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Alcolea Palafox M, Franklin Benial AM, K Rastogi V. Biomolecules of 2-Thiouracil, 4-Thiouracil and 2,4-Dithiouracil: A DFT Study of the Hydration, Molecular Docking and Effect in DNA:RNAMicrohelixes. Int J Mol Sci 2019; 20:E3477. [PMID: 31311161 PMCID: PMC6678171 DOI: 10.3390/ijms20143477] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 07/10/2019] [Accepted: 07/11/2019] [Indexed: 12/17/2022] Open
Abstract
The molecular structure of 2-thiouracil, 4-thiouracil and 2,4-dithiouracil was analyzed under the effect of the first and second hydration shell by using the B3LYP density functional (DFT) method, and the results were compared to those obtained for the uracil molecule. A slight difference in the water distribution appears in these molecules. On the hydration of these molecules several trends in bond lengths and atomic charges were established. The ring in uracil molecule appears easier to be deformed and adapted to different environments as compared to that when it is thio-substituted. Molecular docking calculations of 2-thiouracil against three different pathogens: Bacillus subtilis, Escherichia coli and Candida albicans were carried out. Docking calculations of 2,4-dithiouracil ligand with various targeted proteins were also performed. Different DNA: RNA hybrid microhelixes with uridine, 2-thiouridine, 4-thiouridine and 2,4-dithiouridine nucleosides were optimized in a simple model with three nucleotide base pairs. Two main types of microhelixes were analyzed in detail depending on the intramolecular H-bond of the 2'-OH group. The weaker Watson-Crick (WC) base pair formed with thio-substituted uracil than with unsubstituted ones slightly deforms the helical and backbone parameters, especially with 2,4-dithiouridine. However, the thio-substitution significantly increases the dipole moment of the A-type microhelixes, as well as the rise and propeller twist parameters.
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Affiliation(s)
- M Alcolea Palafox
- Departamento de Química-Física, Facultad de CienciasQuímicas, Universidad Complutense de Madrid, 28040 Madrid, Spain.
| | | | - V K Rastogi
- Indian Spectroscopy Society, KC 68/1, Old Kavinagar, Ghaziabad 201002, India
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2
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Intersystem crossing dynamics in singly substituted thiouracil studied by time-resolved photoelectron spectroscopy: Micro-environmental effects due to sulfur position. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.08.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Wincel H. Hydration energies of protonated and sodiated thiouracils. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2014; 25:2134-2142. [PMID: 25270881 PMCID: PMC4221615 DOI: 10.1007/s13361-014-0987-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2014] [Revised: 08/13/2014] [Accepted: 08/19/2014] [Indexed: 06/03/2023]
Abstract
Hydration reactions of protonated and sodiated thiouracils (2-thiouracil, 6-methyl-2-thiouracil, and 4-thiouracil) generated by electrospray ionization have been studied in a gas phase at 10 mbar using a pulsed ion-beam high-pressure mass spectrometer. The thermochemical data, ΔH(o)n, ΔS(o)n, and ΔG(o)n, for the hydrated systems were obtained by equilibrium measurements. The water binding energies of protonated thiouracils, [2SU]H(+) and [6Me2SU]H(+), were found to be of the order of 51 kJ/mol for the first, and 46 kJ/mol for the second water molecule. For [4SU]H(+), these values are 3-4 kJ/mol lower. For sodiated complexes, these energies are similar for all studied systems, and varied between 62 and 68 kJ/mol for the first and between 48 and 51 kJ/mol for the second water molecule. The structural aspects of the precursors for hydrated complexes are discussed in conjunction with available literature data.
