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Novak D, Viskupicova J, Zatloukalova M, Heger V, Michalikova S, Majekova M, Vacek J. Electrochemical behavior of sarco/endoplasmic reticulum Ca-ATPase in response to carbonylation processes. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.01.036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Novak D, Mojovic M, Pavicevic A, Zatloukalova M, Hernychova L, Bartosik M, Vacek J. Electrochemistry and electron paramagnetic resonance spectroscopy of cytochrome c and its heme-disrupted analogs. Bioelectrochemistry 2018; 119:136-141. [DOI: 10.1016/j.bioelechem.2017.09.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 09/19/2017] [Accepted: 09/19/2017] [Indexed: 11/30/2022]
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Vacek J, Zatloukalova M, Geleticova J, Kubala M, Modriansky M, Fekete L, Masek J, Hubatka F, Turanek J. Electrochemical Platform for the Detection of Transmembrane Proteins Reconstituted into Liposomes. Anal Chem 2016; 88:4548-56. [DOI: 10.1021/acs.analchem.6b00618] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Jan Vacek
- Department
of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacky University, Hnevotinska 3, 775 15 Olomouc, Czech Republic
| | - Martina Zatloukalova
- Department
of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacky University, Hnevotinska 3, 775 15 Olomouc, Czech Republic
| | - Jaroslava Geleticova
- Department
of Biophysics, Centre of the Region Hana for Biotechnological and
Agricultural Research, Faculty of Science, Palacky University, Slechtitelu 27, 783 71 Olomouc, Czech Republic
| | - Martin Kubala
- Department
of Biophysics, Centre of the Region Hana for Biotechnological and
Agricultural Research, Faculty of Science, Palacky University, Slechtitelu 27, 783 71 Olomouc, Czech Republic
| | - Martin Modriansky
- Department
of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacky University, Hnevotinska 3, 775 15 Olomouc, Czech Republic
| | - Ladislav Fekete
- Institute
of Physics, Academy of Sciences of the Czech Republic, Na Slovance
2, 18221 Prague, Czech Republic
| | - Josef Masek
- Department
of Pharmacology and Immunotherapy, Veterinary Research Institute, v.v.i.,
Hudcova 70, 621 00 Brno, Czech Republic
| | - Frantisek Hubatka
- Department
of Pharmacology and Immunotherapy, Veterinary Research Institute, v.v.i.,
Hudcova 70, 621 00 Brno, Czech Republic
| | - Jaroslav Turanek
- Department
of Pharmacology and Immunotherapy, Veterinary Research Institute, v.v.i.,
Hudcova 70, 621 00 Brno, Czech Republic
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Fast-scan cyclic voltammetry with thiol-modified mercury electrodes distinguishes native from denatured BSA. Electrochem commun 2015. [DOI: 10.1016/j.elecom.2015.10.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Senitkova I, Spidlova P, Stulik J. Cooperation of both, the FKBP_N-like and the DSBA-like, domains is necessary for the correct function of FTS_1067 protein involved in Francisella tularensis virulence and pathogenesis. Pathog Dis 2015; 73:ftv030. [PMID: 25896829 DOI: 10.1093/femspd/ftv030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/09/2015] [Indexed: 11/14/2022] Open
Abstract
Francisella tularensis the etiological agent of tularaemia is one of the most infectious human pathogen known. Our knowledge about its key virulence factors has increased recently but it still remains a lot to explore. One of the described essential virulence factors is membrane lipoprotein FTS_1067 (nomenclature of F. tularensis subsp. holarctica strain FSC200) with homology to the protein family of disulphide oxidoreductases DsbA. Lipoprotein consists of two different domains: the C-terminal DsbA_Com1-like domain (DSBA-like) and the N-terminal FKBP-type peptidyl-prolyl cis/trans isomerases (FKBP_N-like). To uncover the biological role of these domains, we created bacterial strain with deletion of the DSBA-like domain. This defect in gene coding for lipoprotein FTS_1067 led to high in vivo attenuation associated with the ability to induce host protective immunity. Analyses performed with the truncated recombinant protein showed that the absence of DSBA-like domain revealed the loss of thiol/disulphide oxidoreductase activity and, additionally, confirmed the role of the FKBP_N-like domain in the FTS_1067 oligomerization and chaperone-like function. Finally, we verified that only full-length form of FTS_1067 recombinant protein possesses the isomerase activity. Based on our results, we proposed that for the correct FTS_1067 protein function both domains are needed.
