HERC2-USP20 Axis Regulates DNA Damage Checkpoint Through Claspin
Overview
Authors
Affiliations
The DNA damage response triggers cell-cycle checkpoints, DNA repair and apoptosis using multiple post-translational modifications as molecular switches. However, how ubiquitination regulates ATR signaling in response to replication stress and single-strand break is still unclear. Here, we identified the deubiquitination enzyme (DUB) USP20 as a pivotal regulator of ATR-related DDR pathway. Through screening a panel of DUBs, we identified USP20 as critical for replication stress response. USP20 is phosphorylated by ATR, resulting in disassociation of the E3 ubiquitin ligase HERC2 from USP20 and USP20 stabilization. USP20 in turn deubiquitinates and stabilizes Claspin and enhances the activation of ATR-Chk1 signaling. These findings reveal USP20 to be a novel regulator of ATR-dependent DNA damage signaling.
USP50 suppresses alternative RecQ helicase use and deleterious DNA2 activity during replication.
Mackay H, Stone H, Ronson G, Ellis K, Lanz A, Aghabi Y Nat Commun. 2024; 15(1):8102.
PMID: 39284827 PMC: 11405836. DOI: 10.1038/s41467-024-52250-4.
Single-molecule characterization of SV40 replisome and novel factors: human FPC and Mcm10.
Ouyang Y, Al-Amodi A, Tehseen M, Alhudhali L, Shirbini A, Takahashi M Nucleic Acids Res. 2024; 52(15):8880-8896.
PMID: 38967018 PMC: 11347169. DOI: 10.1093/nar/gkae565.
Autophagy dysregulation via the USP20-ULK1 axis in the HERC2-related neurodevelopmental disorder.
Sala-Gaston J, Perez-Villegas E, Armengol J, Rawlins L, Baple E, Crosby A Cell Death Discov. 2024; 10(1):163.
PMID: 38570483 PMC: 10991529. DOI: 10.1038/s41420-024-01931-6.
Friend or foe? Reciprocal regulation between E3 ubiquitin ligases and deubiquitinases.
Bolhuis D, Emanuele M, Brown N Biochem Soc Trans. 2024; 52(1):241-267.
PMID: 38414432 PMC: 11349938. DOI: 10.1042/BST20230454.
Tang J, Long G, Xiao D, Liu S, Xiao L, Zhou L MedComm (2020). 2023; 4(6):e463.
PMID: 38124786 PMC: 10732327. DOI: 10.1002/mco2.463.