1
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Saparbaev E, Zviagin A, Boyarkin OV. Identification of Isomeric Biomolecules by Infrared Spectroscopy of Solvent-Tagged Ions. Anal Chem 2022; 94:9514-9518. [PMID: 35759744 DOI: 10.1021/acs.analchem.2c01612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The difference in functionality of many isomeric biomolecules requires their analytical identification for life science studies. We present a universal approach for quantitative identification of different small- to medium-sized isomeric biomolecules that can be brought to the gas phase from solution by electrospray ionization (ESI). The method involves infrared (IR) fragment cold ion spectroscopy of analyte molecules that are incompletely desolvated by soft ESI. The use of solvent molecules as natural tags removes a need for adding to solutions any special compounds, which may interfere with liquid chromatography or mass spectrometric measurements. The tested peptides and especially monosaccharides and lipids exhibit highly isomer-specific IR fragment spectra of such noncovalent complexes, which were produced from water, methanol, acetonitrile, and 2-butanol solutions. The relative concentrations in solution mixtures of, for instance, two isomeric dipeptides can be quantified with the accuracy of 1.6% and 2.9% for the acquisition time of 25 min and, potentially, 5 s, respectively; for three isomeric phospho-octapeptides, the accuracy becomes 4.1% and 11% for 17 min and, potentially, 10 s measurements, respectively.
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Affiliation(s)
- Erik Saparbaev
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Andrei Zviagin
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Oleg V Boyarkin
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
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2
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Heiles S. Advanced tandem mass spectrometry in metabolomics and lipidomics-methods and applications. Anal Bioanal Chem 2021; 413:5927-5948. [PMID: 34142202 PMCID: PMC8440309 DOI: 10.1007/s00216-021-03425-1] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/11/2021] [Accepted: 05/19/2021] [Indexed: 12/11/2022]
Abstract
Metabolomics and lipidomics are new drivers of the omics era as molecular signatures and selected analytes allow phenotypic characterization and serve as biomarkers, respectively. The growing capabilities of untargeted and targeted workflows, which primarily rely on mass spectrometric platforms, enable extensive charting or identification of bioactive metabolites and lipids. Structural annotation of these compounds is key in order to link specific molecular entities to defined biochemical functions or phenotypes. Tandem mass spectrometry (MS), first and foremost collision-induced dissociation (CID), is the method of choice to unveil structural details of metabolites and lipids. But CID fragment ions are often not sufficient to fully characterize analytes. Therefore, recent years have seen a surge in alternative tandem MS methodologies that aim to offer full structural characterization of metabolites and lipids. In this article, principles, capabilities, drawbacks, and first applications of these "advanced tandem mass spectrometry" strategies will be critically reviewed. This includes tandem MS methods that are based on electrons, photons, and ion/molecule, as well as ion/ion reactions, combining tandem MS with concepts from optical spectroscopy and making use of derivatization strategies. In the final sections of this review, the first applications of these methodologies in combination with liquid chromatography or mass spectrometry imaging are highlighted and future perspectives for research in metabolomics and lipidomics are discussed.
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Affiliation(s)
- Sven Heiles
- Institute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Heinrich Buff Ring 17, 35392, Giessen, Germany.
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3
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Lobas AA, Solovyeva EM, Saparbaev E, Gorshkov MV, Boyarkin OV. Accelerating photofragmentation UV Spectroscopy-Mass spectrometry fingerprinting for quantification of isomeric peptides. Talanta 2021; 232:122412. [PMID: 34074402 DOI: 10.1016/j.talanta.2021.122412] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 04/07/2021] [Accepted: 04/08/2021] [Indexed: 02/07/2023]
Abstract
Identification of isomeric biomolecules remains a challenging analytical problem. A recently developed spectroscopic method that combines UV photofragmentation and mass spectrometry for fingerprinting of cold ions (2D UV-MS), has already demonstrated its high performance in the library-based identification and quantification of different types of biomolecular isomers. The practical use of the method has been hindered by a slow rate of data acquisition, which makes the fingerprinting incompatible with high-throughput analysis and online liquid chromatography (LC) separation. Herein we demonstrate how the use of a few pre-selected wavelengths can accelerate the method by two orders of magnitude without a significant loss of accuracy. As a proof of principle, 2D UV-MS fingerprinting was coupled to online LC separation and tested for quantification of isomeric peptides containing either Asp or isoAsp residues. The relative concentrations of the peptides mixed in solution have been determined, on average, with better than 4% and 6% accuracy for resolving and non-resolving gradients of LC separation, respectively.
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Affiliation(s)
- Anna A Lobas
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland; V.L. Talrose Institute for Energy Problems of Chemical Physics, Federal Research Center of Chemical Physics, RAS, Moscow, Russia
| | - Elizaveta M Solovyeva
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland; V.L. Talrose Institute for Energy Problems of Chemical Physics, Federal Research Center of Chemical Physics, RAS, Moscow, Russia; Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Russia
| | - Erik Saparbaev
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland
| | - Mikhail V Gorshkov
- V.L. Talrose Institute for Energy Problems of Chemical Physics, Federal Research Center of Chemical Physics, RAS, Moscow, Russia
| | - Oleg V Boyarkin
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland.
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4
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Saparbaev E, Kopysov V, Aladinskaia V, Ferrieres V, Legentil L, Boyarkin OV. Identification and Quantification of Any Isoforms of Carbohydrates by 2D UV-MS Fingerprinting of Cold Ions. Anal Chem 2020; 92:14624-14632. [PMID: 33138380 DOI: 10.1021/acs.analchem.0c03122] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Biological functionality of isomeric carbohydrates may differ drastically, making their identifications indispensable in many applications of life science. Because of the large number of isoforms, structural assignment of saccharides is challenging and often requires a use of different orthogonal analytical techniques. We demonstrate that isomeric carbohydrates of any isoforms can be distinguished and quantified using solely the library-based method of 2D ultraviolet fragmentation spectroscopy-mass spectrometry (2D UV-MS) of cold ions. The two-dimensional "fingerprint" identities of UV transparent saccharides were revealed by photofragmentation of their noncovalent complexes with aromatic molecules. We assess the accuracy of the method by comparing the known relative concentrations of isomeric carbohydrates mixed in solution with the concentrations that were mathematically determined from the measured in the gas-phase fingerprints of the complexes. For the tested sets with up to five isomers of di- to heptasaccharides, the root-mean-square deviation of 3-5% was typically achieved. This indicates the expected level of accuracy in analysis of unknown mixtures for isomeric carbohydrates of similar complexity.
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Affiliation(s)
- Erik Saparbaev
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, Station-6, 1015 Lausanne, Switzerland
| | - Vladimir Kopysov
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, Station-6, 1015 Lausanne, Switzerland
| | - Viktoriia Aladinskaia
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, Station-6, 1015 Lausanne, Switzerland
| | - Vincent Ferrieres
- Université de Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR 6226, F-35000 Rennes, France
| | - Laurent Legentil
- Université de Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR 6226, F-35000 Rennes, France
| | - Oleg V Boyarkin
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, Station-6, 1015 Lausanne, Switzerland
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5
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Kranenburg RF, van Geenen FAMG, Berden G, Oomens J, Martens J, van Asten AC. Mass-Spectrometry-Based Identification of Synthetic Drug Isomers Using Infrared Ion Spectroscopy. Anal Chem 2020; 92:7282-7288. [PMID: 32286052 PMCID: PMC7240807 DOI: 10.1021/acs.analchem.0c00915] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 04/14/2020] [Indexed: 12/13/2022]
Abstract
Infrared ion spectroscopy (IRIS), a mass-spectrometry-based technique exploiting resonant infrared multiple photon dissociation (IRMPD), has been applied for the identification of novel psychoactive substances (NPS). Identification of the precise isomeric forms of NPS is of significant forensic relevance since legal controls are dependent on even minor molecular differences such as a single ring-substituent position. Using three isomers of fluoroamphetamine and two ring-isomers of both MDA and MDMA, we demonstrate the ability of IRIS to distinguish closely related NPS. Computationally predicted infrared (IR) spectra are shown to correspond with experimental spectra and could explain the molecular origins of their distinctive IR absorption bands. IRIS was then used to investigate a confiscated street sample containing two unknown substances. One substance could easily be identified by comparison to the IR spectra of reference standards. For the other substance, however, this approach proved inconclusive due to incomplete mass spectral databases as well as a lack of available reference compounds, two common analytical limitations resulting from the rapid development of NPS. Most excitingly, the second unknown substance could nevertheless be identified by using computationally predicted IR spectra of several potential candidate structures instead of their experimental reference spectra.
