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Hassanain H, Tseitline D, Hacohen T, Yifrach A, Kirshenbaum A, Lavi B, Parnas A, Adar S. A Practical Site-specific Method for the Detection of Bulky DNA Damages. J Mol Biol 2024; 436:168450. [PMID: 38246411 DOI: 10.1016/j.jmb.2024.168450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 01/16/2024] [Accepted: 01/16/2024] [Indexed: 01/23/2024]
Abstract
Helix-distorting DNA damages block RNA and DNA polymerase, compromising cell function and fate. In human cells, these damages are removed primarily by nucleotide excision repair (NER). Here, we describe damage-sensing PCR (dsPCR), a PCR-based method for the detection of these DNA damages. Exposure to DNA damaging agents results in lower PCR signal in comparison to non-damaged DNA, and repair is measured as the restoration of PCR signal over time. We show that the method successfully detects damages induced by ultraviolet (UV) radiation, by the carcinogenic component of cigarette smoke benzo[a]pyrene diol epoxide (BPDE) and by the chemotherapeutic drug cisplatin. Damage removal measured by dsPCR in a heterochromatic region is less efficient than in a transcribed and accessible region. Furthermore, lower repair is measured in repair-deficient knock-out cells. This straight-forward method could be applied by non-DNA repair experts to study the involvement of their gene-of-interest in repair. Furthermore, this method is fully amenable for high-throughput screening of DNA repair activity.
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Affiliation(s)
- Hiba Hassanain
- Department of Microbiology and Molecular Genetics, The Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem 9112102, Israel
| | - Dana Tseitline
- Department of Microbiology and Molecular Genetics, The Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem 9112102, Israel
| | - Tamar Hacohen
- Department of Microbiology and Molecular Genetics, The Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem 9112102, Israel
| | - Adi Yifrach
- Department of Microbiology and Molecular Genetics, The Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem 9112102, Israel
| | - Ayala Kirshenbaum
- Department of Microbiology and Molecular Genetics, The Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem 9112102, Israel
| | - Bar Lavi
- Department of Microbiology and Molecular Genetics, The Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem 9112102, Israel
| | - Avital Parnas
- Department of Microbiology and Molecular Genetics, The Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem 9112102, Israel
| | - Sheera Adar
- Department of Microbiology and Molecular Genetics, The Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem 9112102, Israel.
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Kose C, Cao X, Dewey EB, Malkoç M, Adebali O, Sekelsky J, Lindsey-Boltz LA, Sancar A. Cross-species investigation into the requirement of XPA for nucleotide excision repair. Nucleic Acids Res 2024; 52:677-689. [PMID: 37994737 PMCID: PMC10810185 DOI: 10.1093/nar/gkad1104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 10/25/2023] [Accepted: 11/01/2023] [Indexed: 11/24/2023] Open
Abstract
After reconstitution of nucleotide excision repair (excision repair) with XPA, RPA, XPC, TFIIH, XPF-ERCC1 and XPG, it was concluded that these six factors are the minimal essential components of the excision repair machinery. All six factors are highly conserved across diverse organisms spanning yeast to humans, yet no identifiable homolog of the XPA gene exists in many eukaryotes including green plants. Nevertheless, excision repair is reported to be robust in the XPA-lacking organism, Arabidopsis thaliana, which raises a fundamental question of whether excision repair could occur without XPA in other organisms. Here, we performed a phylogenetic analysis of XPA across all species with annotated genomes and then quantitatively measured excision repair in the absence of XPA using the sensitive whole-genome qXR-Seq method in human cell lines and two model organisms, Caenorhabditis elegans and Drosophila melanogaster. We find that although the absence of XPA results in inefficient excision repair and UV-sensitivity in humans, flies, and worms, excision repair of UV-induced DNA damage is detectable over background. These studies have yielded a significant discovery regarding the evolution of XPA protein and its mechanistic role in nucleotide excision repair.
