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Ow SY, Kapp EA, Tomasetig V, Zalewski A, Simmonds J, Panousis C, Wilson MJ, Nash AD, Pelzing M. HDX-MS study on garadacimab binding to activated FXII reveals potential binding interfaces through differential solvent exposure. MAbs 2023; 15:2163459. [PMID: 36628468 PMCID: PMC9839371 DOI: 10.1080/19420862.2022.2163459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Hageman factor (FXII) is an essential component in the intrinsic coagulation cascade and a therapeutic target for the prophylactic treatment of hereditary angioedema (HAE). CSL312 (garadacimab) is a novel high-affinity human antibody capable of blocking activated FXII activity that is currently undergoing Phase 3 clinical trials in HAE. Structural studies using hydrogen/deuterium exchange coupled to mass spectrometry revealed evidence of interaction between the antibody and regions surrounding the S1 specificity pocket of FXII, including the 99-loop, 140-loop, 180-loop, and neighboring regions. We propose complementarity-determining regions (CDRs) in heavy-chain CDR2 and CDR3 as potential paratopes on garadacimab, and the 99-loop, 140-loop, 180-loop, and 220-loop as binding sites on the beta chain of activated FXII (β-FXIIa).
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Affiliation(s)
- Saw Yen Ow
- Research and Development, CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Australia
| | - Eugene A. Kapp
- Research and Development, CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Australia
| | - Vesna Tomasetig
- Research and Development, CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Australia
| | - Anton Zalewski
- Research and Development, CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Australia
| | - Jason Simmonds
- Research and Development, CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Australia
| | - Con Panousis
- Research and Development, CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Australia
| | - Michael J. Wilson
- Research and Development, CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Australia
| | - Andrew D. Nash
- Research and Development, CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Australia
| | - Matthias Pelzing
- Research and Development, CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Australia,CONTACT Matthias Pelzing CSL Limited, 30 Flemington Road, Parkville, Victoria3010, Australia
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2
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Rigau M, Ostrouska S, Fulford T, Johnson DN, Woods K, Ruan Z, McWilliam H, Hudson C, Tutuka C, Wheatley AK, Kent SJ, Villadangos JA, Pal B, Kurts C, Simmonds J, Pelzing M, Hammet AD, Verhagen AM, Vairo G, Maraskovsky E, Panousis C, Gherardin NA, Cebon J, Godfrey DI, Behren A, Uldrich AP. Butyrophilin molecules govern γδ T cell reactivity against phosphoantigens. The Journal of Immunology 2020. [DOI: 10.4049/jimmunol.204.supp.140.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Humans have a minor lymphocyte population of gamma-delta (γδ) T cells. The majority of these express a recombined Vγ9Vδ2 T cell receptor (TCR) attractive to immunotherapy. This distinct TCR conveys reactivity to phosphorylated antigens (pAg) that derive from pathogens or accumulate inside tumour cells. Such T cell responses are regulated by butyrophilin (BTN) 3A1 and other membrane-related proteins present on antigen-presenting cells. However, the activation mechanism and direct molecular ligand recognised by the γδ TCR remain a crucial unresolved question. Herein, we used pAg-reactive TCR probes in a whole-genome screen to identify BTN2A1 as an essential ligand. In further investigation, we elucidated its functionality working in cis with BTN3A1. Also, a mutational analysis unveiled critical regions of the γδ TCR are positioned at opposite sides. We locate germ-line encoded residues of the Vγ9 chain were responsible for BTN2A1 binding, whereas two amino-acids of the Vδ2 chain were necessary for a complete response to pAg. In conclusion, we propose a dual-ligand complex model that senses pAg to evoke immune responses, wherein BTN2A1 sets the framework to develop new opportunities on γδ T cell-based immunotherapies.
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Affiliation(s)
- Marc Rigau
- 1Univ. of Melbourne, Australia
- 2Univ. of Bonn, Germany
- 3Australian Research Council Centre of Excellence for Advanced Molecular Imaging at the University of Melbourne, Australia
| | - Simone Ostrouska
- 4Olivia Newton-John Cancer Research Institute, Australia
- 5La Trobe University, Sch. of Cancer Medicine, Australia
| | | | | | - Katherine Woods
- 4Olivia Newton-John Cancer Research Institute, Australia
- 5La Trobe University, Sch. of Cancer Medicine, Australia
- 6Ludwig Institute for Cancer Research, Australia
| | | | | | | | - Candani Tutuka
- 4Olivia Newton-John Cancer Research Institute, Australia
- 5La Trobe University, Sch. of Cancer Medicine, Australia
| | - Adam K Wheatley
- 1Univ. of Melbourne, Australia
- 7Australian Research Council Centre of Excellence for Convergent Bio-Nano Science and Technology at the Univ. of Melbourne, Australia
| | - Stephen J Kent
- 1Univ. of Melbourne, Australia
- 7Australian Research Council Centre of Excellence for Convergent Bio-Nano Science and Technology at the Univ. of Melbourne, Australia
| | | | - Bhupinder Pal
- 4Olivia Newton-John Cancer Research Institute, Australia
- 5La Trobe University, Sch. of Cancer Medicine, Australia
| | | | | | | | | | | | | | | | | | | | - Jonathan Cebon
- 4Olivia Newton-John Cancer Research Institute, Australia
- 5La Trobe University, Sch. of Cancer Medicine, Australia
| | - Dale Ian Godfrey
- 1Univ. of Melbourne, Australia
- 3Australian Research Council Centre of Excellence for Advanced Molecular Imaging at the University of Melbourne, Australia
| | - Andreas Behren
- 4Olivia Newton-John Cancer Research Institute, Australia
- 5La Trobe University, Sch. of Cancer Medicine, Australia
- 6Ludwig Institute for Cancer Research, Australia
| | - Adam Peter Uldrich
- 1Univ. of Melbourne, Australia
- 3Australian Research Council Centre of Excellence for Advanced Molecular Imaging at the University of Melbourne, Australia
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3
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Rigau M, Ostrouska S, Fulford TS, Johnson DN, Woods K, Ruan Z, McWilliam HEG, Hudson C, Tutuka C, Wheatley AK, Kent SJ, Villadangos JA, Pal B, Kurts C, Simmonds J, Pelzing M, Nash AD, Hammet A, Verhagen AM, Vairo G, Maraskovsky E, Panousis C, Gherardin NA, Cebon J, Godfrey DI, Behren A, Uldrich AP. Butyrophilin 2A1 is essential for phosphoantigen reactivity by γδ T cells. Science 2020; 367:science.aay5516. [PMID: 31919129 DOI: 10.1126/science.aay5516] [Citation(s) in RCA: 232] [Impact Index Per Article: 58.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 10/14/2019] [Accepted: 12/23/2019] [Indexed: 12/21/2022]
Abstract
Gamma delta (γδ) T cells are essential to protective immunity. In humans, most γδ T cells express Vγ9Vδ2+ T cell receptors (TCRs) that respond to phosphoantigens (pAgs) produced by cellular pathogens and overexpressed by cancers. However, the molecular targets recognized by these γδTCRs are unknown. Here, we identify butyrophilin 2A1 (BTN2A1) as a key ligand that binds to the Vγ9+ TCR γ chain. BTN2A1 associates with another butyrophilin, BTN3A1, and these act together to initiate responses to pAg. Furthermore, binding of a second ligand, possibly BTN3A1, to a separate TCR domain incorporating Vδ2 is also required. This distinctive mode of Ag-dependent T cell activation advances our understanding of diseases involving pAg recognition and creates opportunities for the development of γδ T cell-based immunotherapies.
