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Islam A, Chakraborty A, Sarker AH, Aryal UK, Pan L, Sharma G, Boldogh I, Hazra T. Site-specific acetylation of polynucleotide kinase 3'-phosphatase regulates its distinct role in DNA repair pathways. Nucleic Acids Res 2024; 52:2416-2433. [PMID: 38224455 PMCID: PMC10954452 DOI: 10.1093/nar/gkae002] [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: 09/05/2023] [Revised: 12/21/2023] [Accepted: 01/01/2024] [Indexed: 01/16/2024] Open
Abstract
Mammalian polynucleotide kinase 3'-phosphatase (PNKP), a DNA end-processing enzyme with 3'-phosphatase and 5'-kinase activities, is involved in multiple DNA repair pathways, including base excision (BER), single-strand break (SSBR), and double-strand break repair (DSBR). However, little is known as to how PNKP functions in such diverse repair processes. Here we report that PNKP is acetylated at K142 (AcK142) by p300 constitutively but at K226 (AcK226) by CBP, only after DSB induction. Co-immunoprecipitation analysis using AcK142 or AcK226 PNKP-specific antibodies showed that AcK142-PNKP associates only with BER/SSBR, and AcK226 PNKP with DSBR proteins. Despite the modest effect of acetylation on PNKP's enzymatic activity in vitro, cells expressing non-acetylable PNKP (K142R or K226R) accumulated DNA damage in transcribed genes. Intriguingly, in striatal neuronal cells of a Huntington's Disease (HD)-based mouse model, K142, but not K226, was acetylated. This is consistent with the reported degradation of CBP, but not p300, in HD cells. Moreover, transcribed genomes of HD cells progressively accumulated DSBs. Chromatin-immunoprecipitation analysis demonstrated the association of Ac-PNKP with the transcribed genes, consistent with PNKP's role in transcription-coupled repair. Thus, our findings demonstrate that acetylation at two lysine residues, located in different domains of PNKP, regulates its distinct role in BER/SSBR versus DSBR.
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Affiliation(s)
- Azharul Islam
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Anirban Chakraborty
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Altaf H Sarker
- Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Uma K Aryal
- Purdue Proteomics Facility, Bindley Bioscience Center, Purdue University, IN 47907, USA
| | - Lang Pan
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Gulshan Sharma
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Istvan Boldogh
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Tapas Hazra
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX 77555, USA
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2
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Thuresson A, Brazina J, Akram T, Albrecht J, Dahl N, Soussi Zander C, Caldecott KW. Novel PNKP mutations associated with reduced DNA single-strand break repair and severe microcephaly, seizures, and developmental delay. Mol Genet Genomic Med 2024; 12:e2295. [PMID: 37916443 PMCID: PMC10767416 DOI: 10.1002/mgg3.2295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 08/18/2023] [Accepted: 09/19/2023] [Indexed: 11/03/2023] Open
Abstract
BACKGROUND Microcephaly with early-onset seizures (MCSZ) is a neurodevelopmental disorder caused by pathogenic variants in the DNA strand break repair protein, polynucleotide kinase 3'-phosphatase (PNKP). METHODS We have used whole genome sequencing and Sanger sequencing to identify disease-causing variants, followed by a minigene assay, Western blotting, alkaline comet assay, γH2AX, and ADP-ribose immunofluorescence. RESULTS Here, we describe a patient with compound heterozygous variants in PNKP, including a missense variant in the DNA phosphatase domain (T323M) and a novel splice acceptor site variant within the DNA kinase domain that we show leads to exon skipping. We show that primary fibroblasts derived from the patient exhibit greatly reduced levels of PNKP protein and reduced rates of DNA single-strand break repair, confirming that the mutated PNKP alleles are dysfunctional. CONCLUSION The data presented show that the detected compound heterozygous variants result in reduced levels of PNKP protein, which affect the repair of both oxidative and TOP1-induced single-strand breaks, and most likely causes MCSZ in this patient.
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Affiliation(s)
- Ann‐Charlotte Thuresson
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory UppsalaUppsala UniversityUppsalaSweden
| | - Jan Brazina
- Genome Damage and Stability CentreUniversity of SussexBrightonUK
| | - Talia Akram
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory UppsalaUppsala UniversityUppsalaSweden
- Present address:
Departments of Pediatrics, Neurology and PhysiologyNorthwestern University Feinberg School of Medicine, Ann & Robert H. Lurie Children's Hospital of ChicagoChicagoIllinoisUSA
| | | | - Niklas Dahl
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory UppsalaUppsala UniversityUppsalaSweden
| | - Cecilia Soussi Zander
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory UppsalaUppsala UniversityUppsalaSweden
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3
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Islam A, Chakraborty A, Sarker AH, Aryal UK, Sharma G, Boldogh I, Hazra T. Site-specific acetylation of polynucleotide kinase 3'-phosphatase (PNKP) regulates its distinct role in DNA repair pathways. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.06.21.545973. [PMID: 37645927 PMCID: PMC10461918 DOI: 10.1101/2023.06.21.545973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Mammalian polynucleotide kinase 3'-phosphatase (PNKP) is a dual-function DNA end-processing enzyme with 3'-phosphatase and 5'-kinase activities, which generate 3'-OH and 5'-phosphate termini respectively, as substrates for DNA polymerase and DNA ligase to complete DNA repair. PNKP is thus involved in multiple DNA repair pathways, including base excision (BER), single-strand break (SSBR), and double-strand break repair (DSBR). However, little is known as to how PNKP functions in such diverse repair processes, which involve distinct sets of proteins. In this study, we report that PNKP is acetylated at two lysine (K142 and K226) residues. While K142 (AcK142) is constitutively acetylated by p300, CBP acetylates K226 (AcK226) only after DSB induction. Co-immunoprecipitation analysis using antibodies specific for PNKP peptides containing AcK142 or AcK226 of PNKP showed that AcK142-PNKP associates only with BER/SSBR, and AcK226 PNKP only with DSBR proteins. Although acetylation at these residues did not significantly affect the enzymatic activity of PNKP in vitro, cells expressing nonacetylable PNKP (K142R or K226R) accumulated DNA damage, specifically in transcribed genes. Intriguingly, in striatal neuronal cells of a Huntington's Disease (HD)-based mouse model, K142, but not K226, was acetylated. This observation is consistent with the reported degradation of CBP but not p300 in HD cells. Moreover, genomes of HD cells progressively accumulated DSBs specifically in the transcribed genes. Chromatin-immunoprecipitation analysis using anti-AcK142 or anti-AcK226 antibodies demonstrated an association of Ac-PNKP with the transcribed genes, consistent with PNKP's role in transcription-coupled repair. Thus, our findings collectively demonstrate that acetylation at two lysine residues located in different domains of PNKP regulates its functionally distinct role in BER/SSBR vs. DSBR.
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Affiliation(s)
- Azharul Islam
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, 77555, USA
| | - Anirban Chakraborty
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, 77555, USA
| | - Altaf H Sarker
- Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Uma K Aryal
- Purdue Proteomics Facility, Bindley Bioscience Center, Purdue University, IN 47907, USA
| | - Gulshan Sharma
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, 77555, USA
| | - Istvan Boldogh
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Tapas Hazra
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, 77555, USA
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Shimizu N, Hamada Y, Morozumi R, Yamamoto J, Iwai S, Sugiyama KI, Ide H, Tsuda M. Repair of topoisomerase 1-induced DNA damage by tyrosyl-DNA phosphodiesterase 2 (TDP2) is dependent on its magnesium binding. J Biol Chem 2023; 299:104988. [PMID: 37392847 PMCID: PMC10407441 DOI: 10.1016/j.jbc.2023.104988] [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: 01/15/2023] [Revised: 06/12/2023] [Accepted: 06/13/2023] [Indexed: 07/03/2023] Open
Abstract
Topoisomerases are enzymes that relax DNA supercoiling during replication and transcription. Camptothecin, a topoisomerase 1 (TOP1) inhibitor, and its analogs trap TOP1 at the 3'-end of DNA as a DNA-bound intermediate, resulting in DNA damage that can kill cells. Drugs with this mechanism of action are widely used to treat cancers. It has previously been shown that tyrosyl-DNA phosphodiesterase 1 (TDP1) repairs TOP1-induced DNA damage generated by camptothecin. In addition, tyrosyl-DNA phosphodiesterase 2 (TDP2) plays critical roles in repairing topoisomerase 2 (TOP2)-induced DNA damage at the 5'-end of DNA and in promoting the repair of TOP1-induced DNA damage in the absence of TDP1. However, the catalytic mechanism by which TDP2 processes TOP1-induced DNA damage has not been elucidated. In this study, we found that a similar catalytic mechanism underlies the repair of TOP1- and TOP2-induced DNA damage by TDP2, with Mg2+-TDP2 binding playing a role in both repair mechanisms. We show chain-terminating nucleoside analogs are incorporated into DNA at the 3'-end and abort DNA replication to kill cells. Furthermore, we found that Mg2+-TDP2 binding also contributes to the repair of incorporated chain-terminating nucleoside analogs. Overall, these findings reveal the role played by Mg2+-TDP2 binding in the repair of both 3'- and 5'-blocking DNA damage.
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Affiliation(s)
- Naoto Shimizu
- Program of Mathematical and Life Sciences, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan
| | - Yusaku Hamada
- Program of Biomedical Science, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan
| | - Ryosuke Morozumi
- Program of Biomedical Science, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan
| | - Junpei Yamamoto
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, Japan
| | - Shigenori Iwai
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, Japan
| | - Kei-Ichi Sugiyama
- Division of Genetics and Mutagenesis, National Institute of Health Sciences, Kawasaki, Kanagawa, Japan
| | - Hiroshi Ide
- Program of Mathematical and Life Sciences, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan.
| | - Masataka Tsuda
- Program of Mathematical and Life Sciences, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan; Program of Biomedical Science, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan; Division of Genetics and Mutagenesis, National Institute of Health Sciences, Kawasaki, Kanagawa, Japan.
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5
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Meyers TJ, Yin J, Herrera VA, Pressman AR, Hoffmann TJ, Schaefer C, Avins AL, Choquet H. Transcriptome-wide association study identifies novel candidate susceptibility genes for migraine. HGG ADVANCES 2023; 4:100211. [PMID: 37415806 PMCID: PMC10319829 DOI: 10.1016/j.xhgg.2023.100211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 06/05/2023] [Indexed: 07/08/2023] Open
Abstract
Genome-wide association studies (GWASs) have identified more than 130 genetic susceptibility loci for migraine; however, how most of these loci impact migraine development is unknown. To identify novel genes associated with migraine and interpret the transcriptional products of those genes, we conducted a transcriptome-wide association study (TWAS). We performed tissue-specific and multi-tissue TWAS analyses to assess associations between imputed gene expression from 53 tissues and migraine susceptibility using FUSION software. Meta-analyzed GWAS summary statistics from 26,052 migraine cases and 487,214 controls, all of European ancestry and from two cohorts (the Kaiser Permanente GERA and the UK Biobank), were used. We evaluated the associations for genes after conditioning on variant-level effects from GWAS, and we tested for colocalization of GWAS migraine-associated loci and expression quantitative trait loci (eQTLs). Across tissue-specific and multi-tissue analyses, we identified 53 genes for which genetically predicted gene expression was associated with migraine after correcting for multiple testing. Of these 53 genes, 10 (ATF5, CNTNAP1, KTN1-AS1, NEIL1, NEK4, NNT, PNKP, RUFY2, TUBG2, and VAT1) did not overlap known migraine-associated loci identified from GWAS. Tissue-specific analysis identified 45 gene-tissue pairs and cardiovascular tissues represented the highest proportion of the Bonferroni-significant gene-tissue pairs (n = 22 [49%]), followed by brain tissues (n = 6 [13%]), and gastrointestinal tissues (n = 4 [9%]). Colocalization analyses provided evidence of shared genetic variants underlying eQTL and GWAS signals in 18 of the gene-tissue pairs (40%). Our TWAS reports novel genes for migraine and highlights the important contribution of brain, cardiovascular, and gastrointestinal tissues in migraine susceptibility.
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Affiliation(s)
- Travis J. Meyers
- Division of Research, Kaiser Permanente Northern California, Oakland, CA 94612, USA
| | - Jie Yin
- Division of Research, Kaiser Permanente Northern California, Oakland, CA 94612, USA
| | - Victor A. Herrera
- Division of Research, Kaiser Permanente Northern California, Oakland, CA 94612, USA
| | - Alice R. Pressman
- Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA 94158, USA
- Sutter Health, San Francisco, CA 94107, USA
| | - Thomas J. Hoffmann
- Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA 94158, USA
- Institute for Human Genetics, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Catherine Schaefer
- Division of Research, Kaiser Permanente Northern California, Oakland, CA 94612, USA
| | - Andrew L. Avins
- Division of Research, Kaiser Permanente Northern California, Oakland, CA 94612, USA
- Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Hélène Choquet
- Division of Research, Kaiser Permanente Northern California, Oakland, CA 94612, USA
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6
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Islam A, Chakraborty A, Gambardella S, Campopiano R, Sarker AH, Boldogh I, Hazra T. Functional analysis of a conserved site mutation in the DNA end processing enzyme PNKP leading to ataxia with oculomotor apraxia type 4 in humans. J Biol Chem 2023; 299:104714. [PMID: 37061005 PMCID: PMC10197107 DOI: 10.1016/j.jbc.2023.104714] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 04/06/2023] [Accepted: 04/07/2023] [Indexed: 04/17/2023] Open
Abstract
Polynucleotide kinase 3'-phosphatase (PNKP), an essential DNA end-processing enzyme in mammals with 3'-phosphatase and 5'-kinase activities, plays a pivotal role in multiple DNA repair pathways. Its functional deficiency has been etiologically linked to various neurological disorders. Recent reports have shown that mutation at a conserved glutamine (Gln) in PNKP leads to late-onset ataxia with oculomotor apraxia type 4 (AOA4) in humans and embryonic lethality in pigs. However, the molecular mechanism underlying such phenotypes remains elusive. Here, we report that the enzymatic activities of the mutant versus WT PNKP are comparable; however, cells expressing mutant PNKP and peripheral blood mononuclear cells (PBMCs) of AOA4 patients showed a significant amount of DNA double-strand break accumulation and consequent activation of the DNA damage response. Further investigation revealed that the nuclear localization of mutant PNKP is severely abrogated, and the mutant proteins remain primarily in the cytoplasm. Western blot analysis of AOA4 patient-derived PBMCs also revealed the presence of mutated PNKP predominantly in the cytoplasm. To understand the molecular determinants, we identified that mutation at a conserved Gln residue impedes the interaction of PNKP with importin alpha but not with importin beta, two highly conserved proteins that mediate the import of proteins from the cytoplasm into the nucleus. Collectively, our data suggest that the absence of PNKP in the nucleus leads to constant activation of the DNA damage response due to persistent accumulation of double-strand breaks in the mutant cells, triggering death of vulnerable brain cells-a potential cause of neurodegeneration in AOA4 patients.
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Affiliation(s)
- Azharul Islam
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, USA
| | - Anirban Chakraborty
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, USA
| | - Stefano Gambardella
- IRCCS Neuromed & Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino, Italy
| | - Rosa Campopiano
- IRCCS Neuromed & Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino, Italy
| | - Altaf H Sarker
- Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Istvan Boldogh
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
| | - Tapas Hazra
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, USA.
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7
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Jia D, Fan W, Ren W, Liu C. One-step detection of T4 polynucleotide kinase activity based on single particle-confined enzyme reaction and digital particle counting. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.07.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Yang J, He G, Wu W, Deng W, Tan Y, Xie Q. Sensitive photoelectrochemical determination of T4 polynucleotide kinase using AuNPs/SnS 2/ZnIn 2S 4 photoactive material and enzymatic reaction-induced DNA structure switch strategy. Talanta 2022; 249:123660. [PMID: 35689947 DOI: 10.1016/j.talanta.2022.123660] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 06/02/2022] [Accepted: 06/04/2022] [Indexed: 12/30/2022]
Abstract
We report here Au nanoparticles (AuNPs)/SnS2/ZnIn2S4 as a high-performance active material for sensitive photoelectrochemical (PEC) determination of T4 polynucleotide kinase (T4 PNK) using an enzymatic reaction-induced DNA structure switch strategy. To construct the PEC biosensor, a double-stranded DNA probe consisting of a CdS quantum dots (QDs)-labeled single-stranded DNA (sDNA) and its complementary DNA (cDNA) is immobilized on the AuNPs/SnS2/ZnIn2S4 photoactive material. T4 PNK can catalyze the phosphorylation of 5'-OH-terminated sDNA in the double-stranded DNA probe when ATP is present, and λ-exonuclease can catalyze the degradation of the phosphorylated sDNA into small fragments. Then the cDNA forms a hairpin structure so that CdS QDs and AuNPs are in close contact, which can induce exciton-plasma interactions between CdS QDs and AuNPs. The exciton-plasma interactions significantly boost the photocurrent, enabling the "signal on" PEC determination of T4 PNK in the range of 10-4 - 1 U mL-1 with a detection limit of 6 × 10-5 U mL-1. The PEC biosensor can also be used to screen enzyme inhibitors.
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Affiliation(s)
- Jinhua Yang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, China
| | - Guihua He
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, China
| | - Wenying Wu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, China
| | - Wenfang Deng
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, China.
| | - Yueming Tan
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, China.
| | - Qingji Xie
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, China
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9
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Zika Virus Induces Mitotic Catastrophe in Human Neural Progenitors by Triggering Unscheduled Mitotic Entry in the Presence of DNA Damage While Functionally Depleting Nuclear PNKP. J Virol 2022; 96:e0033322. [PMID: 35412344 PMCID: PMC9093132 DOI: 10.1128/jvi.00333-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Vertical transmission of Zika virus (ZIKV) leads with high frequency to congenital ZIKV syndrome (CZS), whose worst outcome is microcephaly. However, the mechanisms of congenital ZIKV neurodevelopmental pathologies, including direct cytotoxicity to neural progenitor cells (NPC), placental insufficiency, and immune responses, remain incompletely understood. At the cellular level, microcephaly typically results from death or insufficient proliferation of NPC or cortical neurons. NPC replicate fast, requiring efficient DNA damage responses to ensure genome stability. Like congenital ZIKV infection, mutations in the polynucleotide 5′-kinase 3′-phosphatase (PNKP) gene, which encodes a critical DNA damage repair enzyme, result in recessive syndromes often characterized by congenital microcephaly with seizures (MCSZ). We thus tested whether there were any links between ZIKV and PNKP. Here, we show that two PNKP phosphatase inhibitors or PNKP knockout inhibited ZIKV replication. PNKP relocalized from the nucleus to the cytoplasm in infected cells, colocalizing with the marker of ZIKV replication factories (RF) NS1 and resulting in functional nuclear PNKP depletion. Although infected NPC accumulated DNA damage, they failed to activate the DNA damage checkpoint kinases Chk1 and Chk2. ZIKV also induced activation of cytoplasmic CycA/CDK1 complexes, which trigger unscheduled mitotic entry. Inhibition of CDK1 activity inhibited ZIKV replication and the formation of RF, supporting a role of cytoplasmic CycA/CDK1 in RF morphogenesis. In brief, ZIKV infection induces mitotic catastrophe resulting from unscheduled mitotic entry in the presence of DNA damage. PNKP and CycA/CDK1 are thus host factors participating in ZIKV replication in NPC, and pathogenesis to neural progenitor cells. IMPORTANCE The 2015–2017 Zika virus (ZIKV) outbreak in Brazil and subsequent international epidemic revealed the strong association between ZIKV infection and congenital malformations, mostly neurodevelopmental defects up to microcephaly. The scale and global expansion of the epidemic, the new ZIKV outbreaks (Kerala state, India, 2021), and the potential burden of future ones pose a serious ongoing risk. However, the cellular and molecular mechanisms resulting in microcephaly remain incompletely understood. Here, we show that ZIKV infection of neuronal progenitor cells results in cytoplasmic sequestration of an essential DNA repair protein itself associated with microcephaly, with the consequent accumulation of DNA damage, together with an unscheduled activation of cytoplasmic CDK1/Cyclin A complexes in the presence of DNA damage. These alterations result in mitotic catastrophe of neuronal progenitors, which would lead to a depletion of cortical neurons during development.
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10
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Jiang B, Murray C, Cole BL, Glover JNM, Chan GK, Deschenes J, Mani RS, Subedi S, Nerva JD, Wang AC, Lockwood CM, Mefford HC, Leary SES, Ojemann JG, Weinfeld M, Ene CI. Mutations of the DNA repair gene PNKP in a patient with microcephaly, seizures, and developmental delay (MCSZ) presenting with a high-grade brain tumor. Sci Rep 2022; 12:5386. [PMID: 35354845 PMCID: PMC8967877 DOI: 10.1038/s41598-022-09097-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Accepted: 03/04/2022] [Indexed: 11/08/2022] Open
Abstract
Polynucleotide Kinase-Phosphatase (PNKP) is a bifunctional enzyme that possesses both DNA 3'-phosphatase and DNA 5'-kinase activities, which are required for processing termini of single- and double-strand breaks generated by reactive oxygen species (ROS), ionizing radiation and topoisomerase I poisons. Even though PNKP is central to DNA repair, there have been no reports linking PNKP mutations in a Microcephaly, Seizures, and Developmental Delay (MSCZ) patient to cancer. Here, we characterized the biochemical significance of 2 germ-line point mutations in the PNKP gene of a 3-year old male with MSCZ who presented with a high-grade brain tumor (glioblastoma multiforme) within the cerebellum. Functional and biochemical studies demonstrated these PNKP mutations significantly diminished DNA kinase/phosphatase activities, altered its cellular distribution, caused defective repair of DNA single/double stranded breaks, and were associated with a higher propensity for oncogenic transformation. Our findings indicate that specific PNKP mutations may contribute to tumor initiation within susceptible cells in the CNS by limiting DNA damage repair and increasing rates of spontaneous mutations resulting in pediatric glioma associated driver mutations such as ATRX and TP53.
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Affiliation(s)
- Bingcheng Jiang
- Department of Oncology, University of Alberta, Cross Cancer Institute, 11560 University Ave., Edmonton, AB, T6G 1Z2, Canada
| | - Cameron Murray
- Department of Biochemistry, University of Alberta, Medical Sciences Building, Edmonton, AB, T6G 2H7, Canada
| | - Bonnie L Cole
- Department of Pathology, University of Washington, Seattle, WA, USA
| | - J N Mark Glover
- Department of Biochemistry, University of Alberta, Medical Sciences Building, Edmonton, AB, T6G 2H7, Canada
| | - Gordon K Chan
- Department of Oncology, University of Alberta, Cross Cancer Institute, 11560 University Ave., Edmonton, AB, T6G 1Z2, Canada
| | - Jean Deschenes
- Department of Laboratory Medicine and Pathology, University of Alberta, Cross Cancer Institute, 11560 University Ave., Edmonton, AB, T6G 1Z2, Canada
| | - Rajam S Mani
- Department of Oncology, University of Alberta, Cross Cancer Institute, 11560 University Ave., Edmonton, AB, T6G 1Z2, Canada
| | - Sudip Subedi
- Department of Oncology, University of Alberta, Cross Cancer Institute, 11560 University Ave., Edmonton, AB, T6G 1Z2, Canada
| | - John D Nerva
- Department of Neurological Surgery, Tulane University, New Orleans, LA, USA
| | - Anthony C Wang
- Department of Neurological Surgery, University of California Los Angeles, Los Angeles, CA, USA
| | | | - Heather C Mefford
- Division of Genetics Medicine, University of Washington, Seattle, WA, USA
| | - Sarah E S Leary
- Division of Pediatric Hematology/Oncology, Seattle Children's Hospital, Seattle, WA, USA
| | - Jeffery G Ojemann
- Department of Neurological Surgery, University of Washington, Seattle, WA, USA
| | - Michael Weinfeld
- Department of Oncology, University of Alberta, Cross Cancer Institute, 11560 University Ave., Edmonton, AB, T6G 1Z2, Canada.
| | - Chibawanye I Ene
- Department of Neurological Surgery, MD Anderson Cancer Center, Houston, TX, USA.
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11
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Molecular Characterization of Portuguese Patients with Hereditary Cerebellar Ataxia. Cells 2022; 11:cells11060981. [PMID: 35326432 PMCID: PMC8946949 DOI: 10.3390/cells11060981] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 03/10/2022] [Accepted: 03/11/2022] [Indexed: 01/02/2023] Open
Abstract
Hereditary cerebellar ataxia (HCA) comprises a clinical and genetic heterogeneous group of neurodegenerative disorders characterized by incoordination of movement, speech, and unsteady gait. In this study, we performed whole-exome sequencing (WES) in 19 families with HCA and presumed autosomal recessive (AR) inheritance, to identify the causal genes. A phenotypic classification was performed, considering the main clinical syndromes: spastic ataxia, ataxia and neuropathy, ataxia and oculomotor apraxia (AOA), ataxia and dystonia, and ataxia with cognitive impairment. The most frequent causal genes were associated with spastic ataxia (SACS and KIF1C) and with ataxia and neuropathy or AOA (PNKP). We also identified three families with autosomal dominant (AD) forms arising from de novo variants in KIF1A, CACNA1A, or ATP1A3, reinforcing the importance of differential diagnosis (AR vs. AD forms) in families with only one affected member. Moreover, 10 novel causal-variants were identified, and the detrimental effect of two splice-site variants confirmed through functional assays. Finally, by reviewing the molecular mechanisms, we speculated that regulation of cytoskeleton function might be impaired in spastic ataxia, whereas DNA repair is clearly associated with AOA. In conclusion, our study provided a genetic diagnosis for HCA families and proposed common molecular pathways underlying cerebellar neurodegeneration.
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12
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Caldecott KW, Ward ME, Nussenzweig A. The threat of programmed DNA damage to neuronal genome integrity and plasticity. Nat Genet 2022; 54:115-120. [PMID: 35145299 DOI: 10.1038/s41588-021-01001-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 12/09/2021] [Indexed: 02/08/2023]
Abstract
The neuronal genome is particularly sensitive to loss or attenuation of DNA repair, and many neurological diseases ensue when DNA repair is impaired. It is well-established that the neuronal genome is subjected to stochastic DNA damage, most likely because of extensive oxidative stress in the brain. However, recent studies have identified unexpected high levels of 'programmed' DNA breakage in neurons, which we propose arise during physiological DNA metabolic processes intrinsic to neuronal development, differentiation and maintenance. The role of programmed DNA breaks in normal neuronal physiology and disease remains relatively unexplored thus far. However, bulk and single-cell sequencing analyses of neurodegenerative diseases have revealed age-related somatic mutational signatures that are enriched in regulatory regions of the genome. Here, we explore a paradigm of DNA repair in neurons, in which the genome is safeguarded from erroneous impacts of programmed genome breakage intrinsic to normal neuronal function.
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Affiliation(s)
- Keith W Caldecott
- Genome Damage and Stability Centre, School of Life Sciences, University of Sussex, Brighton, UK.
| | - Michael E Ward
- National Institute of Neurological Disorders and Stroke, NIH, Bethesda, MD, USA.
| | - André Nussenzweig
- Laboratory of Genome Integrity, National Cancer Institute, NIH, Bethesda, MD, USA.
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13
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Zhang L, Fan W, Jia D, Feng Q, Ren W, Liu C. Microchamber-Free Digital Flow Cytometric Analysis of T4 Polynucleotide Kinase Phosphatase Based on Single-Enzyme-to-Single-Bead Space-Confined Reaction. Anal Chem 2021; 93:14828-14836. [PMID: 34713697 DOI: 10.1021/acs.analchem.1c03724] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Digital bioassays have attracted extensive attention in biomedical applications due to their ultrahigh sensitivity. However, traditional digital bioassays require numerous microchambers such as droplets or microwells, which restricts their application scope. Herein, we propose a microchamber-free flow cytometric method for the digital quantification of T4 polynucleotide kinase phosphatase (T4 PNKP) based on an unprecedented phenomenon that each T4 PNKP molecule-catalyzed reaction can be spatially self-confined on a single microbead, which ultimately enables the one-target-to-one-fluorescence-positive microbead digital signal transduction. The digital signal-readout mode can clearly detect T4 PNKP concentrations as low as 1.28 × 10-10 U/μL, making it most sensitive method to date. Significantly, T4 PNKP can be specifically distinguished from other phosphatases and nucleases in complex samples by digitally counting the fluorescence-positive microbeads, which cannot be realized by traditional bulk measurement-based methods. Taking advantage of the novel space-confined enzymatic feature of T4 PNKP, this digital mechanism can use T4 PNKP as the enzyme label to fabricate digital sensing systems toward various biomolecules such as digital enzyme-linked immunosorbent assay (ELISA). Therefore, this work not only enlarges the toolbox for high-sensitivity biomolecule detection but also opens new gates to fabricate next-generation digital assays.
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Affiliation(s)
- Lijun Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province; School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710119, Shaanxi Province, P. R. China
| | - Wenjiao Fan
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province; School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710119, Shaanxi Province, P. R. China
| | - Dailu Jia
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province; School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710119, Shaanxi Province, P. R. China
| | - Qinya Feng
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province; School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710119, Shaanxi Province, P. R. China
| | - Wei Ren
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province; School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710119, Shaanxi Province, P. R. China
| | - Chenghui Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province; School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710119, Shaanxi Province, P. R. China
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14
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Chakraborty A, Tapryal N, Islam A, Mitra S, Hazra T. Transcription coupled base excision repair in mammalian cells: So little is known and so much to uncover. DNA Repair (Amst) 2021; 107:103204. [PMID: 34390916 DOI: 10.1016/j.dnarep.2021.103204] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 07/06/2021] [Accepted: 08/03/2021] [Indexed: 12/31/2022]
Abstract
Oxidized bases in the genome has been implicated in various human pathologies, including cancer, aging and neurological diseases. Their repair is initiated with excision by DNA glycosylases (DGs) in the base excision repair (BER) pathway. Among the five oxidized base-specific human DGs, OGG1 and NTH1 preferentially excise oxidized purines and pyrimidines, respectively, while NEILs remove both oxidized purines and pyrimidines. However, little is known about why cells possess multiple DGs with overlapping substrate specificities. Studies of the past decades revealed that some DGs are involved in repair of oxidized DNA base lesions in the actively transcribed regions. Preferential removal of lesions from the transcribed strands of active genes, called transcription-coupled repair (TCR), was discovered as a distinct sub-pathway of nucleotide excision repair; however, such repair of oxidized DNA bases had not been established until our recent demonstration of NEIL2's role in TC-BER of the nuclear genome. We have shown that NEIL2 forms a distinct transcriptionally active, repair proficient complex. More importantly, we for the first time reconstituted TC-BER using purified components. These studies are important for characterizing critical requirement for the process. However, because NEIL2 cannot remove all types of oxidized bases, it is unlikely to be the only DNA glycosylase involved in TC-BER. Hence, we postulate TC-BER process to be universally involved in maintaining the functional integrity of active genes, especially in post-mitotic, non-growing cells. We further postulate that abnormal bases (e.g., uracil), and alkylated and other small DNA base adducts are also repaired via TC-BER. In this review, we have provided an overview of the various aspects of TC-BER in mammalian cells with the hope of generating significant interest of many researchers in the field. Further studies aimed at better understanding the mechanistic aspects of TC-BER could help elucidate the linkage of TC-BER deficiency to various human pathologies.
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Affiliation(s)
- Anirban Chakraborty
- Department of Internal Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, Sealy Center for Molecular Medicine, University of Texas Medical Branch, Galveston, TX 77555, USA.
| | - Nisha Tapryal
- Department of Internal Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, Sealy Center for Molecular Medicine, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Azharul Islam
- Department of Internal Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, Sealy Center for Molecular Medicine, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Sankar Mitra
- Department of Radiation Oncology, The Houston Methodist Research Institute, Houston, TX 77030, USA
| | - Tapas Hazra
- Department of Internal Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, Sealy Center for Molecular Medicine, University of Texas Medical Branch, Galveston, TX 77555, USA.
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15
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Shin W, Alpaugh W, Hallihan LJ, Sinha S, Crowther E, Martin GR, Scheidl-Yee T, Yang X, Yoon G, Goldsmith T, Berger ND, de Almeida LG, Dufour A, Dobrinski I, Weinfeld M, Jirik FR, Biernaskie J. PNKP is required for maintaining the integrity of progenitor cell populations in adult mice. Life Sci Alliance 2021; 4:4/9/e202000790. [PMID: 34226276 PMCID: PMC8321660 DOI: 10.26508/lsa.202000790] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 06/22/2021] [Accepted: 06/23/2021] [Indexed: 11/24/2022] Open
Abstract
Knockout of Pnkp in adult mice impairs the growth of hair follicle, spermatogonial, and neural progenitor populations. DNA repair proteins are critical to the maintenance of genomic integrity. Specific types of genotoxic factors, including reactive oxygen species generated during normal cellular metabolism or as a result of exposure to exogenous oxidative agents, frequently leads to “ragged” single-strand DNA breaks. The latter exhibits abnormal free DNA ends containing either a 5′-hydroxyl or 3′-phosphate requiring correction by the dual function enzyme, polynucleotide kinase phosphatase (PNKP), before DNA polymerase and ligation reactions can occur to seal the break. Pnkp gene deletion during early murine development leads to lethality; in contrast, the role of PNKP in adult mice is unknown. To investigate the latter, we used an inducible conditional mutagenesis approach to cause global disruption of the Pnkp gene in adult mice. This resulted in a premature aging-like phenotype, characterized by impaired growth of hair follicles, seminiferous tubules, and neural progenitor cell populations. These results point to an important role for PNKP in maintaining the normal growth and survival of these murine progenitor populations.
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Affiliation(s)
- Wisoo Shin
- Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, Canada
| | - Whitney Alpaugh
- Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, Canada
| | - Laura J Hallihan
- McCaig Institute for Bone and Joint Health, Calgary, Canada.,Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Canada
| | - Sarthak Sinha
- Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, Canada
| | - Emilie Crowther
- Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, Canada
| | - Gary R Martin
- McCaig Institute for Bone and Joint Health, Calgary, Canada.,Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Canada
| | | | - Xiaoyan Yang
- Department of Oncology, University of Alberta, and Cross Cancer Institute, Edmonton, Canada
| | - Grace Yoon
- Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, Canada
| | - Taylor Goldsmith
- Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, Canada
| | - Nelson D Berger
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Canada
| | - Luiz Gn de Almeida
- McCaig Institute for Bone and Joint Health, Calgary, Canada.,Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Canada
| | - Antoine Dufour
- McCaig Institute for Bone and Joint Health, Calgary, Canada.,Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Canada.,Department of Physiology and Pharmacology, University of Calgary, Calgary, Canada
| | - Ina Dobrinski
- Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, Canada
| | - Michael Weinfeld
- Department of Oncology, University of Alberta, and Cross Cancer Institute, Edmonton, Canada
| | - Frank R Jirik
- McCaig Institute for Bone and Joint Health, Calgary, Canada .,Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Canada.,Alberta Children's Hospital Research Institute, Calgary, Canada
| | - Jeff Biernaskie
- Department of Comparative Biology and Experimental Medicine, University of Calgary, Calgary, Canada .,Department of Physiology and Pharmacology, University of Calgary, Calgary, Canada.,Department of Surgery, University of Calgary, Calgary, Canada.,Hotchkiss Brain Institute, Calgary, Canada
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16
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Bitarafan F, Khodaeian M, Almadani N, Kalhor A, Sardehaei EA, Garshasbi M. Compound Heterozygous Mutations in PNKP Gene in an Iranian Child with Microcephaly, Seizures, and Developmental Delay. Fetal Pediatr Pathol 2021; 40:174-180. [PMID: 31707899 DOI: 10.1080/15513815.2019.1686784] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND Pathogenic variants within polynucleotide kinase 3'phosphatase (PNKP) gene cause microcephaly, seizures, and developmental delay (MCSZ) and ataxia-oculomotor apraxia type 4 (AOA4) disorders due to unrepaired DNA lesions. METHODS Whole exome sequencing was performed on a child with microcephaly, seizures, developmental delay, callosal dysgenesis on MRI, intellectual disability, speech disorder, hyperactivity, and ataxic gait. RESULTS Two heterozygous mutations in the PKNP gene, a novel intronic frameshift variant c.1298 + 33_1299-24del and a previously reported duplication, c.1253_1269dup; p.Thr424Glyfs*49 in exon 14 were identified. Both of these mutations affect the DNA kinase domain of PKNP. CONCLUSIONS Our finding along with previous studies provide more evidence of the clinical heterogeneity of diseases caused by mutations in PNKP which makes its clinical diagnosis difficult and highlights the importance of genetic testing to unravel the cause of these diseases.
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Affiliation(s)
- Fatemeh Bitarafan
- Department of Cellular and Molecular Biology, North Tehran Branch, Islamic Azad University, Tehran, Iran
| | | | - Navid Almadani
- Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran
| | - Alireza Kalhor
- Department of medical science, Qom branch, Islamic Azad University, Qom, Iran
| | | | - Masoud Garshasbi
- Department of Medical Genetics, Faculty of Medical Sciences, Tarbiat Modares University, Teheran, Iran
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17
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Tu Y, Li X, Zhu X, Liu X, Guo C, Jia D, Tang TS. Determining the Fate of Neurons in SCA3: ATX3, a Rising Decision Maker in Response to DNA Stresses and Beyond. Front Cell Dev Biol 2021; 8:619911. [PMID: 33425926 PMCID: PMC7793700 DOI: 10.3389/fcell.2020.619911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 12/01/2020] [Indexed: 12/14/2022] Open
Abstract
DNA damage response (DDR) and apoptosis are reported to be involved in the pathogenesis of many neurodegenerative diseases including polyglutamine (polyQ) disorders, such as Spinocerebellar ataxia type 3 (SCA3) and Huntington's disease (HD). Consistently, an increasing body of studies provide compelling evidence for the crucial roles of ATX3, whose polyQ expansion is defined as the cause of SCA3, in the maintenance of genome integrity and regulation of apoptosis. The polyQ expansion in ATX3 seems to affect its physiological functions in these distinct pathways. These advances have expanded our understanding of the relationship between ATX3's cellular functions and the underlying molecular mechanism of SCA3. Interestingly, dysregulated DDR pathways also contribute to the pathogenesis of other neurodegenerative disorder such as HD, which presents a common molecular mechanism yet distinct in detail among different diseases. In this review, we provide a comprehensive overview of the current studies about the physiological roles of ATX3 in DDR and related apoptosis, highlighting the crosslinks between these impaired pathways and the pathogenesis of SCA3. Moreover, whether these mechanisms are shared in other neurodegenerative diseases are analyzed. Finally, the preclinical studies targeting DDR and related apoptosis for treatment of polyQ disorders including SCA3 and HD are also summarized and discussed.
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Affiliation(s)
- Yingfeng Tu
- Key Laboratory of Birth Defects and Related Diseases of Women and Children, Department of Paediatrics, West China Second University Hospital, State Key Laboratory of Biotherapy and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu, China
| | - Xiaoling Li
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, China
| | - Xuefei Zhu
- Guangdong Key Laboratory for Genome Stability & Disease Prevention, Shenzhen University Health Science Center, Shenzhen, China
| | - Xiaokang Liu
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, China
| | - Caixia Guo
- Beijing Institute of Genomics (China National Center for Bioinformation), University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China
| | - Da Jia
- Key Laboratory of Birth Defects and Related Diseases of Women and Children, Department of Paediatrics, West China Second University Hospital, State Key Laboratory of Biotherapy and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu, China
| | - Tie-Shan Tang
- State Key Laboratory of Membrane Biology, Institute of Zoology, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China.,Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
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18
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Bermúdez-Guzmán L, Jimenez-Huezo G, Arguedas A, Leal A. Mutational survivorship bias: The case of PNKP. PLoS One 2020; 15:e0237682. [PMID: 33332469 PMCID: PMC7746193 DOI: 10.1371/journal.pone.0237682] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 11/23/2020] [Indexed: 01/21/2023] Open
Abstract
The molecular function of a protein relies on its structure. Understanding how variants alter structure and function in multidomain proteins is key to elucidate the generation of a pathological phenotype. However, one may fall into the logical bias of assessing protein damage only based on the variants that are visible (survivorship bias), which can lead to partial conclusions. This is the case of PNKP, an important nuclear and mitochondrial DNA repair enzyme with both kinase and phosphatase function. Most variants in PNKP are confined to the kinase domain, leading to a pathological spectrum of three apparently distinct clinical entities. Since proteins and domains may have a different tolerability to variation, we evaluated whether variants in PNKP are under survivorship bias. Here, we provide the evidence that supports a higher tolerance in the kinase domain even when all variants reported are deleterious. Instead, the phosphatase domain is less tolerant due to its lower variant rates, a higher degree of sequence conservation, lower dN/dS ratios, and the presence of more disease-propensity hotspots. Together, our results support previous experimental evidence that demonstrated that the phosphatase domain is functionally more necessary and relevant for DNA repair, especially in the context of the development of the central nervous system. Finally, we propose the term "Wald’s domain" for future studies analyzing the possible survivorship bias in multidomain proteins.
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Affiliation(s)
- Luis Bermúdez-Guzmán
- Section of Genetics and Biotechnology, School of Biology, University de Costa Rica, San Pedro, San José, Costa Rica
| | - Gabriel Jimenez-Huezo
- Section of Genetics and Biotechnology, School of Biology, University de Costa Rica, San Pedro, San José, Costa Rica
| | - Andrés Arguedas
- School of Statistics, University de Costa Rica, San Pedro, San José, Costa Rica
| | - Alejandro Leal
- Section of Genetics and Biotechnology, School of Biology, University de Costa Rica, San Pedro, San José, Costa Rica
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19
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The FHA domain of PNKP is essential for its recruitment to DNA damage sites and maintenance of genome stability. Mutat Res 2020; 822:111727. [PMID: 33220551 DOI: 10.1016/j.mrfmmm.2020.111727] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 09/28/2020] [Accepted: 10/26/2020] [Indexed: 01/08/2023]
Abstract
Polynucleotide kinase phosphatase (PNKP) has dual enzymatic activities as kinase and phosphatase for DNA ends, which are the prerequisite for the ligation, and thus is involved in base excision repair, single-strand break repair and non-homologous end joining for double-strand break (DSB) repair. In this study, we examined mechanisms for the recruitment of PNKP to DNA damage sites by laser micro-irradiation and live-cell imaging analysis using confocal microscope. We show that the forkhead-associated (FHA) domain of PNKP is essential for the recruitment of PNKP to DNA damage sites. Arg35 and Arg48 within the FHA domain are required for interactions with XRCC1 and XRCC4. PNKP R35A/R48A mutant failed to accumulate on the laser track and siRNA-mediated depletion of XRCC1 and/or XRCC4 reduced PNKP accumulation on the laser track, indicating that PNKP is recruited to DNA damage sites via the interactions between its FHA domain and XRCC1 or XRCC4. Furthermore, cells expressing PNKP R35A/R48A mutant exhibited increased sensitivity toward ionizing radiation in association with delayed SSB and DSB repair and genome instability, represented by micronuclei and chromosome bridges. Taken together, these findings revealed the importance of PNKP recruitment to DNA damage sites via its FHA domain for DNA repair and maintenance of genome stability.