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Affiliation(s)
- Ruben F. Kranenburg
- Unit
Amsterdam, Forensic Laboratory, Dutch National
Police, Kabelweg 25, Amsterdam 1014 BA, The Netherlands
- Van’t
Hoff Institute for Molecular Sciences, University
of Amsterdam, P.O. Box 94157, Amsterdam 1090 GD, The
Netherlands
| | - Fred A. M. G. van Geenen
- Institute
for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, Nijmegen 6525 ED, The Netherlands
| | - Giel Berden
- Institute
for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, Nijmegen 6525 ED, The Netherlands
| | - Jos Oomens
- Van’t
Hoff Institute for Molecular Sciences, University
of Amsterdam, P.O. Box 94157, Amsterdam 1090 GD, The
Netherlands
- Institute
for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, Nijmegen 6525 ED, The Netherlands
| | - Jonathan Martens
- Institute
for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, Nijmegen 6525 ED, The Netherlands
| | - Arian C. van Asten
- Van’t
Hoff Institute for Molecular Sciences, University
of Amsterdam, P.O. Box 94157, Amsterdam 1090 GD, The
Netherlands
- Co
van Ledden Hulsebosch Center (CLHC), Amsterdam Center for Forensic
Science and Medicine, P.O. Box 94157, Amsterdam 1090 GD, The
Netherlands
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6
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Martens J, van Outersterp RE, Vreeken RJ, Cuyckens F, Coene KLM, Engelke UF, Kluijtmans LAJ, Wevers RA, Buydens LMC, Redlich B, Berden G, Oomens J. Infrared ion spectroscopy: New opportunities for small-molecule identification in mass spectrometry - A tutorial perspective. Anal Chim Acta 2019; 1093:1-15. [PMID: 31735202 DOI: 10.1016/j.aca.2019.10.043] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 10/19/2019] [Accepted: 10/21/2019] [Indexed: 01/21/2023]
Abstract
Combining the individual analytical strengths of mass spectrometry and infrared spectroscopy, infrared ion spectroscopy is increasingly recognized as a powerful tool for small-molecule identification in a wide range of analytical applications. Mass spectrometry is itself a leading analytical technique for small-molecule identification on the merit of its outstanding sensitivity, selectivity and versatility. The foremost shortcoming of the technique, however, is its limited ability to directly probe molecular structure, especially when contrasted against spectroscopic techniques. In infrared ion spectroscopy, infrared vibrational spectra are recorded for mass-isolated ions and provide a signature that can be matched to reference spectra, either measured from standards or predicted using quantum-chemical calculations. Here we present an overview of the potential for this technique to develop into a versatile analytical method for identifying molecular structures in mass spectrometry-based analytical workflows. In this tutorial perspective, we introduce the reader to the technique of infrared ion spectroscopy and highlight a selection of recent experimental advances and applications in current analytical challenges, in particular in the field of untargeted metabolomics. We report on the coupling of infrared ion spectroscopy with liquid chromatography and present experiments that serve as proof-of-principle examples of strategies to address outstanding challenges.
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Affiliation(s)
- Jonathan Martens
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525 ED, Nijmegen, the Netherlands.
| | - Rianne E van Outersterp
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525 ED, Nijmegen, the Netherlands
| | - Rob J Vreeken
- Drug Metabolism & Pharmacokinetics, Janssen R&D, Beerse, Belgium
| | - Filip Cuyckens
- Drug Metabolism & Pharmacokinetics, Janssen R&D, Beerse, Belgium
| | - Karlien L M Coene
- Department of Laboratory Medicine, Translational Metabolic Laboratory, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Udo F Engelke
- Department of Laboratory Medicine, Translational Metabolic Laboratory, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Leo A J Kluijtmans
- Department of Laboratory Medicine, Translational Metabolic Laboratory, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Ron A Wevers
- Department of Laboratory Medicine, Translational Metabolic Laboratory, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Lutgarde M C Buydens
- Radboud University, Institute for Molecules and Materials, Chemometrics, Heyendaalseweg 135, 6525AJ, Nijmegen, the Netherlands
| | - Britta Redlich
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525 ED, Nijmegen, the Netherlands
| | - Giel Berden
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525 ED, Nijmegen, the Netherlands
| | - Jos Oomens
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525 ED, Nijmegen, the Netherlands; van't Hoff Institute for Molecular Sciences, University of Amsterdam, 1098XH, Amsterdam, Science Park 908, the Netherlands.