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Affiliation(s)
- Marc Rigau
- Department of Microbiology and Immunology at the Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia.,University of Bonn, Bonn, Germany.,Australian Research Council Centre of Excellence for Advanced Molecular Imaging at the University of Melbourne, Victoria 3010, Australia
| | - Simone Ostrouska
- Olivia Newton-John Cancer Research Institute, Heidelberg, Victoria 3084, Australia.,School of Cancer Medicine, La Trobe University, Heidelberg, Victoria 3084, Australia
| | - Thomas S Fulford
- Department of Microbiology and Immunology at the Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Darryl N Johnson
- Department of Microbiology and Immunology at the Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia.,Australian Research Council Centre of Excellence for Advanced Molecular Imaging at the University of Melbourne, Victoria 3010, Australia
| | - Katherine Woods
- Olivia Newton-John Cancer Research Institute, Heidelberg, Victoria 3084, Australia.,School of Cancer Medicine, La Trobe University, Heidelberg, Victoria 3084, Australia.,Ludwig Institute for Cancer Research, Melbourne -Austin Branch, Victoria 3084, Australia
| | - Zheng Ruan
- Department of Microbiology and Immunology at the Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia.,Australian Research Council Centre of Excellence for Advanced Molecular Imaging at the University of Melbourne, Victoria 3010, Australia
| | - Hamish E G McWilliam
- Department of Microbiology and Immunology at the Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia.,Department of Biochemistry and Molecular Biology at the Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Christopher Hudson
- Ludwig Institute for Cancer Research, Melbourne -Austin Branch, Victoria 3084, Australia
| | - Candani Tutuka
- Olivia Newton-John Cancer Research Institute, Heidelberg, Victoria 3084, Australia.,School of Cancer Medicine, La Trobe University, Heidelberg, Victoria 3084, Australia
| | - Adam K Wheatley
- Department of Microbiology and Immunology at the Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia.,Australian Research Council Centre of Excellence for Convergent Bio-Nano Science and Technology at the University of Melbourne, Victoria 3010, Australia
| | - Stephen J Kent
- Department of Microbiology and Immunology at the Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia.,Australian Research Council Centre of Excellence for Convergent Bio-Nano Science and Technology at the University of Melbourne, Victoria 3010, Australia
| | - Jose A Villadangos
- Department of Microbiology and Immunology at the Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia.,Department of Biochemistry and Molecular Biology at the Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Bhupinder Pal
- Olivia Newton-John Cancer Research Institute, Heidelberg, Victoria 3084, Australia.,School of Cancer Medicine, La Trobe University, Heidelberg, Victoria 3084, Australia
| | | | - Jason Simmonds
- CSL Limited at the Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Matthias Pelzing
- CSL Limited at the Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Andrew D Nash
- CSL Limited at the Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Andrew Hammet
- CSL Limited at the Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Anne M Verhagen
- CSL Limited at the Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Gino Vairo
- CSL Limited at the Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Eugene Maraskovsky
- CSL Limited at the Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Con Panousis
- CSL Limited at the Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Nicholas A Gherardin
- Department of Microbiology and Immunology at the Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Jonathan Cebon
- Olivia Newton-John Cancer Research Institute, Heidelberg, Victoria 3084, Australia.,School of Cancer Medicine, La Trobe University, Heidelberg, Victoria 3084, Australia.,Ludwig Institute for Cancer Research, Melbourne -Austin Branch, Victoria 3084, Australia.,Department of Medicine, The University of Melbourne, Melbourne, Victoria 3010, Australia.,Austin Health, Heidelberg, Victoria 3084, Australia
| | - Dale I Godfrey
- Department of Microbiology and Immunology at the Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia. .,Australian Research Council Centre of Excellence for Advanced Molecular Imaging at the University of Melbourne, Victoria 3010, Australia
| | - Andreas Behren
- Olivia Newton-John Cancer Research Institute, Heidelberg, Victoria 3084, Australia. .,School of Cancer Medicine, La Trobe University, Heidelberg, Victoria 3084, Australia.,Ludwig Institute for Cancer Research, Melbourne -Austin Branch, Victoria 3084, Australia.,Department of Medicine, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Adam P Uldrich
- Department of Microbiology and Immunology at the Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia. .,Australian Research Council Centre of Excellence for Advanced Molecular Imaging at the University of Melbourne, Victoria 3010, Australia
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4
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Iacobucci C, Piotrowski C, Aebersold R, Amaral BC, Andrews P, Bernfur K, Borchers C, Brodie NI, Bruce JE, Cao Y, Chaignepain S, Chavez JD, Claverol S, Cox J, Davis T, Degliesposti G, Dong MQ, Edinger N, Emanuelsson C, Gay M, Götze M, Gomes-Neto F, Gozzo FC, Gutierrez C, Haupt C, Heck AJR, Herzog F, Huang L, Hoopmann MR, Kalisman N, Klykov O, Kukačka Z, Liu F, MacCoss MJ, Mechtler K, Mesika R, Moritz RL, Nagaraj N, Nesati V, Neves-Ferreira AGC, Ninnis R, Novák P, O'Reilly FJ, Pelzing M, Petrotchenko E, Piersimoni L, Plasencia M, Pukala T, Rand KD, Rappsilber J, Reichmann D, Sailer C, Sarnowski CP, Scheltema RA, Schmidt C, Schriemer DC, Shi Y, Skehel JM, Slavin M, Sobott F, Solis-Mezarino V, Stephanowitz H, Stengel F, Stieger CE, Trabjerg E, Trnka M, Vilaseca M, Viner R, Xiang Y, Yilmaz S, Zelter A, Ziemianowicz D, Leitner A, Sinz A. First Community-Wide, Comparative Cross-Linking Mass Spectrometry Study. Anal Chem 2019; 91:6953-6961. [PMID: 31045356 PMCID: PMC6625963 DOI: 10.1021/acs.analchem.9b00658] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The number of publications in the field of chemical cross-linking combined with mass spectrometry (XL-MS) to derive constraints for protein three-dimensional structure modeling and to probe protein-protein interactions has increased during the last years. As the technique is now becoming routine for in vitro and in vivo applications in proteomics and structural biology there is a pressing need to define protocols as well as data analysis and reporting formats. Such consensus formats should become accepted in the field and be shown to lead to reproducible results. This first, community-based harmonization study on XL-MS is based on the results of 32 groups participating worldwide. The aim of this paper is to summarize the status quo of XL-MS and to compare and evaluate existing cross-linking strategies. Our study therefore builds the framework for establishing best practice guidelines to conduct cross-linking experiments, perform data analysis, and define reporting formats with the ultimate goal of assisting scientists to generate accurate and reproducible XL-MS results.
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Affiliation(s)
- Claudio Iacobucci
- Department of Pharmaceutical Chemistry and Bioanalytics, Institute of Pharmacy, Charles Tanford Protein Center , Martin Luther University Halle-Wittenberg , Kurt-Mothes-Strasse 3a , 06120 Halle/Saale , Germany
| | - Christine Piotrowski
- Department of Pharmaceutical Chemistry and Bioanalytics, Institute of Pharmacy, Charles Tanford Protein Center , Martin Luther University Halle-Wittenberg , Kurt-Mothes-Strasse 3a , 06120 Halle/Saale , Germany
| | - Ruedi Aebersold
- Department of Biology, Institute of Molecular Systems Biology , ETH Zurich , Otto-Stern-Weg 3 , 8093 Zurich , Switzerland.,Faculty of Science , University of Zurich , 8006 Zurich , Switzerland
| | - Bruno C Amaral
- Institute of Chemistry , University of Campinas , Campinas São Paulo 13083-970 , Brazil
| | - Philip Andrews
- Departments of Biological Chemistry, Bioinformatics, and Chemistry , University of Michigan , Ann Arbor , Michigan 48109 , United States
| | - Katja Bernfur
- Department of Biochemistry and Structural Biology, Center for Molecular Protein Science , Lund University , 221 00 Lund , Sweden
| | - Christoph Borchers
- University of Victoria-Genome British Columbia Proteomics Centre , Vancouver Island Technology Park , Victoria , British Columbia V8Z 7X8 , Canada.,Department of Biochemistry and Microbiology , University of Victoria , Petch Building, Room 270d, 3800 Finnerty Road , Victoria , British Columbia V8P 5C2 , Canada.,Gerald Bronfman Department of Oncology, Jewish General Hospital , McGill University , 3755 Côte Ste-Catherine Road , Montréal , Quebec H3T 1E2 , Canada.,Proteomics Centre, Segal Cancer Centre, Lady Davis Institute, Jewish General Hospital , McGill University , 3755 Côte Ste-Catherine Road , Montréal , Quebec H3T 1E2 , Canada
| | - Nicolas I Brodie
- University of Victoria-Genome British Columbia Proteomics Centre , Vancouver Island Technology Park , Victoria , British Columbia V8Z 7X8 , Canada
| | - James E Bruce
- Department of Genome Sciences , University of Washington , Seattle , Washington 98195 , United States
| | - Yong Cao
- National Institute of Biological Sciences , Beijing 7 Science Park Road, ZGC Life Science Park , 102206 Beijing , China
| | - Stéphane Chaignepain
- CBMN, UMR 5248, CNRS , Université de Bordeaux, INP Bordeaux , Pessac 33607 , France
| | - Juan D Chavez
- Department of Genome Sciences , University of Washington , Seattle , Washington 98195 , United States
| | - Stéphane Claverol
- Centre de Génomique Fonctionnelle, Plateforme Protéome , Université de Bordeaux , Bordeaux 33000 , France
| | - Jürgen Cox
- Computational Systems Biochemistry Research Group , Max-Planck-Institute of Biochemistry , Am Klopferspitz 18 , 82152 Martinsried , Germany
| | - Trisha Davis
- Department of Biochemistry , University of Washington , Seattle , Washington 98195 , United States
| | - Gianluca Degliesposti
- MRC Laboratory of Molecular Biology , Cambridge Biomedical Campus , Francis Crick Avenue , Cambridge CB2 0QH , U.K
| | - Meng-Qiu Dong
