1MXJ

NMR solution structure of benz[a]anthracene-dG in ras codon 12,2; GGCAGXTGGTG


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Minor Groove Orientation for the (1S,2R,3S,4R)-N2-[1-(1,2,3,4-tetrahydro-2,3,4-trihydroxy-benz[a]anthracenyl)]-2'-deoxyguanosyl Adduct in the N-ras Codon 12 sequence

Kim, H.-Y.H.Wilkinson, A.S.Harris, C.M.Harris, T.M.Stone, M.P.

(2003) Biochemistry 42: 2328-2338

  • DOI: 10.1021/bi020462k

  • PubMed Abstract: 
  • 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)), ...

    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.


    Organizational Affiliation

    Department of Chemistry, Center in Molecular Toxicology, Vanderbilt-Ingram Cancer Center, Vanderbilt University, Nashville, Tennessee 37235, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsLengthOrganism
5'-D(*GP*GP*CP*AP*GP*GP*TP*GP*GP*TP*G)-3'A11N/A
Entity ID: 2
MoleculeChainsLengthOrganism
5'-D(*CP*AP*CP*CP*AP*CP*CP*TP*GP*CP*C)-3'B11N/A
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BZR
Query on BZR

Download SDF File 
Download CCD File 
A
1S,2R,3S,4R-TETRAHYDRO-BENZO[A]ANTHRACENE-2,3,4-TRIOL
C18 H16 O3
XKOJNRIIGYARBJ-KZNAEPCWSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-03-11
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance