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Wald J, Marlovits TC. Holliday junction branch migration driven by AAA+ ATPase motors. Curr Opin Struct Biol 2023; 82:102650. [PMID: 37604043 DOI: 10.1016/j.sbi.2023.102650] [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: 03/20/2023] [Revised: 06/09/2023] [Accepted: 06/11/2023] [Indexed: 08/23/2023]
Abstract
Holliday junctions are key intermediate DNA structures during genetic recombination. One of the first Holliday junction-processing protein complexes to be discovered was the well conserved RuvAB branch migration complex present in bacteria that mediates an ATP-dependent movement of the Holliday junction (branch migration). Although the RuvAB complex served as a paradigm for the processing of the Holliday junction, due to technical limitations the detailed structure and underlying mechanism of the RuvAB branch migration complex has until now remained unclear. Recently, structures of a reconstituted RuvAB complex actively-processing a Holliday junction were resolved using time-resolved cryo-electron microscopy. These structures showed distinct conformational states at different stages of the migration process. These structures made it possible to propose an integrated model for RuvAB Holliday junction branch migration. Furthermore, they revealed unexpected insights into the highly coordinated and regulated mechanisms of the nucleotide cycle powering substrate translocation in the hexameric AAA+ RuvB ATPase. Here, we review these latest advances and describe areas for future research.
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Affiliation(s)
- Jiri Wald
- Centre for Structural Systems Biology, Notkestraße 85, 22607 Hamburg, Germany; Institute of Structural and Systems Biology, University Medical Center Hamburg-Eppendorf, Notkestraße 85, 22607 Hamburg, Germany; Deutsches Elektronen Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
| | - Thomas C Marlovits
- Centre for Structural Systems Biology, Notkestraße 85, 22607 Hamburg, Germany; Institute of Structural and Systems Biology, University Medical Center Hamburg-Eppendorf, Notkestraße 85, 22607 Hamburg, Germany; Deutsches Elektronen Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany.
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2
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Cho C, Lee D, Jeong D, Kim S, Kim MK, Srinivasan S. Characterization of radiation-resistance mechanism in Spirosoma montaniterrae DY10 T in terms of transcriptional regulatory system. Sci Rep 2023; 13:4739. [PMID: 36959250 PMCID: PMC10036542 DOI: 10.1038/s41598-023-31509-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Accepted: 03/13/2023] [Indexed: 03/25/2023] Open
Abstract
To respond to the external environmental changes for survival, bacteria regulates expression of a number of genes including transcription factors (TFs). To characterize complex biological phenomena, a biological system-level approach is necessary. Here we utilized six computational biology methods to infer regulatory network and to characterize underlying biologically mechanisms relevant to radiation-resistance. In particular, we inferred gene regulatory network (GRN) and operons of radiation-resistance bacterium Spirosoma montaniterrae DY10[Formula: see text] and identified the major regulators for radiation-resistance. Our results showed that DNA repair and reactive oxygen species (ROS) scavenging mechanisms are key processes and Crp/Fnr family transcriptional regulator works as a master regulatory TF in early response to radiation.
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Affiliation(s)
- Changyun Cho
- Interdisciplinary Program in Bioinformatics, Seoul National University, Seoul, 08826, Republic of Korea
| | - Dohoon Lee
- Bioinformatics Institute, Seoul National University, Seoul, 08826, Republic of Korea
- BK21 FOUR Intelligence Computing, Seoul National University, Seoul, 08826, Republic of Korea
| | - Dabin Jeong
- Interdisciplinary Program in Bioinformatics, Seoul National University, Seoul, 08826, Republic of Korea
| | - Sun Kim
- Interdisciplinary Program in Bioinformatics, Seoul National University, Seoul, 08826, Republic of Korea
- Department of Computer Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Myung Kyum Kim
- Department of Bio & Environmental Technology, College of Natural Science, Seoul Women's University, Seoul, 01797, Republic of Korea.
| | - Sathiyaraj Srinivasan
- Department of Bio & Environmental Technology, College of Natural Science, Seoul Women's University, Seoul, 01797, Republic of Korea.
