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Storoniak P, Rak J, Wang H, Ko YJ, Bowen KH. Electrophilic Properties of 2'-Deoxyadenosine···Thymine Dimer: Photoelectron Spectroscopy and DFT Studies. J Phys Chem A 2021; 125:6591-6599. [PMID: 34310156 PMCID: PMC8389985 DOI: 10.1021/acs.jpca.1c03803] [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] [Indexed: 11/30/2022]
Abstract
The anion radical of the 2'-deoxyadenosine···thymine (dAT•-) pair has been investigated experimentally and theoretically in the gas phase. By employing negative-ion photoelectron spectroscopy (PES), we have registered a spectrum typical for the valence-bound anion, featuring a broad peak at the electron-binding energy (EBE) between ∼1.5 and 2.2 eV with the maximum at ∼1.9 eV. The measured value of the adiabatic electron affinity (AEA) for dAT was estimated to be ∼1.1 eV. Calculations performed at the M06-2X/6-31++G(d,p) level revealed that the structure, where thymine is coordinated to the sugar of dA by two hydrogen bonds, is responsible for the observed PES signal. The AEAG and the vertical detachment energy of 0.91 and 1.68 eV, respectively, calculated for this structure reproduce the experimental values well. The role of the possible proton transfer in the stabilization of anionic radical complexes is discussed.
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Affiliation(s)
- Piotr Storoniak
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, Gdańsk 80-308, Poland
| | - Janusz Rak
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, Gdańsk 80-308, Poland
| | - Haopeng Wang
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Yeon Jae Ko
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Kit H Bowen
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
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2
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Wang W, Marshall M, Collins E, Marquez S, Mu C, Bowen KH, Zhang X. Intramolecular electron-induced proton transfer and its correlation with excited-state intramolecular proton transfer. Nat Commun 2019; 10:1170. [PMID: 30862822 PMCID: PMC6414547 DOI: 10.1038/s41467-019-09154-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 02/20/2019] [Indexed: 11/09/2022] Open
Abstract
Electron-induced proton transfer depicts the proton motion coupled with the attachment of a low-energy electron to a molecule, which helps to understand copious fundamental chemical processes. Intramolecular electron-induced proton transfer is a similar process that occurs within a single molecule. To date, there is only one known intramolecular example, to the best of our knowledge. By studying the 10-hydroxybenzo[h]quinoline and 8-hydroxyquinoline molecules using anion photoelectron spectroscopy and density functional theory, and by theoretical screening of six other molecules, here we show the intramolecular electron-induced proton transfer capability of a long list of molecules that meanwhile have the excited-state intramolecular proton transfer property. Careful examination of the intrinsic electronic signatures of these molecules reveals that these two distinct processes should occur to the same category of molecules. Intramolecular electron-induced proton transfer could have potential applications such as molecular devices that are responsive to electrons or current.
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Affiliation(s)
- Wei Wang
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, 300071, Tianjin, China
| | - Mary Marshall
- Department of Chemistry, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Evan Collins
- Department of Chemistry, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Sara Marquez
- Department of Chemistry, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Chaonan Mu
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, 300071, Tianjin, China
| | - Kit H Bowen
- Department of Chemistry, Johns Hopkins University, Baltimore, MD, 21218, USA.
| | - Xinxing Zhang
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, 300071, Tianjin, China.
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Kočišek J, Pysanenko A, Fárník M, Fedor J. Microhydration Prevents Fragmentation of Uracil and Thymine by Low-Energy Electrons. J Phys Chem Lett 2016; 7:3401-3405. [PMID: 27525662 DOI: 10.1021/acs.jpclett.6b01601] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
When ionizing radiation passes biological matter, a large number of secondary electrons with very low energies (<3 eV) is produced. It is known that such electrons cause an efficient fragmentation of isolated nucleobases via dissociative electron attachment. We present an experimental study of the electron attachment to microhydrated nucleobases. Our novel approach allows significant control over the hydration of molecules studied in the molecular beam. We directly show for the first time that the presence of a few water molecules suppresses the dissociative channel and leads exclusively to formation of intact molecular and hydrated anions. The suppression of fragmentation is ascribed to caging-like effects and fast energy transfer to the solvent. This is in contrast with theoretical prediction that microhydration strongly enhances the fragmentation of nucleobases. The current observation impacts mechanisms of reductive DNA strand breaks proposed to date on the basis of gas-phase experiments.
