1
|
Nicolardi S, Joseph AA, Zhu Q, Shen Z, Pardo-Vargas A, Chiodo F, Molinaro A, Silipo A, van der Burgt YEM, Yu B, Seeberger PH, Wuhrer M. Analysis of Synthetic Monodisperse Polysaccharides by Wide Mass Range Ultrahigh-Resolution MALDI Mass Spectrometry. Anal Chem 2021; 93:4666-4675. [PMID: 33667082 PMCID: PMC8034773 DOI: 10.1021/acs.analchem.1c00239] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 02/19/2021] [Indexed: 12/13/2022]
Abstract
Carbohydrates, such as oligo- and polysaccharides, are highly abundant biopolymers that are involved in numerous processes. The study of their structure and functions is commonly based on a material that is isolated from complex natural sources. However, a more precise analysis requires pure compounds with well-defined structures that can be obtained from chemical or enzymatic syntheses. Novel synthetic strategies have increased the accessibility of larger monodisperse polysaccharides, posing a challenge to the analytical methods used for their molecular characterization. Here, we present wide mass range ultrahigh-resolution matrix-assisted laser desorption/ionization (MALDI) Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry (MS) as a powerful platform for the analysis of synthetic oligo- and polysaccharides. Synthetic carbohydrates 16-, 64-, 100-, and 151-mers were mass analyzed and characterized by MALDI in-source decay FT-ICR MS. Detection of fragment ions generated from glycosidic bond cleavage (or cross-ring cleavage) provided information of the monosaccharide content and the linkage type, allowing for the corroboration of the carbohydrate compositions and structures.
Collapse
Affiliation(s)
- Simone Nicolardi
- Center
for Proteomics and Metabolomics, Leiden
University Medical Center, Leiden 2333 ZA, The Netherlands
| | - A. Abragam Joseph
- Department
of Biomolecular Systems, Max-Planck-Institute
of Colloids and Interfaces, 14476 Potsdam, Germany
| | - Qian Zhu
- State
Key Laboratory of Bioorganic and Natural Products Chemistry, Center
for Excellence in Molecular Synthesis, Shanghai Institute of Organic
Chemistry, University of Chinese Academy
of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Zhengnan Shen
- School
of Physical Science and Technology, ShanghaiTech
University, 393 Huaxia Middle Road, Shanghai 201210, China
| | - Alonso Pardo-Vargas
- Department
of Biomolecular Systems, Max-Planck-Institute
of Colloids and Interfaces, 14476 Potsdam, Germany
- Institute
of Chemistry and Biochemistry, Freie Universität
Berlin, Arnimallee 22, Berlin 14195, Germany
| | - Fabrizio Chiodo
- Institute
of Biomolecular Chemistry (ICB), Italian
National Research Council (CNR), Via Campi Flegrei, 34, Pozzuoli, Napoli 80078, Italy
- Amsterdam
UMC-Locatie VUMC, Molecular Cell Biology and Immunology, De Boelelaan 1108, Amsterdam 1081 HZ, The Netherlands
| | - Antonio Molinaro
- Department
of Chemical Sciences, University of Naples
Federico II, Via Cintia 4, Napoli 80126, Italy
| | - Alba Silipo
- Department
of Chemical Sciences, University of Naples
Federico II, Via Cintia 4, Napoli 80126, Italy
| | - Yuri E. M. van der Burgt
- Center
for Proteomics and Metabolomics, Leiden
University Medical Center, Leiden 2333 ZA, The Netherlands
| | - Biao Yu
- State
Key Laboratory of Bioorganic and Natural Products Chemistry, Center
for Excellence in Molecular Synthesis, Shanghai Institute of Organic
Chemistry, University of Chinese Academy
of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- School
of Chemistry and Materials Science, Hangzhou Institute for Advanced
Study, University of Chinese Academy of
Sciences, 1 Sub-lane
Xiangshan, Hangzhou 310024, China
| | - Peter H. Seeberger
- Department
of Biomolecular Systems, Max-Planck-Institute
of Colloids and Interfaces, 14476 Potsdam, Germany
- Institute
of Chemistry and Biochemistry, Freie Universität
Berlin, Arnimallee 22, Berlin 14195, Germany
| | - Manfred Wuhrer
- Center
for Proteomics and Metabolomics, Leiden
University Medical Center, Leiden 2333 ZA, The Netherlands
| |
Collapse
|
2
|
Zheng X, Qin Y, Meng X, Jin Z, Fan L, Wang J. Synthesis of polyethylene glycol functional bonded silica gel for selective recognition and separation of α-cyclodextrin. J Chromatogr A 2021; 1639:461917. [PMID: 33524932 DOI: 10.1016/j.chroma.2021.461917] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 01/11/2021] [Accepted: 01/15/2021] [Indexed: 11/25/2022]
Abstract
