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Wang SD, Zhang RB, Cadet J. Enhanced reactivity of the pyrimidine peroxyl radical towards the C–H bond in duplex DNA – a theoretical study. Org Biomol Chem 2020; 18:3536-3543. [DOI: 10.1039/d0ob00302f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The peroxyl radical exhibits a much stronger reactivity towards C1′–H1′ in duplex DNA with respect to single-stranded DNA.
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Affiliation(s)
- Shu-dong Wang
- School of Chemistry and Chemical Engineering
- Beijing Institute of Technology
- Beijing
- China
| | - Ru-bo Zhang
- School of Chemistry and Chemical Engineering
- Beijing Institute of Technology
- Beijing
- China
| | - Jean Cadet
- Département de Médecine Nucléaire et Radiobiologie
- Faculté de Médecine
- Université de Sherbrooke
- Sherbrooke
- Canada JIH 5N4
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2
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Razskazovskiy Y, Tegomoh M, Roginskaya M. Association with Polyamines and Polypeptides Increases the Relative Yield of 2-Deoxyribonolactone Lesions in Radiation-Damaged DNA. Radiat Res 2019; 192:324-330. [DOI: 10.1667/rr15396.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
| | - Modeste Tegomoh
- Departments of Chemistry, East Tennessee State University, Johnson City, Tennessee 37614
| | - Marina Roginskaya
- Departments of Chemistry, East Tennessee State University, Johnson City, Tennessee 37614
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3
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Tuna D, Sobolewski AL, Domcke W. Electronically excited states and photochemical reaction mechanisms of β-glucose. Phys Chem Chem Phys 2014; 16:38-47. [DOI: 10.1039/c3cp52359d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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4
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Du X, Zhao DX, Yang ZZ. Quick estimation of the Dpb for predicting the strength of chemical bond in situ. CHINESE CHEM LETT 2013. [DOI: 10.1016/j.cclet.2013.06.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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5
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Insight into reaction mechanism and product formation a C8-purine radical in RNA: a theoretical perspective. Theor Chem Acc 2013. [DOI: 10.1007/s00214-013-1355-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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6
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Du X, Zhao DX, Yang ZZ. Development of a method to accurately calculate the Dpb and quickly predict the strength of a chemical bond. Chem Phys 2013. [DOI: 10.1016/j.chemphys.2012.12.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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7
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Li MJ, Liu L, Wei K, Fu Y, Guo QX. Significant effects of phosphorylation on relative stabilities of DNA and RNA sugar radicals: remarkably high susceptibility of h-2' abstraction in RNA. J Phys Chem B 2007; 110:13582-9. [PMID: 16821885 DOI: 10.1021/jp060331j] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The roles of nucleic acid radicals in DNA and RNA damage cannot be properly understood in the absence of knowledge of the C-H bond strengths depicting the energy cost to generate each of these radicals. However, previous theoretical studies on the relative energies of different nucleic acid radicals are not fully convincing mainly because of the use of oversimplified model compounds. In the present study we chose nucleoside 3',5'-bisphosphates as model compounds for DNA and RNA, in which the effects of both the nucleobase and phosphorylation were taken into consideration. Using the newly developed ONIOM-G3B3 methods, we calculated the gas-phase bond dissociation enthalpies and solution-phase bond dissociation free energies of all the carbohydrate C-H bonds in the model compounds. It was found that the monoanionic phosphate group (OPO3H-) was a better radical stabilization group than the OH group by 1.3 kcal/mol, whereas the neutral phosphate group (OPO3H2) was a significantly worse radical stabilization group than OH by 4.4 kcal/mol. Due to these reasons, the relative thermodynamic susceptibility of H-abstraction from deoxyribonucleotides and ribonucleotides varied considerably depending on the phosphorylation state and the charge carried by the phosphate groups. Strikingly, the bond dissociation free energy of C2'-H in ribonucleotides was dramatically lower than that of all the other C-H bonds by 5-6 kcal/mol regardless of the phosphorylation state and the charge carried by the phosphate group. This explained the previous experimental finding that radiation damage of RNA occurs mainly via H-abstraction at H-2'. A model study suggested that the strength of the hydrogen bonding interaction between the 2'-OH and 3-phosphate groups should dramatically increase from ribonucleoside 3',5'-bisphosphate to its C2' radical. The strengthened hydrogen bonding stabilized the C2' radical, rendering the C2'-H bond of RNA extraordinarily vulnerable to H-abstraction.
