TRIP13 regulates DNA repair pathway choice through REV7 conformational change

DNA double-strand breaks (DSBs) are repaired through homology-directed repair (HDR) or non-homologous end joining (NHEJ). BRCA1/2-deficient cancer cells cannot perform HDR, conferring sensitivity to poly(ADP-ribose) polymerase inhibitors (PARPi). However, concomitant loss of the pro-NHEJ factors 53BP1, RIF1, REV7-Shieldin (SHLD1-3) or CST-DNA polymerase alpha (Pol-α) in BRCA1-deficient cells restores HDR and PARPi resistance. Here, we identify the TRIP13 ATPase as a negative regulator of REV7. We show that REV7 exists in active 'closed' and inactive 'open' conformations, and TRIP13 catalyses the inactivating conformational change, thereby dissociating REV7-Shieldin to promote HDR. TRIP13 similarly disassembles the REV7-REV3 translesion synthesis (TLS) complex, a component of the Fanconi anaemia pathway, inhibiting error-prone replicative lesion bypass and interstrand crosslink repair. Importantly, TRIP13 overexpression is common in BRCA1-deficient cancers, confers PARPi resistance and correlates with poor prognosis. Thus, TRIP13 emerges as an important regulator of DNA repair pathway choice-promoting HDR, while suppressing NHEJ and TLS.

Errataetall:

CommentIn: Proc Natl Acad Sci U S A. 2020 Nov 10;117(45):27761-27763. - PMID 33122436

Medienart:

E-Artikel

Erscheinungsjahr:

2020

Erschienen:

2020

Enthalten in:

Zur Gesamtaufnahme - volume:22

Enthalten in:

Nature cell biology - 22(2020), 1 vom: 27. Jan., Seite 87-96

Sprache:

Englisch

Beteiligte Personen:

Clairmont, Connor S [VerfasserIn]
Sarangi, Prabha [VerfasserIn]
Ponnienselvan, Karthikeyan [VerfasserIn]
Galli, Lucas D [VerfasserIn]
Csete, Isabelle [VerfasserIn]
Moreau, Lisa [VerfasserIn]
Adelmant, Guillaume [VerfasserIn]
Chowdhury, Dipanjan [VerfasserIn]
Marto, Jarrod A [VerfasserIn]
D'Andrea, Alan D [VerfasserIn]

Links:

Volltext

Themen:

ATPases Associated with Diverse Cellular Activities
BRCA1 Protein
BRCA1 protein, human
Cell Cycle Proteins
EC 3.6.4.-
Journal Article
Mad2 Proteins
Poly(ADP-ribose) Polymerase Inhibitors
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
TRIP13 protein, human
Telomere-Binding Proteins

Anmerkungen:

Date Completed 23.04.2020

Date Revised 11.02.2024

published: Print-Electronic

CommentIn: Proc Natl Acad Sci U S A. 2020 Nov 10;117(45):27761-27763. - PMID 33122436

Citation Status MEDLINE

doi:

10.1038/s41556-019-0442-y

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM305147110