In this work, we for the first time synthesized the polyethylene glycol (PEG) bonded silica gel via KH-560 as a silane coupling reagent for column chromatography by a solid/liquid surface continuous reaction method. The molecular interaction, structure, morphology, and thermostability was characterized by fourier transform infrared spectroscopy (FTIR), elemental analysis (EA), scanning electronic microscope (SEM) and thermogravimetric analysis (TGA). Given that PEG is capable to self-assemble with α-CD, the PEG bonded silica gel was used as packing of column chromatography to achieve the selective separation of α-cyclodextrin (α-CD) at room temperature and atmospheric pressure. The bonded silica gel column could realize the effective separation of α-CD in the enzymatic hydrolysis mixture, which provides support for industrial separation of α-CD.
Collapse
Affiliation(s)
- Xinying Zheng
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province, 214122, China; Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu Province, 214122, China
| | - Yang Qin
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province, 214122, China; Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu Province, 214122, China
| | - Xiaobing Meng
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province, 214122, China; Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu Province, 214122, China
| | - Zhengyu Jin
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province, 214122, China; Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu Province, 214122, China
| | - Liuping Fan
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province, 214122, China; Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu Province, 214122, China
| | - Jinpeng Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province, 214122, China; Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, Jiangsu Province, 214122, China.
| |
Collapse
|
3
|
Chizhov AO, Tsvetkov YE, Nifantiev NE. Gas-Phase Fragmentation of Cyclic Oligosaccharides in Tandem Mass Spectrometry. Molecules 2019; 24:molecules24122226. [PMID: 31207901 PMCID: PMC6631135 DOI: 10.3390/molecules24122226] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 06/03/2019] [Accepted: 06/11/2019] [Indexed: 01/05/2023] Open
Abstract
Modern mass spectrometry, including electrospray and MALDI, is applied for analysis and structure elucidation of carbohydrates. Cyclic oligosaccharides isolated from different sources (bacteria and plants) have been known for decades and some of them (cyclodextrins and their derivatives) are widely used in drug design, as food additives, in the construction of nanomaterials, etc. The peculiarities of the first- and second-order mass spectra of cyclic oligosaccharides (natural, synthetic and their derivatives and modifications: cyclodextrins, cycloglucans, cyclofructans, cyclooligoglucosamines, etc.) are discussed in this minireview.
Collapse
Affiliation(s)
- Alexander O Chizhov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Science, Leninskii Prosp., 47, 119991 Moscow, Russia.
| | - Yury E Tsvetkov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Science, Leninskii Prosp., 47, 119991 Moscow, Russia.
| | - Nikolay E Nifantiev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Science, Leninskii Prosp., 47, 119991 Moscow, Russia.
| |
Collapse
|
4
|
Liu X, Wesdemiotis C. Electron transfer dissociation of doubly charged ions with different cationizing agents. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2015; 21:713-723. [PMID: 26579927 DOI: 10.1255/ejms.1393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Electron transfer dissociation (ETD) studies have been performed on a peptide and a synthetic polysaccharide doubly charged by different cationization agents. The ETD of protonated-sodiated bombesin gave rise to contiguous series of abundant c- and z-type ions that identified the complete sequence. ETD of the doubly protonated peptide produced a different fragment distribution, which also allowed for complete sequence coverage, but the relative intensities of some sequence ions were very small. Collisionally activated dissociation (CAD) of either precursor rendered limited sequence information. ETD of the sodiated-ammoniated pentamer of a starch-derived linear polysaccharide caused extensive fragmentation through cross-ring cleavages that revealed the possible position of a hydroxyethyl substituent on the saccharide ring. In contrast, ETD of the di-sodiated pentasaccharide did not produce a structure-revealing fragmentation pattern. On the other hand, CAD resulted in efficient glycosidic bond cleavages, either directly (from the sodiated-ammoniated precursor) or via multi-stage fragmentation (from the di-sodiated precursor), which indicated that hydroxyethylation occurs randomly at any saccharide repeat unit along the chain. Overall, the use of different cationizing agents complements the information available by using identical charge sites and opens or enhances ETD pathways that unveil valuable sequence or positional information.
Collapse
Affiliation(s)
- Xiumin Liu
- Department of Chemistry, The University of Akron, Akron, OH 44325, USA. Current address: Covance Inc., 3301 Kinsman Blvd., Madison, WI 53704, USA.
| | - Chrys Wesdemiotis
- Department of Chemistry, The University of Akron, Akron, OH 44325, USA.
| |
Collapse
|
5
|
Zaikin VG, Borisov RS, Polovkov NY, Zhilyaev DI, Vinogradov AA, Ivanyuk AV. Characterization of low-molecular weight iodine-terminated polyethylenes by gas chromatography/mass spectrometry and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry with the use of derivatization. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2013; 19:163-173. [PMID: 24308197 DOI: 10.1255/ejms.1223] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Gas chromatography/mass spectrometry (GC/MS) and matrix-assisted laser desorption/ionization time-of-flight (MALDI-ToF) mass spectrometry, in conjunction with various derivatization approaches, have been applied to structure determination of individual oligomers and molecular-mass distributions (MMD) in low-molecular mass polyethylene having an iodine terminus. Direct GC/MS analysis has shown that the samples under investigation composed of polyethyelene-iodides (major components) and n-alkanes. Exchange reaction with methanol in the presence of NaOH gave rise to methoxy-derivatives and n-alkenes. Electron ionization mass spectra have shown that the former contained terminal methoxy groups indicating the terminal position of the iodine atom in the initial oligomers. MMD parameters have been determined with the aid of MALDI mass spectrometry followed by preliminary derivatization-formation of covalently bonded charge through the reaction of iodides with triphenylphosphine, trialkylamines, pyridine or quinoline. The mass spectra revealed well-resolved peaks for cationic parts of derivatized oligomers allowing the determination of MMD. The latter values have been compared with those calculated from GC/MS data.
Collapse
Affiliation(s)
- Vladimir G Zaikin
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky prospect 29, 119991 Moscow, Russian Federation.
| | | | | | | | | | | |
Collapse
|
6
|
Smargiasso N, Quinton L, De Pauw E. 2-Aminobenzamide and 2-aminobenzoic acid as new MALDI matrices inducing radical mediated in-source decay of peptides and proteins. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2012; 23:469-474. [PMID: 22183958 DOI: 10.1007/s13361-011-0307-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Revised: 11/25/2011] [Accepted: 11/28/2011] [Indexed: 05/31/2023]
Abstract
One of the mechanisms leading to MALDI in-source decay (MALDI ISD) is the transfer of hydrogen radicals to analytes upon laser irradiation. Analytes such as peptides or proteins may undergo ISD and this method can therefore be exploited for top-down sequencing. When performed on peptides, radical-induced ISD results in production of c- and z-ions, as also found in ETD and ECD activation. Here, we describe two new compounds which, when used as MALDI matrices, are able to efficiently induce ISD of peptides and proteins: 2-aminobenzamide and 2-aminobenzoic acid. In-source reduction of the disulfide bridge containing peptide Calcitonin further confirmed the radicalar mechanism of the ISD process. ISD of peptides led, in addition to c- and z-ions, to the generation of a-, x-, and y-ions both in positive and in negative ion modes. Finally, good sequence coverage was obtained for the sequencing of myoglobin (17 kDa protein), confirming the effectiveness of both 2-aminobenzamide and 2-aminobenzoic acid as MALDI ISD matrices.
Collapse
Affiliation(s)
- Nicolas Smargiasso
- Mass Spectrometry Laboratory, GIGA-Research, University of Liege, Allee de la Chimie, 3, BAT B6c, 4000, Liege, Belgium.
| | | | | |
Collapse
|
7
|
Debois D, Smargiasso N, Demeure K, Asakawa D, Zimmerman TA, Quinton L, De Pauw E. MALDI in-source decay, from sequencing to imaging. Top Curr Chem (Cham) 2012; 331:117-41. [PMID: 22976457 DOI: 10.1007/128_2012_363] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Matrix-assisted laser desorption/ionization (MALDI) is now a mature method allowing the identification and, more challenging, the quantification of biopolymers (proteins, nucleic acids, glycans, etc). MALDI spectra show mostly intact singly charged ions. To obtain fragments, the activation of singly charged precursors is necessary, but not efficient above 3.5 kDa, thus making MALDI MS/MS difficult for large species. In-source decay (ISD) is a prompt fragmentation reaction that can be induced thermally or by radicals. As fragments are formed in the source, precursor ions cannot be selected; however, the technique is not limited by the mass of the analyzed compounds and pseudo MS3 can be performed on intense fragments. The discovery of new matrices that enhance the ISD yield, combined with the high sensitivity of MALDI mass spectrometers, and software development, opens new perspectives. We first review the mechanisms involved in the ISD processes, then discuss ISD applications like top-down sequencing and post-translational modifications (PTMs) studies, and finally review MALDI-ISD tissue imaging applications.
Collapse
Affiliation(s)
- Delphine Debois
- Mass Spectrometry Laboratory, GIGA-R, Department of Chemistry, University of Liège, Allée de la Chimie 3, 4000, Liège, Belgium
| | | | | | | | | | | | | |
Collapse
|
8
|
Yang H, Yu Y, Song F, Liu S. Structural characterization of neutral oligosaccharides by laser-enhanced in-source decay of MALDI-FTICR MS. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2011; 22:845-855. [PMID: 21472519 DOI: 10.1007/s13361-011-0085-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2010] [Revised: 01/09/2011] [Accepted: 01/13/2011] [Indexed: 05/30/2023]
Abstract
MALDI in-source decay (ISD) technique described to date has proven to be a convenient and rapid method for sequencing purified peptides and proteins. However, the general ISD still can not produce adequate fragments for the detailed structural elucidation of oligosaccharides. In this study, an efficient and practical method termed the laser-enhanced ISD (LEISD) technique of MALDI-FTICR MS allows highly reliable and abundant fragmentation of the neutral oligosaccharides, which was attributed to the ultrahigh irradiation laser of mJ level. The yield of ISD fragmentation was evaluated under different laser powers for 7 neutral oligosaccharides using DHB as matrix. Better quality ISD spectra including fragment ions in low-mass region were obtained at higher laser power. Results from the LEISD of oligosaccharides demonstrated that a significantly better signal-to-noise ratio (S/N) and more structural information could be obtained in comparison to the conventional CID. It was also suggested that the valuable A ions derived from cross-ring cleavage of the linear oligosaccharides allowed the distinction among α(1→4)-, α(1→6)-, β(1→4)-, and β(1→3)-linked isobaric structures according to fragment types and intensities. In addition, ideal fragmentation ions observed by LEISD method facilitated the determination of the sequences and branched points of complex oligosaccharides from human milk.
Collapse
Affiliation(s)
- Hongmei Yang
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, China
| | | | | | | |
Collapse
|
9
|
Smargiasso N, De Pauw E. Optimization of Matrix Conditions for the Control of MALDI In-Source Decay of Permethylated Glycans. Anal Chem 2010; 82:9248-53. [DOI: 10.1021/ac1017452] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicolas Smargiasso
- Mass Spectrometry Laboratory, GIGA-Research, University of Liege, 4000, Liege, Belgium
| | - Edwin De Pauw
- Mass Spectrometry Laboratory, GIGA-Research, University of Liege, 4000, Liege, Belgium
| |
Collapse
|
10
|
Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: An update for 2003-2004. MASS SPECTROMETRY REVIEWS 2009; 28:273-361. [PMID: 18825656 PMCID: PMC7168468 DOI: 10.1002/mas.20192] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2008] [Revised: 07/07/2008] [Accepted: 07/07/2008] [Indexed: 05/13/2023]
Abstract
This review is the third update of the original review, published in 1999, on the application of matrix-assisted laser desorption/ionization (MALDI) mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings the topic to the end of 2004. Both fundamental studies and applications are covered. The main topics include methodological developments, matrices, fragmentation of carbohydrates and applications to large polymeric carbohydrates from plants, glycans from glycoproteins and those from various glycolipids. Other topics include the use of MALDI MS to study enzymes related to carbohydrate biosynthesis and degradation, its use in industrial processes, particularly biopharmaceuticals and its use to monitor products of chemical synthesis where glycodendrimers and carbohydrate-protein complexes are highlighted.
