8GP7 image
Entry Detail
PDB ID:
8GP7
Keywords:
Title:
Structure of Trioxacarcin A covalently bound to RET G4-DNA
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2022-08-25
Release Date:
2023-09-06
Method Details:
Experimental Method:
Conformers Calculated:
100
Conformers Submitted:
20
Selection Criteria:
structures with the lowest energy
Macromolecular Entities
Polymer Type:polydeoxyribonucleotide
Description:DNA (5'-D(*GP*GP*GP*GP*CP*GP*GP*GP*GP*CP*GP*GP*GP*GP*CP*GP*GP*GP*GP*T)-3')
Chain IDs:A
Chain Length:20
Number of Molecules:1
Biological Source:synthetic construct
Ligand Molecules
Primary Citation
Trioxacarcin A Interactions with G-Quadruplex DNA Reveal Its Potential New Targets as an Anticancer Agent.
J.Med.Chem. 66 6798 6810 (2023)
PMID: 37154782 DOI: 10.1021/acs.jmedchem.3c00178

Abstact

Trioxacarcin (TXN) A was reported to be an anticancer agent through alkylation of dsDNA. G-quadruplex DNA (G4-DNA) is frequently formed in the promoter regions of oncogenes and the ends of telomerase genes, considered as promising drug targets for anticancer therapy. There are no reports about TXN A interactions with G4-DNA. Here, we tested TXN A's interactions with several G4-DNA oligos with parallel, antiparallel, or hybrid folding, respectively. We demonstrated that TXN A preferred to alkylate one flexible guanine in the loops of parallel G4-DNA. The position of the alkylated guanine is in favor of interactions of G4-DNA with TXN A. The structure of TXN A covalently bound RET G4-DNA indicated that TXN A alkylation on RET G4-DNA stabilizes the G4-DNA conformation. These studies opened a new window of how TXN A interacted with G4-DNA, which might hint a new mode of its function as an anticancer agent.

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Primary Citation of related structures