- National Institute of Biological Sciences , Beijing 7 Science Park Road, ZGC Life Science Park , 102206 Beijing , China
| | - Nufar Edinger
- Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram , The Hebrew University of Jerusalem , Jerusalem 91904 , Israel
| | - Cecilia Emanuelsson
- Department of Biochemistry and Structural Biology, Center for Molecular Protein Science , Lund University , 221 00 Lund , Sweden
| | - Marina Gay
- Institute for Research in Biomedicine (IRB Barcelona) , The Barcelona Institute of Science and Technology (BIST) , Baldiri Reixac 10 , 08028 Barcelona , Spain
| | - Michael Götze
- Institute for Biochemistry and Biotechnology, Charles Tanford Protein Center , Martin Luther University Halle-Wittenberg , Kurt-Mothes-Strasse 3a , 06120 Halle/Saale , Germany
| | - Francisco Gomes-Neto
- Laboratory of Toxinology , Oswaldo Cruz Institute , Fiocruz, Avenida Brasil 4365 (Moorish Castle) , Manguinhos, Rio de Janeiro , Rio de Janeiro 21040-900 , Brazil
| | - Fabio C Gozzo
- Institute of Chemistry , University of Campinas , Campinas São Paulo 13083-970 , Brazil
| | - Craig Gutierrez
- Department of Physiology & Biophysics , University of California , Irvine , California 92697 , United States
| | - Caroline Haupt
- Interdisciplinary Research Center HALOmem, Institute for Biochemistry and Biotechnology, Charles Tanford Protein Center , Martin Luther University Halle-Wittenberg , Kurt-Mothes-Strasse 3a , 06120 Halle/Saale , Germany
| | - Albert J R Heck
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences , University of Utrecht and Netherlands Proteomics Centre , Padualaan 8 , 3584 CH Utrecht , The Netherlands
| | - Franz Herzog
- Gene Center Munich, Department of Biochemistry, Faculty of Chemistry and Pharmacy , Ludwig Maximilians University of Munich , Feodor-Lynen-Strasse 25 , 81377 Munich , Germany
| | - Lan Huang
- Department of Physiology & Biophysics , University of California , Irvine , California 92697 , United States
| | - Michael R Hoopmann
- Institute for Systems Biology , 401 Terry Avenue North , Seattle , Washington 98109 , United States
| | - Nir Kalisman
- Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram , The Hebrew University of Jerusalem , Jerusalem 91904 , Israel
| | - Oleg Klykov
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences , University of Utrecht and Netherlands Proteomics Centre , Padualaan 8 , 3584 CH Utrecht , The Netherlands
| | - Zdeněk Kukačka
- Institute of Microbiology , BIOCEV , Prumyslova 595 , 252 50 Vestec , Czech Republic
| | - Fan Liu
- Leibniz Institute of Molecular Pharmacology (FMP) , Robert-Rössle-Strasse 10 , 13125 Berlin , Germany
| | - Michael J MacCoss
- Department of Genome Sciences , University of Washington , Seattle , Washington 98195 , United States
| | - Karl Mechtler
- Protein Chemistry Facility, Research Institute of Molecular Pathology (IMP) and Institute of Molecular Biotechnology (IMBA) , Vienna Biocenter (VBC) , Dr. Bohr-Gasse 3 , 1030 Vienna , Austria
| | - Ravit Mesika
- Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram , The Hebrew University of Jerusalem , Jerusalem 91904 , Israel
| | - Robert L Moritz
- Institute for Systems Biology , 401 Terry Avenue North , Seattle , Washington 98109 , United States
| | - Nagarjuna Nagaraj
- Biochemistry Core Facility , Max-Planck-Institute of Biochemistry , Am Klopferspitz 18 , 82152 Martinsried , Germany
| | - Victor Nesati
- Analytical Biochemistry, CSL Limited , Bio21 Institute , 30 Flemington Road , 3010 Parkville, Melbourne , Australia
| | - Ana G C Neves-Ferreira
- Laboratory of Toxinology , Oswaldo Cruz Institute , Fiocruz, Avenida Brasil 4365 (Moorish Castle) , Manguinhos, Rio de Janeiro , Rio de Janeiro 21040-900 , Brazil
| | - Robert Ninnis
- Analytical Biochemistry, CSL Limited , Bio21 Institute , 30 Flemington Road , 3010 Parkville, Melbourne , Australia
| | - Petr Novák
- Institute of Microbiology , BIOCEV , Prumyslova 595 , 252 50 Vestec , Czech Republic
| | - Francis J O'Reilly
- Chair of Bioanalytics, Institute of Biotechnology Technische Universität Berlin , 13355 Berlin , Germany
| | - Matthias Pelzing
- Analytical Biochemistry, CSL Limited , Bio21 Institute , 30 Flemington Road , 3010 Parkville, Melbourne , Australia
| | - Evgeniy Petrotchenko
- University of Victoria-Genome British Columbia Proteomics Centre , Vancouver Island Technology Park , Victoria , British Columbia V8Z 7X8 , Canada
| | - Lolita Piersimoni
- Departments of Biological Chemistry, Bioinformatics, and Chemistry , University of Michigan , Ann Arbor , Michigan 48109 , United States
| | - Manolo Plasencia
- Departments of Biological Chemistry, Bioinformatics, and Chemistry , University of Michigan , Ann Arbor , Michigan 48109 , United States
| | - Tara Pukala
- Discipline of Chemistry, Faculty of Sciences , University of Adelaide , North Terrace, Adelaide , South Australia 5005 , Australia
| | - Kasper D Rand
- Department of Pharmacy , University of Copenhagen , 2100 Copenhagen , Denmark
| | - Juri Rappsilber
- Chair of Bioanalytics, Institute of Biotechnology Technische Universität Berlin , 13355 Berlin , Germany.,Wellcome Trust Centre for Cell Biology, School of Biological Sciences , University of Edinburgh , EH9 3BF Edinburgh , U.K
| | - Dana Reichmann
- Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram , The Hebrew University of Jerusalem , Jerusalem 91904 , Israel
| | - Carolin Sailer
- University of Konstanz , Department of Biology , Universitätsstrasse 10 , 78457 Konstanz , Germany
| | - Chris P Sarnowski
- Department of Biology, Institute of Molecular Systems Biology , ETH Zurich , Otto-Stern-Weg 3 , 8093 Zurich , Switzerland.,PhD Program in Systems Biology , University of Zurich and ETH Zurich , 8092 Zurich , Switzerland
| | - Richard A Scheltema
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences , University of Utrecht and Netherlands Proteomics Centre , Padualaan 8 , 3584 CH Utrecht , The Netherlands
| | - Carla Schmidt
- Interdisciplinary Research Center HALOmem, Institute for Biochemistry and Biotechnology, Charles Tanford Protein Center , Martin Luther University Halle-Wittenberg , Kurt-Mothes-Strasse 3a , 06120 Halle/Saale , Germany
| | - David C Schriemer
- Department of Biochemistry & Molecular Biology, Robson DNA Science Centre , University of Calgary , 3330 Hospital Drive North West , Calgary , Alberta T2N 4N1 , Canada
| | - Yi Shi
- Department of Cell Biology , University of Pittsburgh, School of Medicine , Pittsburgh , Pennsylvania 15213 , United States
| | - J Mark Skehel
- MRC Laboratory of Molecular Biology , Cambridge Biomedical Campus , Francis Crick Avenue , Cambridge CB2 0QH , U.K
| | - Moriya Slavin
- Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram , The Hebrew University of Jerusalem , Jerusalem 91904 , Israel
| | - Frank Sobott
- Department of Chemistry , University of Antwerp , Groenenborgerlaan 171 , 2020 Antwerp , Belgium.,The Astbury Centre for Structural Molecular Biology and School of Molecular and Cellular Biology , University of Leeds , LS2 9JT Leeds , U.K
| | - Victor Solis-Mezarino
- Gene Center Munich, Department of Biochemistry, Faculty of Chemistry and Pharmacy , Ludwig Maximilians University of Munich , Feodor-Lynen-Strasse 25 , 81377 Munich , Germany
| | - Heike Stephanowitz
- Leibniz Institute of Molecular Pharmacology (FMP) , Robert-Rössle-Strasse 10 , 13125 Berlin , Germany
| | - Florian Stengel
- University of Konstanz , Department of Biology , Universitätsstrasse 10 , 78457 Konstanz , Germany
| | - Christian E Stieger
- Protein Chemistry Facility, Research Institute of Molecular Pathology (IMP) and Institute of Molecular Biotechnology (IMBA) , Vienna Biocenter (VBC) , Dr. Bohr-Gasse 3 , 1030 Vienna , Austria
| | - Esben Trabjerg
- Department of Pharmacy , University of Copenhagen , 2100 Copenhagen , Denmark
| | - Michael Trnka
- UCSF Mass Spectrometry Facility , Genentech Hall, 600 16th Street , San Francisco , California 94158 , United States
| | - Marta Vilaseca
- Institute for Research in Biomedicine (IRB Barcelona) , The Barcelona Institute of Science and Technology (BIST) , Baldiri Reixac 10 , 08028 Barcelona , Spain
| | - Rosa Viner
- Thermo Fisher Scientific , 355 River Oaks Parkway , San Jose , California 95134 , United States
| | - Yufei Xiang
- Department of Cell Biology , University of Pittsburgh, School of Medicine , Pittsburgh , Pennsylvania 15213 , United States
| | - Sule Yilmaz
- Computational Systems Biochemistry Research Group , Max-Planck-Institute of Biochemistry , Am Klopferspitz 18 , 82152 Martinsried , Germany
| | - Alex Zelter
- Department of Biochemistry , University of Washington , Seattle , Washington 98195 , United States
| | - Daniel Ziemianowicz
- Department of Biochemistry & Molecular Biology, Robson DNA Science Centre , University of Calgary , 3330 Hospital Drive North West , Calgary , Alberta T2N 4N1 , Canada
| | - Alexander Leitner
- Department of Biology, Institute of Molecular Systems Biology , ETH Zurich , Otto-Stern-Weg 3 , 8093 Zurich , Switzerland
| | - Andrea Sinz
- Department of Pharmaceutical Chemistry and Bioanalytics, Institute of Pharmacy, Charles Tanford Protein Center , Martin Luther University Halle-Wittenberg , Kurt-Mothes-Strasse 3a , 06120 Halle/Saale , Germany
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5
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Gustafsson OJR, Briggs MT, Condina MR, Winderbaum LJ, Pelzing M, McColl SR, Everest-Dass AV, Packer NH, Hoffmann P. MALDI imaging mass spectrometry of N-linked glycans on formalin-fixed paraffin-embedded murine kidney. Anal Bioanal Chem 2014; 407:2127-39. [PMID: 25434632 PMCID: PMC4357650 DOI: 10.1007/s00216-014-8293-7] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Revised: 10/20/2014] [Accepted: 10/21/2014] [Indexed: 11/28/2022]
Abstract
