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Kollhoff L, Kipping M, Rauh M, Ceglarek U, Barka G, Barka F, Sinz A. Development of a rapid and specific MALDI-TOF mass spectrometric assay for SARS-CoV-2 detection. Clin Proteomics 2023; 20:26. [PMID: 37393264 DOI: 10.1186/s12014-023-09415-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 06/19/2023] [Indexed: 07/03/2023] Open
Abstract
We have developed a rapid and highly specific assay for detecting and monitoring SARS-CoV-2 infections by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS). As MALDI-TOF mass spectrometers are available in a clinical setting, our assay has the potential to serve as alternative to the commonly used reverse transcriptase quantitative polymerase chain reaction (RT-qPCR). Sample preparation prior to MALDI-TOF-MS involves the tryptic digestion of SARS-CoV-2 proteins, followed by an enrichment of virus-specific peptides from SARS-CoV-2 nucleoprotein via magnetic antibody beads. Our MALDI-TOF-MS method allows the detection of SARS-CoV-2 nucleoprotein in sample collection medium as low as 8 amol/µl. MALDI-TOF mass spectra are obtained in just a few seconds, which makes our MS-based assay suitable for a high-throughput screening of SARS-CoV-2 in healthcare facilities in addition to PCR. Due to the specific detection of virus peptides, different SARS-CoV-2 variants are readily distinguished from each other. Specifically, we show that our MALDI-TOF-MS assay discriminates SARS-CoV-2 strain B.1.617.2 "delta variant" from all other variants in patients' samples, making our method highly valuable to monitor the emergence of new virus variants.
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Affiliation(s)
- Lydia Kollhoff
- Department of Pharmaceutical Chemistry and Bioanalytics, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Str. 3, D-06120, Halle (Saale), Germany
- Center for Structural Mass Spectrometry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Str. 3, D-06120, Halle (Saale), Germany
| | - Marc Kipping
- Department of Pharmaceutical Chemistry and Bioanalytics, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Str. 3, D-06120, Halle (Saale), Germany
- Center for Structural Mass Spectrometry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Str. 3, D-06120, Halle (Saale), Germany
| | - Manfred Rauh
- Department of Pediatrics and Adolescent Medicine, Friedrich Alexander University, Erlangen-Nürnberg, Germany
| | - Uta Ceglarek
- Institute for Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, University of Leipzig, Leipzig, Germany
| | - Günes Barka
- SunChrom Wissenschaftliche Geräte GmbH, 61381, Friedrichsdorf, Germany
| | - Frederik Barka
- SunChrom Wissenschaftliche Geräte GmbH, 61381, Friedrichsdorf, Germany
| | - Andrea Sinz
- Department of Pharmaceutical Chemistry and Bioanalytics, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Str. 3, D-06120, Halle (Saale), Germany.
- Center for Structural Mass Spectrometry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Str. 3, D-06120, Halle (Saale), Germany.
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Lupu LM, Wiegand P, Holdschick D, Mihoc D, Maeser S, Rawer S, Völklein F, Malek E, Barka F, Knauer S, Uth C, Hennermann J, Kleinekofort W, Hahn A, Barka G, Przybylski M. Identification and Affinity Determination of Protein-Antibody and Protein-Aptamer Epitopes by Biosensor-Mass Spectrometry Combination. Int J Mol Sci 2021; 22:12832. [PMID: 34884636 PMCID: PMC8657952 DOI: 10.3390/ijms222312832] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 11/17/2021] [Accepted: 11/17/2021] [Indexed: 12/24/2022] Open
Abstract
Analytical methods for molecular characterization of diagnostic or therapeutic targets have recently gained high interest. This review summarizes the combination of mass spectrometry and surface plasmon resonance (SPR) biosensor analysis for identification and affinity determination of protein interactions with antibodies and DNA-aptamers. The binding constant (KD) of a protein-antibody complex is first determined by immobilizing an antibody or DNA-aptamer on an SPR chip. A proteolytic peptide mixture is then applied to the chip, and following removal of unbound material by washing, the epitope(s) peptide(s) are eluted and identified by MALDI-MS. The SPR-MS combination was applied to a wide range of affinity pairs. Distinct epitope peptides were identified for the cardiac biomarker myoglobin (MG) both from monoclonal and polyclonal antibodies, and binding constants determined for equine and human MG provided molecular assessment of cross immunoreactivities. Mass spectrometric epitope identifications were obtained for linear, as well as for assembled ("conformational") antibody epitopes, e.g., for the polypeptide chemokine Interleukin-8. Immobilization using protein G substantially improved surface fixation and antibody stabilities for epitope identification and affinity determination. Moreover, epitopes were successfully determined for polyclonal antibodies from biological material, such as from patient antisera upon enzyme replacement therapy of lysosomal diseases. The SPR-MS combination was also successfully applied to identify linear and assembled epitopes for DNA-aptamer interaction complexes of the tumor diagnostic protein C-Met. In summary, the SPR-MS combination has been established as a powerful molecular tool for identification of protein interaction epitopes.