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Affiliation(s)
- Henryk Wincel
- Institute of Physical Chemistry, Polish Academy of Sciences, 01-224, Warsaw, Poland,
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4
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Barbituric acids as a useful tool for the construction of coordination and supramolecular compounds. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2014.01.002] [Citation(s) in RCA: 122] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Prasanthkumar KP, Suresh CH, Aravindakumar CT. Dimer radical cation of 4-thiouracil: a pulse radiolysis and theoretical study. J PHYS ORG CHEM 2013. [DOI: 10.1002/poc.3116] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- K. P. Prasanthkumar
- School of Chemical Sciences; Mahatma Gandhi University; Kottayam 686560 Kerala India
| | - Cherumuttathu H. Suresh
- National Institute for Interdisciplinary Science & Technology; Trivandrum 695019 Kerala India
| | - C. T. Aravindakumar
- School of Environmental Sciences; Mahatma Gandhi University; Kottayam 686560 Kerala India
- Inter University Instrumentation Center; Mahatma Gandhi University; Kottayam 686560 Kerala India
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Synthesis, structure and antimicrobial activity of 6-(propan-2-yl)-3-methyl-morpholine-2,5-dione. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2012.02.057] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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7
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WANG NANA, LI PING, HU YI, BU YUXIANG, WANG WEIHUA, XIE XIAOYAN. ASSOCIATION OF URACIL WITH Zn2+ AND THE HYDRATED Zn2+: A DFT INVESTIGATION. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2011. [DOI: 10.1142/s0219633607002927] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The association behaviors between Uracil and Zn 2+ in vacuum and in the presence of extra water molecules have been investigated systematically using the density functional theory (DFT). In these systems, the interaction of Zn 2+ with the carbonyl oxygen O 4 is systematically favored relative to O 2. For Uracil- Zn 2+ complexes, the more stable coordination mode among the possible complexes corresponds to the bidentate one, where the monodentate coordination mode is about 37 kcal/mol higher in energy relative to the bidentate case. Correspondingly, the stabilities of these structures are enhanced due to the formations of the four-membered chelate ring in the bidentate coordination processes. In the monodentate coordination complexes, the hydration effects are larger than those in the bidentate coordination complexes. The most basic center in the Uracil remains the same regardless of whether introducing the water molecules to Zn 2+ or not. The calculated Zn 2+ bonding energies in Uracil- Zn 2+( H 2 O ) complexes are reduced in comparison to those of the unhydrated Uracil- Zn 2+ complexes. Moreover, investigations of stepwise hydration of Zn 2+ in the most stable Uracil- Zn 2+ complex suggest that the successive hydration effect on the Zn 2+ site can enhance the strength of C = O bond in the Uracil- Zn 2+ complexes and reduce the association interaction of Uracil with Zn 2+. Additionally, the most acidic site of Uracil has been changed from N 1- to N 3– H group before and after introducing the Zn 2+ and there is a significant increase in the overall acidity of the system.
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Affiliation(s)
- NANA WANG
- Department of Chemistry, Qufu Normal University, Qufu, 273165, P. R. China
| | - PING LI
- Department of Chemistry, Qufu Normal University, Qufu, 273165, P. R. China
| | - YI HU
- High-performance Computational Center, Shandong University, Jinan, 250100, P. R. China
| | - YUXIANG BU
- Department of Chemistry, Qufu Normal University, Qufu, 273165, P. R. China
- Institute of Theoretical Chemistry, Shandong University, Jinan, 250100, P. R. China
| | - WEIHUA WANG
- Department of Chemistry, Qufu Normal University, Qufu, 273165, P. R. China
| | - XIAOYAN XIE
- Department of Chemistry, Qufu Normal University, Qufu, 273165, P. R. China
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5-Fluoro-4-thiouridine phosphoramidite: new synthon for introducing photoaffinity label into oligodeoxynucleotides. Bioorg Med Chem 2011; 19:6098-106. [PMID: 21917468 DOI: 10.1016/j.bmc.2011.08.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2011] [Revised: 08/09/2011] [Accepted: 08/14/2011] [Indexed: 11/21/2022]
Abstract
The synthesis of phosphoramidite of 5-fluoro-4-thio-2'-O-methyluridine is described. An appropriate set of protecting groups was optimized including the 4-thio function introduced via 4-triazolyl as the 4-(2-cyanoethyl)thio derivative, and the t-butyldimethyl silyl for 2' and 3' hydroxyl protection, enabling efficient synthesis of the phosphoramidite. These protecting groups prevented unwanted side reactions during oligonucleotide synthesis. The utility of the proposed synthetic route was proven by the preparation of several oligonucleotides via automated synthesis. Photochemical experiments confirmed the utility of the synthon.