Recent developments in spatial proteomics have paved the way for retrospective in situ mass spectrometry (MS) analyses of formalin-fixed paraffin-embedded clinical tissue samples. This type of analysis is commonly referred to as matrix-assisted laser desorption/ionization (MALDI) imaging. Recently, formalin-fixed paraffin-embedded MALDI imaging analyses were augmented to allow in situ analyses of tissue-specific N-glycosylation profiles. In the present study, we outline an improved automated sample preparation method for N-glycan MALDI imaging, which uses in situ PNGase F-mediated release and measurement of N-linked glycans from sections of formalin-fixed murine kidney. The sum of the presented data indicated that N-glycans can be cleaved from proteins within formalin-fixed tissue and characterized using three strategies: (i) extraction and composition analysis through on-target MALDI MS and liquid chromatography coupled to electrospray ionization ion trap MS; (ii) MALDI profiling, where N-glycans are released and measured from large droplet arrays in situ; and (iii) MALDI imaging, which maps the tissue specificity of N-glycans at a higher resolution. Thus, we present a complete, straightforward method that combines MALDI imaging and characterization of tissue-specific N-glycans and complements existing strategies. MALDI imaging MS of N-linked glycans released from formalin-fixed paraffin-embedded murine kidney sections. Ion intensity maps for (Hex)2(HexNAc)3(Deoxyhexose)3+(Man)3(GlcNAc)2 (m/z 2304.932, red), (Hex)6+(Man)3(GlcNAc)2 (m/z 1905.742, green) and (Hex)2(HexNAc)2+(Man)3(GlcNAc)2 (m/z 1663.756, blue) ![]()
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Affiliation(s)
- Ove J R Gustafsson
- Adelaide Proteomics Centre, School of Molecular and Biomedical Science, University of Adelaide, Adelaide, South Australia, 5005, Australia
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6
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Rainczuk A, Condina M, Pelzing M, Dolman S, Rao J, Fairweather N, Jobling T, Stephens AN. The utility of isotope-coded protein labeling for prioritization of proteins found in ovarian cancer patient urine. J Proteome Res 2013; 12:4074-88. [DOI: 10.1021/pr400618v] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
| | - Mark Condina
- Bruker Biosciences Pty. Ltd., Preston,
Victoria, Australia, 3072
| | - Matthias Pelzing
- Bruker Biosciences Pty. Ltd., Preston,
Victoria, Australia, 3072
| | | | | | | | - Tom Jobling
- Obstetrics and Gynaecology, Monash
Medical Centre, Clayton VIC 3168 Australia
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7
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Dolman S, Eeltink S, Vaast A, Pelzing M. Investigation of carryover of peptides in nano-liquid chromatography/mass spectrometry using packed and monolithic capillary columns. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 912:56-63. [DOI: 10.1016/j.jchromb.2012.11.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Revised: 11/16/2012] [Accepted: 11/20/2012] [Indexed: 10/27/2022]
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8
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Baker MA, Hetherington L, Weinberg A, Naumovski N, Velkov T, Pelzing M, Dolman S, Condina MR, Aitken RJ. Analysis of phosphopeptide changes as spermatozoa acquire functional competence in the epididymis demonstrates changes in the post-translational modification of Izumo1. J Proteome Res 2012; 11:5252-64. [PMID: 22954305 DOI: 10.1021/pr300468m] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Spermatozoa are functionally inert when they emerge from the testes. Functional competence is conferred upon these cells during a post-testicular phase of sperm maturation in the epididymis. Remarkably, this functional transformation of epididymal spermatozoa occurs in the absence of nuclear gene transcription or protein translation. To understand the cellular mechanisms underpinning epididymal maturation, we have performed a label-free, MS-based, comparative quantification of peptides from caput, corpus and caudal epididymal spermatozoa. In total, 68 phosphopeptide changes could be detected during epididymal maturation corresponding to the identification of 22 modified proteins. Included in this list are the sodium-bicarbonate cotransporter, the sperm specific serine kinase 1, AKAP4 and protein kinase A regulatory subunit. Furthermore, four phosphopeptide changes came from Izumo1, the sperm-egg fusion protein, in the cytoplasmic segment of the protein. 2D-PAGE confirmed that Izumo1 is post-translationally modified during epididymal transit. Interestingly, phosphorylation on Izumo1 was detected on residue S339 in the caput and corpus but not caudal cells. Furthermore, Izumo1 exhibited four phosphorylated residues when spermatozoa reached the cauda, which were absent from caput cells. A model is advanced suggesting that these phospho-regulations are likely to act as a scaffold for the association of adaptor proteins with Izumo1 as these cells prepare for fertilization.
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Affiliation(s)
- Mark A Baker
- Priority Research Centre in Reproductive Science, School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW, 2308, Australia.
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9
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Rechthaler J, Pelzing M, Ingendoh A, Kukovecz A, Prato M, Kuzmany H, Allmaier G. LDI and ESI MS as well as low energy CID of a self-assembling nanorod-forming fullerene derivative. J Mass Spectrom 2011; 46:1108-1114. [PMID: 22124981 DOI: 10.1002/jms.1996] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
An amphiphatic fullerene derivative (8-(N-Methyl-Fullero-Pyrrolidinium-1-yl-chloride)-3,6-Dioxaoctan-1-Ammonium Chloride (MFPDAC)), which is of great interest in nanotechnology due to the fact that it forms self-assembling fullerenic nanorods, has been structurally characterized with emphasis to its purity and thermal treatment of a formed nanorod film (on a LDI target) by means of laser desorption/ionization (LDI) coupled with high-resolution curved field reflectron time-of-flight (TOF) mass spectrometry, and by low energy MS/MS as well as in-source fragmentation experiments applying an quadrupole ion trap (QIT) combined with a two-stage reflectron TOF analyzer. The interpretation of LDI results has been supplemented by ESI QIT MS(n) (n = 1-3), as well as high-resolution ESI reflectron TOF mass spectrometric experiments. Based on the experimental data obtained by both desorption/ionization techniques, various types of analyzers and sample treatments, we could completely characterize MFPDAC and further found out that the investigated sample was not entirely free of impurities. Furthermore, the envisaged loss of the derivative sidechain upon the heat treatment in vacuum of the self-assembled nanorod sample film on a metallic substrate could be successfully monitored by LDI MS.
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Affiliation(s)
- Justyna Rechthaler
- Institute of Chemical Technologies and Analysis, Vienna University of Technology, Getreidemarkt 9/164, A-1060, Vienna, Austria
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10
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Mauko L, Pelzing M, Dolman S, Nordborg A, Lacher NA, Haddad PR, Hilder EF. Zwitterionic-type hydrophilic interaction nano-liquid chromatography of complex and high mannose glycans coupled with electrospray ionisation high resolution time of flight mass spectrometry. J Chromatogr A 2011; 1218:6419-25. [PMID: 21802690 DOI: 10.1016/j.chroma.2011.07.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Revised: 07/01/2011] [Accepted: 07/04/2011] [Indexed: 11/27/2022]
Abstract
In this study we describe a new method for rapid and sensitive analysis of reduced high mannose and complex glycans using zwitterionic-type hydrophilic interaction nano-liquid chromatography (nano ZIC-HILIC, 75 μm I.D.×150 mm) coupled with high resolution nanoelectrospray ionisation time of flight mass spectrometry (nano ESI-TOF-MS). The retention of neutral glycans increases with increasing molecular weight and is higher for high mannose glycans than for complex-type glycans. The selectivity of ZIC-HILIC for sialylated glycans differs from that for the neutral glycans and is believed to involve electrostatic repulsion; therefore, charged glycans are eluted earlier than neutral glycans with comparable molecular weight. Due to the improved sensitivity achieved by employing a ZIC-HILIC nano-column, a range of less common complex glycans has been studied and the high resolution mass spectrometry enabled confirmation of glycan composition for the proposed structures. Good sensitivity for glycans was achieved without prior fluorescent labelling, and the time of the analysis was significantly reduced compared to the separation of glycans on a conventional-size column. The proposed method offers a fast and sensitive approach for glycan profiling applied to analysis of biopharmaceuticals.
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Affiliation(s)
- Lea Mauko
- Pfizer Analytical Research Centre (PARC), School of Chemistry, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia
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11
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Taichrib A, Pelzing M, Pellegrino C, Rossi M, Neusüß C. High resolution TOF MS coupled to CE for the analysis of isotopically resolved intact proteins. J Proteomics 2011; 74:958-66. [DOI: 10.1016/j.jprot.2011.01.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2010] [Revised: 12/29/2010] [Accepted: 01/13/2011] [Indexed: 10/18/2022]
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12
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Baker MA, Smith ND, Hetherington L, Pelzing M, Condina MR, Aitken RJ. Use of Titanium Dioxide To Find Phosphopeptide and Total Protein Changes During Epididymal Sperm Maturation. J Proteome Res 2011; 10:1004-17. [DOI: 10.1021/pr1007224] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
| | | | | | - Matthias Pelzing
- Bruker Biosciences, PTY LTD, 28 Albert St, Preston, VIC 3072, Australia
| | - Mark R. Condina
- Bruker Biosciences, PTY LTD, 28 Albert St, Preston, VIC 3072, Australia
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13
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Abstract
Electrospray ionization-mass spectrometry (ESI-MS) is a powerful tool for the characterization of intact proteins. However, complex samples require separation in order to obtain clear mass spectra and avoid matrix interaction; capillary electrophoresis (CE) has been shown to be a powerful separation technique for intact proteins. Herein, we present a method based on capillary zone electrophoretic (CZE) separation coupled online with mass spectrometric protein detection. While this approach is suitable for the separation and characterization of various intact proteins, the emphasis is placed on the separation of glycoforms of various and rather complex glycoproteins. The method has been successfully applied to the analysis of glycoproteins, e.g., erythropoietin, fetuin, and alpha-acid glycoprotein.
