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Hou J, Li X, Yan K, Zhang L, Loh TP, Xie P. Uracil-Cu(i) catalyst: allylation of cyclopropanols with Morita-Baylis-Hillman alcohols under water-tolerant conditions. Chem Sci 2024; 15:1143-1149. [PMID: 38239700 PMCID: PMC10793597 DOI: 10.1039/d3sc04890j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 12/07/2023] [Indexed: 01/22/2024] Open
Abstract
Inspired by the high affinity of copper with DNA and RNA, a uracil-copper catalytic system was developed to promote ring-opening allylation of cyclopropanols with allylic alcohols under water-tolerant conditions. A new C-OH bond-breaking model can well resolve the trade-off between the need for acidic activators for C(allyl)-OH bond cleavage and the demand for strong basic conditions for generating homoenolates. Therefore, Morita-Baylis-Hillman alcohols, rather than their pre-activated versions, could be incorporated directly into dehydrative cross-coupling with cyclopropanols delivering water as the only by-product. A variety of functionalized δ,ε-unsaturated ketones were obtained in good-to-high yield with high E-selectivity.
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Affiliation(s)
- Jingwei Hou
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
| | - Xiaohong Li
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
| | - Kaiyu Yan
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
| | - Lei Zhang
- School of Science, Tianjin Chengjian University Tianjin 300384 China
| | - Teck-Peng Loh
- College of Advanced Interdisciplinary Science and Technology, Henan University of Technology Zhengzhou 450001 China
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University Singapore 637371
| | - Peizhong Xie
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
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Jašíková L, Roithová J. Infrared Multiphoton Dissociation Spectroscopy with Free-Electron Lasers: On the Road from Small Molecules to Biomolecules. Chemistry 2018; 24:3374-3390. [PMID: 29314303 DOI: 10.1002/chem.201705692] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Indexed: 01/07/2023]
Abstract
Infrared multiphoton dissociation (IRMPD) spectroscopy is commonly used to determine the structure of isolated, mass-selected ions in the gas phase. This method has been widely used since it became available at free-electron laser (FEL) user facilities. Thus, in this Minireview, we examine the use of IRMPD/FEL spectroscopy for investigating ions derived from small molecules, metal complexes, organometallic compounds and biorelevant ions. Furthermore, we outline new applications of IRMPD spectroscopy to study biomolecules.
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Affiliation(s)
- Lucie Jašíková
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030, Prague 2, 128 43, Czech Republic
| | - Jana Roithová
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030, Prague 2, 128 43, Czech Republic
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Salpin JY, Latrous L, Haldys V, Lamsabhi AM. Interactions of Dimethyltin(IV) with Uracil As Studied in the Gas Phase. J Phys Chem A 2018; 122:992-1003. [DOI: 10.1021/acs.jpca.7b11510] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jean-Yves Salpin
- LAMBE, CNRS, Univ Evry, CEA, Université Paris-Saclay, F-91025 Evry, France
- LAMBE,
UCP, Université Paris-Seine, F-91025 Evry, France
| | - Latifa Latrous
- Faculté
des Sciences de Tunis, Laboratoire de Chimie Analytique et Electrochimie
Campus universitaire, Université de Tunis El Manar, 2092 Tunis, Tunisia
| | - Violette Haldys
- LAMBE, CNRS, Univ Evry, CEA, Université Paris-Saclay, F-91025 Evry, France
- LAMBE,
UCP, Université Paris-Seine, F-91025 Evry, France
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Cheng R, Rose VE, Power B, Fridgen TD. Self-assembled uracil complexes containing tautomeric uracils: an IRMPD spectroscopic and computation study of the structures of gaseous uracilnCa2+ (n = 4, 5, or 6) complexes. Phys Chem Chem Phys 2018; 20:572-580. [DOI: 10.1039/c7cp07128k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The structures of doubly-charged uracil (U) complexes with Ca2+, UnCa2+ (n = 4, 5, 6), were studied by infrared multiphoton dissociation (IRMPD) spectroscopy and computational methods.
