R-loop-dependent promoter-proximal termination ensures genome stability.
Nature
; 621(7979): 610-619, 2023 Sep.
Article
en En
| MEDLINE
| ID: mdl-37557913
ABSTRACT
The proper regulation of transcription is essential for maintaining genome integrity and executing other downstream cellular functions1,2. Here we identify a stable association between the genome-stability regulator sensor of single-stranded DNA (SOSS)3 and the transcription regulator Integrator-PP2A (INTAC)4-6. Through SSB1-mediated recognition of single-stranded DNA, SOSS-INTAC stimulates promoter-proximal termination of transcription and attenuates R-loops associated with paused RNA polymerase II to prevent R-loop-induced genome instability. SOSS-INTAC-dependent attenuation of R-loops is enhanced by the ability of SSB1 to form liquid-like condensates. Deletion of NABP2 (encoding SSB1) or introduction of cancer-associated mutations into its intrinsically disordered region leads to a pervasive accumulation of R-loops, highlighting a genome surveillance function of SOSS-INTAC that enables timely termination of transcription at promoters to constrain R-loop accumulation and ensure genome stability.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Regiones Promotoras Genéticas
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Inestabilidad Genómica
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Terminación de la Transcripción Genética
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Estructuras R-Loop
Límite:
Humans
Idioma:
En
Revista:
Nature
Año:
2023
Tipo del documento:
Article
País de afiliación:
China