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Affiliation(s)
- Cansu Kose
- Department of Biochemistry and Biophysics, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Xuemei Cao
- Department of Biochemistry and Biophysics, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Evan B Dewey
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Mustafa Malkoç
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Türkiye
| | - Ogün Adebali
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Türkiye
- Department of Computational Science-Biological Sciences, TÜBITAK Research Institute for Fundamental Sciences, Gebze, Türkiye
| | - Jeff Sekelsky
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Laura A Lindsey-Boltz
- Department of Biochemistry and Biophysics, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Aziz Sancar
- Department of Biochemistry and Biophysics, University of North Carolina School of Medicine, Chapel Hill, NC, USA
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Popov AA, Petruseva IO, Naumenko NV, Lavrik OI. Methods for Assessment of Nucleotide Excision Repair Efficiency. BIOCHEMISTRY. BIOKHIMIIA 2023; 88:1844-1856. [PMID: 38105203 DOI: 10.1134/s0006297923110147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 08/30/2023] [Accepted: 08/31/2023] [Indexed: 12/19/2023]
Abstract
Nucleotide excision repair (NER) is responsible for removing a wide variety of bulky adducts from DNA, thus contributing to the maintenance of genome stability. The efficiency with which proteins of the NER system recognize and remove bulky adducts depends on many factors and is of great clinical and diagnostic significance. The review examines current concepts of the NER system molecular basis in eukaryotic cells and analyzes methods for the assessment of the NER-mediated DNA repair efficiency both in vitro and ex vivo.
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Affiliation(s)
- Aleksei A Popov
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia
| | - Irina O Petruseva
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia
| | - Natalya V Naumenko
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia
| | - Olga I Lavrik
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia.
- Novosibirsk National Research State University, Novosibirsk, 630090, Russia
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Lindsey-Boltz LA, Yang Y, Kose C, Deger N, Eynullazada K, Kawara H, Sancar A. Nucleotide excision repair in Human cell lines lacking both XPC and CSB proteins. Nucleic Acids Res 2023; 51:6238-6245. [PMID: 37144462 PMCID: PMC10325923 DOI: 10.1093/nar/gkad334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/12/2023] [Accepted: 04/20/2023] [Indexed: 05/06/2023] Open
Abstract
Nucleotide excision repair removes UV-induced DNA damage through two distinct sub-pathways, global repair and transcription-coupled repair (TCR). Numerous studies have shown that in human and other mammalian cell lines that the XPC protein is required for repair of DNA damage from nontranscribed DNA via global repair and the CSB protein is required for repair of lesions from transcribed DNA via TCR. Therefore, it is generally assumed that abrogating both sub-pathways with an XPC-/-/CSB-/- double mutant would eliminate all nucleotide excision repair. Here we describe the construction of three different XPC-/-/CSB-/- human cell lines that, contrary to expectations, perform TCR. The XPC and CSB genes were mutated in cell lines derived from Xeroderma Pigmentosum patients as well as from normal human fibroblasts and repair was analyzed at the whole genome level using the very sensitive XR-seq method. As predicted, XPC-/- cells exhibited only TCR and CSB-/- cells exhibited only global repair. However, the XPC-/-/CSB-/- double mutant cell lines, although having greatly reduced repair, exhibited TCR. Mutating the CSA gene to generate a triple mutant XPC-/-/CSB-/-/CSA-/- cell line eliminated all residual TCR activity. Together, these findings provide new insights into the mechanistic features of mammalian nucleotide excision repair.
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Affiliation(s)
- Laura A Lindsey-Boltz
- Department of Biochemistry and Biophysics, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Yanyan Yang
- Department of Biochemistry and Biophysics, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Cansu Kose
- Department of Biochemistry and Biophysics, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Nazli Deger
- Department of Biochemistry and Biophysics, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Khagani Eynullazada
- Department of Biochemistry and Biophysics, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Hiroaki Kawara
- Department of Biochemistry and Biophysics, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Aziz Sancar
- Department of Biochemistry and Biophysics, University of North Carolina School of Medicine, Chapel Hill, NC, USA
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