Collapse
Affiliation(s)
- David J Harvey
- Department of Biochemistry, Oxford Glycobiology Institute, University of Oxford, Oxford OX1 3QU, UK.
| |
Collapse
|
11
|
Hardouin J. Protein sequence information by matrix-assisted laser desorption/ionization in-source decay mass spectrometry. MASS SPECTROMETRY REVIEWS 2007; 26:672-82. [PMID: 17492750 DOI: 10.1002/mas.20142] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Proteins from biological samples are often identified by mass spectrometry (MS) with the two following "bottom-up" approaches: peptide mass fingerprinting or peptide sequence tag. Nevertheless, these strategies are time-consuming (digestion, liquid chromatography step, desalting step), the N- (or C-) terminal information often lacks and post-translational modifications (PTMs) are hardly observed. The in-source decay (ISD) occurring in a matrix assisted laser desorption/ionization (MALDI) source appears an interesting analytical tool to obtain N-terminal sequence, to identify proteins and to characterize PTMs by a "top-down" strategy. The goal of this review deals with the usefulness of the ISD technique in MALDI source in proteomics fields. In the first part, the ISD principle is explained and in the second part, the use of ISD in proteomic studies is discussed for protein identification and sequence characterization.
Collapse
Affiliation(s)
- Julie Hardouin
- Laboratoire de Biochimie des Protéines et Protéomique, Université Paris XIII, UMR CNRS 7033, 74 rue Marcel Cachin, 93 017, Bobigny Cedex, France.
| |
Collapse
|
12
|
Preparation of polysaccharide-coated nanoparticles by emulsion polymerization of styrene. Colloid Polym Sci 2007. [DOI: 10.1007/s00396-006-1579-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
13
|
Drochioiu G, Damoc N, Przybylski M. Novel UV assay for protein determination and the characterization of copper–protein complexes by mass spectrometry. Talanta 2006; 69:556-64. [DOI: 10.1016/j.talanta.2005.10.026] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2005] [Revised: 10/04/2005] [Accepted: 10/25/2005] [Indexed: 11/25/2022]
|
14
|
Frański R, Gierczyk B, Schroeder G, Beck S, Springer A, Linscheid M. Mass spectrometric decompositions of cationized β-cyclodextrin. Carbohydr Res 2005; 340:1567-72. [PMID: 15878449 DOI: 10.1016/j.carres.2005.03.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2004] [Revised: 03/30/2005] [Accepted: 03/31/2005] [Indexed: 11/22/2022]
Abstract
The mass spectrometric decompositions of beta-cyclodextrin (beta-CD) complexed with a number of common divalent metal cations (Mg, Ca, Cd, Cu, Co and Pb), obtained under electrospray ionization conditions, are reported. The main fragmentation pathways of [beta-CD+Cat](2+) ions studied (Cat stands for divalent cation) consist of consecutive losses of sugar units. The rupture of C-C bond in sugar units, which occurs via hydrogen atom transfer from the fragment ion formed to the eliminated species, was also observed. Isotope labelling consisting of the exchange of all hydroxyl hydrogens for deuteriums, has been applied in order to understand better the formation of fragment ions. It was found that C-H hydrogen transfer proceeds only during fragmentation across C-C bonds.
Collapse
Affiliation(s)
- Rafał Frański
- Adam Mickiewicz University, Faculty of Chemistry, Poznań, Poland.
| | | | | | | | | | | |
Collapse
|