[[168d]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=168D OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=168D FirstGlance]. <br> | <table><tr><td colspan='2'>[[168d]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=168D OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=168D FirstGlance]. <br> | ||
</td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=A2M:2-O-METHYLADENOSINE+5-(DIHYDROGEN+PHOSPHATE)'>A2M</scene></td></tr> | </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=A2M:2-O-METHYLADENOSINE+5-(DIHYDROGEN+PHOSPHATE)'>A2M</scene></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=168d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=168d OCA], [http://www.rcsb.org/pdb/explore.do?structureId=168d RCSB], [http://www.ebi.ac.uk/pdbsum/168d PDBsum]</span></td></tr> | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=168d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=168d OCA], [http://pdbe.org/168d PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=168d RCSB], [http://www.ebi.ac.uk/pdbsum/168d PDBsum]</span></td></tr> | ||
</table> | </table> | ||
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 168d" style="background-color:#fffaf0;"></div> | |||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 18:44, 9 September 2015
STABILIZING EFFECTS OF THE RNA 2'-SUBSTITUENT: CRYSTAL STRUCTURE OF AN OLIGODEOXYNUCLEOTIDE DUPLEX CONTAINING 2'-O-METHYLATED ADENOSINESSTABILIZING EFFECTS OF THE RNA 2'-SUBSTITUENT: CRYSTAL STRUCTURE OF AN OLIGODEOXYNUCLEOTIDE DUPLEX CONTAINING 2'-O-METHYLATED ADENOSINES
Structural highlights
Publication Abstract from PubMedBACKGROUND: The stability of hybrids of 2'-O-methyl-ribonucleotides with complementary RNA is considerably higher than that of the corresponding DNA.RNA duplexes. The 2'-O-modified ribonucleotides are thus an attractive class of compounds for antisense applications. Understanding how these substituents stabilize the structure of the hybrid duplex may be important in the design of ribonucleotides with novel properties. RESULTS: The crystal structure of a dimer of the self-complementary DNA strand d(GCGT)O2'mer(A)d(TACGC), which has a 2'-O-methylated ribonucleotide incorporated at position 5, was determined at 2.1 A resolution. This strand forms a duplex with an overall A-type conformation; the methyl groups of the two modified adenosines point into the relatively wide minor groove. Both 2'-methoxy groups are hydrogen-bonded to solvent molecules. These results allowed us to build a model of a fully 2'-O-methylated RNA double helix. CONCLUSIONS: Insertion of 2'-O-modified RNA residues into a stretch of DNA can nucleate a local A-type conformation, in part because modification with a bulky residue at this position stabilizes a C3'-endo type sugar pucker. The increased stability of fully 2'-O-methylated RNA may result from hydrophobic interactions between substituents in the minor groove. As the 2'-O-methyl groups are directed into the minor groove, it may be worthwhile to introduce tailor-made 2'-O-substituents into RNA; it might be possible to design groups that both stabilize the hybrid duplexes and carry a nuclease function, further improving the efficacy of these modified RNAs in antisense applications. Stabilizing effects of the RNA 2'-substituent: crystal structure of an oligodeoxynucleotide duplex containing 2'-O-methylated adenosines.,Lubini P, Zurcher W, Egli M Chem Biol. 1994 Sep;1(1):39-45. PMID:9383369[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References |
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