XRCC1 prevents toxic PARP1 trapping during DNA base excision repair.
Animals
Cell Line
DNA
/ genetics
DNA Breaks, Single-Stranded
DNA Damage
/ drug effects
DNA Ligase ATP
/ metabolism
DNA Polymerase beta
/ metabolism
DNA Repair
/ drug effects
DNA-Binding Proteins
/ metabolism
Fibroblasts
/ drug effects
Humans
Poly (ADP-Ribose) Polymerase-1
/ metabolism
Poly(ADP-ribose) Polymerase Inhibitors
/ pharmacology
Poly(ADP-ribose) Polymerases
/ metabolism
Protein Binding
/ drug effects
X-ray Repair Cross Complementing Protein 1
/ metabolism
PARP inhibitors
PARP trapping
PARP1
XRCC1 protein complexes
base excision repair
single-strand breaks
Journal
Molecular cell
ISSN: 1097-4164
Titre abrégé: Mol Cell
Pays: United States
ID NLM: 9802571
Informations de publication
Date de publication:
15 07 2021
15 07 2021
Historique:
received:
07
12
2020
revised:
08
03
2021
accepted:
10
05
2021
pubmed:
9
6
2021
medline:
31
7
2021
entrez:
8
6
2021
Statut:
ppublish
Résumé
Mammalian DNA base excision repair (BER) is accelerated by poly(ADP-ribose) polymerases (PARPs) and the scaffold protein XRCC1. PARPs are sensors that detect single-strand break intermediates, but the critical role of XRCC1 during BER is unknown. Here, we show that protein complexes containing DNA polymerase β and DNA ligase III that are assembled by XRCC1 prevent excessive engagement and activity of PARP1 during BER. As a result, PARP1 becomes "trapped" on BER intermediates in XRCC1-deficient cells in a manner similar to that induced by PARP inhibitors, including in patient fibroblasts from XRCC1-mutated disease. This excessive PARP1 engagement and trapping renders BER intermediates inaccessible to enzymes such as DNA polymerase β and impedes their repair. Consequently, PARP1 deletion rescues BER and resistance to base damage in XRCC1
Identifiants
pubmed: 34102106
pii: S1097-2765(21)00366-X
doi: 10.1016/j.molcel.2021.05.009
pmc: PMC8294329
pii:
doi:
Substances chimiques
DNA-Binding Proteins
0
Poly(ADP-ribose) Polymerase Inhibitors
0
X-ray Repair Cross Complementing Protein 1
0
XRCC1 protein, human
0
DNA
9007-49-2
PARP1 protein, human
EC 2.4.2.30
Poly (ADP-Ribose) Polymerase-1
EC 2.4.2.30
Poly(ADP-ribose) Polymerases
EC 2.4.2.30
DNA Polymerase beta
EC 2.7.7.7
DNA Ligase ATP
EC 6.5.1.1
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
3018-3030.e5Subventions
Organisme : NCI NIH HHS
ID : R01 CA158073
Pays : United States
Organisme : European Research Council
ID : 694996
Pays : International
Organisme : Medical Research Council
ID : MR/P010121/1
Pays : United Kingdom
Organisme : NCI NIH HHS
ID : R01 CA226852
Pays : United States
Organisme : NCI NIH HHS
ID : R01 CA215067
Pays : United States
Organisme : NCI NIH HHS
ID : P01 CA174653
Pays : United States
Informations de copyright
Copyright © 2021 The Authors. Published by Elsevier Inc. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of interests The authors declare no competing interests.
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