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Khurana J, Shrivastava A, Singh A, Gupta A. Exploring potential of Plasmodium RUVBL proteins as anti-malarial drug target. J Biomol Struct Dyn 2023; 41:736-752. [PMID: 34877896 DOI: 10.1080/07391102.2021.2011418] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Although malaria related cases and deaths have consistently declined over time, growing resistance to existing anti-malarial drugs in Plasmodium remains a matter of extreme concern. Since we rely so heavily on use of chemotherapy for malaria treatment and knowing that all the available anti-malarial drug will become virtually useless in the near future, we have to increase our understanding of basic biology of the parasite as well as characterize new molecular targets that can be exploited for anti-malarial therapy. In the present study, PfRUVBLs (AAA family member proteins) were evaluated for their potential as novel anti-malarial drug target candidates, using computational approaches. Virtual High-throughput screening of various pharmacophore libraries obtained from three different databases (which included, Asinex, ZINC15 & PubChem) followed by extra precision docking, resulted in identification of relevant hit compounds that showed binding affinity with the active region of PfRUVBL1 protein. Based on molecular docking data, MD simulations, and protein-ligand interaction studies, combined with toxicity assessment & ADME profiling data, at least three best hits were eventually identified that could be novel potent inhibitors of PfRUVBL1 protein and can be further tested for anti-malarial activity using in vitro protocols. Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Juhi Khurana
- Epigenetics and Human Disease Laboratory, Department of Life Sciences, Shiv Nadar University, Greater Noida, India
| | - Ashish Shrivastava
- Bioinformatics Lab, Department of Life Sciences, Shiv Nadar University, Greater Noida, India
| | - Ashutosh Singh
- Bioinformatics Lab, Department of Life Sciences, Shiv Nadar University, Greater Noida, India
| | - Ashish Gupta
- Epigenetics and Human Disease Laboratory, Department of Life Sciences, Shiv Nadar University, Greater Noida, India
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Iizuka R, Yamazaki H, Uemura S. Zero-mode waveguides and nanopore-based sequencing technologies accelerate single-molecule studies. Biophys Physicobiol 2022; 19:e190032. [DOI: 10.2142/biophysico.bppb-v19.0032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 08/26/2022] [Indexed: 12/01/2022] Open
Affiliation(s)
- Ryo Iizuka
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo
| | - Hirohito Yamazaki
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo
| | - Sotaro Uemura
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo
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Bianco PR, Lu Y. Single-molecule insight into stalled replication fork rescue in Escherichia coli. Nucleic Acids Res 2021; 49:4220-4238. [PMID: 33744948 PMCID: PMC8096234 DOI: 10.1093/nar/gkab142] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 02/15/2021] [Accepted: 02/22/2021] [Indexed: 01/05/2023] Open
Abstract
DNA replication forks stall at least once per cell cycle in Escherichia coli. DNA replication must be restarted if the cell is to survive. Restart is a multi-step process requiring the sequential action of several proteins whose actions are dictated by the nature of the impediment to fork progression. When fork progress is impeded, the sequential actions of SSB, RecG and the RuvABC complex are required for rescue. In contrast, when a template discontinuity results in the forked DNA breaking apart, the actions of the RecBCD pathway enzymes are required to resurrect the fork so that replication can resume. In this review, we focus primarily on the significant insight gained from single-molecule studies of individual proteins, protein complexes, and also, partially reconstituted regression and RecBCD pathways. This insight is related to the bulk-phase biochemical data to provide a comprehensive review of each protein or protein complex as it relates to stalled DNA replication fork rescue.