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Li X, Chen J, Bowen KH. Photoelectron spectroscopic study of the negative ions of 4-thiouracil and 2,4-dithiouracil. J Chem Phys 2011; 134:074304. [DOI: 10.1063/1.3555177] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Wenska G, Koput J, Burdziński G, Taras-Goslinska K, Maciejewski A. Photophysical and photochemical properties of the T1 excited state of thioinosine. J Photochem Photobiol A Chem 2009. [DOI: 10.1016/j.jphotochem.2009.05.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Trujillo C, Lamsabhi AM, Mó O, Yáñez M, Salpin JY. Interaction of Ca2+ with uracil and its thio derivatives in the gas phase. Org Biomol Chem 2008; 6:3695-702. [DOI: 10.1039/b810418b] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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12
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Shukla M, Leszczynski J. A theoretical study of hydration of 4-thiouracil in the electronic singlet excited state. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.theochem.2006.03.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Wenska G, Taras-Goślińska K, Skalski B, Maciejewski A, Burdziński G, Karolczak J. Putative phototautomerization of 4-thiouridine in the S2 excited state revealed by fluorescence study using picosecond laser spectroscopy. J Photochem Photobiol A Chem 2006. [DOI: 10.1016/j.jphotochem.2005.10.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Khvorostov A, Lapinski L, Rostkowska H, Nowak MJ. Unimolecular photochemistry of 4-thiouracils. Photochem Photobiol 2006; 81:1205-11. [PMID: 15969615 DOI: 10.1562/2005-05-19-ra-534] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Unimolecular phototautomeric reactions in 4-thiouracil, 1-methyl-4-thiouracil and 6-aza-4-thiouracil were studied using the matrix-isolation technique combined with infrared absorption spectroscopy. For monomers of these compounds, isolated in solid argon at 10 K, an intramolecular proton-transfer photoreaction was observed. Upon UV (lambda > 345 nm) irradiation, the initial oxo-thione forms of 4-thiouracils were converted into the corresponding oxo-thiol tautomers. The photogenerated oxo-thiol isomers were identified by comparing their experimental IR spectra with the spectra theoretically calculated at the DFT(B3LYP)/6-311++G(2d,p) level. Good agreement between the observed and predicted pattern of spectral bands allowed a reliable identification. This is the first report on experimental observation of isomeric forms of 4-thiouracils other than the canonical oxo-thione tautomers.
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Affiliation(s)
- Artem Khvorostov
- Institute of Physics, Polish Academy of Sciences, Warsaw, Poland
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15
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Stanovnik B, Tišler M, Katritzky AR, Denisko OV. The Tautomerism of Heterocycles: Substituent Tautomerism of Six-Membered Ring Heterocycles. ADVANCES IN HETEROCYCLIC CHEMISTRY 2006. [DOI: 10.1016/s0065-2725(06)91001-0] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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16
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He W, Xue Y, Zhang H, Tian A, Wong NB, Wong NB. Modeling of Hydrogen Bonds in Monohydrated 2,4-Dithiothymine: An Ab Initio and AIM Study. J Phys Chem B 2005; 110:1416-22. [PMID: 16471692 DOI: 10.1021/jp053328t] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Twelve tautomers of 2,4-dithiothymine are calculated at the MP2/6-31+G(d) level, and the most stable one is referred to the di-keto form (P12). Then four H-bonded complexes between P12 and water are optimized at the MP2/6-31+G(d) level of theory. The calculation of vibrational frequencies and natural bond orbital analysis are also carried out at the same level to investigate the hydrogen bonds involved in all the systems. Within all the four complexes, three types of hydrogen bonds are formed, in which the O-H...S and N-H...O bonds are the normal bonds with the X-H bond elongation and red shift of the corresponding stretch frequencies, while the C-H...O interaction is an improper, blue-shifting hydrogen bond accompanied with the contraction of the C-H bond and a blue shift of the C-H stretch frequency. The topological properties are investigated with the atoms-in-molecules (AIM) theory. The NMR chemical shielding for the isolated and the four monohydrated 2,4-dithiothymine are calculated using the "gauge-including atomic orbital" (GIAO) method. The 1H chemical shifts are influenced by the formation of hydrogen bonds.