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14
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Matysik FM, Neusüss C, Pelzing M. Fast capillary electrophoresis coupled with time-of-flight mass spectrometry under separation conditions of high electrical field strengths. Analyst 2008; 133:1764-6. [PMID: 19082081 DOI: 10.1039/b806349d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An experimental approach is presented that enables very fast capillary electrophoretic separations in conjunction with time-of-flight mass spectrometry. Field strengths exceeding 1 kV cm(-1) have been applied for separations of model analytes resulting in migration times on the timescale of seconds.
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15
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Pongcharoen W, Rukachaisirikul V, Phongpaichit S, Kühn T, Pelzing M, Sakayaroj J, Taylor WC. Metabolites from the endophytic fungus Xylaria sp. PSU-D14. Phytochemistry 2008; 69:1900-1902. [PMID: 18495187 DOI: 10.1016/j.phytochem.2008.04.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2008] [Revised: 04/01/2008] [Accepted: 04/04/2008] [Indexed: 05/26/2023]
Abstract
Glucoside derivatives, xylarosides A (1) and B (2), were isolated from the broth extract of the endophytic fungus Xylaria sp. PSU-D14 along with two known compounds, sordaricin (3) and 2,3-dihydro-5-hydroxy-2-methyl-4H-1-benzopyran-4-one (4). The structures were assigned by spectroscopic methods. Sordaricin (3), one of the known metabolites, exhibited moderate antifungal activity against Candida albicans ATCC90028 with a MIC value of 32 microg/ml.
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Affiliation(s)
- Wipapan Pongcharoen
- Department of Chemistry, Faculty of Science, Prince of Songkla University, Songkhla 90112, Thailand
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16
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Baidoo EEK, Benke PI, Neusüss C, Pelzing M, Kruppa G, Leary JA, Keasling JD. Capillary Electrophoresis-Fourier Transform Ion Cyclotron Resonance Mass Spectrometry for the Identification of Cationic Metabolites via a pH-Mediated Stacking-Transient Isotachophoretic Method. Anal Chem 2008; 80:3112-22. [DOI: 10.1021/ac800007q] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Mayboroda OA, Neusüss C, Pelzing M, Zurek G, Derks R, Meulenbelt I, Kloppenburg M, Slagboom EP, Deelder AM. Amino acid profiling in urine by capillary zone electrophoresis - mass spectrometry. J Chromatogr A 2007; 1159:149-53. [PMID: 17540385 DOI: 10.1016/j.chroma.2007.04.055] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2006] [Revised: 04/06/2007] [Accepted: 04/12/2007] [Indexed: 11/17/2022]
Abstract
Analysis of amino acid profiles in urine and plasma is an essential part of modern clinical diagnostic routine. Here we present an approach for the analysis of amino acids in urine by capillary electrophoresis/time-of-flight (TOF) mass spectrometry. At first a method combining improved separation, high dynamic range, and high sensitivity is presented. Detection limits in the mid nM-range are achieved through the use of pH-mediated stacking injection in combination with modern TOF detection technology. The method can be easily applied to detect differences in the amino acid profile in urine in a clinical context. Moreover, beside amino acids low molecular weight amines, peptides and related metabolites can be profiled. As a proof of concept, urine samples from patients suffering from osteoarthritis have been analyzed. Finally, the introduction of multivariate data analysis in the work flow was evaluated on spiked urine samples and real clinical material.
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Affiliation(s)
- Oleg A Mayboroda
- Biomolecular Mass Spectrometry Unit, Department of Parasitology, LUMC, Leiden, The Netherlands.
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18
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Carrasco-Pancorbo A, Neusüss C, Pelzing M, Segura-Carretero A, Fernández-Gutiérrez A. CE- and HPLC-TOF-MS for the characterization of phenolic compounds in olive oil. Electrophoresis 2007; 28:806-21. [PMID: 17315149 DOI: 10.1002/elps.200600382] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
We present an easy and rapid method for the analysis of phenolic compounds in extra-virgin olive oil by CZE coupled with ESI-TOF-MS. Optimum electrophoretic separation was obtained using a basic carbonate electrolyte. We thus achieved the determination of several important families (phenyl alcohols, phenyl acids, lignans, flavonoids, and secoiridoids) of the polar fraction of the olive oil. Furthermore, other "unknown" compounds were also identified. In addition to the CZE method, HPLC analyses were made, separating compounds belonging to the main families present in this polyphenolic fraction, as well as other new compounds. We compared the results obtained with both techniques and found it was possible to determine more than 45 compounds with both methods. The sensitivity, together with mass accuracy and true isotopic pattern of the TOF-MS, allowed the identification of a broad series of known and so far not described phenolic compounds present in extra-virgin olive oil.
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19
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Pérez P, Simó C, Neusüss C, Pelzing M, San Roman J, Cifuentes A, Gallardo A. New pseudopeptidic cross-linker containing urea bonds: study of its degradation routes in aqueous media using capillary electrophoresis-mass spectrometry. Biomacromolecules 2006; 7:720-7. [PMID: 16529406 DOI: 10.1021/bm050577e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An accelerated degradation study has been performed on TLT, a pseudopeptide that includes esterified tyrosine and lysine linked by urea bonds, as well as on their derivatives, i.e., a dimethacrylic cross-linker (DMTLT) and a poly(dimethylacrylamide) cross-linked with DMTLT. The monitoring and analytical characterization has been carried out by capillary electrophoresis-mass spectrometry (CE-MS), using ion trap and time-of-flight MS analyzers. Several degradative species have been identified, and a kinetic analysis of the variation of their concentration with time has been obtained. During the initial stages of degradation, there is a competition between hydrolysis of the ester groups and cyclization by nucleophilic attack of the NHs of the urea groups to the carbonyl ester group. At higher degradation time (weeks or months), evidences of backbone breakdown, including urea hydrolysis, have been found.
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Affiliation(s)
- Paloma Pérez
- Institute of Polymer Science and Technology, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
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20
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Balaguer E, Demelbauer U, Pelzing M, Sanz-Nebot V, Barbosa J, Neusüss C. Glycoform characterization of erythropoietin combining glycan and intact protein analysis by capillary electrophoresis – electrospray – time-of-flight mass spectrometry. Electrophoresis 2006; 27:2638-50. [PMID: 16817164 DOI: 10.1002/elps.200600075] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Glycosylation of recombinant human erythropoietin (rHuEPO) is a post-translational process that alters biological activity, solubility and lifetime of the glycoprotein in blood, and strongly depends on the type of cell and the cell culture conditions. A fast and simple method providing extensive carbohydrate information about the glycans present in rHuEPO and other glycoproteins is needed in order to improve current methods in drug development or product quality control. Here, an improved method for intact rHuEPO glycoform characterization by CZE-ESI-TOF MS has been developed using a novel capillary coating and compared to a previous study. Both methods allow a fast separation in combination with accurate mass characterization of the single protein isoforms. The novel dynamic coating provides a separation at an EOF close to zero, enabling better separation. This results in an improved mass spectrometric resolution and the detection of minor isoforms. In order to assign an unequivocal carbohydrate composition to every intact glycoform, a CZE-ESI-MS separation method for enzymatically released underivatized N-glycans has been developed. The TOF MS allows the correct identification of the glycans due to its high mass accuracy and resolution. Therefore, glycan modifications such as acetylation, oxidation, sulfation and even the exchange of OH by NH(2) are successfully characterized. Information of the protein-backbone molecular mass has been combined with results from peptide analysis (revealing information about O-glycosylation) and from the glycan analysis, including the detection of as yet undescribed glycans containing four antennae and five sialic acids. This allows an unequivocal assignment of an overall glycosylation composition to the molecular masses obtained for the intact rHuEPO glycoforms.
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Affiliation(s)
- Elvira Balaguer
- Analytical Chemistry Department, University of Barcelona, Spain
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21
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Simó C, Pérez P, Neusüss C, Pelzing M, San Román J, Gallardo A, Cifuentes A. Capillary electrophoresis-mass spectrometry of a new cross-linker with acrylic functionality. Electrophoresis 2006; 27:2250-8. [PMID: 16645975 DOI: 10.1002/elps.200500395] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Analytical characterization of dimethacrylate-tyrosine-lysine-tyrosine (DMTLT, a new biodegradable acrylic cross-linker synthesized at our laboratory) is carried out using CE-MS. DMTLT is a pseudopeptide composed by tyrosine-lysine-tyrosine amino acids linked through urea bonds with two methacrylic groups, one at each end of the molecule, making this compound an excellent cross-linker for polymerization reactions and for obtaining new biodegradable materials. A new CE-MS method is developed for the characterization of DMTLT and its products of degradation after basic hydrolysis. In order to carry out an exhaustive examination of such degradation products methods based on CE coupled to IT and TOF-MS are employed. Based on CE-IT-MS results and the elemental composition of the degradation products obtained by CE-TOF-MS, conclusions on the mechanism and kinetic of hydrolysis of DMTLT are obtained confirming both the usefulness of CE-MS to characterize new biomaterials and the applicability of DMTLT for preparing new biodegradable polymers. These results are corroborated through the CE-MS detection of the identified products of degradation in a dimethyl acrylamide polymer cross-linked with DMTLT.
