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Rihon J, Mattelaer CA, Montalvão RW, Froeyen M, Pinheiro VB, Lescrinier E. Structural insights into the morpholino nucleic acid/RNA duplex using the new XNA builder Ducque in a molecular modeling pipeline. Nucleic Acids Res 2024; 52:2836-2847. [PMID: 38412249 PMCID: PMC11014352 DOI: 10.1093/nar/gkae135] [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: 09/22/2023] [Accepted: 02/19/2024] [Indexed: 02/29/2024] Open
Abstract
The field of synthetic nucleic acids with novel backbone structures [xenobiotic nucleic acids (XNAs)] has flourished due to the increased importance of XNA antisense oligonucleotides and aptamers in medicine, as well as the development of XNA processing enzymes and new XNA genetic materials. Molecular modeling on XNA structures can accelerate rational design in the field of XNAs as it contributes in understanding and predicting how changes in the sugar-phosphate backbone impact on the complementation properties of the nucleic acids. To support the development of novel XNA polymers, we present a first-in-class open-source program (Ducque) to build duplexes of nucleic acid analogs with customizable chemistry. A detailed procedure is described to extend the Ducque library with new user-defined XNA fragments using quantum mechanics (QM) and to generate QM-based force field parameters for molecular dynamics simulations within standard packages such as AMBER. The tool was used within a molecular modeling workflow to accurately reproduce a selection of experimental structures for nucleic acid duplexes with ribose-based as well as non-ribose-based nucleosides. Additionally, it was challenged to build duplexes of morpholino nucleic acids bound to complementary RNA sequences.
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Affiliation(s)
- Jérôme Rihon
- Laboratory of Medicinal Chemistry, Rega Institute for Medical Research, Herestraat 49, Box 1030, B-3000 Leuven, Belgium
| | - Charles-Alexandre Mattelaer
- Laboratory of Medicinal Chemistry, Rega Institute for Medical Research, Herestraat 49, Box 1030, B-3000 Leuven, Belgium
- Quantum Chemistry and Physical Chemistry, Celestijnenlaan 200f, Box 2404, B-3001, Leuven, Belgium
| | - Rinaldo Wander Montalvão
- Laboratory of Medicinal Chemistry, Rega Institute for Medical Research, Herestraat 49, Box 1030, B-3000 Leuven, Belgium
- Gain Therapeutics sucursal en España, Barcelona Science Park, Baldiri Reixac 4-10, 08028 Barcelona, Spain
| | - Mathy Froeyen
- Laboratory of Medicinal Chemistry, Rega Institute for Medical Research, Herestraat 49, Box 1030, B-3000 Leuven, Belgium
| | - Vitor Bernardes Pinheiro
- Laboratory of Medicinal Chemistry, Rega Institute for Medical Research, Herestraat 49, Box 1030, B-3000 Leuven, Belgium
| | - Eveline Lescrinier
- Laboratory of Medicinal Chemistry, Rega Institute for Medical Research, Herestraat 49, Box 1030, B-3000 Leuven, Belgium
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2
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Amin SM, Islam T, Price NE, Wallace A, Guo X, Gomina A, Heidari M, Johnson KM, Lewis CD, Yang Z, Gates KS. Effects of Local Sequence, Reaction Conditions, and Various Additives on the Formation and Stability of Interstrand Cross-Links Derived from the Reaction of an Abasic Site with an Adenine Residue in Duplex DNA. ACS OMEGA 2022; 7:36888-36901. [PMID: 36278095 PMCID: PMC9583646 DOI: 10.1021/acsomega.2c05736] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Accepted: 09/28/2022] [Indexed: 06/16/2023]
Abstract