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Affiliation(s)
- Wendi He
- Faculty of Chemistry, Sichuan University, Chengdu, Sichuan 610064, PR China
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Lamsabhi AM, Alcamí M, Mó O, Yáñez M, Tortajada J. Association of Cu2+with Uracil and Its Thio Derivatives: A Theoretical Study. Chemphyschem 2004; 5:1871-8. [PMID: 15648135 DOI: 10.1002/cphc.200400208] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The structures and relative stabilities of the complexes between Cu2+ and uracil, 2-thiouracil, 4-thiouracil, and 2,4-dithiouracil were investigated by B3LYP/6-311+G(2df,2p)//B3LYP/6-31G* DFT calculations. In those systems in which both types of basic centers, that is, a carbonyl and a thiocarbonyl group, are present, association of Cu2+ with the oxygen atom is systematically favored, in contrast to what was found for the corresponding Cu+ complexes. This can be understood by considering that association of Cu2+ is immediately followed by oxidation of the base, which accumulates the negative charge at the oxygen atoms. Similarly, for 2,4-dithiouracil the most basic site for Cu+ attachment is the sulfur atom at the 4-position, while for association of Cu2+ it is sulfur at the 2-position. In contrast, differences between uracil-Cu+ and uracil-Cu2+ complexes are very small, and in both cases the oxygen atom at the 4-position is the most basic. Cu2+ binding energies are about 4 and 1.2 times larger than Cu+ binding energies and proton affinities, respectively. Uracil- and thiouracil-Cu2+ complexes are thermodynamically unstable but kinetically stable with respect to their dissociation into uracil*+ + Cu+ or thiouracil*+ + Cu+. The Cu2+ binding energies vary with the difference between the second ionization potential of the metal and the first ionization potential of the base. regardless of the reference acid (H+, Cu+, Cu2+) the basicity trend is 2,4-dithiouracil > 4-thiouracil > 2-thiouracil > uracil.
