1PQQ

NMR Structure of a Cyclic Polyamide-DNA Complex


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 21 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

NMR Structure of a Cyclic Polyamide-DNA Complex.

Zhang, Q.Dwyer, T.J.Tsui, V.Case, D.A.Cho, J.Dervan, P.B.Wemmer, D.E.

(2004) J.Am.Chem.Soc. 126: 7958-7966

  • DOI: 10.1021/ja0373622

  • PubMed Abstract: 
  • The solution structure of a cyclic polyamide ligand complexed to a DNA oligomer, derived from NMR restrained molecular mechanics, is presented. The polyamide, cyclo-gamma-ImPyPy-gamma-PyPyPy-, binds to target DNA with a nanomolar dissociation constan ...

    The solution structure of a cyclic polyamide ligand complexed to a DNA oligomer, derived from NMR restrained molecular mechanics, is presented. The polyamide, cyclo-gamma-ImPyPy-gamma-PyPyPy-, binds to target DNA with a nanomolar dissociation constant as characterized by quantitative footprinting previously reported. 2D (1)H NMR data were used to generate distance restraints defining the structure of this cyclic polyamide with the DNA duplex d(5'-GCCTGTTAGCG-3'):d(5'-CGCTAACAGGC-3'). Data interpretation used complete relaxation matrix analysis of the NOESY cross-peak intensities with the program MARDIGRAS. The NMR-based distance restraints (276 total) were applied in restrained molecular dynamics calculations using a solvent model, yielding structures with an rmsd for the ligand and binding site of approximately 1 A. The resulting structures indicate some distortion of the DNA in the binding site. The constraints from cyclization lead to altered stacking of the rings in the halves of the cyclic ligand relative to unlinked complexes. Despite this, the interactions with DNA are very similar to what has been found in unlinked complexes. Measurements of ligand amide and DNA imino proton exchange rates indicate very slow dissociation of the ligand and show that the DNA can undergo opening fluctuations while the ligand is bound although the presence of the ligand decreases their frequency relative to the free DNA.


    Organizational Affiliation

    Department of Chemistry, University of California, Berkeley, California 94720-1460, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

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

Download SDF File 
Download CCD File 
B
45-(3-AMINOPROPYL)-5,11,22,28,34-PENTAMETHYL-3,9,15,20,26,32,38,43-OCTAOXO-2,5,8,14,19,22,25,28,31,34,37,42,45,48-TETRADECAAZA-11-AZONIAHEPTACYCLO[42.2.1.1~4,7~.1~10,13~.1~21,24~.1~27,30~.1~33,36~]DOPENTACONTA-1(46),4(52),6,10(51),12,21(50),23,27(49),29,33(48),35,44(47)-DODECAENE
C45 H55 N16 O8
GJDFXZIHTKRSEM-UHFFFAOYSA-O
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 21 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-06-29
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance