5DNN image
Deposition Date 2015-09-10
Release Date 2016-09-14
Last Version Date 2023-11-08
Entry Detail
PDB ID:
5DNN
Title:
Nucleosome core particle containing adducts of gold(I)-triethylphosphane and ruthenium(II)-toluene PTA complexes
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.80 Å
R-Value Free:
0.23
R-Value Work:
0.21
R-Value Observed:
0.21
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Histone H3.2
Chain IDs:A, E
Chain Length:135
Number of Molecules:2
Biological Source:Xenopus laevis
Polymer Type:polypeptide(L)
Molecule:Histone H4
Chain IDs:B, F
Chain Length:102
Number of Molecules:2
Biological Source:Xenopus laevis
Polymer Type:polypeptide(L)
Molecule:Histone H2A
Chain IDs:C, G
Chain Length:128
Number of Molecules:2
Biological Source:Xenopus laevis
Polymer Type:polypeptide(L)
Molecule:Histone H2B 1.1
Chain IDs:D, H
Chain Length:125
Number of Molecules:2
Biological Source:Xenopus laevis
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (145-MER)
Chain IDs:I
Chain Length:145
Number of Molecules:1
Biological Source:synthetic construct
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (145-MER)
Chain IDs:J
Chain Length:145
Number of Molecules:1
Biological Source:synthetic construct
Primary Citation
Allosteric cross-talk in chromatin can mediate drug-drug synergy
Nat Commun 8 14860 14860 (2017)
PMID: 28358030 DOI: 10.1038/ncomms14860

Abstact

Exploitation of drug-drug synergism and allostery could yield superior therapies by capitalizing on the immensely diverse, but highly specific, potential associated with the biological macromolecular landscape. Here we describe a drug-drug synergy mediated by allosteric cross-talk in chromatin, whereby the binding of one drug alters the activity of the second. We found two unrelated drugs, RAPTA-T and auranofin, that yield a synergistic activity in killing cancer cells, which coincides with a substantially greater number of chromatin adducts formed by one of the compounds when adducts from the other agent are also present. We show that this occurs through an allosteric mechanism within the nucleosome, whereby defined histone adducts of one drug promote reaction of the other drug at a distant, specific histone site. This opens up possibilities for epigenetic targeting and suggests that allosteric modulation in nucleosomes may have biological relevance and potential for therapeutic interventions.

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Primary Citation of related structures