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Affiliation(s)
- Min-Jie Li
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
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Li MJ, Liu L, Fu Y, Guo QX. Development of an ONIOM-G3B3 method to accurately predict C-H and N-H bond dissociation enthalpies of ribonucleosides and deoxyribonucleosides. J Phys Chem B 2007; 109:13818-26. [PMID: 16852730 DOI: 10.1021/jp0508204] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The roles of ribonucleoside and deoxyribonucleoside radicals in DNA and RNA damage cannot be properly understood in the absence of knowledge of the C-H and N-H bond dissociation enthalpies (BDEs) depicting the energy cost to generate each of these radicals. However, because the nucleoside radicals tend to be extremely short-lived and it is very difficult to separate and identify different nucleoside radicals, experimental BDEs for nucleosides have remained elusive. Herein, we developed an ONIOM-G3B3 method in order to reliably predict the BDEs of nucleosides and we carefully benchmarked this new method against over 60 experimental BDEs of diverse sizable molecules. It was found that the accuracy of the ONIOM-G3B3 method was about 1.4 kcal/mol for BDE calculations. Using the ONIOM-G3B3 method, a full scale of C-H and N-H BDEs were obtained for the first time for ribonucleosides and deoxyribonucleosides with an estimated error bar of +/-1.4 kcal/mol. Discussions were then made about the interesting connections between these BDE values and previously reported experimental observations concerning radical-mediated DNA and RNA lesions. The significance of the work is twofold: (i) Nucleosides represent one of the most important groups of compounds in science. A full scale of reliable bond dissociation enthalpies for nucleosides is of fundamental importance. (ii) This work demonstrates the feasibility to accurately predict the bond strength of various sizable molecules ranging from nanosize molecular devices to biologically significant compounds.
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Affiliation(s)
- Min-Jie Li
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
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Jayatilaka N, Nelson WH. Structure of radicals from X-irradiated guanine derivatives: an experimental and computational study of sodium guanosine dihydrate single crystals. J Phys Chem B 2007; 111:800-10. [PMID: 17249824 PMCID: PMC2716665 DOI: 10.1021/jp0659608] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In sodium guanosine dihydrate single crystals, the guanine moiety is deprotonated at N1 due to growth from high-pH (>12) solutions. Electron paramagnetic resonance (EPR) and electron-nuclear double resonance (ENDOR) studies of crystals X-irradiated at 10 K detected evidence for three radical forms. Radical R1, characterized by two proton and two nitrogen hyperfine interactions, was identified as the product of net hydrogenation at N7 of the N1-deprotonated guanine unit. R1 exhibited an unusually distorted structure leading to net positive isotropic components of the hydrogen alpha-couplings. Radical R2, characterized by one proton and one nitrogen hyperfine coupling, was identified as the primary electron-loss product. This product is equivalent to that of deprotonation at N1 by the guanine cation and represents the first ENDOR characterization of that product. Radical R3, characterized by a single hydrogen hyperfine coupling, was identified as the product of net dehydrogenation at C1' of the ribose moiety. The identification of radicals R1-R3 was supported by density functional theory (DFT) calculations on several possible structures using the B3LYP/6-311G(2df,p)//6-31G(d,p) approach. Radical R4, detected after warming the crystals to room temperature, was identified as the well-known product of net hydrogenation of C8 of the (N1-deprotonated) guanine component. Radical R1, evidently formed by protonation of the primary electron addition product, was present as roughly 60% of the total radicals detected at 10 K. Radical R2 was present as roughly 27% of the total yield, and the concentration of R3 contributed the remaining 13%. R3 is evidently the product of one-electron oxidation followed by deprotonation; thus, the balance of oxidation and reduction products is approximately equal within experimental uncertainty.
