PRP19 Transforms into a Sensor of RPA-ssDNA after DNA Damage and Drives ATR Activation via a Ubiquitin-Mediated Circuitry

PRP19 is a ubiquitin ligase involved in pre-mRNA splicing and the DNA damage response (DDR). Although the role for PRP19 in splicing is well characterized, its role in the DDR remains elusive. Through a proteomic screen for proteins that interact with RPA-coated single-stranded DNA (RPA-ssDNA), we i...

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Bibliographic Details
Published in:Molecular cell 2014-01, Vol.53 (2), p.235-246
Main Authors: Maréchal, Alexandre, Li, Ju-Mei, Ji, Xiao Ye, Wu, Ching-Shyi, Yazinski, Stephanie A., Nguyen, Hai Dang, Liu, Shizhou, Jiménez, Amanda E., Jin, Jianping, Zou, Lee
Format: Article
Language:English
Subjects:
Adaptor Proteins, Signal Transducing - metabolism
Ataxia Telangiectasia Mutated Proteins - metabolism
Ataxia Telangiectasia Mutated Proteins - physiology
Checkpoint Kinase 1
DNA Damage
DNA Repair
DNA Repair Enzymes - physiology
DNA Replication
DNA, Single-Stranded - metabolism
DNA-Binding Proteins - metabolism
HeLa Cells
Humans
Nuclear Proteins - physiology
Phosphorylation
Protein Kinases - metabolism
Replication Protein A - metabolism
Replication Protein A - physiology
RNA Splicing Factors
Signal Transduction
Ubiquitin - metabolism
Ubiquitin - physiology
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Summary:PRP19 is a ubiquitin ligase involved in pre-mRNA splicing and the DNA damage response (DDR). Although the role for PRP19 in splicing is well characterized, its role in the DDR remains elusive. Through a proteomic screen for proteins that interact with RPA-coated single-stranded DNA (RPA-ssDNA), we identified PRP19 as a sensor of DNA damage. PRP19 directly binds RPA and localizes to DNA damage sites via RPA, promoting RPA ubiquitylation in a DNA-damage-induced manner. PRP19 facilitates the accumulation of ATRIP, the regulatory partner of the ataxia telangiectasia mutated and Rad3-related (ATR) kinase, at DNA damage sites. Depletion of PRP19 compromised the phosphorylation of ATR substrates, recovery of stalled replication forks, and progression of replication forks on damaged DNA. Importantly, PRP19 mutants that cannot bind RPA or function as an E3 ligase failed to support the ATR response, revealing that PRP19 drives ATR activation by acting as an RPA-ssDNA-sensing ubiquitin ligase during the DDR. [Display omitted] •PRP19 is identified as a sensor of RPA-ssDNA from a proteomic screen•PRP19 recognizes DNA damage via its interaction with RPA•PRP19 regulates ATR activation as a ubiquitin ligase•PRP19 promotes RPA ubiquitylation and ATRIP recruitment after DNA damage
ISSN:1097-2765
1097-4164
DOI:10.1016/j.molcel.2013.11.002