Document Type
Article
Publication Date
2013
Keywords
Chromatin, DNA Binding Protein, DNA Damage Response, DNA Repair, DNA Replication, ATR, SNF2H, SNF2L, iPOND
Digital Object Identifier (DOI)
https://doi.org/10.1074/jbc.M113.511337
Abstract
Both DNA and chromatin need to be duplicated during each cell division cycle. Replication happens in the context of defects in the DNA template and other forms of replication stress that present challenges to both genetic and epigenetic inheritance. The replication machinery is highly regulated by replication stress responses to accomplish this goal. To identify important replication and stress response proteins, we combined isolation of proteins on nascent DNA (iPOND) with quantitative mass spectrometry. We identified 290 proteins enriched on newly replicated DNA at active, stalled, and collapsed replication forks. Approximately 16% of these proteins are known replication or DNA damage response proteins. Genetic analysis indicates that several of the newly identified proteins are needed to facilitate DNA replication, especially under stressed conditions. Our data provide a useful resource for investigators studying DNA replication and the replication stress response and validate the use of iPOND combined with mass spectrometry as a discovery tool.
Background: DNA replication and the replication stress response require the coordinated actions of many proteins.
Results: iPOND coupled with mass spectrometry identified 290 proteins associated with active, stalled, or collapsed replication forks.
Conclusion: iPOND-MS is a useful discovery tool.
Significance: The data increase our understanding of the network of proteins involved in DNA replication and the replication stress response.
Rights Information
This work is licensed under a Creative Commons Attribution 4.0 License.
Was this content written or created while at USF?
Yes
Citation / Publisher Attribution
Journal of Biological Chemistry, v. 288, issue 44, p. 31458-31467
Scholar Commons Citation
Sirbu, Bianca M.; McDonald, W. Hayes; Dungrawala, Huzefa; Badu-Nkansah, Akosua; Kavanaugh, Gina M.; Chen, Yaoyi; Tabb, David L.; and Cortez, David, "Identification of Proteins at Active, Stalled, and Collapsed Replication Forks Using Isolation of Proteins on Nascent DNA (iPOND) Coupled with Mass Spectrometry" (2013). Molecular Biosciences Faculty Publications. 101.
https://digitalcommons.usf.edu/bcm_facpub/101