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20
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Lin M, Wan H, Zhang J, Wang Q, Hu X, Xia F. Electrochemical DNA Sensors Based on MoS 2-AuNPs for Polynucleotide Kinase Activity and Inhibition Assay. ACS APPLIED MATERIALS & INTERFACES 2020; 12:45814-45821. [PMID: 32877162 DOI: 10.1021/acsami.0c13385] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The determination of T4 polynucleotide kinase (PNK) activity and the screening of PNK inhibitors are critical to disease diagnosis and drug discovery. Numerous electrochemical strategies have been developed for the sensitive measurement of PNK activity and inhibition. However, they often suffer from additional labels and multiple steps of the detection process for the electrochemical readout. Herein, we have demonstrated an electrochemical DNA (E-DNA) sensor for the one-step detection of PNK with "signal-on" readout with no need for additional labels. In our design, the highly switchable double-stranded DNA (dsDNA) probes are immobilized on the gold nanoparticle-decorated molybdenum disulfide nanomaterial (MoS2-AuNPs), which possesses large surface area and high conductivity for elevating the signal gain in the PNK detection. This signal-on E-DNA sensor integrated with MoS2-AuNPs exhibits a much higher sensitivity than that without MoS2-AuNPs, showing a detection limit of 2.18 × 10-4 U/mL. Furthermore, this assay shows high selectivity, with the ability to discriminate PNK from other enzymes and proteins, and can be utilized to screen inhibitors. The proposed sensor is easy to operate with one-step readout and robust for PNK detection in the biological matrix and shows great potential for point-of-care in clinical diagnostics and drug screening.
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Affiliation(s)
- Meihua Lin
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Hao Wan
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Jian Zhang
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Quan Wang
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Xinyu Hu
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Fan Xia
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
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21
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Zagnoli-Vieira G, Caldecott KW. Untangling trapped topoisomerases with tyrosyl-DNA phosphodiesterases. DNA Repair (Amst) 2020; 94:102900. [PMID: 32653827 DOI: 10.1016/j.dnarep.2020.102900] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 06/14/2020] [Accepted: 06/14/2020] [Indexed: 02/08/2023]
Abstract
DNA topoisomerases alleviate the torsional stress that is generated by processes that are central to genome metabolism such as transcription and DNA replication. To do so, these enzymes generate an enzyme intermediate known as the cleavage complex in which the topoisomerase is covalently linked to the termini of a DNA single- or double-strand break. Whilst cleavage complexes are normally transient they can occasionally become abortive, creating protein-linked DNA breaks that threaten genome stability and cell survival; a process promoted and exploited in the cancer clinic by the use of topoisomerase 'poisons'. Here, we review the consequences to genome stability and human health of abortive topoisomerase-induced DNA breakage and the cellular pathways that cells have adopted to mitigate them, with particular focus on an important class of enzymes known as tyrosyl-DNA phosphodiesterases.
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Affiliation(s)
- Guido Zagnoli-Vieira
- Wellcome Trust Cancer Research UK Gurdon Institute, Tennis Court Road, Cambridge, CB2 1QN, UK.
| | - Keith W Caldecott
- Genome Damage Stability Centre, University of Sussex, Falmer Road, Brighton, BN1 9RQ, UK.
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22
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Kalasova I, Hailstone R, Bublitz J, Bogantes J, Hofmann W, Leal A, Hanzlikova H, Caldecott KW. Pathological mutations in PNKP trigger defects in DNA single-strand break repair but not DNA double-strand break repair. Nucleic Acids Res 2020; 48:6672-6684. [PMID: 32504494 PMCID: PMC7337934 DOI: 10.1093/nar/gkaa489] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 04/30/2020] [Accepted: 06/04/2020] [Indexed: 12/20/2022] Open
Abstract
Hereditary mutations in polynucleotide kinase-phosphatase (PNKP) result in a spectrum of neurological pathologies ranging from neurodevelopmental dysfunction in microcephaly with early onset seizures (MCSZ) to neurodegeneration in ataxia oculomotor apraxia-4 (AOA4) and Charcot-Marie-Tooth disease (CMT2B2). Consistent with this, PNKP is implicated in the repair of both DNA single-strand breaks (SSBs) and DNA double-strand breaks (DSBs); lesions that can trigger neurodegeneration and neurodevelopmental dysfunction, respectively. Surprisingly, however, we did not detect a significant defect in DSB repair (DSBR) in primary fibroblasts from PNKP patients spanning the spectrum of PNKP-mutated pathologies. In contrast, the rate of SSB repair (SSBR) is markedly reduced. Moreover, we show that the restoration of SSBR in patient fibroblasts collectively requires both the DNA kinase and DNA phosphatase activities of PNKP, and the fork-head associated (FHA) domain that interacts with the SSBR protein, XRCC1. Notably, however, the two enzymatic activities of PNKP appear to affect different aspects of disease pathology, with reduced DNA phosphatase activity correlating with neurodevelopmental dysfunction and reduced DNA kinase activity correlating with neurodegeneration. In summary, these data implicate reduced rates of SSBR, not DSBR, as the source of both neurodevelopmental and neurodegenerative pathology in PNKP-mutated disease, and the extent and nature of this reduction as the primary determinant of disease severity.
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Affiliation(s)
- Ilona Kalasova
- Department of Genome Dynamics, Institute of Molecular Genetics of the Czech Academy of Sciences, Prague 4, 142 20, Czech Republic
| | - Richard Hailstone
- Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton BN1 9RQ, UK
| | - Janin Bublitz
- Department of Human Genetics, Hannover Medical School, Hannover, Germany
| | - Jovel Bogantes
- Servicio de Cirugía Reconstructiva, Hospital Rafael Ángel Calderón Guardia, Caja Costarricense de Seguro Social, San José, Costa Rica
| | - Winfried Hofmann
- Department of Human Genetics, Hannover Medical School, Hannover, Germany
| | - Alejandro Leal
- Section of Genetics and Biotechnology, School of Biology, University of Costa Rica, San José, Costa Rica
| | - Hana Hanzlikova
- Department of Genome Dynamics, Institute of Molecular Genetics of the Czech Academy of Sciences, Prague 4, 142 20, Czech Republic.,Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton BN1 9RQ, UK
| | - Keith W Caldecott
- Department of Genome Dynamics, Institute of Molecular Genetics of the Czech Academy of Sciences, Prague 4, 142 20, Czech Republic.,Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton BN1 9RQ, UK
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23
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Yang B, Zhang B, Cao Z, Xu X, Huo Z, Zhang P, Xiang S, Zhao Z, Lv C, Meng M, Zhang G, Dong L, Shi S, Yang L, Zhou Q. The lipogenic LXR-SREBF1 signaling pathway controls cancer cell DNA repair and apoptosis and is a vulnerable point of malignant tumors for cancer therapy. Cell Death Differ 2020; 27:2433-2450. [PMID: 32144382 PMCID: PMC7370224 DOI: 10.1038/s41418-020-0514-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 01/23/2020] [Accepted: 02/03/2020] [Indexed: 01/13/2023] Open
Abstract
Cancer cells are defective in DNA repair, so they experience increased DNA strand breaks, genome instability, gene mutagenesis, and tumorigenicity; however, multiple classic DNA repair genes and pathways are strongly activated in malignant tumor cells to compensate for the DNA repair deficiency and gain an apoptosis resistance. The mechanisms underlying this phenomenon in cancer are unclear. We speculate that a key DNA repair gene or signaling pathway in cancer has not yet been recognized. Here, we show that the lipogenic liver X receptor (LXR)-sterol response element binding factor-1 (SREBF1) axis controls the transcription of a key DNA repair gene polynucleotide kinase/phosphatase (PNKP), thereby governing cancer cell DNA repair and apoptosis. Notably, the PNKP levels were significantly reduced in 95% of human pancreatic cancer (PC) patients, particularly deep reduction for sixfold in all of the advanced-stage PC cases. PNKP is also deficient in three other types of cancer that we examined. In addition, the expression of LXRs and SREBF1 was significantly reduced in the tumor tissues from human PC patients compared with the adjacent normal tissues. The newly identified LXR-SREBF1-PNKP signaling pathway is deficient in PC, and the defect in the pathway contributes to the DNA repair deficiency in the cancer. Strikingly, further diminution of the vulnerable LXR-SREBF1-PNKP signaling pathway using a small molecule triptonide, a new LXR antagonist identified in this investigation, at a concentration of 8 nM robustly activated tumor-suppressor p53 and readily elevated cancer cell DNA strand breaks over an apoptotic threshold, and selectively induced PC cell apoptosis, resulting in almost complete elimination of tumors in xenograft mice without obvious complications. Our findings provide new insight into DNA repair and apoptosis in cancer, and offer a new platform for developing novel anticancer therapeutics.
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Affiliation(s)
- Bo Yang
- Department of General Surgery, The Third Affiliated Hospital of Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- The First People's Hospital of Changzhou, Changzhou, 213003, P. R. China
| | - Bin Zhang
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- State Key Laboratory of Radiation Medicine, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- 2011 Collaborative Innovation Center of Hematology, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- Center of Systems Medicine, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100005, China
- Suzhou Institute of Systems Medicine, Suzhou, 215123, China
| | - Zhifei Cao
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, Soochow University, Suzhou, Jiangsu, 215123, P. R. China.
- State Key Laboratory of Radiation Medicine, Soochow University, Suzhou, Jiangsu, 215123, P. R. China.
- Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Soochow University, Suzhou, Jiangsu, 215123, P. R. China.
- 2011 Collaborative Innovation Center of Hematology, Soochow University, Suzhou, Jiangsu, 215123, P. R. China.
- Department of Pathology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, 215123, P. R. China.
| | - Xingdong Xu
- Department of General Surgery, The People's Hospital of China, Three Gorges University, Yichang, 443000, P. R. China
- The First People's Hospital of Yichang, Yichang, 443000, P. R. China
| | - Zihe Huo
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- State Key Laboratory of Radiation Medicine, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- 2011 Collaborative Innovation Center of Hematology, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Pan Zhang
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- State Key Laboratory of Radiation Medicine, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- 2011 Collaborative Innovation Center of Hematology, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Shufen Xiang
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- State Key Laboratory of Radiation Medicine, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- 2011 Collaborative Innovation Center of Hematology, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Zhe Zhao
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- State Key Laboratory of Radiation Medicine, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- 2011 Collaborative Innovation Center of Hematology, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Chunping Lv
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- State Key Laboratory of Radiation Medicine, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- 2011 Collaborative Innovation Center of Hematology, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Mei Meng
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- State Key Laboratory of Radiation Medicine, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- 2011 Collaborative Innovation Center of Hematology, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Gaochuan Zhang
- Department of Bioinformatics, College of Basic Medical Science, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Liang Dong
- Department of Pathology, College of Basic Medical Science, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Shucheng Shi
- Department of General Surgery, The Third Affiliated Hospital of Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- The First People's Hospital of Changzhou, Changzhou, 213003, P. R. China
| | - Lan Yang
- Department of General Surgery, The Third Affiliated Hospital of Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- The First People's Hospital of Changzhou, Changzhou, 213003, P. R. China
| | - Quansheng Zhou
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, Soochow University, Suzhou, Jiangsu, 215123, P. R. China.
- State Key Laboratory of Radiation Medicine, Soochow University, Suzhou, Jiangsu, 215123, P. R. China.
- Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Soochow University, Suzhou, Jiangsu, 215123, P. R. China.
- 2011 Collaborative Innovation Center of Hematology, Soochow University, Suzhou, Jiangsu, 215123, P. R. China.
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24
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Marcilla Vázquez C, Carrascosa Romero MDC, Martínez Gutiérrez A, Baquero Cano M, Alfaro Ponce B, Dabad Moreno MJ. A Novel c.968C > T homozygous Mutation in the Polynucleotide Kinase 3' - Phosphatase Gene Related to the Syndrome of Microcephaly, Seizures, and Developmental Delay. J Pediatr Genet 2020; 10:164-172. [PMID: 34040816 DOI: 10.1055/s-0040-1710540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 04/12/2020] [Indexed: 10/24/2022]
Abstract
Microcephaly is defined by a head circumference that is at least two standard deviations below the mean for age and sex of the general population in a specific race. Primary microcephaly may occur as an isolated inborn error, which may damage to the central nervous system or as part of the congenital abnormalities associated with genetic syndrome, affecting multiple organ systems. One of the syndromic forms consists of microcephaly, seizures, and developmental delay caused by biallelic mutations in the gene that encode polynucleotide kinase 3' - phosphatase protein (PNKP). In this article, we reported a newborn male who presented with microcephaly, severe developmental delay, and early-onset refractories seizures, caused by a novel homozygous mutation of the PNKP gene.
