6VKO image
Deposition Date 2020-01-21
Release Date 2020-06-17
Last Version Date 2024-11-13
Entry Detail
PDB ID:
6VKO
Title:
Crystal Structure of human PARP-1 CAT domain bound to inhibitor UKTT15
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.80 Å
R-Value Free:
0.31
R-Value Work:
0.28
R-Value Observed:
0.28
Space Group:
C 1 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Poly [ADP-ribose] polymerase 1
Gene (Uniprot):PARP1
Chain IDs:A, B, C, D
Chain Length:372
Number of Molecules:4
Biological Source:Homo sapiens
Primary Citation
Structural basis for allosteric PARP-1 retention on DNA breaks.
Science 368 ? ? (2020)
PMID: 32241924 DOI: 10.1126/science.aax6367

Abstact

The success of poly(ADP-ribose) polymerase-1 (PARP-1) inhibitors (PARPi) to treat cancer relates to their ability to trap PARP-1 at the site of a DNA break. Although different forms of PARPi all target the catalytic center of the enzyme, they have variable abilities to trap PARP-1. We found that several structurally distinct PARPi drive PARP-1 allostery to promote release from a DNA break. Other inhibitors drive allostery to retain PARP-1 on a DNA break. Further, we generated a new PARPi compound, converting an allosteric pro-release compound to a pro-retention compound and increasing its ability to kill cancer cells. These developments are pertinent to clinical applications where PARP-1 trapping is either desirable or undesirable.

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