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Affiliation(s)
- Iva Senitkova
- Faculty of Military Health Sciences, University of Defence, Department of Molecular Pathology and Biology, Trebesska 1575, Hradec Kralove 50001, Czech Republic
| | - Petra Spidlova
- Faculty of Military Health Sciences, University of Defence, Department of Molecular Pathology and Biology, Trebesska 1575, Hradec Kralove 50001, Czech Republic
| | - Jiri Stulik
- Faculty of Military Health Sciences, University of Defence, Department of Molecular Pathology and Biology, Trebesska 1575, Hradec Kralove 50001, Czech Republic
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Paleček E, Tkáč J, Bartošík M, Bertók T, Ostatná V, Paleček J. Electrochemistry of nonconjugated proteins and glycoproteins. Toward sensors for biomedicine and glycomics. Chem Rev 2015; 115:2045-108. [PMID: 25659975 PMCID: PMC4360380 DOI: 10.1021/cr500279h] [Citation(s) in RCA: 214] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Indexed: 02/07/2023]
Affiliation(s)
- Emil Paleček
- Institute
of Biophysics Academy of Science of the Czech Republic, v.v.i., Královopolská
135, 612 65 Brno, Czech Republic
| | - Jan Tkáč
- Institute
of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
| | - Martin Bartošík
- Regional
Centre for Applied Molecular Oncology, Masaryk
Memorial Cancer Institute, Žlutý kopec 7, 656 53 Brno, Czech Republic
| | - Tomáš Bertók
- Institute
of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
| | - Veronika Ostatná
- Institute
of Biophysics Academy of Science of the Czech Republic, v.v.i., Královopolská
135, 612 65 Brno, Czech Republic
| | - Jan Paleček
- Central
European Institute of Technology, Masaryk
University, Kamenice
5, 625 00 Brno, Czech Republic
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Havlikova M, Zatloukalova M, Ulrichova J, Dobes P, Vacek J. Electrocatalytic assay for monitoring methylglyoxal-mediated protein glycation. Anal Chem 2015; 87:1757-63. [PMID: 25539570 DOI: 10.1021/ac503705d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Protein glycation is a complex process that plays an important role in diabetes mellitus, aging, and the regulation of protein function in general. As a result, current methodological research on proteins is focused on the development of novel approaches for investigating glycation and the possibility of monitoring its modulation and selective inhibition. In this paper, a first sensing strategy for protein glycation is proposed, based on protein electroactivity measurement. Concretely, the label-free method proposed is based on the application of a constant-current chronopotentiometric stripping (CPS) analysis at Hg-containing electrodes. The glycation process was monitored as the decrease in the electrocatalytic protein signal, peak H, observed at highly negative potentials at around -1.8 V (vs Ag/AgCl3 M KCl), which was previously ascribed to a catalytic hydrogen evolution reaction (CHER). Using this method, a model protein bovine serum albumin was investigated over 3 days of incubation with the glycation agent methylglyoxal in the absence or presence of the glycation inhibitor aminoguanidine (pimagedine). The electrochemical methodology presented here could open up new possibilities in research on protein glycation and oxidative modification. The methodology developed also provides a new option for the analysis of protein intermolecular interactions using electrochemical sensors, which was demonstrated by the application of a silver solid amalgam electrode (AgSAE) for monitoring the glycation process in samples of bovine serum albumin, human serum albumin, and lysozyme.
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Affiliation(s)
- Marika Havlikova
- Department of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacky University , Hnevotinska 3, 775 15 Olomouc, Czech Republic
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Ren G, Champion MM, Huntley JF. Identification of disulfide bond isomerase substrates reveals bacterial virulence factors. Mol Microbiol 2014; 94:926-44. [PMID: 25257164 DOI: 10.1111/mmi.12808] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/23/2014] [Indexed: 01/22/2023]
Abstract
Bacterial pathogens are exposed to toxic molecules inside the host and require efficient systems to form and maintain correct disulfide bonds for protein stability and function. The intracellular pathogen Francisella tularensis encodes a disulfide bond formation protein ortholog, DsbA, which previously was reported to be required for infection of macrophages and mice. However, the molecular mechanisms by which F. tularensis DsbA contributes to virulence are unknown. Here, we demonstrate that F. tularensis DsbA is a bifunctional protein that oxidizes and, more importantly, isomerizes complex disulfide connectivity in substrates. A single amino acid in the conserved cis-proline loop of the DsbA thioredoxin domain was shown to modulate both isomerase activity and F. tularensis virulence. Trapping experiments in F. tularensis identified over 50 F. tularensis DsbA substrates, including outer membrane proteins, virulence factors, and many hypothetical proteins. Six of these hypothetical proteins were randomly selected and deleted, revealing two novel proteins, FTL_1548 and FTL_1709, which are required for F. tularensis virulence. We propose that the extreme virulence of F. tularensis is partially due to the bifunctional nature of DsbA, that many of the newly identified substrates are required for virulence, and that the development of future DsbA inhibitors could have broad anti-bacterial implications.
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Affiliation(s)
- Guoping Ren
- Department of Medical Microbiology and Immunology, University of Toledo College of Medicine and Life Sciences, Toledo, OH, 43614, USA
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