1pfe

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[[Image:1pfe.gif|left|200px]]<br /><applet load="1pfe" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="1pfe, resolution 1.10&Aring;" />
 
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'''Echinomycin-(gcgtacgc)2 complex'''<br />
 
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==Overview==
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==Echinomycin-(gcgtacgc)2 complex==
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The structure of the bis-intercalation complex of the depsipeptide antibiotic echinomycin with (CGTACG)2 has been redetermined at a higher resolution (1.4 A) and new high-resolution structures (1.1-1.5 A) are reported for the complexes of echinomycin with (GCGTACGC)2 (at both low and high ionic strengths) and (ACGTACGT)2. The structures show the expected Hoogsteen pairing for the base pairs flanking the intercalating chromophores on the outside and Watson-Crick pairing for both base pairs enclosed by the echinomycin. In the octamer complexes but not the hexamer complex, the echinomycin molecule, which would possess a molecular twofold axis were it not for the thioacetal bridge, shows twofold disorder. In all the structures the stacking of the base pairs and chromophores is extended by intermolecular stacking. The structures provide more precise details of the hydrogen bonding and other interactions between the bis-intercalating antibiotics and the duplex DNA than were previously available.
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<StructureSection load='1pfe' size='340' side='right'caption='[[1pfe]], [[Resolution|resolution]] 1.10&Aring;' scene=''>
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== Structural highlights ==
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==About this Structure==
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<table><tr><td colspan='2'>[[1pfe]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptomyces_echinatus Streptomyces echinatus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PFE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1PFE FirstGlance]. <br>
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1PFE is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/ ] with <scene name='pdbligand=CL:'>CL</scene>, <scene name='pdbligand=QUI:'>QUI</scene>, <scene name='pdbligand=DSN:'>DSN</scene>, <scene name='pdbligand=ALA:'>ALA</scene>, <scene name='pdbligand=NCY:'>NCY</scene>, <scene name='pdbligand=MVA:'>MVA</scene> and <scene name='pdbligand=SER:'>SER</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PFE OCA].
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.1&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=DSN:D-SERINE'>DSN</scene>, <scene name='pdbligand=MVA:N-METHYLVALINE'>MVA</scene>, <scene name='pdbligand=N2C:N,S-DIMETHYLCYSTEINE'>N2C</scene>, <scene name='pdbligand=NCY:N-METHYLCYSTEINE'>NCY</scene>, <scene name='pdbligand=QUI:2-CARBOXYQUINOXALINE'>QUI</scene></td></tr>
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==Reference==
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1pfe FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1pfe OCA], [https://pdbe.org/1pfe PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1pfe RCSB], [https://www.ebi.ac.uk/pdbsum/1pfe PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1pfe ProSAT]</span></td></tr>
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Structures of complexes between echinomycin and duplex DNA., Cuesta-Seijo JA, Sheldrick GM, Acta Crystallogr D Biol Crystallogr. 2005 Apr;61(Pt 4):442-8. Epub 2005, Mar 24. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=15805599 15805599]
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</table>
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[[Category: Protein complex]]
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__TOC__
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[[Category: Cuesta-Seijo, J A.]]
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</StructureSection>
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[[Category: ALA]]
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[[Category: Large Structures]]
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[[Category: CL]]
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[[Category: Streptomyces echinatus]]
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[[Category: DSN]]
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[[Category: Cuesta-Seijo JA]]
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[[Category: MVA]]
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[[Category: NCY]]
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[[Category: QUI]]
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[[Category: SER]]
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[[Category: bisintercalator]]
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[[Category: duplex dna]]
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[[Category: echinomycin]]
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[[Category: hoogsteen base pairing]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 14:28:11 2008''
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Current revision

Echinomycin-(gcgtacgc)2 complex

PDB ID 1pfe

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