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Affiliation(s)
- Loredana-Mirela Lupu
- Centre for Analytical Biochemistry and Biomedical Mass Spectrometry (AffyMSLifeChem), and Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry, Marktstrasse 29, 65428 Rüsselsheim am Main, Germany; (L.-M.L.); (P.W.); (D.H.); (D.M.); (S.M.); (S.R.); (E.M.); (W.K.)
| | - Pascal Wiegand
- Centre for Analytical Biochemistry and Biomedical Mass Spectrometry (AffyMSLifeChem), and Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry, Marktstrasse 29, 65428 Rüsselsheim am Main, Germany; (L.-M.L.); (P.W.); (D.H.); (D.M.); (S.M.); (S.R.); (E.M.); (W.K.)
| | - Daria Holdschick
- Centre for Analytical Biochemistry and Biomedical Mass Spectrometry (AffyMSLifeChem), and Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry, Marktstrasse 29, 65428 Rüsselsheim am Main, Germany; (L.-M.L.); (P.W.); (D.H.); (D.M.); (S.M.); (S.R.); (E.M.); (W.K.)
- Department of Engineering & Institute for Microtechnologies (IMTECH), RheinMain University, 65428 Rüsselsheim am Main, Germany;
| | - Delia Mihoc
- Centre for Analytical Biochemistry and Biomedical Mass Spectrometry (AffyMSLifeChem), and Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry, Marktstrasse 29, 65428 Rüsselsheim am Main, Germany; (L.-M.L.); (P.W.); (D.H.); (D.M.); (S.M.); (S.R.); (E.M.); (W.K.)
| | - Stefan Maeser
- Centre for Analytical Biochemistry and Biomedical Mass Spectrometry (AffyMSLifeChem), and Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry, Marktstrasse 29, 65428 Rüsselsheim am Main, Germany; (L.-M.L.); (P.W.); (D.H.); (D.M.); (S.M.); (S.R.); (E.M.); (W.K.)
| | - Stephan Rawer
- Centre for Analytical Biochemistry and Biomedical Mass Spectrometry (AffyMSLifeChem), and Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry, Marktstrasse 29, 65428 Rüsselsheim am Main, Germany; (L.-M.L.); (P.W.); (D.H.); (D.M.); (S.M.); (S.R.); (E.M.); (W.K.)
| | - Friedemann Völklein
- Department of Engineering & Institute for Microtechnologies (IMTECH), RheinMain University, 65428 Rüsselsheim am Main, Germany;
| | - Ebrahim Malek
- Centre for Analytical Biochemistry and Biomedical Mass Spectrometry (AffyMSLifeChem), and Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry, Marktstrasse 29, 65428 Rüsselsheim am Main, Germany; (L.-M.L.); (P.W.); (D.H.); (D.M.); (S.M.); (S.R.); (E.M.); (W.K.)
- Department of Engineering & Institute for Microtechnologies (IMTECH), RheinMain University, 65428 Rüsselsheim am Main, Germany;
| | - Frederik Barka
- Sunchrom GmbH, Industriestr. 18, 61381 Friedrichsdorf, Germany; (F.B.); (G.B.)
| | - Sascha Knauer
- Sulfotools GmbH, Bahnhofsplatz 1, 65428 Rüsselsheim am Main, Germany; (S.K.); (C.U.)
| | - Christina Uth
- Sulfotools GmbH, Bahnhofsplatz 1, 65428 Rüsselsheim am Main, Germany; (S.K.); (C.U.)
| | - Julia Hennermann
- Department of Pediatrics, Universitätsmedizin Mainz, 55130 Mainz, Germany;
| | - Wolfgang Kleinekofort
- Centre for Analytical Biochemistry and Biomedical Mass Spectrometry (AffyMSLifeChem), and Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry, Marktstrasse 29, 65428 Rüsselsheim am Main, Germany; (L.-M.L.); (P.W.); (D.H.); (D.M.); (S.M.); (S.R.); (E.M.); (W.K.)
