|
|
| (7 intermediate revisions by the same user not shown) |
| Line 1: |
Line 1: |
| [[Image:405d.gif|left|200px]]
| |
|
| |
|
| <!--
| | ==STRUCTURE OF A 16-MER RNA DUPLEX R(GCAGACUUAAAUCUGC)2 WITH WOBBLE LIKE A.C MISMATCHES== |
| The line below this paragraph, containing "STRUCTURE_405d", creates the "Structure Box" on the page.
| | <StructureSection load='405d' size='340' side='right'caption='[[405d]], [[Resolution|resolution]] 2.50Å' scene=''> |
| You may change the PDB parameter (which sets the PDB file loaded into the applet)
| | == Structural highlights == |
| or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
| | <table><tr><td colspan='2'>[[405d]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=405D OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=405D FirstGlance]. <br> |
| or leave the SCENE parameter empty for the default display.
| | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.5Å</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=405d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=405d OCA], [https://pdbe.org/405d PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=405d RCSB], [https://www.ebi.ac.uk/pdbsum/405d PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=405d ProSAT]</span></td></tr> |
| {{STRUCTURE_405d| PDB=405d | SCENE= }}
| | </table> |
| | | __TOC__ |
| '''STRUCTURE OF A 16-MER RNA DUPLEX R(GCAGACUUAAAUCUGC)2 WITH WOBBLE LIKE A.C MISMATCHES'''
| | </StructureSection> |
| | | [[Category: Large Structures]] |
| | | [[Category: Mitra SN]] |
| ==Overview== | | [[Category: Pan B]] |
| The crystal structure of a 16-mer, the longest known RNA duplex, has been determined at 2.5 A resolution. The hexadecamer r(GCAGACUUAAAUCUGC) contains isolated C.A/A.C mismatches with two hydrogen bonds. The two hydrogen bonds in the mismatches suggests that N1 of A is protonated even though the crystallization was done at neutral pH. Therefore, the C.A mismatch is a C.A+ wobble similar to the G.U wobble. The two C.A+ pairs are isolated by four Watson-Crick pairs and flanked by five Watson-Crick base-pairs on either sides. Kinks/bends of 20 degrees are observed at the wobble sites. The Watson-Crick base-pair A5.U26 on the 5'-side of the first C6.A27(+) wobble has a twist angle of 27 degrees compared to the 3'-side U7.A28 pair of 36 degrees. The twist angles are reversed (37 degrees and 26 degrees) in the second A11(+).C22 wobble because of the approximate dyad in the molecule, the flanking base-pair sequences are A.U pairs. The wobbles expand the major groove to 7.1 A/7.3 A. The duplexes form helical columns and are tightly packed around the 31-screw axis. The minor grooves of adjacent columns in juxtaposition interact through the O2' atoms and the anionic phosphate oxygen atoms.Copyright 1998 Academic Press.
| | [[Category: Sundaralingam M]] |
| | |
| ==About this Structure== | |
| Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=405D OCA]. | |
| | |
| ==Reference== | |
| Structure of a 16-mer RNA duplex r(GCAGACUUAAAUCUGC)2 with wobble C.A+ mismatches., Pan B, Mitra SN, Sundaralingam M, J Mol Biol. 1998 Nov 13;283(5):977-84. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9799637 9799637]
| |
| [[Category: Mitra, S N.]] | |
| [[Category: Pan, M Sundaralingam B.]] | |
| [[Category: A-rna double helix]] | |
| ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 22:16:12 2008''
| |