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Affiliation(s)
- J Kočišek
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences , Dolejškova 3, 18223 Prague, Czech Republic
| | - A Pysanenko
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences , Dolejškova 3, 18223 Prague, Czech Republic
| | - M Fárník
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences , Dolejškova 3, 18223 Prague, Czech Republic
| | - J Fedor
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences , Dolejškova 3, 18223 Prague, Czech Republic
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Storoniak P, Rak J, Ko YJ, Wang H, Bowen KH. Excess Electron Attachment to the Nucleoside Pair 2′-Deoxyadenosine (dA)–2′-Deoxythymidine (dT). J Phys Chem B 2016; 120:4955-62. [DOI: 10.1021/acs.jpcb.6b03450] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Piotr Storoniak
- Faculty
of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Janusz Rak
- Faculty
of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Yeon Jae Ko
- Department
of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Haopeng Wang
- Department
of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Kit H. Bowen
- Department
of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
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Makurat S, Chomicz-Mańka L, Rak J. Electrophilic 5-Substituted Uracils as Potential Radiosensitizers: A Density Functional Theory Study. Chemphyschem 2016; 17:2572-8. [PMID: 27156191 DOI: 10.1002/cphc.201600240] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Indexed: 12/13/2022]
Abstract
Although 5-bromo-2'-deoxyuridine (5BrdU) possesses significant radiosensitizing power in vitro, clinical studies do not confirm any advantages of radiotherapy employing 5BrdU. This situation calls for a continuous search for efficient radiosensitizers. Using the proposed mechanism of radiosensitization by 5BrdU, we propose a series of 5-substituted uracils, XYU, that should undergo efficient dissociative electron attachment. The DFT-calculated thermodynamic and kinetic data concerning the XYU degradations induced by electron addition suggests that some of the scrutinized derivatives have much better characteristics than 5BrdU itself. Synthesis of these promising candidates for radiosensitizers, followed by studies of their radiosensitizing properties in DNA context, and ultimately in cancer cells, are further steps to confirm their potential applicability in anticancer treatment.
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Affiliation(s)
- Samanta Makurat
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308, Gdańsk, Poland
| | - Lidia Chomicz-Mańka
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308, Gdańsk, Poland.
| | - Janusz Rak
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308, Gdańsk, Poland.
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Wang Y, Zhang X, Lyapustina S, Nilles MM, Xu S, Graham JD, Bowen KH, Kelly JT, Tschumper GS, Hammer NI. The onset of electron-induced proton-transfer in hydrated azabenzene cluster anions. Phys Chem Chem Phys 2016; 18:704-12. [DOI: 10.1039/c5cp02746b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The prospect that protons from water may be transferred to N-heterocyclic molecules due to the presence of an excess electron is studied in hydrated azabenzene cluster anions using spectroscopy and computational chemistry.
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Affiliation(s)
- Yi Wang
- Department of Chemistry
- Johns Hopkins University
- Baltimore
- USA
| | - Xinxing Zhang
- Department of Chemistry
- Johns Hopkins University
- Baltimore
- USA
| | | | | | - Shoujun Xu
- Department of Chemistry
- Johns Hopkins University
- Baltimore
- USA
| | | | - Kit H. Bowen
- Department of Chemistry
- Johns Hopkins University
- Baltimore
- USA
| | - John T. Kelly
- Department of Chemistry and Biochemistry
- University of Mississippi
- University
- USA
| | | | - Nathan I. Hammer
- Department of Chemistry and Biochemistry
- University of Mississippi
- University
- USA
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Storoniak P, Rak J, Ko YJ, Wang H, Bowen KH. Photoelectron spectroscopic and density functional theoretical studies of the 2′-deoxycytidine homodimer radical anion. J Chem Phys 2013; 139:075101. [DOI: 10.1063/1.4817779] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kumar A, Sevilla MD. Proton-coupled electron transfer in DNA on formation of radiation-produced ion radicals. Chem Rev 2010; 110:7002-23. [PMID: 20443634 PMCID: PMC2947616 DOI: 10.1021/cr100023g] [Citation(s) in RCA: 172] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Anil Kumar
- Department of Chemistry, Oakland University, Rochester, MI 48309
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Ko YJ, Wang H, Radisic D, Stokes ST, Eustis SN, Bowen KH, Mazurkiewicz K, Storoniak P, Kowalczyk A, Haranczyk M, Gutowski M, Rak J. Barrier-free proton transfer induced by electron attachment to the complexes between 1‐methylcytosine and formic acid. Mol Phys 2010. [DOI: 10.1080/00268976.2010.515623] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Yeon Jae Ko
- a Department of Chemistry , Johns Hopkins University , Baltimore , MD 21218 , USA
| | - Haopeng Wang
- a Department of Chemistry , Johns Hopkins University , Baltimore , MD 21218 , USA
| | - Dunja Radisic
- a Department of Chemistry , Johns Hopkins University , Baltimore , MD 21218 , USA
| | - Sarah T. Stokes
- a Department of Chemistry , Johns Hopkins University , Baltimore , MD 21218 , USA
| | - Soren N. Eustis
- a Department of Chemistry , Johns Hopkins University , Baltimore , MD 21218 , USA
| | - Kit H. Bowen
- a Department of Chemistry , Johns Hopkins University , Baltimore , MD 21218 , USA
| | - Kamil Mazurkiewicz
- b Department of Chemistry , University of Gdańsk , Sobieskiego 18 , 80-952 Gdańsk , Poland
| | - Piotr Storoniak
- b Department of Chemistry , University of Gdańsk , Sobieskiego 18 , 80-952 Gdańsk , Poland
| | - Arkadiusz Kowalczyk
