» Articles » PMID: 33503415

Chk1 Promotes Non-homologous End Joining in G1 Through Direct Phosphorylation of ASF1A

Overview
Journal Cell Rep
Publisher Cell Press
Date 2021 Jan 27
PMID 33503415
Citations 8
Authors
Affiliations
Soon will be listed here.
Abstract

The cell-cycle phase is a major determinant of repair pathway choice at DNA double strand breaks, non-homologous end joining (NHEJ), or homologous recombination (HR). Chk1 responds to genotoxic stress in S/G2 phase, but here, we report a role of Chk1 in directly promoting NHEJ repair in G1 phase. ASF1A is a histone chaperone, but it promotes NHEJ through a pathway independent of its histone-chaperone activity. Chk1 activated by ataxia telangiectasia mutated (ATM) kinase on DNA breaks in G1 promotes NHEJ through direct phosphorylation of ASF1A at Ser-166. ASF1A phosphorylated at Ser-166 interacts with the repair protein MDC1 and thus enhances MDC1's interaction with ATM and the stable localization of ATM at DNA breaks. Chk1 deficiency suppresses all steps downstream of MDC1 following a DNA break in G1, namely histone ubiquitination, 53BP1 localization to the DNA break, and NHEJ. Thus, ASF1A phosphorylation by Chk1 is essential for DNA break repair by NHEJ in G1.

Citing Articles

Tousled-like kinase loss confers PARP inhibitor resistance in BRCA1-mutated cancers by impeding non-homologous end joining repair.

Kim M, Kim B, Jeon J, Lee J, Jang H, Baek M Mol Med. 2025; 31(1):18.

PMID: 39844055 PMC: 11753094. DOI: 10.1186/s10020-025-01066-z.


Identification of mitochondrial ATP synthase as the cellular target of Ru-polypyridyl--carboline complexes by affinity-based protein profiling.

Wang W, Ling Y, Shi Y, Wu X, Su X, Li Z Natl Sci Rev. 2024; 11(8):nwae234.

PMID: 39114378 PMC: 11304990. DOI: 10.1093/nsr/nwae234.


The TLK-ASF1 histone chaperone pathway plays a critical role in IL-1β-mediated AML progression.

Lin H, Mohammadhosseini M, McClatchy J, Villamor-Paya M, Jeng S, Bottomly D Blood. 2024; 143(26):2749-2762.

PMID: 38498025 PMC: 11340594. DOI: 10.1182/blood.2023022079.


RNA-related DNA damage and repair: The role of N7-methylguanosine in the cell nucleus exposed to UV light.

Stixova L, Tichy V, Bartova E Heliyon. 2024; 10(4):e25599.

PMID: 38370261 PMC: 10869776. DOI: 10.1016/j.heliyon.2024.e25599.


Exploiting the DNA Damage Response for Prostate Cancer Therapy.

Stracker T, Osagie O, Escorcia F, Citrin D Cancers (Basel). 2024; 16(1).

PMID: 38201511 PMC: 10777950. DOI: 10.3390/cancers16010083.


References
1.
Das C, Lucia M, Hansen K, Tyler J . CBP/p300-mediated acetylation of histone H3 on lysine 56. Nature. 2009; 459(7243):113-7. PMC: 2756583. DOI: 10.1038/nature07861. View

2.
Liang X, Yuan X, Yu J, Wu Y, Li K, Sun C . Histone Chaperone ASF1A Predicts Poor Outcomes for Patients With Gastrointestinal Cancer and Drives Cancer Progression by Stimulating Transcription of β-Catenin Target Genes. EBioMedicine. 2017; 21:104-116. PMC: 5514402. DOI: 10.1016/j.ebiom.2017.06.007. View

3.
Feng L, Li N, Li Y, Wang J, Gao M, Wang W . Cell cycle-dependent inhibition of 53BP1 signaling by BRCA1. Cell Discov. 2016; 1:15019. PMC: 4860855. DOI: 10.1038/celldisc.2015.19. View

4.
Krause D, Jonnalagadda J, Gatei M, Sillje H, Zhou B, Nigg E . Suppression of Tousled-like kinase activity after DNA damage or replication block requires ATM, NBS1 and Chk1. Oncogene. 2003; 22(38):5927-37. DOI: 10.1038/sj.onc.1206691. View

5.
Kolas N, Chapman J, Nakada S, Ylanko J, Chahwan R, Sweeney F . Orchestration of the DNA-damage response by the RNF8 ubiquitin ligase. Science. 2007; 318(5856):1637-40. PMC: 2430610. DOI: 10.1126/science.1150034. View