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25
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Luck K, Kim DK, Lambourne L, Spirohn K, Begg BE, Bian W, Brignall R, Cafarelli T, Campos-Laborie FJ, Charloteaux B, Choi D, Coté AG, Daley M, Deimling S, Desbuleux A, Dricot A, Gebbia M, Hardy MF, Kishore N, Knapp JJ, Kovács IA, Lemmens I, Mee MW, Mellor JC, Pollis C, Pons C, Richardson AD, Schlabach S, Teeking B, Yadav A, Babor M, Balcha D, Basha O, Bowman-Colin C, Chin SF, Choi SG, Colabella C, Coppin G, D'Amata C, De Ridder D, De Rouck S, Duran-Frigola M, Ennajdaoui H, Goebels F, Goehring L, Gopal A, Haddad G, Hatchi E, Helmy M, Jacob Y, Kassa Y, Landini S, Li R, van Lieshout N, MacWilliams A, Markey D, Paulson JN, Rangarajan S, Rasla J, Rayhan A, Rolland T, San-Miguel A, Shen Y, Sheykhkarimli D, Sheynkman GM, Simonovsky E, Taşan M, Tejeda A, Tropepe V, Twizere JC, Wang Y, Weatheritt RJ, Weile J, Xia Y, Yang X, Yeger-Lotem E, Zhong Q, Aloy P, Bader GD, De Las Rivas J, Gaudet S, Hao T, Rak J, Tavernier J, Hill DE, Vidal M, Roth FP, Calderwood MA. A reference map of the human binary protein interactome. Nature 2020; 580:402-408. [PMID: 32296183 PMCID: PMC7169983 DOI: 10.1038/s41586-020-2188-x] [Citation(s) in RCA: 595] [Impact Index Per Article: 148.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Accepted: 02/14/2020] [Indexed: 12/14/2022]
Abstract
Global insights into cellular organization and genome function require comprehensive understanding of the interactome networks that mediate genotype-phenotype relationships1,2. Here, we present a human “all-by-all” reference interactome map of human binary protein interactions, or “HuRI”. With ~53,000 high-quality protein-protein interactions (PPIs), HuRI has approximately four times more such interactions than high-quality curated interactions from small-scale studies. Integrating HuRI with genome3, transcriptome4, and proteome5 data enables the study of cellular function within most physiological or pathological cellular contexts. We demonstrate the utility of HuRI in identifying specific subcellular roles of PPIs. Inferred tissue-specific networks reveal general principles for the formation of cellular context-specific functions and elucidate potential molecular mechanisms underlying tissue-specific phenotypes of Mendelian diseases. HuRI represents a systematic proteome-wide reference linking genomic variation to phenotypic outcomes.
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Affiliation(s)
- Katja Luck
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Dae-Kyum Kim
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Lunenfeld-Tanenbaum Research Institute (LTRI), Sinai Health System, Toronto, Ontario, Canada
| | - Luke Lambourne
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Kerstin Spirohn
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Bridget E Begg
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Wenting Bian
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Ruth Brignall
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Tiziana Cafarelli
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Francisco J Campos-Laborie
- Cancer Research Center (CiC-IBMCC, CSIC/USAL), Consejo Superior de Investigaciones Científicas (CSIC) and University of Salamanca (USAL), Salamanca, Spain.,Institute for Biomedical Research of Salamanca (IBSAL), Salamanca, Spain
| | - Benoit Charloteaux
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Dongsic Choi
- The Research Institute of the McGill University Health Centre (RI-MUHC), Montreal, Quebec, Canada
| | - Atina G Coté
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Lunenfeld-Tanenbaum Research Institute (LTRI), Sinai Health System, Toronto, Ontario, Canada
| | - Meaghan Daley
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Steven Deimling
- Department of Cell and Systems Biology, University of Toronto, Toronto, Ontario, Canada
| | - Alice Desbuleux
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA.,Molecular Biology of Diseases, Groupe Interdisciplinaire de Génomique Appliquée (GIGA) and Laboratory of Viral Interactomes, University of Liège, Liège, Belgium
| | - Amélie Dricot
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Marinella Gebbia
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Lunenfeld-Tanenbaum Research Institute (LTRI), Sinai Health System, Toronto, Ontario, Canada
| | - Madeleine F Hardy
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Nishka Kishore
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Lunenfeld-Tanenbaum Research Institute (LTRI), Sinai Health System, Toronto, Ontario, Canada
| | - Jennifer J Knapp
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Lunenfeld-Tanenbaum Research Institute (LTRI), Sinai Health System, Toronto, Ontario, Canada
| | - István A Kovács
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Network Science Institute, Northeastern University, Boston, MA, USA.,Wigner Research Centre for Physics, Institute for Solid State Physics and Optics, Budapest, Hungary
| | - Irma Lemmens
- Center for Medical Biotechnology, Vlaams Instituut voor Biotechnologie (VIB), Ghent, Belgium.,Cytokine Receptor Laboratory (CRL), Department of Biomolecular Medicine, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Miles W Mee
- The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Department of Computer Science, University of Toronto, Toronto, Ontario, Canada
| | - Joseph C Mellor
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Lunenfeld-Tanenbaum Research Institute (LTRI), Sinai Health System, Toronto, Ontario, Canada.,seqWell, Beverly, MA, USA
| | - Carl Pollis
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Carles Pons
- Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute for Science and Technology, Barcelona, Catalonia, Spain
| | - Aaron D Richardson
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Sadie Schlabach
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Bridget Teeking
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Anupama Yadav
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Mariana Babor
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Lunenfeld-Tanenbaum Research Institute (LTRI), Sinai Health System, Toronto, Ontario, Canada
| | - Dawit Balcha
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Omer Basha
- Department of Clinical Biochemistry and Pharmacology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.,National Institute for Biotechnology in the Negev (NIBN), Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Christian Bowman-Colin
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Suet-Feung Chin
- Cancer Research UK (CRUK) Cambridge Institute, University of Cambridge, Cambridge, UK
| | - Soon Gang Choi
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Claudia Colabella
- Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy.,Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche "Togo Rosati" (IZSUM), Perugia, Italy
| | - Georges Coppin
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA.,Molecular Biology of Diseases, Groupe Interdisciplinaire de Génomique Appliquée (GIGA) and Laboratory of Viral Interactomes, University of Liège, Liège, Belgium
| | - Cassandra D'Amata
- Department of Cell and Systems Biology, University of Toronto, Toronto, Ontario, Canada
| | - David De Ridder
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Steffi De Rouck
- Center for Medical Biotechnology, Vlaams Instituut voor Biotechnologie (VIB), Ghent, Belgium.,Cytokine Receptor Laboratory (CRL), Department of Biomolecular Medicine, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Miquel Duran-Frigola
- Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute for Science and Technology, Barcelona, Catalonia, Spain
| | - Hanane Ennajdaoui
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Lunenfeld-Tanenbaum Research Institute (LTRI), Sinai Health System, Toronto, Ontario, Canada
| | - Florian Goebels
- The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Department of Computer Science, University of Toronto, Toronto, Ontario, Canada
| | - Liana Goehring
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Anjali Gopal
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Lunenfeld-Tanenbaum Research Institute (LTRI), Sinai Health System, Toronto, Ontario, Canada
| | - Ghazal Haddad
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Lunenfeld-Tanenbaum Research Institute (LTRI), Sinai Health System, Toronto, Ontario, Canada
| | - Elodie Hatchi
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Mohamed Helmy
- The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Department of Computer Science, University of Toronto, Toronto, Ontario, Canada
| | - Yves Jacob
- Département de Virologie, Unité de Génétique Moléculaire des Virus à ARN (GMVR), Institut Pasteur, UMR3569, Centre National de la Recherche Scientifique (CNRS), Paris, France.,Université Paris Diderot, Paris, France
| | - Yoseph Kassa
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Serena Landini
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Roujia Li
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Lunenfeld-Tanenbaum Research Institute (LTRI), Sinai Health System, Toronto, Ontario, Canada
| | - Natascha van Lieshout
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Lunenfeld-Tanenbaum Research Institute (LTRI), Sinai Health System, Toronto, Ontario, Canada
| | - Andrew MacWilliams
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Dylan Markey
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Joseph N Paulson
- Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Biostatistics, Harvard School of Public Health, Boston, MA, USA.,Department of Biostatistics, Product Development, Genentech Inc., South San Francisco, CA, USA
| | - Sudharshan Rangarajan
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - John Rasla
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Ashyad Rayhan
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Lunenfeld-Tanenbaum Research Institute (LTRI), Sinai Health System, Toronto, Ontario, Canada
| | - Thomas Rolland
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Adriana San-Miguel
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Yun Shen
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Dayag Sheykhkarimli
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Lunenfeld-Tanenbaum Research Institute (LTRI), Sinai Health System, Toronto, Ontario, Canada
| | - Gloria M Sheynkman
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Eyal Simonovsky
- Department of Clinical Biochemistry and Pharmacology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.,National Institute for Biotechnology in the Negev (NIBN), Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Murat Taşan
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Lunenfeld-Tanenbaum Research Institute (LTRI), Sinai Health System, Toronto, Ontario, Canada.,Department of Computer Science, University of Toronto, Toronto, Ontario, Canada
| | - Alexander Tejeda
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Vincent Tropepe
- Department of Cell and Systems Biology, University of Toronto, Toronto, Ontario, Canada
| | - Jean-Claude Twizere
- Molecular Biology of Diseases, Groupe Interdisciplinaire de Génomique Appliquée (GIGA) and Laboratory of Viral Interactomes, University of Liège, Liège, Belgium
| | - Yang Wang
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | | | - Jochen Weile
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Lunenfeld-Tanenbaum Research Institute (LTRI), Sinai Health System, Toronto, Ontario, Canada.,Department of Computer Science, University of Toronto, Toronto, Ontario, Canada
| | - Yu Xia
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Bioengineering, McGill University, Montreal, Quebec, Canada
| | - Xinping Yang
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Esti Yeger-Lotem
- Department of Clinical Biochemistry and Pharmacology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.,National Institute for Biotechnology in the Negev (NIBN), Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Quan Zhong
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Biological Sciences, Wright State University, Dayton, OH, USA
| | - Patrick Aloy
- Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute for Science and Technology, Barcelona, Catalonia, Spain.,Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Catalonia, Spain
| | - Gary D Bader
- The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Department of Computer Science, University of Toronto, Toronto, Ontario, Canada
| | - Javier De Las Rivas
- Cancer Research Center (CiC-IBMCC, CSIC/USAL), Consejo Superior de Investigaciones Científicas (CSIC) and University of Salamanca (USAL), Salamanca, Spain.,Institute for Biomedical Research of Salamanca (IBSAL), Salamanca, Spain
| | - Suzanne Gaudet
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Tong Hao
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA.,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Janusz Rak
- The Research Institute of the McGill University Health Centre (RI-MUHC), Montreal, Quebec, Canada
| | - Jan Tavernier
- Center for Medical Biotechnology, Vlaams Instituut voor Biotechnologie (VIB), Ghent, Belgium.,Cytokine Receptor Laboratory (CRL), Department of Biomolecular Medicine, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - David E Hill
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA. .,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA. .,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA.
| | - Marc Vidal
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA. .,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.
| | - Frederick P Roth
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA. .,The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada. .,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada. .,Lunenfeld-Tanenbaum Research Institute (LTRI), Sinai Health System, Toronto, Ontario, Canada. .,Department of Computer Science, University of Toronto, Toronto, Ontario, Canada. .,Canadian Institute for Advanced Research (CIFAR), Toronto, Ontario, Canada.
| | - Michael A Calderwood
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA. .,Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA. .,Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA.
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26
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Deficiency in classical nonhomologous end-joining-mediated repair of transcribed genes is linked to SCA3 pathogenesis. Proc Natl Acad Sci U S A 2020; 117:8154-8165. [PMID: 32205441 DOI: 10.1073/pnas.1917280117] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Spinocerebellar ataxia type 3 (SCA3) is a dominantly inherited neurodegenerative disease caused by CAG (encoding glutamine) repeat expansion in the Ataxin-3 (ATXN3) gene. We have shown previously that ATXN3-depleted or pathogenic ATXN3-expressing cells abrogate polynucleotide kinase 3'-phosphatase (PNKP) activity. Here, we report that ATXN3 associates with RNA polymerase II (RNAP II) and the classical nonhomologous end-joining (C-NHEJ) proteins, including PNKP, along with nascent RNAs under physiological conditions. Notably, ATXN3 depletion significantly decreased global transcription, repair of transcribed genes, and error-free double-strand break repair of a 3'-phosphate-containing terminally gapped, linearized reporter plasmid. The missing sequence at the terminal break site was restored in the recircularized plasmid in control cells by using the endogenous homologous transcript as a template, indicating ATXN3's role in PNKP-mediated error-free C-NHEJ. Furthermore, brain extracts from SCA3 patients and mice show significantly lower PNKP activity, elevated p53BP1 level, more abundant strand-breaks in the transcribed genes, and degradation of RNAP II relative to controls. A similar RNAP II degradation is also evident in mutant ATXN3-expressing Drosophila larval brains and eyes. Importantly, SCA3 phenotype in Drosophila was completely amenable to PNKP complementation. Hence, salvaging PNKP's activity can be a promising therapeutic strategy for SCA3.
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27
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Petri net-based model of the human DNA base excision repair pathway. PLoS One 2019; 14:e0217913. [PMID: 31518347 PMCID: PMC6743755 DOI: 10.1371/journal.pone.0217913] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Accepted: 05/21/2019] [Indexed: 12/14/2022] Open
Abstract
Cellular DNA is daily exposed to several damaging agents causing a plethora of DNA lesions. As a first aid to restore DNA integrity, several enzymes got specialized in damage recognition and lesion removal during the process called base excision repair (BER). A large number of DNA damage types and several different readers of nucleic acids lesions during BER pathway as well as two sub-pathways were considered in the definition of a model using the Petri net framework. The intuitive graphical representation in combination with precise mathematical analysis methods are the strong advantages of the Petri net-based representation of biological processes and make Petri nets a promising approach for modeling and analysis of human BER. The reported results provide new information that will aid efforts to characterize in silico knockouts as well as help to predict the sensitivity of the cell with inactivated repair proteins to different types of DNA damage. The results can also help in identifying the by-passing pathways that may lead to lack of pronounced phenotypes associated with mutations in some of the proteins. This knowledge is very useful when DNA damage-inducing drugs are introduced for cancer therapy, and lack of DNA repair is desirable for tumor cell death.
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28
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Bermúdez-Guzmán L, Leal A. DNA repair deficiency in neuropathogenesis: when all roads lead to mitochondria. Transl Neurodegener 2019; 8:14. [PMID: 31110700 PMCID: PMC6511134 DOI: 10.1186/s40035-019-0156-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 04/24/2019] [Indexed: 12/18/2022] Open
Abstract
Mutations in DNA repair enzymes can cause two neurological clinical manifestations: a developmental impairment and a degenerative disease. Polynucleotide kinase 3'-phosphatase (PNKP) is an enzyme that is actively involved in DNA repair in both single and double strand break repair systems. Mutations in this protein or others in the same pathway are responsible for a complex group of diseases with a broad clinical spectrum. Besides, mitochondrial dysfunction also has been consolidated as a hallmark of brain degeneration. Here we provide evidence that supports a shared role between mitochondrial dysfunction and DNA repair defects in the pathogenesis of the nervous system. As models, we analyze PNKP-related disorders, focusing on Charcot-Marie-Tooth disease and ataxia. A better understanding of the molecular dynamics of this relationship could provide improved diagnosis and treatment for neurological diseases.
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Affiliation(s)
- Luis Bermúdez-Guzmán
- Section of Genetics and Biotechnology, School of Biology, Universidad de Costa Rica, San José, 11501 Costa Rica
| | - Alejandro Leal
- Section of Genetics and Biotechnology, School of Biology, Universidad de Costa Rica, San José, 11501 Costa Rica
- Neuroscience Research Center, Universidad de Costa Rica, San José, Costa Rica
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29
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Kalasova I, Hanzlikova H, Gupta N, Li Y, Altmüller J, Reynolds JJ, Stewart GS, Wollnik B, Yigit G, Caldecott KW. Novel PNKP mutations causing defective DNA strand break repair and PARP1 hyperactivity in MCSZ. NEUROLOGY-GENETICS 2019; 5:e320. [PMID: 31041400 PMCID: PMC6454307 DOI: 10.1212/nxg.0000000000000320] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 02/07/2019] [Indexed: 11/29/2022]
Abstract
Objective To address the relationship between novel mutations in polynucleotide 5'-kinase 3'-phosphatase (PNKP), DNA strand break repair, and neurologic disease. Methods We have employed whole-exome sequencing, Sanger sequencing, and molecular/cellular biology. Results We describe here a patient with microcephaly with early onset seizures (MCSZ) from the Indian sub-continent harboring 2 novel mutations in PNKP, including a pathogenic mutation in the fork-head associated domain. In addition, we confirm that MCSZ is associated with hyperactivation of the single-strand break sensor protein protein poly (ADP-ribose) polymerase 1 (PARP1) following the induction of abortive topoisomerase I activity, a source of DNA strand breakage associated previously with neurologic disease. Conclusions These data expand the spectrum of PNKP mutations associated with MCSZ and show that PARP1 hyperactivation at unrepaired topoisomerase-induced DNA breaks is a molecular feature of this disease.
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Affiliation(s)
- Ilona Kalasova
- Department of Genome Dynamics (I.K., H.H., K.W.C.), Institute of Molecular Genetics of the Czech Academy of Sciences, Czech Republic; Genome Damage and Stability Centre (H.H., K.W.C.), School of Life Sciences, University of Sussex, Falmer, Brighton, UK; Institute of Human Genetics (Y.L., B.W., G.Y.), University Medical Center Göttingen, Germany; Cologne Center for Genomics (J.A.), University of Cologne, Germany; Institute of Cancer and Genomic Sciences (J.J.R., G.S.S.), College of Medical and Dental Sciences, University of Birmingham, UK; and Division of Genetics (N.G.), Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - Hana Hanzlikova
- Department of Genome Dynamics (I.K., H.H., K.W.C.), Institute of Molecular Genetics of the Czech Academy of Sciences, Czech Republic; Genome Damage and Stability Centre (H.H., K.W.C.), School of Life Sciences, University of Sussex, Falmer, Brighton, UK; Institute of Human Genetics (Y.L., B.W., G.Y.), University Medical Center Göttingen, Germany; Cologne Center for Genomics (J.A.), University of Cologne, Germany; Institute of Cancer and Genomic Sciences (J.J.R., G.S.S.), College of Medical and Dental Sciences, University of Birmingham, UK; and Division of Genetics (N.G.), Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - Neerja Gupta
- Department of Genome Dynamics (I.K., H.H., K.W.C.), Institute of Molecular Genetics of the Czech Academy of Sciences, Czech Republic; Genome Damage and Stability Centre (H.H., K.W.C.), School of Life Sciences, University of Sussex, Falmer, Brighton, UK; Institute of Human Genetics (Y.L., B.W., G.Y.), University Medical Center Göttingen, Germany; Cologne Center for Genomics (J.A.), University of Cologne, Germany; Institute of Cancer and Genomic Sciences (J.J.R., G.S.S.), College of Medical and Dental Sciences, University of Birmingham, UK; and Division of Genetics (N.G.), Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - Yun Li
- Department of Genome Dynamics (I.K., H.H., K.W.C.), Institute of Molecular Genetics of the Czech Academy of Sciences, Czech Republic; Genome Damage and Stability Centre (H.H., K.W.C.), School of Life Sciences, University of Sussex, Falmer, Brighton, UK; Institute of Human Genetics (Y.L., B.W., G.Y.), University Medical Center Göttingen, Germany; Cologne Center for Genomics (J.A.), University of Cologne, Germany; Institute of Cancer and Genomic Sciences (J.J.R., G.S.S.), College of Medical and Dental Sciences, University of Birmingham, UK; and Division of Genetics (N.G.), Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - Janine Altmüller
- Department of Genome Dynamics (I.K., H.H., K.W.C.), Institute of Molecular Genetics of the Czech Academy of Sciences, Czech Republic; Genome Damage and Stability Centre (H.H., K.W.C.), School of Life Sciences, University of Sussex, Falmer, Brighton, UK; Institute of Human Genetics (Y.L., B.W., G.Y.), University Medical Center Göttingen, Germany; Cologne Center for Genomics (J.A.), University of Cologne, Germany; Institute of Cancer and Genomic Sciences (J.J.R., G.S.S.), College of Medical and Dental Sciences, University of Birmingham, UK; and Division of Genetics (N.G.), Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - John J Reynolds
- Department of Genome Dynamics (I.K., H.H., K.W.C.), Institute of Molecular Genetics of the Czech Academy of Sciences, Czech Republic; Genome Damage and Stability Centre (H.H., K.W.C.), School of Life Sciences, University of Sussex, Falmer, Brighton, UK; Institute of Human Genetics (Y.L., B.W., G.Y.), University Medical Center Göttingen, Germany; Cologne Center for Genomics (J.A.), University of Cologne, Germany; Institute of Cancer and Genomic Sciences (J.J.R., G.S.S.), College of Medical and Dental Sciences, University of Birmingham, UK; and Division of Genetics (N.G.), Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - Grant S Stewart
- Department of Genome Dynamics (I.K., H.H., K.W.C.), Institute of Molecular Genetics of the Czech Academy of Sciences, Czech Republic; Genome Damage and Stability Centre (H.H., K.W.C.), School of Life Sciences, University of Sussex, Falmer, Brighton, UK; Institute of Human Genetics (Y.L., B.W., G.Y.), University Medical Center Göttingen, Germany; Cologne Center for Genomics (J.A.), University of Cologne, Germany; Institute of Cancer and Genomic Sciences (J.J.R., G.S.S.), College of Medical and Dental Sciences, University of Birmingham, UK; and Division of Genetics (N.G.), Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - Bernd Wollnik
- Department of Genome Dynamics (I.K., H.H., K.W.C.), Institute of Molecular Genetics of the Czech Academy of Sciences, Czech Republic; Genome Damage and Stability Centre (H.H., K.W.C.), School of Life Sciences, University of Sussex, Falmer, Brighton, UK; Institute of Human Genetics (Y.L., B.W., G.Y.), University Medical Center Göttingen, Germany; Cologne Center for Genomics (J.A.), University of Cologne, Germany; Institute of Cancer and Genomic Sciences (J.J.R., G.S.S.), College of Medical and Dental Sciences, University of Birmingham, UK; and Division of Genetics (N.G.), Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - Gökhan Yigit
- Department of Genome Dynamics (I.K., H.H., K.W.C.), Institute of Molecular Genetics of the Czech Academy of Sciences, Czech Republic; Genome Damage and Stability Centre (H.H., K.W.C.), School of Life Sciences, University of Sussex, Falmer, Brighton, UK; Institute of Human Genetics (Y.L., B.W., G.Y.), University Medical Center Göttingen, Germany; Cologne Center for Genomics (J.A.), University of Cologne, Germany; Institute of Cancer and Genomic Sciences (J.J.R., G.S.S.), College of Medical and Dental Sciences, University of Birmingham, UK; and Division of Genetics (N.G.), Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - Keith W Caldecott
- Department of Genome Dynamics (I.K., H.H., K.W.C.), Institute of Molecular Genetics of the Czech Academy of Sciences, Czech Republic; Genome Damage and Stability Centre (H.H., K.W.C.), School of Life Sciences, University of Sussex, Falmer, Brighton, UK; Institute of Human Genetics (Y.L., B.W., G.Y.), University Medical Center Göttingen, Germany; Cologne Center for Genomics (J.A.), University of Cologne, Germany; Institute of Cancer and Genomic Sciences (J.J.R., G.S.S.), College of Medical and Dental Sciences, University of Birmingham, UK; and Division of Genetics (N.G.), Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
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30
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Aceytuno RD, Piett CG, Havali-Shahriari Z, Edwards RA, Rey M, Ye R, Javed F, Fang S, Mani R, Weinfeld M, Hammel M, Tainer JA, Schriemer DC, Lees-Miller SP, Glover JNM. Structural and functional characterization of the PNKP-XRCC4-LigIV DNA repair complex. Nucleic Acids Res 2017; 45:6238-6251. [PMID: 28453785 PMCID: PMC5449630 DOI: 10.1093/nar/gkx275] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 04/25/2017] [Indexed: 01/14/2023] Open
Abstract
Non-homologous end joining (NHEJ) repairs DNA double strand breaks in non-cycling eukaryotic cells. NHEJ relies on polynucleotide kinase/phosphatase (PNKP), which generates 5΄-phosphate/3΄-hydroxyl DNA termini that are critical for ligation by the NHEJ DNA ligase, LigIV. PNKP and LigIV require the NHEJ scaffolding protein, XRCC4. The PNKP FHA domain binds to the CK2-phosphorylated XRCC4 C-terminal tail, while LigIV uses its tandem BRCT repeats to bind the XRCC4 coiled-coil. Yet, the assembled PNKP-XRCC4–LigIV complex remains uncharacterized. Here, we report purification and characterization of a recombinant PNKP–XRCC4–LigIV complex. We show that the stable binding of PNKP in this complex requires XRCC4 phosphorylation and that only one PNKP protomer binds per XRCC4 dimer. Small angle X-ray scattering (SAXS) reveals a flexible multi-state complex that suggests that both the PNKP FHA and catalytic domains contact the XRCC4 coiled-coil and LigIV BRCT repeats. Hydrogen-deuterium exchange indicates protection of a surface on the PNKP phosphatase domain that may contact XRCC4–LigIV. A mutation on this surface (E326K) causes the hereditary neuro-developmental disorder, MCSZ. This mutation impairs PNKP recruitment to damaged DNA in human cells and provides a possible disease mechanism. Together, this work unveils multipoint contacts between PNKP and XRCC4–LigIV that regulate PNKP recruitment and activity within NHEJ.
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Affiliation(s)
- R Daniel Aceytuno
- Department of Biochemistry, University of Alberta, Edmonton, AB T6G-2H7, Canada
| | - Cortt G Piett
- Department of Biochemistry & Molecular Biology, Robson DNA Science Centre, Arnie Charbonneau Cancer Institute, University of Calgary, Calgary, AB T2N 1N4, Canada
| | | | - Ross A Edwards
- Department of Biochemistry, University of Alberta, Edmonton, AB T6G-2H7, Canada
| | - Martial Rey
- Department of Biochemistry & Molecular Biology, Robson DNA Science Centre, Arnie Charbonneau Cancer Institute, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Ruiqiong Ye
- Department of Biochemistry & Molecular Biology, Robson DNA Science Centre, Arnie Charbonneau Cancer Institute, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Fatima Javed
- Department of Biochemistry, University of Alberta, Edmonton, AB T6G-2H7, Canada
| | - Shujuan Fang
- Department of Biochemistry & Molecular Biology, Robson DNA Science Centre, Arnie Charbonneau Cancer Institute, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Rajam Mani
- Department of Oncology, University of Alberta, Cross Cancer Institute, 11560 University Avenue, Edmonton, Alberta T6G 1Z2, Canada
| | - Michael Weinfeld
- Department of Oncology, University of Alberta, Cross Cancer Institute, 11560 University Avenue, Edmonton, Alberta T6G 1Z2, Canada
| | - Michal Hammel
- Molecular Biophysics & Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - John A Tainer
- Molecular Biophysics & Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.,Department of Molecular and Cellular Oncology, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA
| | - David C Schriemer
- Department of Biochemistry & Molecular Biology, Robson DNA Science Centre, Arnie Charbonneau Cancer Institute, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Susan P Lees-Miller
- Department of Biochemistry & Molecular Biology, Robson DNA Science Centre, Arnie Charbonneau Cancer Institute, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - J N Mark Glover
- Department of Biochemistry, University of Alberta, Edmonton, AB T6G-2H7, Canada
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31
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Zeng Z, Rulten SL, Breslin C, Zlatanou A, Coulthard V, Caldecott KW. Acylpeptide hydrolase is a component of the cellular response to DNA damage. DNA Repair (Amst) 2017; 58:52-61. [DOI: 10.1016/j.dnarep.2017.08.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Revised: 08/18/2017] [Accepted: 08/18/2017] [Indexed: 10/19/2022]
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32
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Breslin C, Mani RS, Fanta M, Hoch N, Weinfeld M, Caldecott KW. The Rev1 interacting region (RIR) motif in the scaffold protein XRCC1 mediates a low-affinity interaction with polynucleotide kinase/phosphatase (PNKP) during DNA single-strand break repair. J Biol Chem 2017; 292:16024-16031. [PMID: 28821613 PMCID: PMC5625035 DOI: 10.1074/jbc.m117.806638] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 08/15/2017] [Indexed: 11/22/2022] Open
Abstract
The scaffold protein X-ray repair cross-complementing 1 (XRCC1) interacts with multiple enzymes involved in DNA base excision repair and single-strand break repair (SSBR) and is important for genetic integrity and normal neurological function. One of the most important interactions of XRCC1 is that with polynucleotide kinase/phosphatase (PNKP), a dual-function DNA kinase/phosphatase that processes damaged DNA termini and that, if mutated, results in ataxia with oculomotor apraxia 4 (AOA4) and microcephaly with early-onset seizures and developmental delay (MCSZ). XRCC1 and PNKP interact via a high-affinity phosphorylation-dependent interaction site in XRCC1 and a forkhead-associated domain in PNKP. Here, we identified using biochemical and biophysical approaches a second PNKP interaction site in XRCC1 that binds PNKP with lower affinity and independently of XRCC1 phosphorylation. However, this interaction nevertheless stimulated PNKP activity and promoted SSBR and cell survival. The low-affinity interaction site required the highly conserved Rev1-interacting region (RIR) motif in XRCC1 and included three critical and evolutionarily invariant phenylalanine residues. We propose a bipartite interaction model in which the previously identified high-affinity interaction acts as a molecular tether, holding XRCC1 and PNKP together and thereby promoting the low-affinity interaction identified here, which then stimulates PNKP directly.
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Affiliation(s)
- Claire Breslin
- From the Genome Damage and Stability Centre, School of Life Sciences, University of Sussex, Science Park Road, Falmer, Brighton BN19RQ, United Kingdom
| | - Rajam S Mani
- the Department of Experimental Oncology, Cross Cancer Institute, Edmonton, Alberta T6G 1Z2, Canada, and
| | - Mesfin Fanta
- the Department of Experimental Oncology, Cross Cancer Institute, Edmonton, Alberta T6G 1Z2, Canada, and
| | - Nicolas Hoch
- From the Genome Damage and Stability Centre, School of Life Sciences, University of Sussex, Science Park Road, Falmer, Brighton BN19RQ, United Kingdom.,the CAPES Foundation, Ministry of Education of Brazil, Brasilia/DF 70040-020, Brazil
| | - Michael Weinfeld
- the Department of Experimental Oncology, Cross Cancer Institute, Edmonton, Alberta T6G 1Z2, Canada, and
| | - Keith W Caldecott
- From the Genome Damage and Stability Centre, School of Life Sciences, University of Sussex, Science Park Road, Falmer, Brighton BN19RQ, United Kingdom,
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33
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Abstract
Multiple DNA repair pathways maintain genome stability and ensure that DNA remains essentially unchanged over the life of a cell. Various human diseases occur if DNA repair is compromised, and most of these impact the nervous system, in some cases exclusively. However, it is often unclear what specific endogenous damage underpins disease pathology. Generally, the types of causative DNA damage are associated with replication, transcription, or oxidative metabolism; other direct sources of endogenous lesions may arise from aberrant topoisomerase activity or ribonucleotide incorporation into DNA. This review focuses on the etiology of DNA damage in the nervous system and the genome stability pathways that prevent human neurologic disease.
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Affiliation(s)
- Peter J McKinnon
- Department of Genetics, St Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
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Jiang B, Glover JNM, Weinfeld M. Neurological disorders associated with DNA strand-break processing enzymes. Mech Ageing Dev 2016; 161:130-140. [PMID: 27470939 DOI: 10.1016/j.mad.2016.07.009] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 07/21/2016] [Accepted: 07/23/2016] [Indexed: 12/24/2022]
Abstract
The termini of DNA strand breaks induced by reactive oxygen species or by abortive DNA metabolic intermediates require processing to enable subsequent gap filling and ligation to proceed. The three proteins, tyrosyl DNA-phosphodiesterase 1 (TDP1), aprataxin (APTX) and polynucleotide kinase/phosphatase (PNKP) each act on a discrete set of modified strand-break termini. Recently, a series of neurodegenerative and neurodevelopmental disorders have been associated with mutations in the genes coding for these proteins. Mutations in TDP1 and APTX have been linked to Spinocerebellar ataxia with axonal neuropathy (SCAN1) and Ataxia-ocular motor apraxia 1 (AOA1), respectively, while mutations in PNKP are considered to be responsible for Microcephaly with seizures (MCSZ) and Ataxia-ocular motor apraxia 4 (AOA4). Here we present an overview of the mechanisms of these proteins and how their impairment may give rise to their respective disorders.
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Affiliation(s)
- Bingcheng Jiang
- Department of Oncology, University of Alberta, Cross Cancer Institute, 11560 University Avenue, Edmonton, Alberta, T6G 1Z2, Canada.
| | - J N Mark Glover
- Department of Biochemistry, Medical Sciences Building, University of Alberta, Edmonton, Alberta, T6G 2H7, Canada.
| | - Michael Weinfeld
- Department of Oncology, University of Alberta, Cross Cancer Institute, 11560 University Avenue, Edmonton, Alberta, T6G 1Z2, Canada.
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Nair P, Hamzeh AR, Mohamed M, Saif F, Tawfiq N, El Halik M, Al-Ali MT, Bastaki F. Microcephalic primordial dwarfism in an Emirati patient with PNKP mutation. Am J Med Genet A 2016; 170:2127-32. [PMID: 27232581 DOI: 10.1002/ajmg.a.37766] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Accepted: 05/09/2016] [Indexed: 11/11/2022]
Abstract
Microcephaly is a rare neurological condition, both in isolation and when it occurs as part of a syndrome. One of the syndromic forms of microcephaly is microcephaly, seizures and developmental delay (MCSZ) (OMIM #613402), a rare autosomal recessive neurodevelopmental disorder with a range of phenotypic severity, and known to be caused by mutations in the polynucleotide kinase 3' phosphatase (PNKP) gene. The PNK protein is a key enzyme involved in the repair of single and double stranded DNA breaks, a process which is particularly important in the nervous system. We describe an Emirati patient who presented with microcephaly, short stature, uncontrollable tonic-clonic seizures, facial dysmorphism, and developmental delay, while at the same time showing evidence of brain atrophy and agenesis of the corpus callosum. We used whole exome sequencing to identify homozygosity for a missense c.1385G > C (p.Arg462Pro) mutation in PNKP in the patient and heterozygosity for this mutation in her consanguineous parents. The Arg 462 residue forms a part of the lid subdomain helix of the P-loop Kinase domain. Although our patient's phenotype resembled that of MCSZ, the short stature and evidence of brain atrophy distinguished it from other classic cases of the condition. The report raises the question of whether to consider this case as an atypical variant of MCSZ or as a novel form of microcephalic primordial dwarfism. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
| | | | - Madiha Mohamed
- Pediatric Department, Latifa Hospital, Dubai Health Authority, Dubai, UAE
| | - Fatima Saif
- Pediatric Department, Latifa Hospital, Dubai Health Authority, Dubai, UAE
| | - Nafisa Tawfiq
- Pediatric Department, Latifa Hospital, Dubai Health Authority, Dubai, UAE
| | - Majdi El Halik
- Pediatric Department, Latifa Hospital, Dubai Health Authority, Dubai, UAE
| | | | - Fatma Bastaki
- Pediatric Department, Latifa Hospital, Dubai Health Authority, Dubai, UAE
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Dumitrache LC, McKinnon PJ. Polynucleotide kinase-phosphatase (PNKP) mutations and neurologic disease. Mech Ageing Dev 2016; 161:121-129. [PMID: 27125728 DOI: 10.1016/j.mad.2016.04.009] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 04/12/2016] [Accepted: 04/24/2016] [Indexed: 12/30/2022]
Abstract
A variety of human neurologic diseases are caused by inherited defects in DNA repair. In many cases, these syndromes almost exclusively impact the nervous system, underscoring the critical requirement for genome stability in this tissue. A striking example of this is defective enzymatic activity of polynucleotide kinase-phosphatase (PNKP), leading to microcephaly or neurodegeneration. Notably, the broad neural impact of mutations in PNKP can result in markedly different disease entities, even when the inherited mutation is the same. For example microcephaly with seizures (MCSZ) results from various hypomorphic PNKP mutations, as does ataxia with oculomotor apraxia 4 (AOA4). Thus, other contributing factors influence the neural phenotype when PNKP is disabled. Here we consider the role for PNKP in maintaining brain function and how perturbation in its activity can account for the varied pathology of neurodegeneration or microcephaly present in MCSZ and AOA4 respectively.
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Affiliation(s)
- Lavinia C Dumitrache
- Dept. of Genetics, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Peter J McKinnon
- Dept. of Genetics, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
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Hackmann K, Rump A, Haas SA, Lemke JR, Fryns JP, Tzschach A, Wieczorek D, Albrecht B, Kuechler A, Ripperger T, Kobelt A, Oexle K, Tinschert S, Schrock E, Kalscheuer VM, Di Donato N. Tentative clinical diagnosis of Lujan-Fryns syndrome-A conglomeration of different genetic entities? Am J Med Genet A 2015; 170A:94-102. [DOI: 10.1002/ajmg.a.37378] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 08/24/2015] [Indexed: 01/16/2023]
Affiliation(s)
- Karl Hackmann
- Institut fuer Klinische Genetik; Medizinische Fakultaet Carl Gustav Carus; Technische Universitaet Dresden; Dresden Germany
| | - Andreas Rump
- Institut fuer Klinische Genetik; Medizinische Fakultaet Carl Gustav Carus; Technische Universitaet Dresden; Dresden Germany
| | - Stefan A. Haas
- Department of Computational Molecular Biology; Max Planck Institute for Molecular Genetics; Berlin Germany
| | - Johannes R. Lemke
- Division of Human Genetics; University Children's Hospital Inselspital; Bern Switzerland
| | - Jean-Pierre Fryns
- Centre for Human Genetics; KU Leuven/University Hospital Leuven; Leuven Belgium
| | - Andreas Tzschach
- Institut fuer Medizinische Genetik und Angewandte Genomik; Universitaetsklinikum; Tuebingen Germany
| | - Dagmar Wieczorek
- Institut für Humangenetik; Universitätsklinikum Essen; Universitaet Duisburg-Essen; Essen Germany
| | - Beate Albrecht
- Institut für Humangenetik; Universitätsklinikum Essen; Universitaet Duisburg-Essen; Essen Germany
| | - Alma Kuechler
- Institut für Humangenetik; Universitätsklinikum Essen; Universitaet Duisburg-Essen; Essen Germany
| | - Tim Ripperger
- Institute of Cell and Molecular Pathology; Hannover Medical School; Hannover Germany
| | - Albrecht Kobelt
- Zentrum fuer Diagnostik GmbH MVZ; Praxis fuer Humangenetik; Klinikum Chemnitz; Chemnitz Germany
| | - Konrad Oexle
- Institut fuer Klinische Genetik; Medizinische Fakultaet Carl Gustav Carus; Technische Universitaet Dresden; Dresden Germany
| | - Sigrid Tinschert
- Institut fuer Klinische Genetik; Medizinische Fakultaet Carl Gustav Carus; Technische Universitaet Dresden; Dresden Germany
| | - Evelin Schrock
- Institut fuer Klinische Genetik; Medizinische Fakultaet Carl Gustav Carus; Technische Universitaet Dresden; Dresden Germany
| | - Vera M. Kalscheuer
- Department of Human Molecular Genetics; Max Planck Institute for Molecular Genetics; Berlin Germany
| | - Nataliya Di Donato
- Institut fuer Klinische Genetik; Medizinische Fakultaet Carl Gustav Carus; Technische Universitaet Dresden; Dresden Germany
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Shimada M, Dumitrache LC, Russell HR, McKinnon PJ. Polynucleotide kinase-phosphatase enables neurogenesis via multiple DNA repair pathways to maintain genome stability. EMBO J 2015; 34:2465-80. [PMID: 26290337 DOI: 10.15252/embj.201591363] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 07/09/2015] [Indexed: 11/09/2022] Open
Abstract
Polynucleotide kinase-phosphatase (PNKP) is a DNA repair factor possessing both 5'-kinase and 3'-phosphatase activities to modify ends of a DNA break prior to ligation. Recently, decreased PNKP levels were identified as the cause of severe neuropathology present in the human microcephaly with seizures (MCSZ) syndrome. Utilizing novel murine Pnkp alleles that attenuate expression and a T424GfsX48 frame-shift allele identified in MCSZ individuals, we determined how PNKP inactivation impacts neurogenesis. Mice with PNKP inactivation in neural progenitors manifest neurodevelopmental abnormalities and postnatal death. This severe phenotype involved defective base excision repair and non-homologous end-joining, pathways required for repair of both DNA single- and double-strand breaks. Although mice homozygous for the T424GfsX48 allele were lethal embryonically, attenuated PNKP levels (akin to MCSZ) showed general neurodevelopmental defects, including microcephaly, indicating a critical developmental PNKP threshold. Directed postnatal neural inactivation of PNKP affected specific subpopulations including oligodendrocytes, indicating a broad requirement for genome maintenance, both during and after neurogenesis. These data illuminate the basis for selective neural vulnerability in DNA repair deficiency disease.
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Affiliation(s)
- Mikio Shimada
- Department of Genetics, St Jude Children's Research Hospital, Memphis, TN, USA
| | | | - Helen R Russell
- Department of Genetics, St Jude Children's Research Hospital, Memphis, TN, USA
| | - Peter J McKinnon
- Department of Genetics, St Jude Children's Research Hospital, Memphis, TN, USA
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Bras J, Alonso I, Barbot C, Costa M, Darwent L, Orme T, Sequeiros J, Hardy J, Coutinho P, Guerreiro R. Mutations in PNKP cause recessive ataxia with oculomotor apraxia type 4. Am J Hum Genet 2015; 96:474-9. [PMID: 25728773 PMCID: PMC4375449 DOI: 10.1016/j.ajhg.2015.01.005] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Accepted: 01/09/2015] [Indexed: 11/13/2022] Open
Abstract
Hereditary autosomal-recessive cerebellar ataxias are a genetically and clinically heterogeneous group of disorders. We used homozygosity mapping and exome sequencing to study a cohort of nine Portuguese families who were identified during a nationwide, population-based, systematic survey as displaying a consistent phenotype of recessive ataxia with oculomotor apraxia (AOA). The integration of data from these analyses led to the identification of the same homozygous PNKP (polynucleotide kinase 3′-phosphatase) mutation, c.1123G>T (p.Gly375Trp), in three of the studied families. When analyzing this particular gene in the exome sequencing data from the remaining cohort, we identified homozygous or compound-heterozygous mutations in five other families. PNKP is a dual-function enzyme with a key role in different pathways of DNA-damage repair. Mutations in this gene have previously been associated with an autosomal-recessive syndrome characterized by microcephaly; early-onset, intractable seizures; and developmental delay (MCSZ). The finding of PNKP mutations associated with recessive AOA extends the phenotype associated with this gene and identifies a fourth locus that causes AOA. These data confirm that MCSZ and some forms of ataxia share etiological features, most likely reflecting the role of PNKP in DNA-repair mechanisms.
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40
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Autosomal Recessive Ataxias Due to Defects in DNA Repair. Mov Disord 2015. [DOI: 10.1016/b978-0-12-405195-9.00067-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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41
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Andres SN, Schellenberg MJ, Wallace BD, Tumbale P, Williams RS. Recognition and repair of chemically heterogeneous structures at DNA ends. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2015; 56:1-21. [PMID: 25111769 PMCID: PMC4303525 DOI: 10.1002/em.21892] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2014] [Accepted: 07/28/2014] [Indexed: 05/13/2023]
Abstract
Exposure to environmental toxicants and stressors, radiation, pharmaceutical drugs, inflammation, cellular respiration, and routine DNA metabolism all lead to the production of cytotoxic DNA strand breaks. Akin to splintered wood, DNA breaks are not "clean." Rather, DNA breaks typically lack DNA 5'-phosphate and 3'-hydroxyl moieties required for DNA synthesis and DNA ligation. Failure to resolve damage at DNA ends can lead to abnormal DNA replication and repair, and is associated with genomic instability, mutagenesis, neurological disease, ageing and carcinogenesis. An array of chemically heterogeneous DNA termini arises from spontaneously generated DNA single-strand and double-strand breaks (SSBs and DSBs), and also from normal and/or inappropriate DNA metabolism by DNA polymerases, DNA ligases and topoisomerases. As a front line of defense to these genotoxic insults, eukaryotic cells have accrued an arsenal of enzymatic first responders that bind and protect damaged DNA termini, and enzymatically tailor DNA ends for DNA repair synthesis and ligation. These nucleic acid transactions employ direct damage reversal enzymes including Aprataxin (APTX), Polynucleotide kinase phosphatase (PNK), the tyrosyl DNA phosphodiesterases (TDP1 and TDP2), the Ku70/80 complex and DNA polymerase β (POLβ). Nucleolytic processing enzymes such as the MRE11/RAD50/NBS1/CtIP complex, Flap endonuclease (FEN1) and the apurinic endonucleases (APE1 and APE2) also act in the chemical "cleansing" of DNA breaks to prevent genomic instability and disease, and promote progression of DNA- and RNA-DNA damage response (DDR and RDDR) pathways. Here, we provide an overview of cellular first responders dedicated to the detection and repair of abnormal DNA termini.
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Affiliation(s)
- Sara N Andres
- Laboratory of Structural Biology, National Institute of Environmental Health Sciences, NIH, DHHS, North Carolina
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42
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Gao R, Liu Y, Silva-Fernandes A, Fang X, Paulucci-Holthauzen A, Chatterjee A, Zhang HL, Matsuura T, Choudhary S, Ashizawa T, Koeppen AH, Maciel P, Hazra TK, Sarkar PS. Inactivation of PNKP by mutant ATXN3 triggers apoptosis by activating the DNA damage-response pathway in SCA3. PLoS Genet 2015; 11:e1004834. [PMID: 25590633 PMCID: PMC4295939 DOI: 10.1371/journal.pgen.1004834] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Accepted: 10/16/2014] [Indexed: 12/30/2022] Open
Abstract
Spinocerebellar ataxia type 3 (SCA3), also known as Machado-Joseph disease (MJD), is an untreatable autosomal dominant neurodegenerative disease, and the most common such inherited ataxia worldwide. The mutation in SCA3 is the expansion of a polymorphic CAG tri-nucleotide repeat sequence in the C-terminal coding region of the ATXN3 gene at chromosomal locus 14q32.1. The mutant ATXN3 protein encoding expanded glutamine (polyQ) sequences interacts with multiple proteins in vivo, and is deposited as aggregates in the SCA3 brain. A large body of literature suggests that the loss of function of the native ATNX3-interacting proteins that are deposited in the polyQ aggregates contributes to cellular toxicity, systemic neurodegeneration and the pathogenic mechanism in SCA3. Nonetheless, a significant understanding of the disease etiology of SCA3, the molecular mechanism by which the polyQ expansions in the mutant ATXN3 induce neurodegeneration in SCA3 has remained elusive. In the present study, we show that the essential DNA strand break repair enzyme PNKP (polynucleotide kinase 3'-phosphatase) interacts with, and is inactivated by, the mutant ATXN3, resulting in inefficient DNA repair, persistent accumulation of DNA damage/strand breaks, and subsequent chronic activation of the DNA damage-response ataxia telangiectasia-mutated (ATM) signaling pathway in SCA3. We report that persistent accumulation of DNA damage/strand breaks and chronic activation of the serine/threonine kinase ATM and the downstream p53 and protein kinase C-δ pro-apoptotic pathways trigger neuronal dysfunction and eventually neuronal death in SCA3. Either PNKP overexpression or pharmacological inhibition of ATM dramatically blocked mutant ATXN3-mediated cell death. Discovery of the mechanism by which mutant ATXN3 induces DNA damage and amplifies the pro-death signaling pathways provides a molecular basis for neurodegeneration due to PNKP inactivation in SCA3, and for the first time offers a possible approach to treatment.
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Affiliation(s)
- Rui Gao
- Department of Neurology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Yongping Liu
- Department of Neurology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Anabela Silva-Fernandes
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal
- ICVS/3B’s PT Government Associate Laboratory, Braga/Guimarặes, Portugal
| | - Xiang Fang
- Department of Neurology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Adriana Paulucci-Holthauzen
- Department of Biomedical Engineering, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Arpita Chatterjee
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Hang L. Zhang
- Department of Neurology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Tohru Matsuura
- Department of Neurology, Jichi Medical School, Shimotsuke, Japan
| | - Sanjeev Choudhary
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Tetsuo Ashizawa
- Department of Neurology and McNight Brain Research Institute, University of Florida, Gainesville, Florida, United States of America
| | - Arnulf H. Koeppen
- Department of Neurology, Albany Stratton VA Medical Center, Albany, New York, United States of America
| | - Patricia Maciel
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal
- ICVS/3B’s PT Government Associate Laboratory, Braga/Guimarặes, Portugal
| | - Tapas K. Hazra
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Partha S. Sarkar
- Department of Neurology, University of Texas Medical Branch, Galveston, Texas, United States of America
- Neuroscience and Cell Biology, University of Texas Medical Branch, Galveston, Texas, United States of America
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43
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Structures of bacterial polynucleotide kinase in a michaelis complex with nucleoside triphosphate (NTP)-Mg2+ and 5'-OH RNA and a mixed substrate-product complex with NTP-Mg2+ and a 5'-phosphorylated oligonucleotide. J Bacteriol 2014; 196:4285-92. [PMID: 25266383 DOI: 10.1128/jb.02197-14] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Clostridium thermocellum polynucleotide kinase (CthPnk), the 5'-end-healing module of a bacterial RNA repair system, catalyzes reversible phosphoryl transfer from a nucleoside triphosphate (NTP) donor to a 5'-OH polynucleotide acceptor, either DNA or RNA. Here we report the 1.5-Å crystal structure of CthPnk-D38N in a Michaelis complex with GTP-Mg(2+) and a 5'-OH RNA oligonucleotide. The RNA-binding mode of CthPnk is different from that of the metazoan RNA kinase Clp1. CthPnk makes hydrogen bonds to the ribose 2'-hydroxyls of the 5' terminal nucleoside, via Gln51, and the penultimate nucleoside, via Gln83. The 5'-terminal nucleobase is sandwiched by Gln51 and Val129. Mutating Gln51 or Val129 to alanine reduced kinase specific activity 3-fold. Ser37 and Thr80 donate functionally redundant hydrogen bonds to the terminal phosphodiester; a S37A-T80A double mutation reduced kinase activity 50-fold. Crystallization of catalytically active CthPnk with GTP-Mg(2+) and a 5'-OH DNA yielded a mixed substrate-product complex with GTP-Mg(2+) and 5'-PO4 DNA, wherein the product 5' phosphate group is displaced by the NTP γ phosphate and the local architecture of the acceptor site is perturbed.
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44
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DNA repair abnormalities leading to ataxia: shared neurological phenotypes and risk factors. Neurogenetics 2014; 15:217-28. [PMID: 25038946 DOI: 10.1007/s10048-014-0415-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Accepted: 07/11/2014] [Indexed: 02/06/2023]
Abstract
Since identification of mutations in the ATM gene leading to ataxia-telangiectasia, enormous efforts have been devoted to discovering the roles this protein plays in DNA repair as well as other cellular functions. Even before the identification of ATM mutations, it was clear that other diseases with different genomic loci had very similar neurological symptoms. There has been significant progress in understanding why cancer and immunodeficiency occur in ataxia-telangiectasia even though many details remain to be determined, but the field is no closer to determining why the nervous system requires ATM and other DNA repair genes. Even though rodent disease models have similar DNA repair abnormalities as the human diseases, they have no consistent, robust neuropathological phenotype making it difficult to understand the neurological underpinnings of disease. Therefore, it may be useful to reassess the neurological and neuropathological characteristics of ataxia-telangiectasia in human patients to look for potential commonalities in DNA repair diseases that result in ataxia. In doing so, it is clear that ataxia-telangiectasia and similar diseases share neurological features other than merely ataxia, such as length-dependent motor and sensory neuropathies, and that the neuroanatomical localization for these symptoms is understood. Cells affected in ataxia-telangiectasia and similar diseases are some of the largest single nucleated cells in the body. In addition, a subset of these diseases also has extrapyramidal movements and oculomotor apraxia. These neurological and neuropathological similarities may indicate a common DNA repair related pathogenesis with very large cell size as a critical risk factor.
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45
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Causative novel PNKP mutations and concomitant PCDH15 mutations in a patient with microcephaly with early-onset seizures and developmental delay syndrome and hearing loss. J Hum Genet 2014; 59:471-4. [PMID: 24965255 DOI: 10.1038/jhg.2014.51] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Revised: 05/03/2014] [Accepted: 06/05/2014] [Indexed: 12/25/2022]
Abstract
We report on a 1-year-old boy with microcephaly with a simplified gyral pattern, early-onset seizures, congenital hearing loss and a severe developmental delay. Trio-based whole-exome sequencing identified candidate compound heterozygous mutations in two genes: c.163G>T (p.Ala55Ser) and c.874G>A (p.Gly292Arg) in polynucleotide kinase 3'-phosphatase gene (PNKP), and c.195G>A (p.Met65Ile) and c.1210A>C (p.Ser404Arg) in PCDH15. PNKP and PCDH15 mutations have been reported in autosomal recessive microcephaly with early-onset seizures and developmental delay syndrome, and Usher syndrome type 1F, respectively. Our patient showed neurological features similar to reported cases of both syndromes that could be explained by the observed mutations in both PNKP and PCDH15, which therefore appear to be pathogenic in this case.
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46
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Tang W, Zhu G, Zhang CY. Sensitive detection of polynucleotide kinase using rolling circle amplification-induced chemiluminescence. Chem Commun (Camb) 2014; 50:4733-5. [DOI: 10.1039/c4cc00256c] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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47
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McKinnon PJ. Maintaining genome stability in the nervous system. Nat Neurosci 2013; 16:1523-9. [PMID: 24165679 PMCID: PMC4112580 DOI: 10.1038/nn.3537] [Citation(s) in RCA: 165] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Accepted: 09/11/2013] [Indexed: 01/09/2023]
Abstract
Active maintenance of genome stability is a prerequisite for the development and function of the nervous system. The high replication index during neurogenesis and the long life of mature neurons highlight the need for efficient cellular programs to safeguard genetic fidelity. Multiple DNA damage response pathways ensure that replication stress and other types of DNA lesions, such as oxidative damage, do not affect neural homeostasis. Numerous human neurologic syndromes result from defective DNA damage signaling and compromised genome integrity. These syndromes can involve different neuropathology, which highlights the diverse maintenance roles that are required for genome stability in the nervous system. Understanding how DNA damage signaling pathways promote neural development and preserve homeostasis is essential for understanding fundamental brain function.
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Affiliation(s)
- Peter J. McKinnon
- Department of Genetics, St Jude Children’s Research Hospital, Memphis TN, USA
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48
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Koshimizu E, Miyatake S, Okamoto N, Nakashima M, Tsurusaki Y, Miyake N, Saitsu H, Matsumoto N. Performance comparison of bench-top next generation sequencers using microdroplet PCR-based enrichment for targeted sequencing in patients with autism spectrum disorder. PLoS One 2013; 8:e74167. [PMID: 24066114 PMCID: PMC3774667 DOI: 10.1371/journal.pone.0074167] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Accepted: 07/29/2013] [Indexed: 11/29/2022] Open
Abstract
Next-generation sequencing (NGS) combined with enrichment of target genes enables highly efficient and low-cost sequencing of multiple genes for genetic diseases. The aim of this study was to validate the accuracy and sensitivity of our method for comprehensive mutation detection in autism spectrum disorder (ASD). We assessed the performance of the bench-top Ion Torrent PGM and Illumina MiSeq platforms as optimized solutions for mutation detection, using microdroplet PCR-based enrichment of 62 ASD associated genes. Ten patients with known mutations were sequenced using NGS to validate the sensitivity of our method. The overall read quality was better with MiSeq, largely because of the increased indel-related error associated with PGM. The sensitivity of SNV detection was similar between the two platforms, suggesting they are both suitable for SNV detection in the human genome. Next, we used these methods to analyze 28 patients with ASD, and identified 22 novel variants in genes associated with ASD, with one mutation detected by MiSeq only. Thus, our results support the combination of target gene enrichment and NGS as a valuable molecular method for investigating rare variants in ASD.
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Affiliation(s)
- Eriko Koshimizu
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Satoko Miyatake
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Nobuhiko Okamoto
- Department of Medical Genetics, Osaka Medical Center and Research Institute for Maternal and Child Health, Osaka, Japan
| | - Mitsuko Nakashima
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Yoshinori Tsurusaki
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Noriko Miyake
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Hirotomo Saitsu
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Naomichi Matsumoto
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
- * E-mail:
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Reynolds JJ, Stewart GS. Reply: A single strand that links multiple neuropathologies in human disease. Brain 2013; 137:e267. [DOI: 10.1093/brain/awt198] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Abstract
A number of DNA repair disorders are known to cause neurological problems. These disorders can be broadly characterised into early developmental, mid-to-late developmental or progressive. The exact developmental processes that are affected can influence disease pathology, with symptoms ranging from early embryonic lethality to late-onset ataxia. The category these diseases belong to depends on the frequency of lesions arising in the brain, the role of the defective repair pathway, and the nature of the mutation within the patient. Using observations from patients and transgenic mice, we discuss the importance of double strand break repair during neuroprogenitor proliferation and brain development and the repair of single stranded lesions in neuronal function and maintenance.
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Affiliation(s)
- Stuart L Rulten
- Genome Damage and Stability Centre, Science Park Road, Falmer, Brighton BN1 9RQ, UK.
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