Cited by 72DNA Repair MechanismsPARP inhibition in cancer therapyGenetic factors in colorectal cancer

Poly(ADP‐ribose)‐mediated interplay of XPA and PARP 1 leads to reciprocal regulation of protein function

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Fischer, Jan M. F., Popp, Oliver, Gebhard, Daniel, Veith, Sebastian, Fischbach, Arthur, Beneke, Sascha, Leitenstorfer, Alfred, Bergemann, Jörg +4 more·2014·The FEBS Journal

Abstract

Poly(ADP‐ribose) (PAR) is a complex and reversible post‐translational modification that controls protein function and localization through covalent modification of, or noncovalent binding to target proteins. Previously, we and others characterized the noncovalent, high‐affinity binding of the key nucleotide excision repair (NER) protein XPA to PAR. In the present study, we address the functional relevance of this interaction. First, we confirm that pharmacological inhibition of cellular poly(ADP‐ribosyl)ation (PAR ylation) impairs NER efficacy. Second, we demonstrate that the XPA–PAR interaction is mediated by specific basic amino acids within a highly conserved PAR‐binding motif, which overlaps the DNA damage‐binding protein 2 (DDB 2) and transcription factor II H (TFIIH) interaction domains of XPA. Third, biochemical studies reveal a mutual regulation of PARP 1 and XPA functions showing that, on the one hand, the XPA–PAR interaction lowers the DNA binding affinity of XPA, whereas, on the other hand, XPA itself strongly stimulates PARP 1 enzymatic activity. Fourth, microirradiation experiments in U2 OS cells demonstrate that PARP inhibition alters the recruitment properties of XPA‐green fluorescent protein to sites of laser‐induced DNA damage. In conclusion, our results reveal that XPA and PARP 1 regulate each other in a reciprocal and PAR‐dependent manner, potentially acting as a fine‐tuning mechanism for the spatio‐temporal regulation of the two factors during NER.

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Authors
Fischer, J. M. F., Popp, O., Gebhard, D., Veith, S., Fischbach, A., Beneke, S., Leitenstorfer, A., Bergemann, J., Scheffner, M., Ferrando‐May, E., Mangerich, A., & Bürkle, A.
Affiliations
  • University of Konstanz (DE)
  • Albstadt-Sigmaringen University (DE)
Corresponding author
Mangerich, Aswin
Venue
The FEBS Journal
Publisher
Wiley
Published
2014-07-21
Volume
281
Issue
16
Pages
3625-3641
ISSN
  • 1742-464X (ISSN-L)
  • 1742-4658
OpenAlex
W2077377040
Cited by
72
References
53
Citations by year
2026: 2 · 2025: 3 · 2024: 3 · 2023: 5 · 2022: 5 · 2021: 7 · 2020: 7 · 2019: 5 · 2018: 4 · 2017: 8 · 2016: 11 · 2015: 10 · 2014: 2
FWCI
4.24
Type
journal article
Language
en
Open access
Locations
  • FEBS Journal (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • KOPS (University of Konstanz) (submittedVersion, cc-by)
Funders
Deutsche Forschungsgemeinschaft
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Health Sciences › Medicine › Oncology › PARP inhibition in cancer therapy
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Genetic factors in colorectal cancer
Keywords
poly(ADP-ribose), poly(ADP-ribosyl)ation, XPA, PARP1, nucleotide excision repair, DDB2, TFIIH, DNA damage response, PARP inhibition, DNA binding affinity, protein-protein interaction, U2OS cells
MeSH terms
Poly (ADP-Ribose) Polymerase-1, Amino Acid Sequence, DNA Repair, HeLa Cells, Humans, Kinetics, Molecular Sequence Data, Poly Adenosine Diphosphate Ribose, Poly(ADP-ribose) Polymerases, Protein Binding, Protein Processing, Post-Translational, Consensus Sequence, Xeroderma Pigmentosum Group A Protein, Sf9 Cells

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