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| - | [[Image:1dne.gif|left|200px]] | |
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| - | <!--
| + | ==MOLECULAR STRUCTURE OF THE NETROPSIN-D(CGCGATATCGCG) COMPLEX: DNA CONFORMATION IN AN ALTERNATING AT SEGMENT; CONFORMATION 2== |
| - | The line below this paragraph, containing "STRUCTURE_1dne", creates the "Structure Box" on the page.
| + | <StructureSection load='1dne' size='340' side='right'caption='[[1dne]], [[Resolution|resolution]] 2.40Å' 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'>[[1dne]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DNE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1DNE 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]] 2.4Å</td></tr> |
| - | -->
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NT:NETROPSIN'>NT</scene></td></tr> |
| - | {{STRUCTURE_1dne| PDB=1dne | SCENE= }}
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1dne FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dne OCA], [https://pdbe.org/1dne PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1dne RCSB], [https://www.ebi.ac.uk/pdbsum/1dne PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1dne ProSAT]</span></td></tr> |
| - | | + | </table> |
| - | '''MOLECULAR STRUCTURE OF THE NETROPSIN-D(CGCGATATCGCG) COMPLEX: DNA CONFORMATION IN AN ALTERNATING AT SEGMENT; CONFORMATION 2'''
| + | __TOC__ |
| - | | + | </StructureSection> |
| - | | + | [[Category: Large Structures]] |
| - | ==Overview== | + | [[Category: Aymami J]] |
| - | The molecular structure of the complex between a minor groove binding drug (netropsin) and the DNA dodecamer d(CGCGATATCGCG) has been solved and refined by single-crystal X-ray diffraction analysis to a final R factor of 20.0% to 2.4-A resolution. The crystal is similar to that of the other related dodecamers with unit cell dimensions of a = 25.48 A, b = 41.26 A, and c = 66.88 A in the space group P2(1)2(1)2(1). In the complex, netropsin binds to the central ATAT tetranucleotide segment in the narrow minor groove of the dodecamer B-DNA double helix as expected. However, in the structural refinement the drug is found to fit the electron density in two orientations equally well, suggesting the disordered model. This agrees with the results from solution studies (chemical footprinting and NMR) of the interactions between minor groove binding drugs (e.g., netropsin and distamycin A) and DNA. The stabilizing forces between drug and DNA are provided by a combination of ionic, van der Waals, and hydrogen-bonding interactions. No bifurcated hydrogen bond is found between netropsin and DNA in this complex due to the unique dispositions of the hydrogen-bond acceptors (N3 of adenine and O2 of thymine) on the floor of the DNA minor groove. Two of the four AT base pairs in the ATAT stretch have low propeller twist angles, even though the DNA has a narrow minor groove. Alternating helical twist angles are observed in the ATAT stretch with lower twist in the ApT steps than in the TpA step.
| + | [[Category: Coll M]] |
| - | | + | [[Category: Rich A]] |
| - | ==About this Structure== | + | [[Category: Van Boom JH]] |
| - | Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DNE OCA]. | + | [[Category: Van Der Marel GA]] |
| - | | + | [[Category: Wang AH-J]] |
| - | ==Reference== | + | |
| - | Molecular structure of the netropsin-d(CGCGATATCGCG) complex: DNA conformation in an alternating AT segment., Coll M, Aymami J, van der Marel GA, van Boom JH, Rich A, Wang AH, Biochemistry. 1989 Jan 10;28(1):310-20. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/2539859 2539859]
| + | |
| - | [[Category: Aymami, J.]] | + | |
| - | [[Category: Boom, J H.Van.]] | + | |
| - | [[Category: Coll, M.]] | + | |
| - | [[Category: Marel, G A.Van Der.]] | + | |
| - | [[Category: Rich, A.]] | + | |
| - | [[Category: Wang, A H.J.]] | + | |
| - | [[Category: B-dna]] | + | |
| - | [[Category: Complexed with drug]] | + | |
| - | [[Category: Double helix]] | + | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 14:03:03 2008''
| + | |
