3QSC

The first crystal structure of a human telomeric G-quadruplex DNA bound to a metal-containing ligand (a copper complex)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Molecular basis of structure-activity relationships between salphen metal complexes and human telomeric DNA quadruplexes.

Campbell, N.H.Karim, N.H.Parkinson, G.N.Gunaratnam, M.Petrucci, V.Todd, A.K.Vilar, R.Neidle, S.

(2012) J.Med.Chem. 55: 209-222

  • DOI: 10.1021/jm201140v
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The first X-ray crystal structures of nickel(II) and copper(II) salphen metal complexes bound to a quadruplex DNA are presented. Two structures have been determined and show that these salphen-metal complexes bind to human telomeric quadruplexes by e ...

    The first X-ray crystal structures of nickel(II) and copper(II) salphen metal complexes bound to a quadruplex DNA are presented. Two structures have been determined and show that these salphen-metal complexes bind to human telomeric quadruplexes by end-stacking, with the metal in each case almost in line with the potassium ion channel. Quadruplex and duplex DNA binding is presented for these two and other related salphen complexes, all with side-chains terminating in pyrrolidino end-groups and differing patterns of substitution on the salphen core. The crystal structures are able to provide rationalizations for the structure-activity data, and in particular for the superior quadruplex-binding of the nickel complexes compared to that of the copper-containing ones. The complexes show significant antiproliferative activity for the compounds in a panel of cancer cell lines. They also show telomerase inhibitory activity in the telomerase TRAP-LIG assay.


    Organizational Affiliation

    CRUK Biomolecular Structure Group, The School of Pharmacy, University of London, 29-29 Brunswick Square, London WC1N 1AX, U.K.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsLengthOrganism
5'-D(*AP*GP*GP*GP*TP*(BRU)P*AP*GP*GP*GP*TP*T)-3'X12N/A
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download SDF File 
Download CCD File 
X
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
CUF
Query on CUF

Download SDF File 
Download CCD File 
X
[2,2'-{(4,5-difluorobenzene-1,2-diyl)bis[(nitrilo-kappaN)methylylidene]}bis{5-[2-(piperidin-1-yl)ethoxy]phenolato-kappaO}(2-)]copper (II)
N,N-Bis[4-[[1-(2-ethyl)piperidine]oxy]salicylidene]-4,5-difluoro-1,2-phenylenediamine-Copper (II)
C34 H38 Cu F2 N4 O4
AXRKNIOXRLONLO-OHUAMDITSA-L
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
BRU
Query on BRU
X
DNA LINKINGC9 H12 Br N2 O8 PDU
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.213 
  • Space Group: C 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 43.753α = 90.00
b = 54.786β = 90.00
c = 33.430γ = 90.00
Software Package:
Software NamePurpose
SHELXphasing
ADSCdata collection
SCALAdata scaling
REFMACrefinement
SHELXDphasing
MOSFLMdata reduction
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-12-07
    Type: Initial release
  • Version 1.1: 2012-04-18
    Type: Database references