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7
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Saparbaev E, Kopysov V, Yamaletdinov R, Pereverzev AY, Boyarkin OV. Interplay of H‐Bonds with Aromatics in Isolated Complexes Identifies Isomeric Carbohydrates. Angew Chem Int Ed Engl 2019; 58:7346-7350. [DOI: 10.1002/anie.201902377] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 03/20/2019] [Indexed: 02/06/2023]
Affiliation(s)
- Erik Saparbaev
- Laboratoire de Chimie Physique MoléculaireÉcole Polytechnique Fédérale de Lausanne 1015 Lausanne Switzerland
| | - Vladimir Kopysov
- Laboratoire de Chimie Physique MoléculaireÉcole Polytechnique Fédérale de Lausanne 1015 Lausanne Switzerland
| | - Ruslan Yamaletdinov
- Nikolaev Institute of Inorganic Chemistry Novosibirsk 630090 Russian Federation
| | - Aleksandr Y. Pereverzev
- Laboratoire de Chimie Physique MoléculaireÉcole Polytechnique Fédérale de Lausanne 1015 Lausanne Switzerland
| | - Oleg V. Boyarkin
- Laboratoire de Chimie Physique MoléculaireÉcole Polytechnique Fédérale de Lausanne 1015 Lausanne Switzerland
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8
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Solovyeva EM, Kopysov VN, Pereverzev AY, Lobas AA, Moshkovskii SA, Gorshkov MV, Boyarkin OV. Method for Identification of Threonine Isoforms in Peptides by Ultraviolet Photofragmentation of Cold Ions. Anal Chem 2019; 91:6709-6715. [DOI: 10.1021/acs.analchem.9b00770] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Elizaveta M. Solovyeva
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, Station-6, 1015 Lausanne, Switzerland
- Moscow Institute of Physics and Technology (State University), 9 Institutskiy per., Dolgoprudny, Moscow Region, 141701, Russia
- V.L. Talrose Institute for Energy Problems of Chemical Physics, Russian Academy of Sciences, 38 Leninsky Pr., Bld.2 Moscow, 119334, Russia
| | - Vladimir N. Kopysov
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, Station-6, 1015 Lausanne, Switzerland
| | - Aleksandr Y. Pereverzev
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, Station-6, 1015 Lausanne, Switzerland
| | - Anna A. Lobas
- V.L. Talrose Institute for Energy Problems of Chemical Physics, Russian Academy of Sciences, 38 Leninsky Pr., Bld.2 Moscow, 119334, Russia
| | | | - Mikhail V. Gorshkov
- V.L. Talrose Institute for Energy Problems of Chemical Physics, Russian Academy of Sciences, 38 Leninsky Pr., Bld.2 Moscow, 119334, Russia
| | - Oleg V. Boyarkin
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, Station-6, 1015 Lausanne, Switzerland
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9
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Saparbaev E, Kopysov V, Yamaletdinov R, Pereverzev AY, Boyarkin OV. Interplay of H‐Bonds with Aromatics in Isolated Complexes Identifies Isomeric Carbohydrates. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902377] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Erik Saparbaev
- Laboratoire de Chimie Physique MoléculaireÉcole Polytechnique Fédérale de Lausanne 1015 Lausanne Switzerland
| | - Vladimir Kopysov
- Laboratoire de Chimie Physique MoléculaireÉcole Polytechnique Fédérale de Lausanne 1015 Lausanne Switzerland
| | - Ruslan Yamaletdinov
- Nikolaev Institute of Inorganic Chemistry Novosibirsk 630090 Russian Federation
| | - Aleksandr Y. Pereverzev
- Laboratoire de Chimie Physique MoléculaireÉcole Polytechnique Fédérale de Lausanne 1015 Lausanne Switzerland
| | - Oleg V. Boyarkin
- Laboratoire de Chimie Physique MoléculaireÉcole Polytechnique Fédérale de Lausanne 1015 Lausanne Switzerland
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10
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Affiliation(s)
- Oleg V. Boyarkin
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
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11
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Deciphering ephedrine inclusion complexes with β-cyclodextrin, 18-crown-6 and cucurbit[7]uril using spectral and molecular modeling methods. J INCL PHENOM MACRO 2018. [DOI: 10.1007/s10847-018-0866-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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12
