FANCM regulates repair pathway choice at stalled replication forks.
Mol Cell
; 81(11): 2428-2444.e6, 2021 06 03.
Article
en En
| MEDLINE
| ID: mdl-33882298
ABSTRACT
Repair pathway "choice" at stalled mammalian replication forks is an important determinant of genome stability; however, the underlying mechanisms are poorly understood. FANCM encodes a multi-domain scaffolding and motor protein that interacts with several distinct repair protein complexes at stalled forks. Here, we use defined mutations engineered within endogenous Fancm in mouse embryonic stem cells to study how Fancm regulates stalled fork repair. We find that distinct FANCM repair functions are enacted by molecularly separable scaffolding domains. These findings define FANCM as a key mediator of repair pathway choice at stalled replication forks and reveal its molecular mechanism. Notably, mutations that inactivate FANCM ATPase function disable all its repair functions and "trap" FANCM at stalled forks. We find that Brca1 hypomorphic mutants are synthetic lethal with Fancm null or Fancm ATPase-defective mutants. The ATPase function of FANCM may therefore represent a promising "druggable" target for therapy of BRCA1-linked cancer.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
ADN Helicasas
/
Proteína BRCA1
/
Reparación del ADN
/
Replicación del ADN
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Células Madre Embrionarias de Ratones
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Mutaciones Letales Sintéticas
Límite:
Animals
/
Humans
Idioma:
En
Revista:
Mol Cell
Asunto de la revista:
BIOLOGIA MOLECULAR
Año:
2021
Tipo del documento:
Article
País de afiliación:
Estados Unidos