Work

Site-specific Phosphorylation Dynamics of the Nuclear Proteome during the DNA Damage Response

Year: 2010

Type: article

Abstract: To investigate the temporal regulation of the DNA damage response, we applied quantitative mass spectrometry-based proteomics to measure site-specific phosphorylation changes of nuclear proteins after ionizing radiation. We profiled 5204 phosphorylation sites at five time points following DNA damage of which 594 sites on 209 proteins were observed to be regulated more than 2-fold. Of the 594 sites, 372 are novel phosphorylation sites primarily of nuclear origin. The 594 sites could be classified to distinct temporal profiles. Sites regulated shortly after radiation were enriched in the ataxia telangiectasia mutated (ATM) kinase SQ consensus sequence motif and a novel SXXQ motif. Importantly, in addition to induced phosphorylation, we identified a considerable group of sites that undergo DNA damage-induced dephosphorylation. Together, our data extend the number of known phosphorylation sites regulated by DNA damage, provides so far unprecedented temporal dissection of DNA damage-modified phosphorylation events, and elucidate the cross-talk between different types of post-translational modifications in the dynamic regulation of a multifaceted DNA damage response.

Source: Molecular & Cellular Proteomics

DOI: 10.1074/mcp.m900616-mcp200

Authors: Martin V. Bennetzen, Dorthe Helena Larsen, Jakob Bunkenborg, Jiri Bartek, Jiri Lukas, Jens S. Andersen

Institutions: University of Southern Denmark, Danish Cancer Society, Institute of Molecular and Translational Medicine, Palacký University Olomouc

Language: English

Topic: DNA Repair Mechanisms

Subfield: Molecular Biology

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

Open Access status: hybrid

Estimated APC paid: $3,430

Funder: European Commission