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Affiliation(s)
- Carolina Simó
- Institute of Industrial Fermentations (CSIC), Madrid, Spain
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22
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Zürbig P, Renfrow MB, Schiffer E, Novak J, Walden M, Wittke S, Just I, Pelzing M, Neusüss C, Theodorescu D, Root KE, Ross MM, Mischak H. Biomarker discovery by CE-MS enables sequence analysisvia MS/MS with platform-independent separation. Electrophoresis 2006; 27:2111-25. [PMID: 16645980 DOI: 10.1002/elps.200500827] [Citation(s) in RCA: 158] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
CE-MS is a successful proteomic platform for the definition of biomarkers in different body fluids. Besides the biomarker defining experimental parameters, CE migration time and molecular weight, especially biomarker's sequence identity is an indispensable cornerstone for deeper insights into the pathophysiological pathways of diseases or for made-to-measure therapeutic drug design. Therefore, this report presents a detailed discussion of different peptide sequencing platforms consisting of high performance separation method either coupled on-line or off-line to different MS/MS devices, such as MALDI-TOF-TOF, ESI-IT, ESI-QTOF and Fourier transform ion cyclotron resonance, for sequencing indicative peptides. This comparison demonstrates the unique feature of CE-MS technology to serve as a reliable basis for the assignment of peptide sequence data obtained using different separation MS/MS methods to the biomarker defining parameters, CE migration time and molecular weight. Discovery of potential biomarkers by CE-MS enables sequence analysis via MS/MS with platform-independent sample separation. This is due to the fact that the number of basic and neutral polar amino acids of biomarkers sequences distinctly correlates with their CE-MS migration time/molecular weight coordinates. This uniqueness facilitates the independent entry of different sequencing platforms for peptide sequencing of CE-MS-defined biomarkers from highly complex mixtures.
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Affiliation(s)
- Petra Zürbig
- Mosaiques Diagnostics & Therapeutics AG, Hannover, Germany
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23
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Ojanperä S, Pelander A, Pelzing M, Krebs I, Vuori E, Ojanperä I. Isotopic pattern and accurate mass determination in urine drug screening by liquid chromatography/time-of-flight mass spectrometry. Rapid Commun Mass Spectrom 2006; 20:1161-7. [PMID: 16521169 DOI: 10.1002/rcm.2429] [Citation(s) in RCA: 132] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
An efficient method was developed for toxicological drug screening in urine by liquid chromatography coupled with electrospray ionization time-of-flight mass spectrometry. The method relies on a large target database of exact monoisotopic masses representing the elemental formulae of reference drugs and their metabolites. Mass spectral identification is based on matching measured accurate mass and isotopic pattern (SigmaFit) of a sample component with those in the database. Data post-processing software was developed for automated reporting of findings in an easily interpretable form. The mean and median of SigmaFit for true-positive findings were 0.0066 and 0.0051, respectively. The mean and median of mass error absolute values for true-positive findings were 2.51 and 2.17 ppm, respectively, corresponding to 0.65 and 0.60 mTh. For routine screening practice, a SigmaFit tolerance of 0.03 and a mass tolerance of 10 ppm were chosen. Ion abundance differences from urine extracts did not affect the accuracy of the automatically acquired SigmaFit or mass values. The results show that isotopic pattern matching by SigmaFit is a powerful means of identification in addition to accurate mass measurement.
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Affiliation(s)
- Suvi Ojanperä
- Department of Forensic Medicine, University of Helsinki, Helsinki, Finland.
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24
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Psurek A, Neusüss C, Pelzing M, Scriba GKE. Analysis of the lipophilic peptaibol alamethicin by nonaqueous capillary electrophoresis-electrospray ionization-mass spectrometry. Electrophoresis 2005; 26:4368-78. [PMID: 16287177 DOI: 10.1002/elps.200500387] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The microheterogeneous peptaibol alamethicin F30 isolated from the culture broth of Trichoderma viride was analyzed by nonaqueous CE-electrospray-MS using an IT and a TOF mass analyzer. Compared to aqueous buffers, higher separation selectivity was observed for methanolic BGE allowing the detection of more minor components. The low electrophoretic mobility observed for neutral analytes under nonaqueous conditions may be explained by ion-dipole interactions between the peptide analytes and electrolyte ions. The amino acid sequences of the individual components were derived from MS(n) using the doubly or triply charged pseudomolecular ions as well as characteristic fragments as precursor ions. The exchange of Ala by alpha-aminoisobutyric acid (Aib) which is frequently observed for peptaibols was detected for several components. Additional variations included the exchange of Gln to Glu, and the loss of the C-terminal amino alcohol or of the first six amino acids from the N-terminus with concomitant formation of pyroglutamyl residues. In most cases comigration of the Aib peptaibols with the respective Ala component was observed as the mass difference of 14 Da as the result of the amino acid exchange was not sufficient to translate into an electrophoretic separation under the conditions applied. However, proper selection of the precursor ions allowed the unequivocal analysis of the components. Additional TOF-MS measurements were performed in order to resolve the ammonium adducts from comigrating compounds (i.e., Aib-Ala exchange) and to confirm the amino acid composition of the individual components. Except for neutral compounds migrating close to the EOF the mass accuracy was better than 4 ppm for the doubly charged pseudomolecular ions and better than 2 ppm for triply charged ions.
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Affiliation(s)
- Arndt Psurek
- Department of Pharmaceutical Chemistry, School of Pharmacy, University of Jena, Germany
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Kolch W, Neusüss C, Pelzing M, Mischak H. Capillary electrophoresis-mass spectrometry as a powerful tool in clinical diagnosis and biomarker discovery. Mass Spectrom Rev 2005; 24:959-977. [PMID: 15747373 DOI: 10.1002/mas.20051] [Citation(s) in RCA: 203] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Proteome analysis is now emerging as key technology for deciphering biological processes and the discovery of biomarkers for diseases from tissues and body fluids. The complexity and wide dynamic range of protein expression poses a formidable challenge to both peptide separation technologies and mass spectrometry (MS). Here we review the efforts that have been undertaken to date, focussing on capillary electrophoresis coupled to mass spectrometry (CE-MS). We discuss CE-MS from an application point of view evaluating its merits and vices in regard to biomarker discovery and clinical applications. As examples, we present the use of CE-MS for the determination of protein patterns in urine, serum, and other body fluids. Finally, the benefits and limitations of CE-MS for the analysis of proteins in clinical samples are discussed against the background of alternative technologies.
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Affiliation(s)
- Walter Kolch
- The Beatson Institute for Cancer Research, Garscube Estate, Switchback Road, Bearsden, Glasgow G61 1BD, United Kingdom
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Pelzing M, Neusüss C. Separation techniques hyphenated to electrospray-tandem mass spectrometry in proteomics: Capillary electrophoresisversus nanoliquid chromatography. Electrophoresis 2005; 26:2717-28. [PMID: 15966011 DOI: 10.1002/elps.200410424] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Liquid chromatography (LC) nanoelectrospray-tandem mass spectrometry (MS/MS) is a key technology for the study of proteomics, with the main benefit to the characterization of sensitive peptides from complex mixtures. Capillary electrophoresis coupled to mass spectrometry (MS) has been taken into consideration sporadically due to the highly efficient separation and ability to handle low sample amount, yet classified as being less sensitive with respect to analyte concentration. The limitation in capillary zone electrophoresis (CZE) injection volumes can be overcome by on-line solid-phase extraction (SPE). Such an on-line SPE-CZE system was explored in combination with an ion trap (IT) mass spectrometer. Thus, it was possible to inject more than 100 microL sample solution on to the CZE capillary. Concentration limits of detection as low as 100 amol/microL were demonstrated for a peptide standard. This SPE-CZE-microelectrospray ionization (ESI)-MS/MS setup was compared directly to nanoLC/nanoESI using the same sample of a tryptic digest of bovine serum albumin (BSA) as a reference standard. Measurements were made on one IT mass spectrometer with identical acquisition parameters. Both chromatography systems enabled the separation and detection of low levels of peptides from a mixture of moderate complexity, with most peptides identified using both techniques; however, specific differences were obvious. The nanoLC-MS is about five times more sensitive than the CZE-MS, yet the difference was less pronounced than expected. The CZE-MS technique showed reduced loss of peptides, especially for larger peptides (missed cleavages) and is about four times faster than the nanoLC-MS approach.