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Tesler LF, Cismesia AP, Bell MR, Bailey LS, Polfer NC. Operation and Performance of a Mass-Selective Cryogenic Linear Ion Trap. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2018; 29:2115-2124. [PMID: 30062479 PMCID: PMC6301008 DOI: 10.1007/s13361-018-2026-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 06/26/2018] [Accepted: 06/27/2018] [Indexed: 06/08/2023]
Abstract
We report on the performance of a cryogenic 2D linear ion trap (cryoLIT) that is shown to be mass-selective in the temperature range of 17-295 K. As the cryoLIT is cooled, the ejection voltages during the mass instability scan decrease, which results in an effective mass shift to lower m/z relative to room temperature. This is attributed to a decrease in trap radius caused by thermal contraction. Additionally, the cryoLIT generates reproducible mass spectra from day-to-day, and is capable of performing stored waveform inverse Fourier transform (SWIFT) mass isolation of fragile N2-tagged ions for the purpose of background-free infrared dissociation spectroscopy. Graphical Abstract ᅟ.
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Affiliation(s)
- Larry F Tesler
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL, 32611-7200, USA
| | - Adam P Cismesia
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL, 32611-7200, USA
| | - Matthew R Bell
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL, 32611-7200, USA
| | - Laura S Bailey
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL, 32611-7200, USA
| | - Nicolas C Polfer
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL, 32611-7200, USA.
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13
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Cismesia AP, Bell MR, Tesler LF, Alves M, Polfer NC. Infrared ion spectroscopy: an analytical tool for the study of metabolites. Analyst 2018; 143:1615-1623. [PMID: 29497730 PMCID: PMC6186386 DOI: 10.1039/c8an00087e] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Vibrational ion spectroscopy techniques coupled with mass spectrometry are applied to standard metabolites as a proof-of-principle demonstration for the structural identification of unknown metabolites. The traditional room temperature infrared multiple photon dissociation (IRMPD) spectroscopy technique is shown to differentiate chemical moieties in isobaric and isomeric variants. These results are compared to infrared spectra of cryogenically cooled analyte ions, showing enhanced spectral resolution, and thus also improved differentiation between closely related molecules, such as isomers. The cryogenic spectroscopy is effected in a recently developed mass-selective cryogenic linear ion trap, which is capable of high sensitivity and the ability to measure the IR spectra of multiple analytes simultaneously.
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Affiliation(s)
- Adam P Cismesia
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL 32611-7200, USA.
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14
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Kopysov V, Gorshkov MV, Boyarkin OV. Identification of isoforms of aspartic acid residues in peptides by 2D UV-MS fingerprinting of cold ions. Analyst 2018; 143:833-836. [DOI: 10.1039/c7an02044a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We use 2D UV-MS cold-ion spectroscopy for the identification of l-Asp, d-Asp, l-isoAsp and d-isoAsp residues in a fragment peptide derived from the hormone protein amylin.
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Affiliation(s)
- Vladimir Kopysov
- Laboratoire de Chimie Physique Moléculaire
- École Polytechnique Fédérale de Lausanne
- CH-1015 Lausanne
- Switzerland
| | - Mikhail V. Gorshkov
- V. L. Talroze
- Institute of Energy Problems of Chemical Physics
- Russian Academy of Sciences
- Moscow
- Russia
| | - Oleg V. Boyarkin
- Laboratoire de Chimie Physique Moléculaire
- École Polytechnique Fédérale de Lausanne
- CH-1015 Lausanne
- Switzerland
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