- b Department of Chemistry , University of Gdańsk , Sobieskiego 18 , 80-952 Gdańsk , Poland
| | - Maciej Haranczyk
- c Computational Research Division, Lawrence Berkeley National Laboratory , Berkeley , CA 94720 , USA
| | - Maciej Gutowski
- d Chemistry-School of Engineering and Physical Sciencs, Heriot-Watt University , Edinburgh EH14 4AS , UK
| | - Janusz Rak
- b Department of Chemistry , University of Gdańsk , Sobieskiego 18 , 80-952 Gdańsk , Poland
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Storoniak P, Mazurkiewicz K, Haranczyk M, Gutowski M, Rak J, Eustis SN, Ko YJ, Wang H, Bowen KH. The Anionic (9-Methyladenine)−(1-Methylthymine) Base Pair Solvated by Formic Acid. A Computational and Photoelectron Spectroscopy Study. J Phys Chem B 2010; 114:11353-62. [DOI: 10.1021/jp104668h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Piotr Storoniak
- Department of Chemistry, University of Gdańsk, Sobieskiego 18, 80-952 Gdańsk, Poland, Computational Research Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mail Stop 50F-1650, Berkeley, California 94720-8139, Chemistry-School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K., and Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Kamil Mazurkiewicz
- Department of Chemistry, University of Gdańsk, Sobieskiego 18, 80-952 Gdańsk, Poland, Computational Research Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mail Stop 50F-1650, Berkeley, California 94720-8139, Chemistry-School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K., and Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Maciej Haranczyk
- Department of Chemistry, University of Gdańsk, Sobieskiego 18, 80-952 Gdańsk, Poland, Computational Research Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mail Stop 50F-1650, Berkeley, California 94720-8139, Chemistry-School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K., and Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Maciej Gutowski
- Department of Chemistry, University of Gdańsk, Sobieskiego 18, 80-952 Gdańsk, Poland, Computational Research Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mail Stop 50F-1650, Berkeley, California 94720-8139, Chemistry-School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K., and Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Janusz Rak
- Department of Chemistry, University of Gdańsk, Sobieskiego 18, 80-952 Gdańsk, Poland, Computational Research Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mail Stop 50F-1650, Berkeley, California 94720-8139, Chemistry-School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K., and Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Soren N. Eustis
- Department of Chemistry, University of Gdańsk, Sobieskiego 18, 80-952 Gdańsk, Poland, Computational Research Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mail Stop 50F-1650, Berkeley, California 94720-8139, Chemistry-School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K., and Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Yeon Jae Ko
- Department of Chemistry, University of Gdańsk, Sobieskiego 18, 80-952 Gdańsk, Poland, Computational Research Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mail Stop 50F-1650, Berkeley, California 94720-8139, Chemistry-School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K., and Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Haopeng Wang
- Department of Chemistry, University of Gdańsk, Sobieskiego 18, 80-952 Gdańsk, Poland, Computational Research Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mail Stop 50F-1650, Berkeley, California 94720-8139, Chemistry-School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K., and Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Kit H. Bowen
- Department of Chemistry, University of Gdańsk, Sobieskiego 18, 80-952 Gdańsk, Poland, Computational Research Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mail Stop 50F-1650, Berkeley, California 94720-8139, Chemistry-School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K., and Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
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11
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Szyperska A, Rak J, Leszczynski J, Li X, Ko YJ, Wang H, Bowen KH. Low-Energy-Barrier Proton Transfer Induced by Electron Attachment to the Guanine⋅⋅⋅Cytosine Base Pair. Chemphyschem 2010; 11:880-8. [DOI: 10.1002/cphc.200900810] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Brun E, Cloutier P, Sicard-Roselli C, Fromm M, Sanche L. Damage induced to DNA by low-energy (0-30 eV) electrons under vacuum and atmospheric conditions. J Phys Chem B 2009; 113:10008-13. [PMID: 19603845 DOI: 10.1021/jp902540k] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
In this study, we show that it is possible to obtain data on DNA damage induced by low-energy (0-30 eV) electrons under atmospheric conditions. Five monolayer films of plasmid DNA (3197 base pairs) deposited on glass and gold substrates are irradiated with 1.5 keV X-rays in ultrahigh vacuum and under atmospheric conditions. The total damage is analyzed by agarose gel electrophoresis. The damage produced on the glass substrate is attributed to energy absorption from X-rays, whereas that produced on the gold substrate arises from energy absorption from both the X-ray beam and secondary electrons emitted from the gold surface. By analysis of the energy of these secondary electrons, 96% are found to have energies below 30 eV with a distribution peaking at 1.4 eV. The differences in damage yields recorded with the gold and glass substrates is therefore essentially attributed to the interaction of low-energy electrons with DNA under vacuum and hydrated conditions. From these results, the G values for low-energy electrons are determined to be four and six strand breaks per 100 eV, respectively.
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Affiliation(s)
- Emilie Brun
- Laboratoire de Chimie Physique, CNRS UMR 8000, Université Paris-Sud 11, Bat. 350, 91405 Orsay Cedex, France
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