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Simó C, Herrero M, Neusüss C, Pelzing M, Kenndler E, Barbas C, Ibáñez E, Cifuentes A. Characterization of proteins fromSpirulina platensis microalga using capillary electrophoresis-ion trap-mass spectrometry and capillary electrophoresis-time of flight-mass spectrometry. Electrophoresis 2005; 26:2674-83. [PMID: 15929060 DOI: 10.1002/elps.200500055] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
In this work, a new capillary electrophoresis-mass spectrometry (CE-MS) procedure is developed to analyze proteins in Spirulina platensis microalgae. It is demonstrated that a fine optimization of several separation parameters is essential in order to achieve suitable CE-MS analysis of these proteins in natural extracts from microalgae. Namely, optimization of the composition of the separation buffer, electrospray conditions, and washing routine between runs are required in order to obtain reliable and reproducible CE-MS analyses of the main proteins found in this microalga (namely, allophycocyanin-alpha chain, allophycocyanin-beta, c-phycocyanin-alpha, and c-phycocyanin-beta). The relative molecular mass of these biopolymers is determined using two different MS instruments coupled to CE, i.e., CE-ion trap-MS and CE-time of flight-MS (CE-TOF-MS). A comparison between the results obtained with both instruments is carried out. The high resolution of the TOF-MS enables the distinction of small modifications in proteins and, thus, a more accurate mass determination. Interestingly, molecular mass values obtained by both CE-MS procedures agree very well while these experimental values are only in partial agreement with those theoretically expected (i.e., genetically derived masses). Some protein modifications due to amino acids exchange induced by nucleotide codon mutations are proposed to explain this difference.
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Affiliation(s)
- Carolina Simó
- Department of Food Analysis, Institute of Industrial Fermentations (CSIC), Madrid, Spain
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Bringmann G, Kajahn I, Neusüss C, Pelzing M, Laug S, Unger M, Holzgrabe U. Analysis of the glucosinolate pattern ofArabidopsis thalianaseeds by capillary zone electrophoresis coupled to electrospray ionization-mass spectrometry. Electrophoresis 2005; 26:1513-22. [PMID: 15776481 DOI: 10.1002/elps.200410255] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
An easy and rapid method for the analysis of intact, non-desulfated glucosinolates by capillary zone electrophoresis (CZE) coupled to electrospray ionization-time of flight-mass spectrometry (ESI-TOF-MS) is described. Surprisingly, an electrolyte and a sheath liquid based on formic acid provided the best results. In this strongly acidic system, the glucosinolates were separated and detected as anions, resulting in an excellent selectivity. Thus, crude plant extracts could be analyzed without any interference of matrix constituents. The sensitivity together with mass accuracy and true isotopic pattern of the TOF-MS allowed identification of a broad series of glucosinolates in Arabidopsis thaliana seeds.
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Affiliation(s)
- Gerhard Bringmann
- Institute of Organic Chemistry, University of Würzburg, Würzburg, Germany.
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Huhn C, Neusüss C, Pelzing M, Pyell U, Mannhardt J, Pütz M. Capillary electrophoresis-laser induced fluorescence-electrospray ionization-mass spectrometry: A case study. Electrophoresis 2005; 26:1389-97. [PMID: 15765475 DOI: 10.1002/elps.200410163] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The simultaneous hyphenation of capillary electrophoresis (CE) with laser-induced fluorescence (LIF) detection and electrospray ionization-mass spectrometry (ESI-MS) as a novel combined detection system for CE is presented. beta-Carbolines were chosen as model analytes with a forensic background. Nonaqueous CE as well as conventional CE with an aqueous buffer system are compared concerning efficiency and obtainable detection limits. The distance between the optical detection window and the sprayer tip was minimized by placing the optical cell directly in front of the electrospray interface. Similar separation efficiencies for both detection modes could thus be obtained. No significant peak-broadening induced by the MS interface was observed. The high fluorescence quantum yield and the high proton affinity of the model analytes investigated resulted in limits of detection in the fg (nmol/L) range for both detection methods. The analysis of confiscated ayahuasca samples and ethanolic plant extracts revealed complementary selectivities for LIF and MS detection. Thus, it is possible to improve peak identification of the solutes investigated by the use of these two detection principles.
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Affiliation(s)
- Carolin Huhn
- Philipps-University Marburg, Analytical Chemistry, Marburg, Germany.
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Neusüss C, Demelbauer U, Pelzing M. Glycoform characterization of intact erythropoietin by capillary electrophoresis-electrospray-time of flight-mass spectrometry. Electrophoresis 2005; 26:1442-50. [PMID: 15759301 DOI: 10.1002/elps.200410269] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Glycosylated proteins often show a large variation in their glycosylation pattern, complicating their structural characterization. In this paper, we present a method for the accurate mass determination of intact isomeric glycoproteins based on capillary electrophoresis-electrospray-time of flight-mass spectrometry. Human recombinant erythropoietin has been chosen as a showcase. The approach enables the on-line removal of nonglycosylated proteins, salts, and neutral and negatively charged species. More important, different glycosylation forms are separated both on the base of differences in the number of negatively charged sialic acid residues and the size of the glycans. Thus, 44 glycoforms and in total about 135 isoforms of recombinant human erythropoietin, taking also acetylation into account, could be distinguished for the reference material from the European Pharmacopeia. Distinct glycosylation differences for samples from different suppliers are clearly observed. Based on the accurate mass an overall composition of each single isoform is proposed, perfectly in agreement with data on glycan and glycopeptide analysis. This method is an ideal complement to the established techniques for glycopeptide and glycan analysis, not differentiating branching or linkage isoforms, but leading to an overall composition of the glycoprotein. The presented strategy is expected to improve significantly the ability to characterize and quantify isomeric glycoforms for a large variety of glycoproteins.
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Abstract
Mass spectrometry (MS) has become a key tool for the characterization of biologically relevant molecules in the last decade. Due to the complexity of most biological samples an upstream separation is essential. Capillary electrophoresis (CE) has gained much interest due to its high separation efficiency, speed, and often complementary selectivity to liquid chromatography. We describe the state-of-the-art of on-line CE-MS for the analysis of molecules of biological origin. The characterization of peptides, including the study of post-translational modifications, intact proteins, oligonucleotides, and related interaction studies are reviewed. Relevant publications are summarized in tables, including some important method parameters. Key applications are discussed with respect to the advantages and limitations of CE-MS. Coupling interfaces, preconcentration techniques, capillary coatings, and the different CE techniques, e.g., capillary zone electrophoresis, capillary isoelectric focusing, capillary gel electrophoresis, etc. are briefly discussed against the background of their bioanalytical applications.
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Unger M, Dreyer M, Specker S, Laug S, Pelzing M, Neusüss C, Holzgrabe U, Bringmann G. Analytical characterisation of crude extracts from an African Ancistrocladus species using high-performance liquid chromatography and capillary electrophoresis coupled to ion trap mass spectrometry. Phytochem Anal 2004; 15:21-26. [PMID: 14979522 DOI: 10.1002/pca.737] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The analysis by HPLC, CE and CE-MS/MS of root bark extracts of a, so far undescribed, Central-African Ancistrocladus species (family Ancistrocladaceae) is described. Owing to the complexity of the extract, the application of reversed-phase HPLC resulted in a partially incomplete separation of the naphthylisoquinoline alkaloids, whilst CE using a non-aqueous buffer proved to be a very valuable complementary method for a first characterisation of the crude extract. By performing additional CE-MS/MS experiments, in combination with parallel isolation studies and structural elucidation using conventional methods, six alkaloidal substances present in the plant could be identified.
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Affiliation(s)
- Matthias Unger
- Institute of Pharmacy and Food Chemistry, Julius-Maximilians University Würzburg, D-97074 Würzburg, Germany.
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Simó C, Cottet H, Vayaboury W, Giani O, Pelzing M, Cifuentes A. Nonaqueous Capillary Electrophoresis−Mass Spectrometry of Synthetic Polymers. Anal Chem 2003; 76:335-44. [PMID: 14719880 DOI: 10.1021/ac034995q] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work, the separation and characterization of ionizable organic polymers nonsoluble in water is carried out using nonaqueous capillary electrophoresis-ion trap mass spectrometry (NACE-MS). The polymers studied are poly(N(epsilon)-trifluoroacetyl-l-lysine) (poly(TFA-Lys)) obtained by ring-opening polymerization of the corresponding N-carboxyanhydride. Different parameters (i.e., liquid sheath nature and flow rate, electrospray temperature, and separation buffer composition) are optimized in order to obtain both an adequate CE separation and a high MS signal of the samples under study. The optimum NACE-MS separation conditions allow the molecular mass characterization of poly(TFA-Lys) up to a degree of polymerization of 38. NACE-MS provides interesting information on the chemical structure of (i). the polymer end groups and (ii). other final byproducts. The MS spectra obtained by using this CE-MS protocol confirm that the polymerization was initiated by the reaction of n-hexylamine (initiator) on the monomer. CE-MS-MS and CE-MS-MS-MS results demonstrate that two different termination reactions occurred during the polymerization process leading to the transformation of the reactive amine end group into a carboxylic or a formyl groups. Byproducts such as 3-hydantoinacetic acid or diketopiperazine were also detected. To our knowledge, this is the first work in which the great possibilities of NACE-MS and NACE-MS(n) for characterizing synthetic polymers are demonstrated.