- Department of Engineering & Institute for Microtechnologies (IMTECH), RheinMain University, 65428 Rüsselsheim am Main, Germany;
| | - Andreas Hahn
- Department of Child Neurology, Justus-Liebig-University Giessen, Feulgenstraße 10-12, 35389 Giessen, Germany;
| | - Günes Barka
- Sunchrom GmbH, Industriestr. 18, 61381 Friedrichsdorf, Germany; (F.B.); (G.B.)
| | - Michael Przybylski
- Centre for Analytical Biochemistry and Biomedical Mass Spectrometry (AffyMSLifeChem), and Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry, Marktstrasse 29, 65428 Rüsselsheim am Main, Germany; (L.-M.L.); (P.W.); (D.H.); (D.M.); (S.M.); (S.R.); (E.M.); (W.K.)
- Department of Engineering & Institute for Microtechnologies (IMTECH), RheinMain University, 65428 Rüsselsheim am Main, Germany;
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Mihoc D, Lupu LM, Wiegand P, Kleinekofort W, Müller O, Völklein F, Glocker MO, Barka F, Barka G, Przybylski M. Antibody Epitope and Affinity Determination of the Myocardial Infarction Marker Myoglobin by SPR-Biosensor Mass Spectrometry. J Am Soc Mass Spectrom 2021; 32:106-113. [PMID: 32838528 DOI: 10.1021/jasms.0c00234] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Myoglobin (MG) is a biomarker for heart muscle injury, making it a potential target protein for early detection of myocardial infarction. Elevated myoglobin levels alone have low specificity for acute myocardial infarction (AMI) but in combination with cardiac troponin T have been considered highly efficient diagnostic biomarkers. Myoglobin is a monomeric heme protein with a molecular weight of 17 kDa that is found in skeletal and cardiac tissue as an intracellular storage unit of oxygen. MG consists of eight α-helices connected by loops and a heme group responsible for oxygen-binding. Monoclonal antibodies are widely used analytical tools in biomedical research and have been employed for immunoanalytical detection of MG. However, the epitope(s) recognized by MG antibodies have been hitherto unknown. Precise molecular identification of the epitope(s) recognized by antibodies is of key importance for the development of MG as a diagnostic biomarker. The epitope of a monoclonal MG antibody was identified by proteolytic epitope extraction mass spectrometry in combination with surface plasmon resonance (SPR) biosensor analysis. The MG antibody was immobilized both on an affinity microcolumn and a gold SPR chip. The SPR kinetic analysis provided an affinity-binding constant KD of 270 nM for MG. Binding of a tryptic peptide mixture followed by elution of the epitope from the SPR-MS affinity interface by mild acidification provided a single-epitope peptide located at the C-terminus [146-153] [YKELGFQG] of MG. The specificity and affinity of the epitope were ascertained by synthesis and affinity-mass spectrometric characterization of the epitope peptide.