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Affiliation(s)
- Nayana Jayatilaka
- Department of Physics and Astronomy, Georgia State University, P.O. Box 4106, Atlanta, Georgia 30302-4106, USA
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Tureček F. Computational Studies of Radicals Relevant to Nucleic Acid Damage. ADVANCES IN QUANTUM CHEMISTRY 2007. [DOI: 10.1016/s0065-3276(06)52005-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/10/2023]
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11
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12
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Ptasińska S, Denifl S, Scheier P, Märk TD. Inelastic electron interaction (attachment/ionization) with deoxyribose. J Chem Phys 2006; 120:8505-11. [PMID: 15267776 DOI: 10.1063/1.1690231] [Citation(s) in RCA: 121] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have investigated experimentally the formation of anions and cations of deoxyribose sugar (C(5)H(10)O(4)) via inelastic electron interaction (attachment/ionization) using a monochromatic electron beam in combination with a quadrupole mass spectrometer. The ion yields were measured as a function of the incident electron energy between about 0 and 20 eV. As in the case of other biomolecules (nucleobases and amino acids), low energy electron attachment leads to destruction of the molecule via dissociative electron attachment reactions. In contrast to the previously investigated biomolecules dehydrogenation is not the predominant reaction channel for deoxyribose; the anion with the highest dissociative electron attachment (DEA) cross section of deoxyribose is formed by the release of neutral particles equal to two water molecules. Moreover, several of the DEA reactions proceed already with "zero energy" incident electrons. In addition, the fragmentation pattern of positively charged ions of deoxyribose also indicates strong decomposition of the molecule by incident electrons. For sugar the relative amount of fragment ions compared to that of the parent cation is about an order of magnitude larger than in the case of nucleobases. We determined an ionization energy value for C(5)H(10)O(4) (+) of 10.51+/-0.11 eV, which is in good agreement with ab initio calculations. For the fragment ion C(5)H(6)O(2) (+) we obtained a threshold energy lower than the ionization energy of the parent molecular ion. All of these results have important bearing for the question of what happens in exposure of living tissue to ionizing radiation. Energy deposition into irradiated cells produces electrons as the dominant secondary species. At an early time after irradiation these electrons exist as ballistic electrons with an initial energy distribution up to several tens of electron volts. It is just this energy regime for which we find in the present study rather characteristic differences in the outcome of electron interaction with the deoxyribose molecule compared to other nucleobases (studied earlier). Therefore, damage induced by these electrons to the DNA or RNA strands may start preferentially at the ribose backbone. In turn, damaged deoxyribose is known as a key intermediate in producing strand breaks, which are the most severe form of lesion in radiation damage to DNA and lead subsequently to cell death.
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Affiliation(s)
- S Ptasińska
- Institut für Ionenphysik, Leopold-Franzens Universität Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
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Evangelista FA, Schaefer HF. Structures and Energetics of Adenosine Radicals: (2‘-dAdo − H)•. J Phys Chem A 2004. [DOI: 10.1021/jp040361r] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Francesco A. Evangelista
- Scuola Normale Superiore di Pisa, 56126 Pisa, Italy, and Center for Computational Chemistry, University of Georgia, Athens, Georgia 30602-2525
| | - Henry F. Schaefer
- Scuola Normale Superiore di Pisa, 56126 Pisa, Italy, and Center for Computational Chemistry, University of Georgia, Athens, Georgia 30602-2525
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Vivekananda S, Sadílek M, Chen X, Turecek F. Modeling deoxyribose radicals by neutralization-reionization mass spectrometry. Part 1. Preparation, dissociations, and energetics of 2-hydroxyoxolan-2-yl radical, neutral isomers, and cations. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2004; 15:1055-1067. [PMID: 15234364 DOI: 10.1016/j.jasms.2004.03.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2003] [Revised: 03/26/2004] [Accepted: 03/29/2004] [Indexed: 05/24/2023]
Abstract
Collisional neutralization of several isomeric C(4)H(7)O(2) cations is used to generate radicals that share some structural features with transient species that are thought to be produced by radiolysis of 2-deoxyribose. The title 2-hydroxyoxolan-2-yl radical (1) undergoes nearly complete dissociation when produced by femtosecond electron transfer from thermal organic electron donors dimethyl disulfide and N,N-dimethylaniline in the gas phase. Product analysis, isotope labeling ((2)H and (18)O), and potential energy surface mapping by ab initio calculations at the G2(MP2) and B3-PMP2 levels of theory and in combination with Rice-Ramsperger-Kassel-Marcus (RRKM) kinetic calculations are used to assign the major and some minor pathways for 1 dissociations. The major (approximately 90%) pathway is initiated by cleavage of the ring C-5[bond]O bond in 1 and proceeds to form ethylene and *CH(2)COOH as main products, whereas loss of a hydrogen atom forms 4-hexenoic acid as a minor product. Loss of the OH hydrogen atom forming butyrolactone (2, approximately 9%) and cleavage of the C-3[bond]C-4 bonds (<1%) in 1 are other minor pathways. The major source of excitation in 1 is by Franck-Condon effects that cause substantial differences between the adiabatic and vertical ionization of 1 (5.40 and 6.89 eV, respectively) and vertical recombination in the precursor ion 1(+) (4.46 eV). (+)NR(+) mass spectra distinguish radical 1 from isomeric radicals 2-oxo-(1H)oxolanium (3), 1,3-dioxan-2-yl (9), and 1,3-dioxan-4-yl (10) that were generated separately from their corresponding ion precursors.
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15
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The properties of DNA C4′-centered sugar radicals: the importance of the computational model. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.03.063] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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