The human ATR-mediated DNA damage checkpoint in a reconstituted system
Abstract
DNA damage checkpoints are signal transduction pathways that coordinate the cell cycle with other cellular responses to DNA damage in order to maintain genomic integrity. The ATR kinase is responsible for initiating the DNA damage checkpoint in response to UV-damaged DNA and incompletely replicated DNA. We have recently established an in vitro system that recapitulates most but not all features of the human ATR-mediated DNA damage checkpoint response. With this system we have shown that damaged DNA can be a direct signal for ATR activation, and that TopBP1 specifically stimulates ATR in the presence of damaged DNA under physiological ionic strength conditions. This system provides a powerful tool to gain insight into the molecular mechanism of the ATR pathway. Here we describe preparation of the checkpoint components and our specific kinase assay in more detail.
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ATR in complex with ATRIP binds RPA-coated single-stranded DNA through an ATRIP-RPA interaction, and ATRIP activates ATR checkpoint kinase activity.
“ATR in complex with its nuclear binding partner ATR-interacting protein (ATRIP) binds to this RPA-coated ssDNA via an ATRIP-RPA interaction. ATRIP also serves to activate the checkpoint kinase activity of ATR 4, 27–30.”
From Xeroderma Pigmentosa Group A (XPA), Nucleotide Excision Repair and Regulation by ATR in Response to Ultraviolet Irradiation (2017) · cites this paper as [28]
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- Authors
- Choi, J.-H., Sancar, A., & Lindsey-Boltz, L. A.
- Affiliations
- University of North Carolina at Chapel Hill (US)
- ORCID
- Sancar, Aziz
- Venue
- Methods
- Publisher
- Elsevier BV
- Published
- 2009-05
- Volume
- 48
- Issue
- 1
- Pages
- 3-7
- ISSN
- 1046-2023 (ISSN-L)
- OpenAlex
- W2058564277
- Cited by
- 23
- References
- 30
- Citations by year
- 2024: 1 · 2017: 1 · 2016: 1 · 2015: 1 · 2014: 4 · 2013: 3 · 2012: 2
- FWCI
- 1.61
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Methods (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institute of General Medical Sciences (R01GM032833)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
- Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
- Keywords
- ATR kinase, DNA damage checkpoint, TopBP1, UV-induced DNA damage, in vitro reconstitution, DNA damage signaling, kinase activity assay, cell cycle checkpoints, genome stability
- MeSH terms
- Checkpoint Kinase 1, Carrier Proteins, Cell-Free System, DNA, DNA Damage, DNA-Binding Proteins, Glutathione Transferase, HeLa Cells, Histidine, Humans, Models, Biological, Molecular Weight, Nuclear Proteins, Osmolar Concentration, Phosphorylation, Protein Binding, Protein Kinases, Recombinant Proteins, Substrate Specificity, Silver Staining, Protein Serine-Threonine Kinases, Protein Structure, Tertiary, Cell Cycle Proteins, Amino Acid Motifs, Adaptor Proteins, Signal Transducing, Ataxia Telangiectasia Mutated Proteins
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