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Affiliation(s)
- Delia Mihoc
- Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry (STZ), Marktstrasse 29, 65428 Rüsselsheim am Main, Germany
| | - Loredana-Mirela Lupu
- Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry (STZ), Marktstrasse 29, 65428 Rüsselsheim am Main, Germany
| | - Pascal Wiegand
- Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry (STZ), Marktstrasse 29, 65428 Rüsselsheim am Main, Germany
| | - Wolfgang Kleinekofort
- Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry (STZ), Marktstrasse 29, 65428 Rüsselsheim am Main, Germany
- Institute for Microtechnologies (IMTECH), Rhein Main University, 65428 Rüsselsheim am Main, Germany
| | - Oliver Müller
- Institute for Microtechnologies (IMTECH), Rhein Main University, 65428 Rüsselsheim am Main, Germany
| | - Friedemann Völklein
- Institute for Microtechnologies (IMTECH), Rhein Main University, 65428 Rüsselsheim am Main, Germany
| | - Michael O Glocker
- Department of Immunology, Proteome Centre, Medical University Rostock, Schillingallee 69, 18055 Rostock, Germany
| | - Frederik Barka
- Sunchrom GmbH, Industriestr. 27, 61381 Friedrichsdorf, Germany
| | - Günes Barka
- Sunchrom GmbH, Industriestr. 27, 61381 Friedrichsdorf, Germany
| | - Michael Przybylski
- Steinbeis Transfer Centre for Biopolymer Analysis and Biomedical Mass Spectrometry (STZ), Marktstrasse 29, 65428 Rüsselsheim am Main, Germany
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Barka F, Angstenberger M, Ahrendt T, Lorenzen W, Bode HB, Büchel C. Identification of a triacylglycerol lipase in the diatom Phaeodactylum tricornutum. Biochim Biophys Acta Mol Cell Biol Lipids 2016; 1861:239-48. [DOI: 10.1016/j.bbalip.2015.12.023] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 12/17/2015] [Accepted: 12/29/2015] [Indexed: 11/30/2022]
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Witkowski A, Barka F, Mann DG, Li C, Weisenborn JLF, Ashworth MP, Kurzydłowski KJ, Zgłobicka I, Dobosz S. A Description of Biremis panamae sp. nov., a New Diatom Species from the Marine Littoral, with an Account of the Phylogenetic Position of Biremis D.G. Mann et E.J. Cox (Bacillariophyceae). PLoS One 2014; 9:e114508. [PMID: 25494095 PMCID: PMC4262420 DOI: 10.1371/journal.pone.0114508] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 11/05/2014] [Indexed: 11/18/2022] Open
Abstract
Here we present a formal description of Biremis panamae Barka, Witkowski et Weisenborn sp. nov., which was isolated from the marine littoral environment of the Pacific Ocean coast of Panama. The description is based on morphology (light and electron microscopy) and the rbcL, psbC and SSU sequences of one clone of this species. The new species is included in Biremis due to its morphological features; i.e. two marginal rows of foramina, chambered striae, and girdle composed of numerous punctate copulae. The new species also possesses a striated valve face which is not seen in most known representatives of marine littoral Biremis species. In this study we also present the relationship of Biremis to other taxa using morphology, DNA sequence data and observations of auxosporulation. Our results based on these three sources point to an evolutionary relationship between Biremis, Neidium and Scoliopleura. The unusual silicified incunabular caps present in them are known otherwise only in Muelleria, which is probably related to the Neidiaceae and Scoliotropidaceae. We also discuss the relationship between Biremis and the recently described Labellicula and Olifantiella.
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Affiliation(s)
- Andrzej Witkowski
- Palaeoceanology Unit, Faculty of Geosciences, University of Szczecin, Mickiewicza 18, PL-70-383, Szczecin, Poland
- * E-mail:
| | - Frederik Barka
- Institute of Molecular Biosciences, Goethe University, D-60438 Frankfurt am Main, Germany
| | - David G. Mann
- Royal Botanic Garden Edinburgh, 20A Inverleith Row, Edinburgh EH3 5LR, Scotland, United Kingdom
- Aquatic Ecosystems, Institute for Food and Agricultural Research and Technology (IRTA), Crta de Poble Nou Km 5.5, E-43540 Sant Carles de la Ràpita, Catalunya, Spain
| | - Chunlian Li
- Palaeoceanology Unit, Faculty of Geosciences, University of Szczecin, Mickiewicza 18, PL-70-383, Szczecin, Poland
| | - Jascha L. F. Weisenborn
- Institute of Ecology, Evolution and Diversity, Goethe University, D-60438 Frankfurt am Main, Germany
| | - Matt P. Ashworth
- Section of Integrative Biology, Biological Laboratories, University of Texas at Austin, Austin, Texas, United States of America
| | | | - Izabela Zgłobicka
- Faculty of Engineering and Material Science, Warsaw University of Technology, Warsaw, Poland
| | - Sławomir Dobosz
- Palaeoceanology Unit, Faculty of Geosciences, University of Szczecin, Mickiewicza 18, PL-70-383, Szczecin, Poland
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