1DSA

(+)-DUOCARMYCIN SA COVALENTLY LINKED TO DUPLEX DNA, NMR, 20 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST RESTRAINT VIOLATIONS 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

High resolution solution structure of a DNA duplex alkylated by the antitumor agent duocarmycin SA.

Eis, P.S.Smith, J.A.Rydzewski, J.M.Case, D.A.Boger, D.L.Chazin, W.J.

(1997) J Mol Biol 272: 237-252

  • DOI: https://doi.org/10.1006/jmbi.1997.1223
  • Primary Citation of Related Structures:  
    1DSA

  • PubMed Abstract: 

    The three-dimensional solution structure of duocarmycin SA in complex with d-(G1ACTAATTGAC11).d-(G12TCATTAGTC22) has been determined by restrained molecular dynamics and relaxation matrix calculations using experimental NOE distance and torsion angle constraints derived from 1H NMR spectroscopy. The final input data consisted of a total of 858 distance and 189 dihedral angle constraints, an average of 46 constraints per residue. In the ensemble of 20 final structures, there were no distance constraint violations >0.06 A or torsion angle violations >0.8 degrees. The average pairwise root mean square deviation (RMSD) over all 20 structures for the binding site region is 0.57 A (average RMSD from the mean: 0.39 A). Although the DNA is very B-like, the sugar-phosphate backbone torsion angles beta, epsilon, and zeta are distorted from standard values in the binding site region. The structure reveals site-specific bonding of duocarmycin SA at the N3 position of adenine 19 in the AT-rich minor groove of the duplex and binding stabilization via hydrophobic interactions. Comparisons have been made to the structure of a closely related complex of duocarmycin A bound to an AT-rich DNA duplex. These results provide insights into critical aspects of the alkylation site selectivity and source of catalysis of the DNA alkylating agents, and the unusual stability of the resulting adducts.


  • Organizational Affiliation

    Department of Molecular Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.


Macromolecules

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains LengthOrganismImage
DNA (5'-D(*GP*AP*CP*TP*AP*AP*TP*TP*GP*AP*C)-3', 5'-D(*GP*TP*CP*AP*AP*TP*TP*AP*GP*TP*C)-3')11N/A
Sequence Annotations
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  • Reference Sequence

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains LengthOrganismImage
DNA (5'-D(*GP*AP*CP*TP*AP*AP*TP*TP*GP*AP*C)-3', 5'-D(*GP*TP*CP*AP*AP*TP*TP*AP*GP*TP*C)-3')11N/A
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
DSA
Query on DSA

Download Ideal Coordinates CCD File 
C [auth B]4-HYDROXY-8-METHYL-6-(4,5,6-TRIMETHOXY-1H-INDOLE-2-CARBONYL)-3,6,7,8-TETRAHYDRO-3,6-DIAZA-AS-INDACENE-2-CARBOXYLIC ACID METHYL ESTER
C25 H25 N3 O7
JMVYAMWFXLCMJM-NSHDSACASA-N
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST RESTRAINT VIOLATIONS 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-08-20
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-16
    Changes: Data collection, Database references, Derived calculations, Other