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[[Image:1vs2.gif|left|200px]]<br /><applet load="1vs2" size="350" color="white" frame="true" align="right" spinBox="true"
caption="1vs2, resolution 2.000&Aring;" />
'''Interactions of quinoxaline antibiotic and DNA: the molecular structure of a TRIOSTIN A-D(GCGTACGC) complex'''<br />


==Overview==
==Interactions of quinoxaline antibiotic and DNA: the molecular structure of a TRIOSTIN A-D(GCGTACGC) complex==
<StructureSection load='1vs2' size='340' side='right'caption='[[1vs2]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1vs2]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptomyces_sp. Streptomyces sp.]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1VS2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1VS2 FirstGlance]. <br>
</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&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=DSN:D-SERINE'>DSN</scene>, <scene name='pdbligand=MVA:N-METHYLVALINE'>MVA</scene>, <scene name='pdbligand=NCY:N-METHYLCYSTEINE'>NCY</scene>, <scene name='pdbligand=QUI:2-CARBOXYQUINOXALINE'>QUI</scene></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=1vs2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1vs2 OCA], [https://pdbe.org/1vs2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1vs2 RCSB], [https://www.ebi.ac.uk/pdbsum/1vs2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1vs2 ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The crystal structure of a DNA octamer d(GCGTACGC) complexed to an antitumor antibiotic, triostin A, has been solved and refined to 2.2 A resolution by x-ray diffraction analysis. The antibiotic molecule acts as a true bis intercalator surrounding the d(CpG) sequence at either end of the unwound right-handed DNA double helix. As previously observed in the structure of triostin A-d(CGTACG) complex (A.H.-J. Wang, et. al., Science, 225, 1115-1121 (1984)), the alanine amino acid residues of the drug molecule form sequence-specific hydrogen bonds to guanines in the minor groove. The two central A.T base pairs are in Hoogsteen configuration with adenine in the syn conformation. In addition, the two terminal G.C base pairs flanking the quinoxaline rings are also held together by Hoogsteen base pairing. This is the first observation in an oligonucleotide of. Hoogsteen G.C base pairs where the cytosine is protonated. The principal functional components of a bis-intercalative compound are discussed.
The crystal structure of a DNA octamer d(GCGTACGC) complexed to an antitumor antibiotic, triostin A, has been solved and refined to 2.2 A resolution by x-ray diffraction analysis. The antibiotic molecule acts as a true bis intercalator surrounding the d(CpG) sequence at either end of the unwound right-handed DNA double helix. As previously observed in the structure of triostin A-d(CGTACG) complex (A.H.-J. Wang, et. al., Science, 225, 1115-1121 (1984)), the alanine amino acid residues of the drug molecule form sequence-specific hydrogen bonds to guanines in the minor groove. The two central A.T base pairs are in Hoogsteen configuration with adenine in the syn conformation. In addition, the two terminal G.C base pairs flanking the quinoxaline rings are also held together by Hoogsteen base pairing. This is the first observation in an oligonucleotide of. Hoogsteen G.C base pairs where the cytosine is protonated. The principal functional components of a bis-intercalative compound are discussed.


==About this Structure==
Interactions of quinoxaline antibiotic and DNA: the molecular structure of a triostin A-d(GCGTACGC) complex.,Wang AH, Ughetto G, Quigley GJ, Rich A J Biomol Struct Dyn. 1986 Dec;4(3):319-42. PMID:3271447<ref>PMID:3271447</ref>
1VS2 is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/ ] with <scene name='pdbligand=QUI:'>QUI</scene>, <scene name='pdbligand=NCY:'>NCY</scene>, <scene name='pdbligand=MVA:'>MVA</scene>, <scene name='pdbligand=SER:'>SER</scene> and <scene name='pdbligand=ALA:'>ALA</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1VS2 OCA].


==Reference==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
Interactions of quinoxaline antibiotic and DNA: the molecular structure of a triostin A-d(GCGTACGC) complex., Wang AH, Ughetto G, Quigley GJ, Rich A, J Biomol Struct Dyn. 1986 Dec;4(3):319-42. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=3271447 3271447]
</div>
[[Category: Protein complex]]
<div class="pdbe-citations 1vs2" style="background-color:#fffaf0;"></div>
[[Category: Quigley, G J.]]
== References ==
[[Category: Rich, A.]]
<references/>
[[Category: Ughetto, G.]]
__TOC__
[[Category: Wang, A H.J.]]
</StructureSection>
[[Category: ALA]]
[[Category: Large Structures]]
[[Category: MVA]]
[[Category: Streptomyces sp]]
[[Category: NCY]]
[[Category: Quigley GJ]]
[[Category: QUI]]
[[Category: Rich A]]
[[Category: SER]]
[[Category: Ughetto G]]
[[Category: complexed with drug]]
[[Category: Wang AH-J]]
[[Category: double helix]]
[[Category: right handed dna]]
 
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