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Affiliation(s)
- Piero R Bianco
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68198-6025, USA
| | - Yue Lu
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68198-6025, USA
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Direct unfolding of RuvA-HJ complex at the single-molecule level. Biophys J 2021; 120:1894-1902. [PMID: 33737156 DOI: 10.1016/j.bpj.2021.03.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 03/03/2021] [Accepted: 03/09/2021] [Indexed: 11/20/2022] Open
Abstract
The repair of double-stranded DNA breaks via homologous recombination involves a four-way cross-strand intermediate known as Holliday junction (HJ), which is recognized, processed, and resolved by a specific set of proteins. RuvA, a prokaryotic HJ-binding protein, is known to stabilize the square-planar conformation of the HJ, which is otherwise a short-lived intermediate. Despite much progress being made regarding the molecular mechanism of RuvA-HJ interactions, the mechanochemical aspect of this protein-HJ complex is yet to be investigated. Here, we employed an optical-tweezers-based, single-molecule manipulation assay to detect the formation of RuvA-HJ complex and determined its mechanical and thermodynamic properties in a manner that would be impossible with traditional ensemble techniques. We found that the binding of RuvA increases the unfolding force (Funfold) of the HJ by ∼2-fold. Compared with the ΔGunfold of the HJ alone (54 ± 13 kcal/mol), the increased free energy of the RuvA-HJ complex (101 ± 20 kcal/mol) demonstrates that the RuvA protein stabilizes HJs. Interestingly, the protein remains bound to the mechanically melted HJ, facilitating its refolding at an unusually high force when the stretched DNA molecule is relaxed. These results suggest that the RuvA protein not only stabilizes the HJs but also induces refolding of the HJs. The single-molecule platform that we employed here for studying the RuvA-HJ interaction is broadly applicable to study other HJ-binding proteins involved in the critical DNA repair process.
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Yazaki J, Kawashima Y, Ogawa T, Kobayashi A, Okoshi M, Watanabe T, Yoshida S, Kii I, Egami S, Amagai M, Hosoya T, Shiroguchi K, Ohara O. HaloTag-based conjugation of proteins to barcoding-oligonucleotides. Nucleic Acids Res 2020; 48:e8. [PMID: 31752022 PMCID: PMC6954424 DOI: 10.1093/nar/gkz1086] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 10/29/2019] [Accepted: 11/18/2019] [Indexed: 11/12/2022] Open
Abstract
Highly sensitive protein quantification enables the detection of a small number of protein molecules that serve as markers/triggers for various biological phenomena, such as cancer. Here, we describe the development of a highly sensitive protein quantification system called HaloTag protein barcoding. The method involves covalent linking of a target protein to a unique molecule counting oligonucleotide at a 1:1 conjugation ratio based on an azido-cycloalkyne click reaction. The sensitivity of the HaloTag-based barcoding was remarkably higher than that of a conventional luciferase assay. The HaloTag system was successfully validated by analyzing a set of protein-protein interactions, with the identification rate of 44% protein interactions between positive reference pairs reported in the literature. Desmoglein 3, the target antigen of pemphigus vulgaris, an IgG-mediated autoimmune blistering disease, was used in a HaloTag protein barcode assay to detect the anti-DSG3 antibody. The dynamic range of the assay was over 104-times wider than that of a conventional enzyme-linked immunosorbent assay (ELISA). The technology was used to detect anti-DSG3 antibody in patient samples with much higher sensitivity compared to conventional ELISA. Our detection system, with its superior sensitivity, enables earlier detection of diseases possibly allowing the initiation of care/treatment at an early disease stage.
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Affiliation(s)
- Junshi Yazaki
- Laboratory for Integrative Genomics, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama City 230-0045, Japan
| | - Yusuke Kawashima
- Laboratory for Integrative Genomics, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama City 230-0045, Japan
| | - Taisaku Ogawa
- Laboratory for Prediction of Cell Systems Dynamics, RIKEN Center for Biosystems Dynamics Research (BDR), Osaka 565-0874, Japan
| | - Atsuo Kobayashi
- Laboratory for Integrative Genomics, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama City 230-0045, Japan
| | - Mayu Okoshi
- Laboratory for Integrative Genomics, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama City 230-0045, Japan
| | - Takashi Watanabe
- Laboratory for Integrative Genomics, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama City 230-0045, Japan
| | - Suguru Yoshida
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo 101-0062, Japan
| | - Isao Kii
- Common Facilities Unit, Compass to Healthy Life Research Complex Program, RIKEN Cluster for Science, Technology and Innovation Hub, Kobe 650-0047, Japan
| | - Shohei Egami
- Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama 230-0045, Japan.,Department of Dermatology, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Masayuki Amagai
- Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama 230-0045, Japan.,Department of Dermatology, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Takamitsu Hosoya