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Affiliation(s)
- Carolina Simó
- Department of Food Analysis, Institute of Industrial Fermentations (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
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De Boni S, Neusüss C, Pelzing M, Scriba GKE. Identification of degradation products of aspartyl tripeptides by capillary electrophoresis-tandem mass spectrometry. Electrophoresis 2003; 24:874-82. [PMID: 12627450 DOI: 10.1002/elps.200390110] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Capillary electrophoresis-electrospray tandem mass spectrometry (CE-MS/MS) has been used to identify degradation products of the aspartyl tripeptides Phe-Asp-GlyNH(2) and Gly-Asp-PheNH(2) following incubation of the peptides in acidic and alkaline solution. At pH 2, the dominant decomposition products resulted from cleavage of the peptide backbone amide bonds to yield the respective dipeptides and amino acids. In addition, the cyclic aspartyl succinimide intermediate was identified by its [M+H](+) at m/z = 319 and the MS/MS spectrum exhibiting a simple fragmentation pattern with the [C(8)H(10)N](+)-ion as the principal daughter ion (a(1) of Phe-Asp-GlyNH(2)). Deamidation of the C-terminal amide as well as isomerization and enantiomerization of the Asp residue occurred upon incubation at pH 10. alpha-Asp and the isomeric beta-Asp and most of the diastereomeric forms (corresponding to D/L-Asp) could be separated by CE. All isomers could be identified based on their MS/MS spectra. Peptides with the amino acid sequence Phe-Asp-Gly containing the regular alpha-Asp bond displayed a highly intense b(2) fragment ion and a low abundant y(2) ion. In contrast, the y(2) and a(1) fragment were high abundant daughter ions in the mass spectra of beta-Asp peptides while the b(2) ion exhibited a lower abundance. Differences in the MS/MS spectra of the isomers of the peptides with the sequence Gly-Asp-Phe were obvious but less pronounced. In conclusion, CE-MS/MS proved to be a useful tool to study the decomposition and enantiomerization of peptides including the isomerization of Asp residues, due to the combination of efficient separation of isomers by CE and their identification by MS/MS.
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Affiliation(s)
- Silvia De Boni
- University of Jena, School of Pharmacy, Department of Pharmaceutical Chemistry, Jena, Germany
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35
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Müller K, Pelzing M, Gnauk T, Kappe A, Teichmann U, Spindler G, Haferkorn S, Jahn Y, Herrmann H. Monoterpene emissions and carbonyl compound air concentrations during the blooming period of rape (Brassica napus). Chemosphere 2002; 49:1247-1256. [PMID: 12489721 DOI: 10.1016/s0045-6535(02)00610-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
An increasing percentage of agricultural land in Germany is used for oil seed plants. Hence, rape has become an important agricultural plant (in Saxony 1998: 12% of the farmland) in the recent years. During flowering of rape along with intensive radiation and high temperatures, a higher production and emission of biogenic VOC was observed. The emissions of terpenes were determined and more importantly, high concentrations of organic carbonyl compounds were observed during this field experiment. All measurements of interest have been carried out during two selected days with optimal weather conditions. It is found that the origin or the mechanism of formation of different group of compounds had strong influence on the day to day variation of their concentrations. The emission flux of terpenes from flowering rape plants was determined to be 16-32 microg h(-1) m(-2) (30-60 ng h(-1) per g dry plant-540-11080 ng h(-1) per plant), in total. Limonene, alpha-thujene and sabinene were the most important compounds (about 60% of total terpenes). For limonene and sabinene reference emission rates (Ms) and temperature coefficients were determined: beta(limonene) = 0.108 K(-1) and Ms = 14.57 microg h(-1) m(-2) beta(sabinene) = 0.095 K(-1) and Ms = 5.39 microg h(-1) m(-2). The detected carbonyl compound concentrations were unexpectedly high (maximum formaldehyde concentration was 18.1 ppbv and 3.4 ppbv for butyraldehyde) for an open field. Possible reasons for these concentrations are the combination of primary emission from the plants induced by high temperature and high ozone stress, the secondary formation from biogenically and advected anthropogenically emitted VOC at high radiation intensities and furthered by the low wind speeds at this time.
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Affiliation(s)
- Konrad Müller
- Institut für Troposphärenforschung, Permoserstr. 15, 04318 Leipzig, Germany.
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Abstract
A capillary electrophoresis-tandem mass spectrometry (CE-MS/MS) approach has been developed for routine application in proteomic studies. Robustness of the coupling is achieved by using a standard coaxial sheath-flow sprayer. Thereby, greater stability than nanoelectrospray ionization-mass spectrometry coupling of sheathless capillary electrophoresis or nanoliquid chromatography (nano-LC) is achieved, resulting in stable operation for several weeks and unattended overnight sequences. The applied sheath flow is reduced to 1-2 microL/min in order to increase sensitivity. Standard peptides and those of digests of standard proteins and gel-separated proteins can be detected in the low femtomole range (full scan and MS/MS). Detection limits are found to be as low as 500 amol. Low femtomole amounts are required for unequivocal identification by MS/MS experiments in the ion trap and subsequent database search. By applying a simple pH-mediated stacking the concentration sensitivity can be lowered to some tens of fmol/microL (nM), depending on capillary size. This sensitivity is close to published values for sheathless CE-MS and nano-LC-MS, respectively (a comparison to reference values is presented). Moreover, with capillaries of about 50 cm in length separations in less than 10 min are possible resulting in a throughput of up to four analyses per hour. This is a factor of 4-12 times faster than nano-LC separation, being the state-of-the-art techniques for proteomic studies.
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Macht M, Pelzing M, Palloch P, Sauerland V, Volz J. Mass spectrometric analysis of head-to-tail connected cyclic peptides. Acta Biochim Pol 2002; 48:1109-12. [PMID: 11995974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Tandem mass spectrometry is an extremely useful tool for high sensitive sequence identification of peptides. In the case of cyclic peptides fragmentation can easily be performed for sequence analysis. However, analysis is usually tedious due to the lack of a defined beginning and end of the sequence. Since cyclic peptides are a highly interesting class of compounds especially for the pharmaceutical industry, ways have to be found to identify their strictures. In this work we demonstrate how software and dedicated analytical strategies can be used for detailed analysis of these substances.
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Affiliation(s)
- M Macht
- Bruker Saxonia Analytik GmbH, Leipzig, Germany.
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Abstract
Tandem mass spectrometry is an extremely useful tool for high sensitive sequence identification of peptides. In the case of cyclic peptides fragmentation can easily be performed for sequence analysis. However, analysis is usually tedious due to the lack of a defined beginning and end of the sequence. Since cyclic peptides are a highly interesting class of compounds especially for the pharmaceutical industry, ways have to be found to identify their strictures. In this work we demonstrate how software and dedicated analytical strategies can be used for detailed analysis of these substances.
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Neusüss C, Pelzing M, Plewka A, Herrmann H. A new analytical approach for size-resolved speciation of organic compounds in atmospheric aerosol particles: Methods and first results. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/1999jd901038] [Citation(s) in RCA: 120] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Bauer S, Wolff I, Werner N, Schmidt R, Blume R, Pelzing M. Toxicological investigations in the semiconductor industry: IV. Studies on the subchronic oral toxicity and genotoxicity of vacuum pump oils contaminated by waste products from aluminum plasma etching processes. Toxicol Ind Health 1995; 11:523-41. [PMID: 8677517 DOI: 10.1177/074823379501100506] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Dry etching processes in semiconductor manufacturing use ionized gases in closed reactors at pressures below 1 torr. Vacuum pump systems that service the reaction chambers are potential sources of exposure to complex mixtures of inorganic and organic compounds. These mixtures consist of unused process gases and process by-products that condense and accumulate in the vacuum pump oils. To evaluate potential hazards of dry etch vacuum equipment, a contaminated vacuum pump oil sample from a BCl3/Cl2 etching process was analyzed. The waste oil was administered by gavage for 14 or 28 days to male and female Wistar rats. Neither death nor behavioral changes occurred after subchronic treatment or during a 14-day posttreatment period. Only slight effects on body weights, clinical chemistry, and hematology data were seen in the exposed animals, although the livers of all waste oil-exposed rats of both sexes showed remarkable hypertrophic degenerations. Genotoxicological investigations were performed through the Ames assay (Salmonella assay) and the Micronucleus assay. The contaminated oil sample caused clear genotoxic effects in both test systems.
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Affiliation(s)
- S Bauer
- Department of Environmental Toxicology, Martin Luther University Halle-Wittenberg, Germany
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Schmidt R, Scheufler H, Bauer S, Wolff L, Pelzing M, Herzschuh R. Toxicological investigations in the semiconductor industry: III: Studies on prenatal toxicity caused by waste products from aluminum plasma etching processes. Toxicol Ind Health 1995; 11:49-61. [PMID: 7652751 DOI: 10.1177/074823379501100105] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The prenatal toxic effects of contaminated vacuum pump oil (Sample A) and solid waste products (Samples B and C) originating from aluminum plasma etching processes in semiconductor manufacturing were investigated. Three strains of pregnant mice with different degrees of sensitivity during organogenesis (days 6-15 of gestation) were treated daily with 1000 mglkg b.w. (Sample A), 500 or 750 mg/kg b.w. (Sample B), and 250, 500, or 750 mg/kg b.w. (Sample C). On day 18 of pregnancy, the animals were killed and examined for gross changes, number and weight of live fetuses, as well as the number of postimplantation losses and malformations. Analytical data showed that the investigated wastes contained various halogenated hydrocarbons and inorganic compounds. Sample A revealed no signs of prenatal toxic action. In contrast, administration of Samples B and C caused strong prenatal toxic effects. The number of live fetuses declined in a dose--related manner, and evidence of intrauterine growth retardation was noted in fetuses that survived to day 18. The number of fetuses with malformations (only cleft palates) rose significantly in accordance with the doses and sensitivity of the strains (> 95 % of the fetuses of the most sensitive strain after 750 mg/kg; 85% after 500 mg/kg).
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Affiliation(s)
- R Schmidt
- Institute of Human Genetics and Medical Biology Martin Luther University Halle, Germany
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