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Affiliation(s)
- Ruodi Cheng
- Department of Chemistry
- Memorial University
- St. John's
- Canada
| | | | - Barry Power
- Department of Chemistry
- Memorial University
- St. John's
- Canada
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Zhu Y, Roy HA, Cunningham NA, Strobehn SF, Gao J, Munshi MU, Berden G, Oomens J, Rodgers MT. IRMPD Action Spectroscopy, ER-CID Experiments, and Theoretical Studies of Sodium Cationized Thymidine and 5-Methyluridine: Kinetic Trapping During the ESI Desolvation Process Preserves the Solution Structure of [Thd+Na]<sup/>. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2017; 28:2423-2437. [PMID: 28836109 DOI: 10.1007/s13361-017-1753-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 07/01/2017] [Accepted: 07/02/2017] [Indexed: 05/25/2023]
Abstract
Thymidine (dThd) is a fundamental building block of DNA nucleic acids, whereas 5-methyluridine (Thd) is a common modified nucleoside found in tRNA. In order to determine the conformations of the sodium cationized thymine nucleosides [dThd+Na]+ and [Thd+Na]+ produced by electrospray ionization, their infrared multiple photon dissociation (IRMPD) action spectra are measured. Complementary electronic structure calculations are performed to determine the stable low-energy conformations of these complexes. Geometry optimizations and frequency analyses are performed at the B3LYP/6-311+G(d,p) level of theory, whereas energies are calculated at the B3LYP/6-311+G(2d,2p) level of theory. As protonation preferentially stabilizes minor tautomers of dThd and Thd, tautomerization facilitated by Na+ binding is also considered. Comparisons of the measured IRMPD and computed IR spectra find that [dThd+Na]+ prefers tridentate (O2,O4',O5') coordination to the canonical 2,4-diketo form of dThd with thymine in a syn orientation. In contrast, [Thd+Na]+ prefers bidentate (O2,O2') coordination to the canonical 2,4-diketo tautomer of Thd with thymine in an anti orientation. Although 2,4-dihydroxy tautomers and O2 protonated thymine nucleosides coexist in the gas phase, no evidence for minor tautomers is observed for the sodium cationized species. Consistent with experimental observations, the computational results confirm that the sodium cationized thymine nucleosides exhibit a strong preference for the canonical form of the thymine nucleobase. Survival yield analyses based on energy-resolved collision-induced dissociation (ER-CID) experiments suggest that the relative stabilities of protonated and sodium cationized dThd and Thd follow the order [dThd+H]+ < [Thd+H]+ < [dThd+Na]+ < [Thd+Na]+. Graphical Abstract ᅟ.
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Affiliation(s)
- Y Zhu
- Department of Chemistry, Wayne State University, Detroit, MI, 48202, USA
| | - H A Roy
- Department of Chemistry, Wayne State University, Detroit, MI, 48202, USA
| | - N A Cunningham
- Department of Chemistry, Wayne State University, Detroit, MI, 48202, USA
| | - S F Strobehn
- Department of Chemistry, Wayne State University, Detroit, MI, 48202, USA
| | - J Gao
- Institute for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7c, 6525ED, Nijmegen, The Netherlands
| | - M U Munshi
- Institute for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7c, 6525ED, Nijmegen, The Netherlands
| | - G Berden
- Institute for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7c, 6525ED, Nijmegen, The Netherlands
| | - J Oomens
- Institute for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7c, 6525ED, Nijmegen, The Netherlands
| | - M T Rodgers
- Department of Chemistry, Wayne State University, Detroit, MI, 48202, USA.
