Cited by 160DNA Repair MechanismsUbiquitin and proteasome pathwaysNuclear Structure and Function

The DOI matches its Crossref record; 60 of the 60 references it cites were found in a registry or an index.

DNA repair factor XPC is modified by SUMO-1 and ubiquitin following UV irradiation.

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Wang, Q.-E.·2005·Nucleic Acids Research

Abstract

Nucleotide excision repair (NER) is the major DNA repair process that removes diverse DNA lesions including UV-induced photoproducts. There are more than 20 proteins involved in NER. Among them, XPC is thought to be one of the first proteins to recognize DNA damage during global genomic repair (GGR), a sub-pathway of NER. In order to study the mechanism through which XPC participates in GGR, we investigated the possible modifications of XPC protein upon UV irradiation in mammalian cells. Western blot analysis of cell lysates from UV-irradiated normal human fibroblast, prepared by direct boiling in an SDS lysis buffer, showed several anti-XPC antibody-reactive bands with molecular weight higher than the original XPC protein. The reciprocal immunoprecipitation and siRNA transfection analysis demonstrated that XPC protein is modified by SUMO-1 and ubiquitin. By using several NER-deficient cell lines, we found that DDB2 and XPA are required for UV-induced XPC modifications. Interestingly, both the inactivation of ubiquitylation and the treatment of proteasome inhibitors quantitatively inhibited the UV-induced XPC modifications. Furthermore, XPC protein is degraded significantly following UV irradiation in XP-A cells in which sumoylation of XPC does not occur. Taken together, we conclude that XPC protein is modified by SUMO-1 and ubiquitin following UV irradiation and these modifications require the functions of DDB2 and XPA, as well as the ubiquitin-proteasome system. Our results also suggest that at least one function of UV-induced XPC sumoylation is related to the stabilization of XPC protein.

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  1. [46]Desterro J.M. Rodriguez M.S. Hay R.T. SUMO-1 modification of IkappaBalpha inhibits NF-kappaB activation Mol. Cell 1998 2 233 239 9734360

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Metadata

Authors
Wang, Q.-E.
Affiliations
The Ohio State University (US)
Corresponding author
Wang, Q.-E.
Venue
Nucleic Acids Research
Published
2005-07-21
Volume
33
Issue
13
Pages
4023-4034
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W2154098640
Cited by
160
References
59
Citations by year
2026: 2 · 2025: 2 · 2024: 2 · 2023: 6 · 2022: 2 · 2021: 9 · 2020: 6 · 2019: 7 · 2018: 2 · 2017: 8 · 2016: 9 · 2015: 13 · 2014: 11 · 2013: 3 · 2012: 7
FWCI
4.27
Type
journal article
Language
en
Open access
Licence
other-oa
Locations
  • Nucleic Acids Research (publishedVersion, other-oa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01es006074-05)
  • National Cancer Institute (R01CA093413, CA93413)
  • National Institute of Environmental Health Sciences (R01ES012991, ES12991, ES 6074)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nuclear Structure and Function
Keywords
XPC, SUMO1, ubiquitination, SUMOylation, nucleotide excision repair, UV-induced DNA damage, DDB2, XPA, ubiquitin-proteasome system, protein stabilization
MeSH terms
Cell Line, DNA-Binding Proteins, Fibroblasts, Humans, Ultraviolet Rays, Ubiquitin, SUMO-1 Protein, Proteasome Endopeptidase Complex, Xeroderma Pigmentosum Group A Protein

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