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Affiliation(s)
- Al Mokhtar Lamsabhi
- Departamento de Química C-9, Facultad de Ciencias Universidad Autónoma de Madrid Cantoblanco, 28049 Madrid, Spain
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Shukla MK, Leszczynski J. Electronic Transitions of Thiouracils in the Gas Phase and in Solutions: Time-Dependent Density Functional Theory (TD-DFT) Study. J Phys Chem A 2004. [DOI: 10.1021/jp0468962] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. K. Shukla
- Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, Jackson, Mississippi 39217
| | - Jerzy Leszczynski
- Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, Jackson, Mississippi 39217
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Shukla MK, Leszczynski J. Multiconfigurational Self-Consistent Field Study of the Excited State Properties of 4-Thiouracil in the Gas Phase. J Phys Chem A 2004. [DOI: 10.1021/jp049358y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. K. Shukla
- Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, Jackson, Mississippi 39217
| | - Jerzy Leszczynski
- Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, Jackson, Mississippi 39217
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20
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Lamsabhi AM, Alcamí M, Mó O, Yáñez M. Gas-Phase Reactivity of Uracil, 2-Thiouracil, 4-Thiouracil, and 2,4-Dithiouracil towards the Cu+ Cation: A DFT Study. Chemphyschem 2003; 4:1011-6. [PMID: 14562450 DOI: 10.1002/cphc.200300704] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Al Mokhtar Lamsabhi
- Departamento de Química, C-9 Universidad Autónoma de Madrid Cantoblanco, 28049-Madrid, Spain
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Lamsabhi M, Esseffar M, Bouab W, El Messaoudi T, El Messaoudi M, Abboud JLM, Alcamí M, Yáñez M. Gas-Phase Basicity of 2,7-Dimethyl-[1,2,4]-Triazepine Thio Derivatives. J Phys Chem A 2002. [DOI: 10.1021/jp0207782] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. Lamsabhi
- Laboratoires de Chimie Théorique et de Spectroscopie Moléculaire, Départment de Chimie, Faculté des Sciences Semlalia BP:2390 Bd. My Abdellah 40001 Marrakesh, Morocco, Laboratoire de Subtances naturelles et des Héterocycles, Département de Chimie, Faculté des Sciences Semlalia BP:2390 Bd. My Abdellah 40001 Marrakesh, Morocco, Instituto de Química Física, Rocasolano, CSIC, Serrano, 119, E−28006 Madrid, Spain, and Departamento de Química C-9, Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid, Spain
| | - M. Esseffar
- Laboratoires de Chimie Théorique et de Spectroscopie Moléculaire, Départment de Chimie, Faculté des Sciences Semlalia BP:2390 Bd. My Abdellah 40001 Marrakesh, Morocco, Laboratoire de Subtances naturelles et des Héterocycles, Département de Chimie, Faculté des Sciences Semlalia BP:2390 Bd. My Abdellah 40001 Marrakesh, Morocco, Instituto de Química Física, Rocasolano, CSIC, Serrano, 119, E−28006 Madrid, Spain, and Departamento de Química C-9, Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid, Spain
| | - W. Bouab
- Laboratoires de Chimie Théorique et de Spectroscopie Moléculaire, Départment de Chimie, Faculté des Sciences Semlalia BP:2390 Bd. My Abdellah 40001 Marrakesh, Morocco, Laboratoire de Subtances naturelles et des Héterocycles, Département de Chimie, Faculté des Sciences Semlalia BP:2390 Bd. My Abdellah 40001 Marrakesh, Morocco, Instituto de Química Física, Rocasolano, CSIC, Serrano, 119, E−28006 Madrid, Spain, and Departamento de Química C-9, Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid, Spain
| | - T. El Messaoudi
- Laboratoires de Chimie Théorique et de Spectroscopie Moléculaire, Départment de Chimie, Faculté des Sciences Semlalia BP:2390 Bd. My Abdellah 40001 Marrakesh, Morocco, Laboratoire de Subtances naturelles et des Héterocycles, Département de Chimie, Faculté des Sciences Semlalia BP:2390 Bd. My Abdellah 40001 Marrakesh, Morocco, Instituto de Química Física, Rocasolano, CSIC, Serrano, 119, E−28006 Madrid, Spain, and Departamento de Química C-9, Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid, Spain
| | - M. El Messaoudi
