Characterization of DNA ADP-ribosyltransferase activities of PARP2 and PARP3: new insights into DNA ADP-ribosylation
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Date
2018-01
Authors
Zarkovic, Gabriella
Belousova, Ekaterina
Talhaoui, Ibtissam
Saint-Pierre, Christine
Kutuzov, Mikhail M.
Matkarimov, Bakhyt
Biard, Denis
Gasparutto, Didier
Lavrik, Olga I.
Ishchenko, Alexander A.
Journal Title
Journal ISSN
Volume Title
Publisher
Oxford University Press
Abstract
Poly(ADP-ribose) polymerases (PARPs) act as DNA break sensors and catalyze the synthesis of polymers of ADP-ribose (PAR) covalently attached to acceptor proteins at DNA damage sites. It has been demonstrated that both mammalian PARP1 and PARP2 PARylate double-strand break termini in DNA oligonucleotide duplexes in vitro. Here, we show that mammalian PARP2 and PARP3 can PARylate and mono(ADP-ribosyl)ate (MARylate), respectively, 5′- and 3′-terminal phosphate residues at double- and single-strand break termini of a DNA molecule containing multiple strand breaks. PARP3-catalyzed DNA MARylation can be considered a new type of reversible post-replicative DNA modification. According to DNA substrate specificity of PARP3 and PARP2, we propose a putative mechanistic model of PARP-catalyzed strand break–oriented ADP-ribosylation of DNA termini. Notably, PARP-mediated DNA ADP-ribosylation can be more effective than PARPs’ auto-ADP-ribosylation depending on the DNA substrates and reaction conditions used. Finally, we show an effective PARP3- or PARP2-catalyzed ADP-ribosylation of high-molecular-weight (∼3-kb) DNA molecules, PARP-mediated DNA PARylation in cell-free extracts and a persisting signal of anti-PAR antibodies in a serially purified genomic DNA from bleomycin-treated poly(ADP-ribose) glycohydrolase-depleted HeLa cells. These results suggest that certain types of complex DNA breaks can be effectively ADP-ribosylated by PARPs in cellular response to DNA damage.
Description
https://academic.oup.com/nar/article/46/5/2417/4807332
Keywords
genome integrity, repair and replication, PARP2, PARP3, Research Subject Categories::MEDICINE
Citation
Zarkovic, G., Belousova, E. A., Talhaoui, I., Saint-Pierre, C., Kutuzov, M. M., Matkarimov, B. T., Biard, D., Gasparutto, D., Lavrik, O. I., & Ishchenko, A. A. (2018). Characterization of DNA ADP-ribosyltransferase activities of PARP2 and PARP3: new insights into DNA ADP-ribosylation. Nucleic Acids Research, 46(5), 2417–2431. https://doi.org/10.1093/nar/gkx1318