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Zhu Y, Roy HA, Cunningham NA, Strobehn SF, Gao J, Munshi MU, Berden G, Oomens J, Rodgers MT. Effects of sodium cationization versus protonation on the conformations and N-glycosidic bond stabilities of sodium cationized Urd and dUrd: solution conformation of [Urd+Na] + is preserved upon ESI. Phys Chem Chem Phys 2017; 19:17637-17652. [PMID: 28665436 DOI: 10.1039/c7cp02377d] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Uridine (Urd) is one of the naturally occurring pyrimidine nucleosides of RNA. 2'-Deoxyuridine (dUrd) is a naturally occurring modified form of Urd, but is not one of the canonical DNA nucleosides. In order to understand the effects of sodium cationization on the conformations and energetics of Urd and dUrd, infrared multiple photon dissociation (IRMPD) action spectroscopy experiments and density functional theory (DFT) calculations are performed. By comparing the calculated IR spectra of [Urd+Na]+ and [dUrd+Na]+ with the measured IRMPD spectra, the stable low-energy conformers populated in the experiments are determined. Anti oriented bidentate O2 and O2' binding conformers of [Urd+Na]+ are the dominant conformers populated in the experiments, whereas syn oriented tridentate O2, O4', and O5' binding conformers of [dUrd+Na]+ are dominantly populated in the experiments. The 2'-hydroxyl substituent of Urd stabilizes the anti oriented O2 binding conformers of [Urd+Na]+. Significant differences between the measured IRMPD and calculated IR spectra for complexes of [Urd+Na]+ and [dUrd+Na]+ involving minor tautomeric forms of the nucleobase make it obvious that none are populated in the experiments. Survival yield analyses based on energy-resolved collision-induced dissociation (ER-CID) experiments suggest that the relative stabilities of protonated and sodium cationized Urd and dUrd follow the order: [dUrd+H]+ < [Urd+H]+ < [dUrd+Na]+ < [Urd+Na]+. The 2'-deoxy modification is found to weaken the glycosidic bond of dUrd versus that of Urd for the sodium cationized uridine nucleosides.
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Affiliation(s)
- Y Zhu
- Department of Chemistry, Wayne State University, Detroit, MI 48202, USA.
| | - H A Roy
- Department of Chemistry, Wayne State University, Detroit, MI 48202, USA.
| | - N A Cunningham
- Department of Chemistry, Wayne State University, Detroit, MI 48202, USA.
| | - S F Strobehn
- Department of Chemistry, Wayne State University, Detroit, MI 48202, USA.
| | - J Gao
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525ED Nijmegen, The Netherlands
| | - M U Munshi
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525ED Nijmegen, The Netherlands
| | - G Berden
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525ED Nijmegen, The Netherlands
| | - J Oomens
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525ED Nijmegen, The Netherlands
| | - M T Rodgers
- Department of Chemistry, Wayne State University, Detroit, MI 48202, USA.
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Power B, Rowe S, Fridgen TD. Ammoniated Complexes of Uracil and Transition Metal Ions: Structures of [M(Ura-H)(Ura)(NH3)]+ by IRMPD Spectroscopy and Computational Methods (M = Fe, Co, Ni, Cu, Zn, Cd). J Phys Chem B 2016; 121:58-65. [DOI: 10.1021/acs.jpcb.6b09614] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Barry Power
- Department of Chemistry, Memorial University, St. John’s, Newfoundland and Labrador, Canada A1B 3X7
| | - Steven Rowe
- Department of Chemistry, Memorial University, St. John’s, Newfoundland and Labrador, Canada A1B 3X7
| | - Travis D. Fridgen
- Department of Chemistry, Memorial University, St. John’s, Newfoundland and Labrador, Canada A1B 3X7
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Power B, Haldys V, Salpin JY, Fridgen TD. Structures of [M(Ura-H)(H2 O)n ](+) (M = Mg, Ca, Sr, Ba; n = 1-3) complexes in the gas phase by IRMPD spectroscopy and theoretical studies. JOURNAL OF MASS SPECTROMETRY : JMS 2016; 51:236-244. [PMID: 26956390 DOI: 10.1016/j.ijms.2017.05.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 11/23/2015] [Accepted: 11/25/2015] [Indexed: 05/17/2023]
Abstract
The structures of singly and doubly (and for Mg, triply) hydrated group 2 metal dications bound to deprotonated uracil were explored in the gas phase using infrared multiple photon dissociation spectroscopy in the mid-infrared region (1000-1900 cm(-1) ) and the O-H/N-H stretching region (2700-3800 cm(-1) ) in a Fourier transform ion cyclotron resonance mass spectrometer. The infrared multiple photon dissociation spectra were then compared with the computed IR spectra for various isomers. Calculations were performed using B3LYP with the 6-31 + G(d,p) basis set for all atoms except Ba(2+) and Sr(2+) , for which the LANL2DZ or the def2-TZVPP basis sets with relativistic core potentials were used. Atoms-in-molecules analysis was conducted for all lowest energy structures. The lowest energy isomers in all cases are those in which the one uracil is deprotonated at the N3 position, and the metal is coordinated to the N3 and O4 of uracil. Regardless of the degree of solvation, all water molecules are bound to the metal ion and participate in a hydrogen bond with a carbonyl of the uracil moiety.