- Laboratoires de Chimie Théorique et de Spectroscopie Moléculaire, Départment de Chimie, Faculté des Sciences Semlalia BP:2390 Bd. My Abdellah 40001 Marrakesh, Morocco, Laboratoire de Subtances naturelles et des Héterocycles, Département de Chimie, Faculté des Sciences Semlalia BP:2390 Bd. My Abdellah 40001 Marrakesh, Morocco, Instituto de Química Física, Rocasolano, CSIC, Serrano, 119, E−28006 Madrid, Spain, and Departamento de Química C-9, Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid, Spain
| | - J. L.-M. Abboud
- Laboratoires de Chimie Théorique et de Spectroscopie Moléculaire, Départment de Chimie, Faculté des Sciences Semlalia BP:2390 Bd. My Abdellah 40001 Marrakesh, Morocco, Laboratoire de Subtances naturelles et des Héterocycles, Département de Chimie, Faculté des Sciences Semlalia BP:2390 Bd. My Abdellah 40001 Marrakesh, Morocco, Instituto de Química Física, Rocasolano, CSIC, Serrano, 119, E−28006 Madrid, Spain, and Departamento de Química C-9, Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid, Spain
| | - M. Alcamí
- Laboratoires de Chimie Théorique et de Spectroscopie Moléculaire, Départment de Chimie, Faculté des Sciences Semlalia BP:2390 Bd. My Abdellah 40001 Marrakesh, Morocco, Laboratoire de Subtances naturelles et des Héterocycles, Département de Chimie, Faculté des Sciences Semlalia BP:2390 Bd. My Abdellah 40001 Marrakesh, Morocco, Instituto de Química Física, Rocasolano, CSIC, Serrano, 119, E−28006 Madrid, Spain, and Departamento de Química C-9, Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid, Spain
| | - M. Yáñez
- Laboratoires de Chimie Théorique et de Spectroscopie Moléculaire, Départment de Chimie, Faculté des Sciences Semlalia BP:2390 Bd. My Abdellah 40001 Marrakesh, Morocco, Laboratoire de Subtances naturelles et des Héterocycles, Département de Chimie, Faculté des Sciences Semlalia BP:2390 Bd. My Abdellah 40001 Marrakesh, Morocco, Instituto de Química Física, Rocasolano, CSIC, Serrano, 119, E−28006 Madrid, Spain, and Departamento de Química C-9, Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid, Spain
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Kryachko E, Nguyen MT, Zeegers-Huyskens T. Thiouracils: Acidity, Basicity, and Interaction with Water. J Phys Chem A 2001. [DOI: 10.1021/jp003703b] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Eugene Kryachko
- Department of Chemistry, University of Leuven, 200F Celestijnenlaan, B-3001 Heverlee, Belgium
| | - Minh Tho Nguyen
- Department of Chemistry, University of Leuven, 200F Celestijnenlaan, B-3001 Heverlee, Belgium
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Kryachko ES, Nguyen MT, Zeegers-Huyskens T. Density functional calculations on protonated and deprotonated thiouracils and their complexes with water. Chem Phys 2001. [DOI: 10.1016/s0301-0104(00)00386-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Rauhut G. Recent Advances in Computing Heteroatom-Rich Five- and Six-Membered Ring Systems. ADVANCES IN HETEROCYCLIC CHEMISTRY 2001. [DOI: 10.1016/s0065-2725(01)81010-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
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Kryachko ES, Nguyen MT. Thiouracils: Structures, tautomerism, interaction with water, and functioning in RNA and modified DNA base Pairs. ADVANCES IN QUANTUM CHEMISTRY 2001. [DOI: 10.1016/s0065-3276(01)40010-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Orozco M, Luque FJ. Theoretical Methods for the Description of the Solvent Effect in Biomolecular Systems. Chem Rev 2000; 100:4187-4226. [PMID: 11749344 DOI: 10.1021/cr990052a] [Citation(s) in RCA: 454] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Modesto Orozco
- Departament de Bioquímica i Biologia Molecular, Facultat de Química, Universitat de Barcelona, Martí i Franqués 1, E-08028 Barcelona, Spain, and Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Avgda. Diagonal s/n, E-08028 Barcelona, Spain
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Lamsabhi M, Alcamí M, Mó O, Bouab W, Esseffar M, Abboud JLM, Yáñez M. Are the Thiouracils Sulfur Bases in the Gas-phase? J Phys Chem A 2000. [DOI: 10.1021/jp000071k] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. Lamsabhi