The experiments described here examined the effects of reaction conditions, various additives, and local sequence on the formation and stability interstrand cross-links (ICLs) derived from the reaction of an apurinic/apyrimidinic (AP) site with the exocyclic amino group of an adenine residue on the opposing strand in duplex DNA. Cross-link formation was observed in a range of different buffers, with faster formation rates observed at pH 5. Inclusion of the base excision repair enzyme alkyladenine DNA glycosylase (hAAG) which binds tightly to AP-containing duplexes decreased, but did not completely prevent, formation of the dA-AP ICL. Formation of the dA-AP ICL was not altered by the presence of the biological metal ion Mg2+ or the biological thiol, glutathione. Several organocatalysts of imine formation did not enhance the rate of dA-AP ICL formation. Duplex length did not have a large effect on dA-AP yield, so long as the melting temperature of the duplex was not significantly below the reaction temperature (the duplex must remain hybridized for efficient ICL formation). Formation of the dA-AP ICL was examined in over 40 different sequences that varied the neighboring and opposing bases at the cross-linking site. The results indicate that ICL formation can occur in a wide variety of sequence contexts under physiological conditions. Formation of the dA-AP ICL was strongly inhibited by the aldehyde-trapping agents methoxyamine and hydralazine, by NaBH3CN, by the intercalator ethidium bromide, and by the minor groove-binding agent netropsin. ICL formation was inhibited to some extent in bicarbonate and Tris buffers. The dA-AP ICL showed substantial inherent stability under a variety of conditions and was not a substrate for AP-processing enzymes APE1 or Endo IV. Finally, we characterized cross-link formation in a small (11 bp) stem-loop (hairpin) structure and in DNA-RNA hybrid duplexes.
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Affiliation(s)
- Saosan
Binth Md. Amin
- Department
of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Tanhaul Islam
- Department
of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Nathan E. Price
- Department
of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Amanda Wallace
- Department
of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Xu Guo
- Department
of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Anuoluwapo Gomina
- Department
of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Marjan Heidari
- Department
of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Kevin M. Johnson
- Department
of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Calvin D. Lewis
- Department
of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Zhiyu Yang
- Department
of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Kent S. Gates
- Department
of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
- Department
of Biochemistry, University of Missouri, Columbia, Missouri 65211, United States
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3
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Duchemin N, Aubert S, de Souza JV, Bethge L, Vonhoff S, Bronowska AK, Smietana M, Arseniyadis S. New Benchmark in DNA-Based Asymmetric Catalysis: Prevalence of Modified DNA/RNA Hybrid Systems. JACS AU 2022; 2:1910-1917. [PMID: 36032523 PMCID: PMC9400053 DOI: 10.1021/jacsau.2c00271] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 06/27/2022] [Accepted: 07/22/2022] [Indexed: 06/15/2023]
Abstract
By harnessing the chirality of the DNA double helix, chemists have been able to obtain new, reliable, selective, and environmentally friendly biohybrid catalytic systems with tailor-made functions. Nonetheless, despite all the advances made throughout the years in the field of DNA-based asymmetric catalysis, many challenges still remain to be faced, in particular when it comes to designing a "universal" catalyst with broad reactivity and unprecedented selectivity. Rational design and rounds of selection have allowed us to approach this goal. We report here the development of a DNA/RNA hybrid catalytic system featuring a covalently attached bipyridine ligand, which exhibits unmatched levels of selectivity throughout the current DNA toolbox and opens new avenues in asymmetric catalysis.
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Affiliation(s)
- Nicolas Duchemin
- Queen
Mary University of London, Department of Chemistry, Mile End Road, London E1 4NS, United
Kingdom
- NOXXON
Pharma AG, Max-Dohrn-Strasse 8-10, Berlin 10589, Germany
| | - Sidonie Aubert
- Queen
Mary University of London, Department of Chemistry, Mile End Road, London E1 4NS, United
Kingdom
| | - João V. de Souza
- Chemistry−School
of Natural and Environmental Sciences, Newcastle
University, Newcastle NE1 7RU, United Kingdom
| | - Lucas Bethge
- NOXXON
Pharma AG, Max-Dohrn-Strasse 8-10, Berlin 10589, Germany
| | - Stefan Vonhoff
- NOXXON
Pharma AG, Max-Dohrn-Strasse 8-10, Berlin 10589, Germany
| | - Agnieszka K. Bronowska
- Chemistry−School
of Natural and Environmental Sciences, Newcastle
University, Newcastle NE1 7RU, United Kingdom
| | - Michael Smietana
- Institut
des Biomolécules Max Mousseron, Université
de Montpellier, CNRS, ENSCM, 1919 Route de Mende, Montpellier 34095, France
| | - Stellios Arseniyadis
- Queen
Mary University of London, Department of Chemistry, Mile End Road, London E1 4NS, United
Kingdom
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4
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Guo P, Han D. Targeting Pathogenic DNA and RNA Repeats: A Conceptual Therapeutic Way for Repeat Expansion Diseases. Chemistry 2022; 28:e202201749. [PMID: 35727679 DOI: 10.1002/chem.202201749] [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: 06/07/2022] [Indexed: 11/06/2022]
Abstract
Expansions of short tandem repeats (STRs) in the human genome cause nearly 50 neurodegenerative diseases, which are mostly inheritable, nonpreventable and incurable, posing as a huge threat to human health. Non-B DNAs formed by STRs are thought to be structural intermediates that can cause repeat expansions. The subsequent transcripts harboring expanded RNA repeats can further induce cellular toxicity through forming specific structures. Direct targeting of these pathogenic DNA and RNA repeats has emerged as a new potential therapeutic strategy to cure repeat expansion diseases. In this conceptual review, we first introduce the roles of DNA and RNA structures in the genetic instabilities and pathomechanisms of repeat expansion diseases, then describe structural features of DNA and RNA repeats with a focus on the tertiary structures determined by X-ray crystallography and solution nuclear magnetic resonance spectroscopy, and finally discuss recent progress and perspectives of developing chemical tools that target pathogenic DNA and RNA repeats for curing repeat expansion diseases.
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Affiliation(s)
- Pei Guo
- The Cancer Hospital of the University of Chinese Academy of Sciences, Zhejiang Cancer Hospital), Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang, 310022, P. R. China
| | - Da Han
- The Cancer Hospital of the University of Chinese Academy of Sciences, Zhejiang Cancer Hospital), Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang, 310022, P. R. China.,Institute of Molecular Medicine, Shanghai Key Laboratory for Nucleic Acid Chemistry and Nanomedicine, State Key Laboratory of Oncogenes and Related Genes, Renji Hospital, School of Medicine Shanghai Jiao Tong University, Shanghai, 200127, P. R. China
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5
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Bou-Nader C, Bothra A, Garboczi DN, Leppla SH, Zhang J. Structural basis of R-loop recognition by the S9.6 monoclonal antibody. Nat Commun 2022; 13:1641. [PMID: 35347133 PMCID: PMC8960830 DOI: 10.1038/s41467-022-29187-7] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 03/02/2022] [Indexed: 12/31/2022] Open
Abstract
R-loops are ubiquitous, dynamic nucleic-acid structures that play fundamental roles in DNA replication and repair, chromatin and transcription regulation, as well as telomere maintenance. The DNA-RNA hybrid–specific S9.6 monoclonal antibody is widely used to map R-loops. Here, we report crystal structures of a S9.6 antigen-binding fragment (Fab) free and bound to a 13-bp hybrid duplex. We demonstrate that S9.6 exhibits robust selectivity in binding hybrids over double-stranded (ds) RNA and in categorically rejecting dsDNA. S9.6 asymmetrically recognizes a compact epitope of two consecutive RNA nucleotides via their 2′-hydroxyl groups and six consecutive DNA nucleotides via their backbone phosphate and deoxyribose groups. Recognition is mediated principally by aromatic and basic residues of the S9.6 heavy chain, which closely track the curvature of the hybrid minor groove. These findings reveal the molecular basis for S9.6 recognition of R-loops, detail its binding specificity, identify a new hybrid-recognition strategy, and provide a framework for S9.6 protein engineering. The S9.6 monoclonal antibody is widely used to map R-loops genome wide. Here, Bou-Nader et al., define the nucleic acid-binding specificity of S9.6 and report its crystal structures free and bound to a hybrid, which reveal the asymmetric recognition of the RNA and DNA strands and its A-form conformation.
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Affiliation(s)
- Charles Bou-Nader
- Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD, 20892, USA
| | - Ankur Bothra
- Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD, 20892, USA
| | - David N Garboczi
- Structural Biology Section, Research Technologies Branch, National Institute of Allergy and Infectious Diseases, Bethesda, MD, 20892, USA
| | - Stephen H Leppla
- Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD, 20892, USA.
| | - Jinwei Zhang
- Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD, 20892, USA.
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6
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DNA binding by the antimalarial compound artemisinin. Sci Rep 2022; 12:133. [PMID: 34997002 PMCID: PMC8741894 DOI: 10.1038/s41598-021-03958-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 12/13/2021] [Indexed: 11/23/2022] Open
Abstract
Artemisinin (ART) is a vital medicinal compound that is used alone or as part of a combination therapy against malaria. ART is thought to function by attaching to heme covalently and alkylating a range of proteins. Using a combination of biophysical methods, we demonstrate that ART is bound by three-way junction and duplex containing DNA molecules. Binding of ART by DNA is first shown for the cocaine-binding DNA aptamer and extensively studied using this DNA molecule. Isothermal titration calorimetry methods show that the binding of ART is both entropically and enthalpically driven at physiological NaCl concentration. Native mass spectrometry methods confirm DNA binding and show that a non-covalent complex is formed. Nuclear magnetic resonance spectroscopy shows that ART binds at the three-way junction of the cocaine-binding aptamer, and that binding results in the folding of the structure-switching variant of this aptamer. This structure-switching ability was exploited using the photochrome aptamer switch assay to demonstrate that ART can be detected using this biosensing assay. This study is the first to demonstrate the DNA binding ability of ART and should lay the foundation for further work to study implications of DNA binding for the antimalarial activity of ART.
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7
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Masaki Y, Tabira A, Hattori S, Wakatsuki S, Seio K. Insertion of a methylene group into the backbone of an antisense oligonucleotide reveals the importance of deoxyribose recognition by RNase H. Org Biomol Chem 2022; 20:8917-8924. [DOI: 10.1039/d2ob01667b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Methylene-inserted oligonucleotides showed an inserted-position-dependent inhibitory effect on cleavage reaction which suggested the importance of deoxyribose recognition.
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Affiliation(s)
- Yoshiaki Masaki
- Department of Life Science and Technology, Tokyo Institute of Technology, 4259-J2-16 Nagatsuta, Midori, Yokohama, Kanagawa, 226-8501, Japan
- PRESTO, JST, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan
| | - Ayano Tabira
- Department of Life Science and Technology, Tokyo Institute of Technology, 4259-J2-16 Nagatsuta, Midori, Yokohama, Kanagawa, 226-8501, Japan
| | - Shihori Hattori
- Department of Life Science and Technology, Tokyo Institute of Technology, 4259-J2-16 Nagatsuta, Midori, Yokohama, Kanagawa, 226-8501, Japan
| | - Shunsuke Wakatsuki
- Department of Life Science and Technology, Tokyo Institute of Technology, 4259-J2-16 Nagatsuta, Midori, Yokohama, Kanagawa, 226-8501, Japan
| | - Kohji Seio
- Department of Life Science and Technology, Tokyo Institute of Technology, 4259-J2-16 Nagatsuta, Midori, Yokohama, Kanagawa, 226-8501, Japan
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8
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Cheung KM, Abendroth JM, Nakatsuka N, Zhu B, Yang Y, Andrews AM, Weiss PS. Detecting DNA and RNA and Differentiating Single-Nucleotide Variations via Field-Effect Transistors. NANO LETTERS 2020; 20:5982-5990. [PMID: 32706969 PMCID: PMC7439785 DOI: 10.1021/acs.nanolett.0c01971] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
We detect short oligonucleotides and distinguish between sequences that differ by a single base, using label-free, electronic field-effect transistors (FETs). Our sensing platform utilizes ultrathin-film indium oxide FETs chemically functionalized with single-stranded DNA (ssDNA). The ssDNA-functionalized semiconducting channels in FETs detect fully complementary DNA sequences and differentiate these sequences from those having different types and locations of single base-pair mismatches. Changes in charge associated with surface-bound ssDNA vs double-stranded DNA (dsDNA) alter FET channel conductance to enable detection due to differences in DNA duplex stability. We illustrate the capability of ssDNA-FETs to detect complementary RNA sequences and to distinguish from RNA sequences with single nucleotide variations. The development and implementation of electronic biosensors that rapidly and sensitively detect and differentiate oligonucleotides present new opportunities in the fields of disease diagnostics and precision medicine.
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Affiliation(s)
- Kevin M Cheung
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - John M Abendroth
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Nako Nakatsuka
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Bowen Zhu
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Yang Yang
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Anne M Andrews
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Psychiatry and Biobehavioral Sciences, Semel Institute for Neuroscience & Human Behavior, and Hatos Center for Neuropharmacology, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Paul S Weiss
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, California 90095, United States
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9
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Yoshioka K, Kurita R. N6-Methylation Assessment in Escherichia coli 23S rRNA Utilizing a Bulge Loop in an RNA-DNA Hybrid. Anal Chem 2018; 90:7578-7582. [PMID: 29846061 DOI: 10.1021/acs.analchem.8b01223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
We propose a sequence-selective assay of N6-methyl-adenosine (m6A) in RNA without PCR or reverse transcription, by employing a hybridization assay with a DNA probe designed to form a bulge loop at the position of a target modified nucleotide. The m6A in the bulge in the RNA-DNA hybrid was assumed to be sufficiently mobile to be selectively recognized by an anti-m6A antibody with a high affinity. By employing a surface-plasmon-resonance measurement or using a microtiter-plate immunoassay method, a specific m6A in the Escherichia coli 23S rRNA sequence could be detected at the nanomolar level when synthesized and purified oligo-RNA fragments were used for measurement. We have successfully achieved the first selective detection of m6A2030 specifically in 23S rRNA from real samples of E. coli total RNA by using our immunochemical approach.
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Affiliation(s)
- Kyoko Yoshioka
- National Institute of Advanced Industrial Science and Technology (AIST) and DAILAB , Tsukuba Central 6, 1-1-1 Higashi , Tsukuba , Ibaraki 305-8566 , Japan
| | - Ryoji Kurita
- National Institute of Advanced Industrial Science and Technology (AIST) and DAILAB , Tsukuba Central 6, 1-1-1 Higashi , Tsukuba , Ibaraki 305-8566 , Japan
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10
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Zheng Y, Lorenzo C, Beal PA. DNA editing in DNA/RNA hybrids by adenosine deaminases that act on RNA. Nucleic Acids Res 2017; 45:3369-3377. [PMID: 28132026 PMCID: PMC5389660 DOI: 10.1093/nar/gkx050] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Accepted: 01/25/2017] [Indexed: 01/08/2023] Open
Abstract
Adenosine deaminases that act on RNA (ADARs) carry out adenosine (A) to inosine (I) editing reactions with a known requirement for duplex RNA. Here, we show that ADARs also react with DNA/RNA hybrid duplexes. Hybrid substrates are deaminated efficiently by ADAR deaminase domains at dA-C mismatches and with E to Q mutations in the base flipping loop of the enzyme. For a long, perfectly matched hybrid, deamination is more efficient with full length ADAR2 than its isolated deaminase domain. Guide RNA strands for directed DNA editing by ADAR were used to target six different 2΄-deoxyadenosines in the M13 bacteriophage ssDNA genome. DNA editing efficiencies varied depending on the sequence context of the editing site consistent with known sequence preferences for ADARs. These observations suggest the reaction within DNA/RNA hybrids may be a natural function of human ADARs. In addition, this work sets the stage for development of a new class of genome editing tools based on directed deamination of 2΄-deoxyadenosines in DNA/RNA hybrids.
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Affiliation(s)
- Yuxuan Zheng
- Department of Chemistry, University of California, Davis, One Shields Ave, Davis, CA 95616, USA
| | - Claire Lorenzo
- Department of Chemistry, University of California, Davis, One Shields Ave, Davis, CA 95616, USA
| | - Peter A Beal
- Department of Chemistry, University of California, Davis, One Shields Ave, Davis, CA 95616, USA
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