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Affiliation(s)
- Barry Power
- Department of Chemistry, Memorial University of Newfoundland, St. John's, NL, A1B 3X7, Canada
| | - Violette Haldys
- Université d'Evry Val d'Essonne - Laboratoire d'Analyse et Modélisation pour la Biologie et l'Environnement (LAMBE), Bâtiment Maupertuis, Boulevard François Mitterrand, 91025, Evry, France
- CNRS UMR 8587
| | - Jean-Yves Salpin
- Université d'Evry Val d'Essonne - Laboratoire d'Analyse et Modélisation pour la Biologie et l'Environnement (LAMBE), Bâtiment Maupertuis, Boulevard François Mitterrand, 91025, Evry, France
- CNRS UMR 8587
| | - Travis D Fridgen
- Department of Chemistry, Memorial University of Newfoundland, St. John's, NL, A1B 3X7, Canada
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Salpin JY, Scuderi D. Structure of protonated thymidine characterized by infrared multiple photon dissociation and quantum calculations. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2015; 29:1898-1904. [PMID: 26411511 DOI: 10.1002/rcm.7296] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 07/23/2015] [Accepted: 07/29/2015] [Indexed: 06/05/2023]
Abstract
RATIONALE Many fundamental studies are motivated by the probable relationship between the presence of rare enol tautomers of nucleobases and point mutation developing during nucleic acid replication. The evaluation of the tautomeric behaviour of nucleobases is therefore of fundamental importance. This can be probed in the gas phase by combining action spectroscopy and mass spectrometry. METHODS Experimental Infrared Multiple Photon Dissociation spectra in the fingerprint region of electrospray-generated and subsequently selected ions were recorded at the CLIO free electron laser (FEL) facility, by coupling the FEL to a quadrupole ion trap, and compared to calculated harmonic vibrational infrared spectra of the different low-lying isomers computed at the B3LYP/6-31++G(d,p) level. Relative energies were refined using the extended basis set 6-311++G(3df,2p). RESULTS The Density Functional Theory (DFT) study shows that, as for protonated thymine, the global energy minimum of protonated thymidine corresponds to an enol tautomer, whose infrared absorption spectrum is found to be in very good agreement with the experimental IRMPD spectrum. A very weak IRMPD signal observed at ~1780 cm(-1) is very likely the signature of an oxo tautomer. Consequently, as for thymine, protonated thymidine generated by electrospray corresponds to a mixture of at least two tautomeric forms. CONCLUSIONS Tautomerization can be characterized by IRMPD spectroscopy. Interestingly, the dominant enolic tautomeric form(s) presently observed cannot be directly generated from the most stable neutral tautomer of the thymine residue.
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Affiliation(s)
- Jean-Yves Salpin
- Université d'Evry Val d'Essonne, Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement, Boulevard François Mitterrand, 91025, Evry, France
- CNRS-UMR 8587
| | - Debora Scuderi
- Université Paris Sud Orsay, Laboratoire de Chimie Physique, Bâtiment 350, 91405, Orsay, France
- CNRS - UMR 8000
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Brea O, Yáñez M, Mó O, Lamsabhi AM. Why Is the Spontaneous Deprotonation of [Cu(uracil)2]2+Complexes Accompanied by Enolization of the System? Chemphyschem 2015; 16:2375-82. [DOI: 10.1002/cphc.201500262] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Indexed: 11/10/2022]
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Patil YP, Nethaji M. Synthesis and crystal structure of copper (II) uracil ternary polymeric complex with 1,10-phenanthroline along with the Hirshfeld surface analysis of the metal binding sites for the uracil ligand. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.09.052] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Salpin JY, Haldys V, Guillaumont S, Tortajada J, Hurtado M, Lamsabhi AM. Gas-Phase Interactions between Lead(II) Ions and Cytosine: Tandem Mass Spectrometry and Infrared Multiple-Photon Dissociation Spectroscopy Study. Chemphyschem 2014; 15:2959-71. [DOI: 10.1002/cphc.201402369] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Indexed: 12/07/2022]
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Gholami A, Fridgen TD. The unimolecular chemistry of [Zn(amino acid)2-H]+ in the gas phase: H2 elimination when the amino acid is a secondary amine. Phys Chem Chem Phys 2014; 16:3134-43. [PMID: 24402409 DOI: 10.1039/c3cp53716a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The unimolecular chemistry of the [Zn(Pro-H)(Pro)](+) complex following collisional or infrared multiple photon activation was studied, and interestingly was found to lose H2 as one of the main dissociation pathways. Furthermore a second dehydrogenation step, forming [Zn(Pro-H)(Pro)-2H2](+), was also observed. When proline was substituted for sarcosine, also a secondary amine, a single dehydrogenation was observed. In contrast, [Zn(Gly-H)(Gly)](+) and [Zn(Ala-H)(Ala)](+) were found to lose H2O as their primary fragmentation route with no dehydrogenation observed. Tandem mass spectrometry, deuterium substitution, and infrared spectroscopy were used to determine the origin of the H atoms in the losses of H2, as well as for other fragmentation routes, including the loss of H2O. The hydrogen atoms for H2 loss from [Zn(Pro-H)(Pro)](+) was found to originate on the amine group and primarily from C5 on the non-deprotonated proline, with a smaller contribution from the C2 hydrogen. Both hydrogens for H2O loss were determined to be from labile hydrogens. Potential energy surfaces were computed for the H2 loss and H2O loss routes for both [Zn(Pro-H)(Pro)](+) and [Zn(Gly-H)(Gly)](+) and were compared. For [Zn(Pro-H)(Pro)](+), H2 loss was found to be the pathway with the lower energy requirement than for H2O loss, and the opposite was found for [Zn(Gly-H)(Gly)](+). The greater basicities of proline and sarcosine are most likely responsible for stabilizing the 3 coordinate Zn(2+) transition states en route to H2 loss, compared to those complexes formed with the much less basic glycine or alanine.
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Affiliation(s)
- Ameneh Gholami
- Department of Chemistry, Memorial University, St. John's, Newfoundland and Labrador, Canada A1B 3X7.