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo 101-0062, Japan.,Laboratory for Chemical Biology, RIKEN Center for Biosystems Dynamics Research (BDR), Kobe 650-0047, Japan
| | - Katsuyuki Shiroguchi
- Laboratory for Prediction of Cell Systems Dynamics, RIKEN Center for Biosystems Dynamics Research (BDR), Osaka 565-0874, Japan.,Laboratory for Immunogenetics, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama 230-0045, Japan
| | - Osamu Ohara
- Laboratory for Integrative Genomics, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama City 230-0045, Japan
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Homologous Recombination under the Single-Molecule Fluorescence Microscope. Int J Mol Sci 2019; 20:ijms20236102. [PMID: 31816946 PMCID: PMC6929127 DOI: 10.3390/ijms20236102] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 11/26/2019] [Accepted: 11/30/2019] [Indexed: 11/16/2022] Open
Abstract
Homologous recombination (HR) is a complex biological process and is central to meiosis and for repair of DNA double-strand breaks. Although the HR process has been the subject of intensive study for more than three decades, the complex protein–protein and protein–DNA interactions during HR present a significant challenge for determining the molecular mechanism(s) of the process. This knowledge gap is largely because of the dynamic interactions between HR proteins and DNA which is difficult to capture by routine biochemical or structural biology methods. In recent years, single-molecule fluorescence microscopy has been a popular method in the field of HR to visualize these complex and dynamic interactions at high spatiotemporal resolution, revealing mechanistic insights of the process. In this review, we describe recent efforts that employ single-molecule fluorescence microscopy to investigate protein–protein and protein–DNA interactions operating on three key DNA-substrates: single-stranded DNA (ssDNA), double-stranded DNA (dsDNA), and four-way DNA called Holliday junction (HJ). We also outline the technological advances and several key insights revealed by these studies in terms of protein assembly on these DNA substrates and highlight the foreseeable promise of single-molecule fluorescence microscopy in advancing our understanding of homologous recombination.
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Nanoaperture fabrication via colloidal lithography for single molecule fluorescence analysis. PLoS One 2019; 14:e0222964. [PMID: 31600217 PMCID: PMC6786550 DOI: 10.1371/journal.pone.0222964] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 09/10/2019] [Indexed: 11/30/2022] Open
Abstract
In single molecule fluorescence studies, background emission from labeled substrates often restricts their concentrations to non-physiological nanomolar values. One approach to address this challenge is the use of zero-mode waveguides (ZMWs), nanoscale holes in a thin metal film that physically and optically confine the observation volume allowing much higher concentrations of fluorescent substrates. Standard fabrication of ZMWs utilizes slow and costly E-beam nano-lithography. Herein, ZMWs are made using a self-assembled mask of polystyrene microspheres, enabling fabrication of thousands of ZMWs in parallel without sophisticated equipment. Polystyrene 1 μm dia. microbeads self-assemble on a glass slide into a hexagonal array, forming a mask for the deposition of metallic posts in the inter-bead interstices. The width of those interstices (and subsequent posts) is adjusted within 100–300 nm by partially fusing the beads at the polystyrene glass transition temperature. The beads are dissolved in toluene, aluminum or gold cladding is deposited around the posts, and those are dissolved, leaving behind an array ZMWs. Parameter optimization and the performance of the ZMWs are presented. By using colloidal self-assembly, typical laboratories can make use of sub-wavelength ZMW technology avoiding the availability and expense of sophisticated clean-room environments and equipment.
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Yokota H. Fluorescence microscopy for visualizing single-molecule protein dynamics. Biochim Biophys Acta Gen Subj 2019; 1864:129362. [PMID: 31078674 DOI: 10.1016/j.bbagen.2019.05.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Revised: 04/26/2019] [Accepted: 05/07/2019] [Indexed: 01/06/2023]
Abstract
BACKGROUND Single-molecule fluorescence imaging (smFI) has evolved into a valuable method used in biophysical and biochemical studies as it can observe the real-time behavior of individual protein molecules, enabling understanding of their detailed dynamic features. smFI is also closely related to other state-of-the-art microscopic methods, optics, and nanomaterials in that smFI and these technologies have developed synergistically. SCOPE OF REVIEW This paper provides an overview of the recently developed single-molecule fluorescence microscopy methods, focusing on critical techniques employed in higher-precision measurements in vitro and fluorescent nanodiamond, an emerging promising fluorophore that will improve single-molecule fluorescence microscopy. MAJOR CONCLUSIONS smFI will continue to improve regarding the photostability of fluorophores and will develop via combination with other techniques based on nanofabrication, single-molecule manipulation, and so on. GENERAL SIGNIFICANCE Quantitative, high-resolution single-molecule studies will help establish an understanding of protein dynamics and complex biomolecular systems.