- Departement de Chimie, Faculté des Sciences Semlalia Université Cadi Ayyad., Marrakech, Morocco, Departamento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, and Instituto “Rocasolano”, C.S.I.C., Serrano, 119, 28006-Madrid, Spain
| | - M. Alcamí
- Departement de Chimie, Faculté des Sciences Semlalia Université Cadi Ayyad., Marrakech, Morocco, Departamento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, and Instituto “Rocasolano”, C.S.I.C., Serrano, 119, 28006-Madrid, Spain
| | - O. Mó
- Departement de Chimie, Faculté des Sciences Semlalia Université Cadi Ayyad., Marrakech, Morocco, Departamento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, and Instituto “Rocasolano”, C.S.I.C., Serrano, 119, 28006-Madrid, Spain
| | - W. Bouab
- Departement de Chimie, Faculté des Sciences Semlalia Université Cadi Ayyad., Marrakech, Morocco, Departamento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, and Instituto “Rocasolano”, C.S.I.C., Serrano, 119, 28006-Madrid, Spain
| | - M. Esseffar
- Departement de Chimie, Faculté des Sciences Semlalia Université Cadi Ayyad., Marrakech, Morocco, Departamento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, and Instituto “Rocasolano”, C.S.I.C., Serrano, 119, 28006-Madrid, Spain
| | - J. L.-M. Abboud
- Departement de Chimie, Faculté des Sciences Semlalia Université Cadi Ayyad., Marrakech, Morocco, Departamento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, and Instituto “Rocasolano”, C.S.I.C., Serrano, 119, 28006-Madrid, Spain
| | - M. Yáñez
- Departement de Chimie, Faculté des Sciences Semlalia Université Cadi Ayyad., Marrakech, Morocco, Departamento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, and Instituto “Rocasolano”, C.S.I.C., Serrano, 119, 28006-Madrid, Spain
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Lapiński L, Nowak MJ, Kwiatkowski JS, Leszczynski J. Phototautomeric Reaction, Tautomerism, and Infrared Spectra of 6-Thiopurine. Experimental Matrix Isolation and Quantum-Mechanical (Conventional ab Initio and Density-Functional Theory) Studies. J Phys Chem A 1999. [DOI: 10.1021/jp982805n] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Leszek Lapiński
- Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw, Poland, Institute of Physics, Nicholas Copernicus University, ul. Grudziadzka 5, 87-100 Toruń, Poland, Interdisciplinary Centre for Mathematical and Computational Modeling, University of Warsaw, ul. Pawinskiego 5a, 02-106 Warsaw, Poland, and the Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, 1400 Lynch Street, Jackson, Mississippi 39217
| | - Maciej J. Nowak
- Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw, Poland, Institute of Physics, Nicholas Copernicus University, ul. Grudziadzka 5, 87-100 Toruń, Poland, Interdisciplinary Centre for Mathematical and Computational Modeling, University of Warsaw, ul. Pawinskiego 5a, 02-106 Warsaw, Poland, and the Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, 1400 Lynch Street, Jackson, Mississippi 39217
| | - Józef S. Kwiatkowski
- Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw, Poland, Institute of Physics, Nicholas Copernicus University, ul. Grudziadzka 5, 87-100 Toruń, Poland, Interdisciplinary Centre for Mathematical and Computational Modeling, University of Warsaw, ul. Pawinskiego 5a, 02-106 Warsaw, Poland, and the Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, 1400 Lynch Street, Jackson, Mississippi 39217
| | - Jerzy Leszczynski
- Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw, Poland, Institute of Physics, Nicholas Copernicus University, ul. Grudziadzka 5, 87-100 Toruń, Poland, Interdisciplinary Centre for Mathematical and Computational Modeling, University of Warsaw, ul. Pawinskiego 5a, 02-106 Warsaw, Poland, and the Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, 1400 Lynch Street, Jackson, Mississippi 39217
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A semiempirical MO study of tautomerism and the electronic structure of barbituric acid. J CHEM SCI 1998. [DOI: 10.1007/bf02872580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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