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Ivanova B, Spiteller M. UV-MALDI mass spectrometric quantitation of uracil based pesticides in fruit soft drinks along with matrix effects evaluation. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2014; 100:233-241. [PMID: 24018142 DOI: 10.1016/j.ecoenv.2013.08.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 08/06/2013] [Accepted: 08/08/2013] [Indexed: 06/02/2023]
Abstract
This study focused on the development of the accurate and precise quantitative method for the determination of pesticides bromacil (1), terbacil (2), lenacil (3), butafenacil (4) and flupropacil (5) in fruit based soft drinks. Three different types of drinks are bought from market; huddled orange fruit drink (100%) (I), red-oranges (II) and multivitamin drink containing strawberry, orange, banana and maracuja (III). Samples were analyzed "with" and "without" pulp utilizing LC-ESI (or APCI) MS/MS, HPLC-ESI-(or APCI)-MS/MS and UV-MALDI-Orbitrap-MS methods. The effect of high complexity of the food matrix on the analysis was discussed. Study focuses on the advantages of the UV-MALDI-Orbitrap-MS method compared to the traditionally involved GC alone or hybrid methods such as GC-MS and LC-MS/MS for quantification of pesticides in water and soft drinks. The developed method included the techniques performed for validation, calibration and standardization. The target pesticides are widely used for the treatment of citrus fruits and pineapples, but for soft drink products, there are still no clear regulations on pesticide residues limits. The matrix effects in the analysis of fruit drinks required implementation of the exact standard reference material corresponds to the variety of food matrices. This paper contributed to the broad analytical implementation of the UV-MALDI-Orbitrap-MS method in the quality control and assessment programs for monitoring of pesticide contamination in fruit based sodas.
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Affiliation(s)
- Bojidarka Ivanova
- Lehrstuhl für Analytische Chemie, Institut für Umweltforschung, Fakultät für Chemie, Universität Dortmund, Otto-Hahn-Strasse 6, 44227 Dortmund, Nordrhein-Westfalen, Germany.
| | - Michael Spiteller
- Lehrstuhl für Analytische Chemie, Institut für Umweltforschung, Fakultät für Chemie, Universität Dortmund, Otto-Hahn-Strasse 6, 44227 Dortmund, Nordrhein-Westfalen, Germany
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Brea O, Yáñez M, Mó O, Lamsabhi AM. On the stability of [(uracil)2-Cu]2+ complexes in the gas phase. Different pathways for the formation of [(uracil-H)(uracil)-Cu]+ monocations. Org Biomol Chem 2013; 11:3862-70. [DOI: 10.1039/c3ob40450a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Ali OY, Randell NM, Fridgen TD. Primary Fragmentation Pathways of Gas Phase [M(Uracil−H)(Uracil)]+ Complexes (M=Zn, Cu, Ni, Co, Fe, Mn, Cd, Pd , Mg, Ca, Sr, Ba, and Pb): Loss of Uracil versus HNCO. Chemphyschem 2012; 13:1507-13. [DOI: 10.1002/cphc.201200015] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Revised: 02/07/2012] [Indexed: 11/07/2022]
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18
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Burt MB, Fridgen TD. Structures and physical properties of gaseous metal cationized biological ions. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2012; 18:235-250. [PMID: 22641728 DOI: 10.1255/ejms.1177] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Metal chelation can alter the activity of free biomolecules by modifying their structures or stabilizing higher energy tautomers. In recent years, mass spectrometric techniques have been used to investigate the effects of metal complexation with proteins, nucleobases and nucleotides, where small conformational changes can have significant physiological consequences. In particular, infrared multiple photon dissociation spectroscopy has emerged as an important tool for determining the structure and reactivity of gas-phase ions. Unlike other mass spectrometric approaches, this method is able to directly resolve structural isomers using characteristic vibrational signatures. Other activation and dissociation methods, such as blackbody infrared radiative dissociation or collision-induced dissociation can also reveal information about the thermochemistry and dissociative pathways of these biological ions. This information can then be used to provide information about the structures of the ionic complexes under study. In this article, we review the use of gas-phase techniques in characterizing metal-bound biomolecules. Particular attention will be given to our own contributions, which detail the ability of metal cations to disrupt nucleobase pairs, direct the self-assembly of nucleobase clusters and stabilize non-canonical isomers of amino acids.
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Affiliation(s)
- Michael B Burt
- Department of Chemistry, Memorial University of Newfoundland, St John's, Newfoundland and Labrador, Canada, A1B 3X7
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