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Affiliation(s)
- Hiroaki Yokota
- Biophotonics Laboratory, Graduate School for the Creation of New Photonics Industries, Kurematsu-cho, Nishi-ku, Hamamatsu, Shizuoka 431-1202, Japan.
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Muenter MM, Aiken A, Akanji JO, Baig S, Bellou S, Carlson A, Conway C, Cowell CM, DeLateur NA, Hester A, Joshi C, Kramer C, Leifer BS, Nash E, Qi MH, Travers M, Wong KC, Hu M, Gou N, Giese RW, Gu AZ, Beuning PJ. The response of Escherichia coli to the alkylating agents chloroacetaldehyde and styrene oxide. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2019; 840:1-10. [PMID: 30857727 DOI: 10.1016/j.mrgentox.2019.02.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Revised: 02/06/2019] [Accepted: 02/06/2019] [Indexed: 10/27/2022]
Abstract
DNA damage is ubiquitous and can arise from endogenous or exogenous sources. DNA-damaging alkylating agents are present in environmental toxicants as well as in cancer chemotherapy drugs and are a constant threat, which can lead to mutations or cell death. All organisms have multiple DNA repair and DNA damage tolerance pathways to resist the potentially negative effects of exposure to alkylating agents. In bacteria, many of the genes in these pathways are regulated as part of the SOS reponse or the adaptive response. In this work, we probed the cellular responses to the alkylating agents chloroacetaldehyde (CAA), which is a metabolite of 1,2-dichloroethane used to produce polyvinyl chloride, and styrene oxide (SO), a major metabolite of styrene used in the production of polystyrene and other polymers. Vinyl chloride and styrene are produced on an industrial scale of billions of kilograms annually and thus have a high potential for environmental exposure. To identify stress response genes in E. coli that are responsible for tolerance to the reactive metabolites CAA and SO, we used libraries of transcriptional reporters and gene deletion strains. In response to both alkylating agents, genes associated with several different stress pathways were upregulated, including protein, membrane, and oxidative stress, as well as DNA damage. E. coli strains lacking genes involved in base excision repair and nucleotide excision repair were sensitive to SO, whereas strains lacking recA and the SOS gene ybfE were sensitive to both alkylating agents tested. This work indicates the varied systems involved in cellular responses to alkylating agents, and highlights the specific DNA repair genes involved in the responses.
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Affiliation(s)
- Mark M Muenter
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, 02115 USA
| | - Ariel Aiken
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, 02115 USA
| | - Jadesola O Akanji
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, 02115 USA
| | - Samir Baig
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, 02115 USA
| | - Sirine Bellou
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, 02115 USA
| | - Alyssa Carlson
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, 02115 USA
| | - Charles Conway
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, 02115 USA
| | - Courtney M Cowell
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, 02115 USA
| | - Nicholas A DeLateur
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, 02115 USA
| | - Alexis Hester
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, 02115 USA
| | - Christopher Joshi
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, 02115 USA
| | - Caitlin Kramer
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, 02115 USA
| | - Becky S Leifer
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, 02115 USA
| | - Emma Nash
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, 02115 USA
| | - Macee H Qi
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, 02115 USA
| | - Meghan Travers
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, 02115 USA
| | - Kelly C Wong
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, 02115 USA
| | - Man Hu
- Department of Civil and Environmental Engineering, Northeastern University, Boston, MA, 02115 USA
| | - Na Gou
- Department of Civil and Environmental Engineering, Northeastern University, Boston, MA, 02115 USA; School of Civil and Environmental Engineering, Cornell University, Ithaca, NY, 14850, USA
| | - Roger W Giese
- Department of Pharmaceutical Sciences, Northeastern University, Boston, MA, 02115 USA
| | - April Z Gu
- Department of Civil and Environmental Engineering, Northeastern University, Boston, MA, 02115 USA; School of Civil and Environmental Engineering, Cornell University, Ithaca, NY, 14850, USA
| | - Penny J Beuning
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, 02115 USA.
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