View source for 1mxj


==NMR solution structure of benz[a]anthracene-dG in ras codon 12,2; GGCAGXTGGTG==
<StructureSection load='1mxj' size='340' side='right'caption='[[1mxj]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1mxj]] is a 2 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MXJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1MXJ FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BZR:1S,2R,3S,4R-TETRAHYDRO-BENZO[A]ANTHRACENE-2,3,4-TRIOL'>BZR</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=1mxj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mxj OCA], [https://pdbe.org/1mxj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1mxj RCSB], [https://www.ebi.ac.uk/pdbsum/1mxj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1mxj ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The conformation of the trans-anti-(1S,2R,3S,4R)-N(2)-[1-(1,2,3,4-tetrahydro-2,3,4-trihydroxybenz[ a]anthracenyl)]-2'-deoxyguanosyl adduct in d(G(1)G(2)C(3)A(4)G(5)X(6)T(7)G(8)G(9)T(10)G(11)).d(C(12)A(13)C(14)C(15)A( 16)C(17)C(18)T(19)G(20)C(21)C(22)), bearing codon 12 of the human N-ras protooncogene (underlined), was determined. This adduct had S stereochemistry at the benzylic carbon. Its occurrence in DNA is a consequence of trans opening by the deoxyguanosine amino group of (1R,2S,3S,4R)-1,2-epoxy-1,2,3,4-tetrahydrobenz[a]anthracenyl-3,4-diol. The resonance frequencies, relative to the unmodified DNA, of the X(6) H1' and H6 protons were shifted downfield, whereas those of the C(18) and T(19) H1', H2', H2' ', and H3' deoxyribose protons were shifted upfield. The imino and amino resonances exhibited the expected sequential connectivities, suggesting no interruption of Watson-Crick pairing. A total of 426 interproton distances, including nine uniquely assigned BA-DNA distances, were used in the restrained molecular dynamics calculations. The refined structure showed that the benz[a]anthracene moiety bound in the minor groove, in the 5'-direction from the modified site. This was similar to the (+)-trans-anti-benzo[a]pyrene-N(2)-dG adduct having S stereochemistry at the benzylic carbon [Cosman, M., De Los Santos, C., Fiala, R., Hingerty, B. E., Singh, S. B., Ibanez, V., Margulis, L. A., Live, D., Geacintov, N. E., Broyde, S., and Patel, D. J. (1992) Proc. Natl. Acad. Sci. U.S.A. 89, 1914-1918]. It differed from the (-)-trans-anti-benzo[c]phenanthrene-N(2)-dG adduct having S stereochemistry at the benzylic carbon, which intercalated in the 5'-direction [Lin, C. H., Huang, X., Kolbanovskii, A., Hingerty, B. E., Amin, S., Broyde, S., Geacintov, N. E., and Patel, D. J. (2001) J. Mol. Biol. 306, 1059-1080]. The results provided insight into how PAH molecular topology modulates adduct structure in duplex DNA.

Minor groove orientation for the (1S,2R,3S,4R)-N2- [1-(1,2,3,4-tetrahydro-2,3,4-trihydroxybenz[a]anthracenyl)]-2'-deoxyguanos yl adduct in the N-ras codon 12 sequence.,Kim HY, Wilkinson AS, Harris CM, Harris TM, Stone MP Biochemistry. 2003 Mar 4;42(8):2328-38. PMID:12600200<ref>PMID:12600200</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1mxj" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Harris CM]]
[[Category: Harris TM]]
[[Category: Kim H-YH]]
[[Category: Stone MP]]
[[Category: Wilkinson AS]]