4WU9

Structure of cisPtNAP-NCP145


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Stereochemical control of nucleosome targeting by platinum-intercalator antitumor agents.

Chua, E.Y.Davey, G.E.Chin, C.F.Droge, P.Ang, W.H.Davey, C.A.

(2015) Nucleic Acids Res. 43: 5284-5296

  • DOI: 10.1093/nar/gkv356
  • Primary Citation of Related Structures:  4WU8

  • PubMed Abstract: 
  • Platinum-based anticancer drugs act therapeutically by forming DNA adducts, but suffer from severe toxicity and resistance problems, which have not been overcome in spite of decades of research. And yet defined chromatin targets have generally not be ...

    Platinum-based anticancer drugs act therapeutically by forming DNA adducts, but suffer from severe toxicity and resistance problems, which have not been overcome in spite of decades of research. And yet defined chromatin targets have generally not been considered in the drug development process. Here we designed novel platinum-intercalator species to target a highly deformed DNA site near the nucleosome center. Between two seemingly similar structural isomers, we find a striking difference in DNA site selectivity in vitro, which comes about from stereochemical constraints that limit the reactivity of the trans isomer to special DNA sequence elements while still allowing the cis isomer to efficiently form adducts at internal sites in the nucleosome core. This gives the potential for controlling nucleosome site targeting in vivo, which would engender sensitivity to epigenetic distinctions and in particular cell type/status-dependent differences in nucleosome positioning. Moreover, while both compounds yield very similar DNA-adduct structures and display antitumor cell activity rivalling that of cisplatin, the cis isomer, relative to the trans, has a much more rapid cytotoxic effect and distinct impact on cell function. The novel stereochemical principles for controlling DNA site selectivity we discovered could aid in the design of improved site discriminating agents.


    Organizational Affiliation

    School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Histone H3.2
A, E
135Xenopus laevisN/A
Find proteins for P84233 (Xenopus laevis)
Go to UniProtKB:  P84233
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Histone H4
B, F
102Xenopus laevisN/A
Find proteins for P62799 (Xenopus laevis)
Go to UniProtKB:  P62799
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Histone H2A type 1
C, G
129Xenopus laevisN/A
Find proteins for P06897 (Xenopus laevis)
Go to UniProtKB:  P06897
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Histone H2B 1.1
D, H
125Xenopus laevisN/A
Find proteins for P02281 (Xenopus laevis)
Go to UniProtKB:  P02281
Entity ID: 5
MoleculeChainsLengthOrganism
DNA (145-MER)I145synthetic construct
Entity ID: 6
MoleculeChainsLengthOrganism
DNA (145-MER)J145synthetic construct
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

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Download CCD File 
C, H
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
MG
Query on MG

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Download CCD File 
E
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
CX8
Query on CX8

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Download CCD File 
I, J
[2-{3-[(2-{[2-(amino-kappaN)ethyl]amino-kappaN}ethyl)amino-kappaN]propyl}-1H-benzo[de]isoquinoline-1,3(2H)-dionato(3-)]platinum
C19 H21 N4 O2 Pt
XUMMUUAWYGZUAF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.216 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 106.570α = 90.00
b = 109.330β = 90.00
c = 181.280γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-09-02
    Type: Initial release