Cited by 26DNA Repair MechanismsPARP inhibition in cancer therapyDNA and Nucleic Acid Chemistry

Characterization of the interactions of PARP-1 with UV-damaged DNA in vivo and in vitro

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Purohit, Nupur K., Robu, Mihaela, Shah, Rashmi G., Geacintov, Nicholas E., Shah, Girish M.·2016·Scientific Reports

Abstract

The existing methodologies for studying robust responses of poly (ADP-ribose) polymerase-1 (PARP-1) to DNA damage with strand breaks are often not suitable for examining its subtle responses to altered DNA without strand breaks, such as UV-damaged DNA. Here we describe two novel assays with which we characterized the interaction of PARP-1 with UV-damaged DNA in vivo and in vitro. Using an in situ fractionation technique to selectively remove free PARP-1 while retaining the DNA-bound PARP-1, we demonstrate a direct recruitment of the endogenous or exogenous PARP-1 to the UV-lesion site in vivo after local irradiation. In addition, using the model oligonucleotides with single UV lesion surrounded by multiple restriction enzyme sites, we demonstrate in vitro that DDB2 and PARP-1 can simultaneously bind to UV-damaged DNA and that PARP-1 casts a bilateral asymmetric footprint from −12 to +9 nucleotides on either side of the UV-lesion. These techniques will permit characterization of different roles of PARP-1 in the repair of UV-damaged DNA and also allow the study of normal housekeeping roles of PARP-1 with undamaged DNA.

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Authors
Purohit, N. K., Robu, M., Shah, R. G., Geacintov, N. E., & Shah, G. M.
Affiliations
  • Centre hospitalier universitaire de Québec (CA)
  • New York University (US)
Corresponding author
Shah, Girish M.
Venue
Scientific Reports
Published
2016-01-12
Volume
6
Issue
1
Pages
19020-19020
ISSN
2045-2322 (ISSN-L)
OpenAlex
W2236834172
Cited by
26
References
33
Citations by year
2026: 1 · 2025: 2 · 2024: 3 · 2023: 1 · 2022: 3 · 2021: 3 · 2020: 4 · 2019: 4 · 2017: 3 · 2016: 2
FWCI
1.56
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • Shastri Indo-Canadian Institute
  • National Institutes of Health
  • Canadian Institutes of Health Research (131569_1)
  • Natural Sciences and Engineering Research Council of Canada
  • National Cancer Institute (R01CA168469, CA168469)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Health Sciences › Medicine › Oncology › PARP inhibition in cancer therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
Keywords
PARP1, UV-damaged DNA, DNA damage response, DDB2, DNA repair
MeSH terms
Protein Domains, DNA, DNA Damage, Deoxyribodipyrimidine Photo-Lyase, DNA Repair, DNA-Binding Proteins, Humans, Models, Biological, Poly(ADP-ribose) Polymerases, Chemical Precipitation, Protein Binding, Pyrimidine Dimers, Ultraviolet Rays, Reproducibility of Results, DNA Footprinting, Green Fluorescent Proteins, Biocatalysis

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