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Levy IK, Salustro D, Battaglini F, Lizarraga L, Murgida DH, Agusti R, D’Accorso N, Raventos Segura D, González Palmén L, Negri RM. Quantification of Enzymatic Biofilm Removal Using the Sauerbrey Equation: Application to the Case of Pseudomonas protegens. ACS OMEGA 2024; 9:10445-10458. [PMID: 38463305 PMCID: PMC10918834 DOI: 10.1021/acsomega.3c08475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 11/30/2023] [Accepted: 01/03/2024] [Indexed: 03/12/2024]
Abstract
A methodology for the quantitative analysis of enzymatic removal of biofilms (BF) was developed, based on a quartz crystal microbalance (QCM) under stationary conditions. This was applied to the case of Pseudomonas protegens (PP) BFs, through a series of five enzymes, whose removal activity was screened using the presented methodology. The procedure is based on the following: when BFs can be modeled as rigid materials, QCM can be used as a balance under stationary conditions for determining the BFs mass reduction by enzymatic removal. For considering a BF as a rigid model, energy dissipation effects, associated with viscoelastic properties of the BF, must be negligible. Hence, a QCM system with detection of dissipation (referred to as QCM with dissipation) was used for evaluating the energy losses, which, in fact, resulted in negligible energy losses in the case of dehydrated PP BFs, validating the application of the Sauerbrey equation for the change of mass calculations. The stationary methodology reduces operating times and simplifies data analysis in comparison to dynamic approaches based on flow setups, which requires the incorporation of dissipation effects due to the liquid media. By carrying out QCM, glycosidase-type enzymes showed BF removal higher than 80% at enzyme concentration 50 ppm, reaching removal over 90% in the cases of amylase and cellulase/xylanase enzymes. The highest removal percentage produced a reduction from about 15 to 1 μg in the BF mass. Amylase enzyme was tested from below 50 to 1 ppm, reaching around 60% of removal at 1 ppm. The obtained results were supported by other instrumental techniques such as Raman spectroscopy, attenuated total reflection Fourier transform infrared spectroscopy, atomic force microscopy, high performance anion exchange chromatography, thermogravimetric analysis, and differential scanning calorimetry. The removal quantifications obtained with QCM were compared with those obtained by well-established screening techniques (UV-vis spectrophotometry using crystal violet and agar diffusion test). The proposed methodology expands the possibility of using a quartz microbalance to perform enzymatic activity screening.
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Affiliation(s)
- Ivana K. Levy
- Instituto
de Química Física de los Materiales, Medio Ambiente
y Energía (INQUIMAE). Consejo Nacional de Investigaciones Científicas
y Técnicas (CONICET), Universidad de Buenos Aires (UBA), Buenos Aires C1428EGA, Argentina
| | - Débora Salustro
- Instituto
de Química Física de los Materiales, Medio Ambiente
y Energía (INQUIMAE). Consejo Nacional de Investigaciones Científicas
y Técnicas (CONICET), Universidad de Buenos Aires (UBA), Buenos Aires C1428EGA, Argentina
| | - Fernando Battaglini
- Instituto
de Química Física de los Materiales, Medio Ambiente
y Energía (INQUIMAE). Consejo Nacional de Investigaciones Científicas
y Técnicas (CONICET), Universidad de Buenos Aires (UBA), Buenos Aires C1428EGA, Argentina
- Universidad
de Buenos Aires (UBA), Departamento de Química Inorgánica,
Analítica y Química Física. Facultad de Ciencias
Exactas y Naturales, Buenos Aires C1428EGA, Argentina
| | - Leonardo Lizarraga
- Universidad
de Buenos Aires (UBA), Departamento de Química Inorgánica,
Analítica y Química Física. Facultad de Ciencias
Exactas y Naturales, Buenos Aires C1428EGA, Argentina
- Centro
de Investigación en Bionanociencias (CIBION), Consejo Nacional
de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires C1425FQD, Argentina
| | - Daniel H. Murgida
- Instituto
de Química Física de los Materiales, Medio Ambiente
y Energía (INQUIMAE). Consejo Nacional de Investigaciones Científicas
y Técnicas (CONICET), Universidad de Buenos Aires (UBA), Buenos Aires C1428EGA, Argentina
- Universidad
de Buenos Aires (UBA), Departamento de Química Inorgánica,
Analítica y Química Física. Facultad de Ciencias
Exactas y Naturales, Buenos Aires C1428EGA, Argentina
| | - Rosalía Agusti
- Centro
de Investigaciones en Hidratos de Carbono (CIHIDECAR), Consejo Nacional
de Investigaciones Científicas y Técnicas (CONICET),
Universidad de Buenos Aires, Buenos
Aires C1428EGA, Argentina
- Universidad
de Buenos Aires (UBA), Departamento de Química Orgánica,
Facultad de Ciencias Exactas y Naturales, Buenos Aires C1428EGA, Argentina
| | - Norma D’Accorso
- Centro
de Investigaciones en Hidratos de Carbono (CIHIDECAR), Consejo Nacional
de Investigaciones Científicas y Técnicas (CONICET),
Universidad de Buenos Aires, Buenos
Aires C1428EGA, Argentina
- Universidad
de Buenos Aires (UBA), Departamento de Química Orgánica,
Facultad de Ciencias Exactas y Naturales, Buenos Aires C1428EGA, Argentina
| | | | | | - R. Martín Negri
- Instituto
de Química Física de los Materiales, Medio Ambiente
y Energía (INQUIMAE). Consejo Nacional de Investigaciones Científicas
y Técnicas (CONICET), Universidad de Buenos Aires (UBA), Buenos Aires C1428EGA, Argentina
- Universidad
de Buenos Aires (UBA), Departamento de Química Inorgánica,
Analítica y Química Física. Facultad de Ciencias
Exactas y Naturales, Buenos Aires C1428EGA, Argentina
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Electric Double Layer: The Good, the Bad, and the Beauty. ELECTROCHEM 2022. [DOI: 10.3390/electrochem3040052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
The electric double layer (EDL) is the most important region for electrochemical and heterogeneous catalysis. Because of it, its modeling and investigation are something that can be found in the literature for a long time. However, nowadays, it is still a hot topic of investigation, mainly because of the improvement in simulation and experimental techniques. The present review aims to present the classical models for the EDL, as well as presenting how this region affects electrochemical data in everyday experimentation, how to obtain and interpret information about EDL, and, finally, how to obtain some molecular point of view insights on it.
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Saroha B, Kumar A, Raman Maurya R, Lal M, Kumar S, Kumar Rajor H, Bahadur I, Singh Negi D. Adsorption of cysteine on metal(II) octacynaomolybdate(IV) at different pH values: Surface complexes characterization by FT-IR, SEM with EDXA, CHNS and Langmuir isotherm analysis. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118197] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abdou JM, Seidel P, Sterrer M. Bonding and thermal stability of cysteine on single-crystalline iron oxide surfaces and Pt(111). J Chem Phys 2020; 152:064701. [DOI: 10.1063/1.5143416] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
| | - Peter Seidel
- Institute of Physics, University of Graz, Universitätsplatz 5, A-8010 Graz, Austria
| | - Martin Sterrer
- Institute of Physics, University of Graz, Universitätsplatz 5, A-8010 Graz, Austria
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Engelbrekt C, Nazmutdinov RR, Zinkicheva TT, Glukhov DV, Yan J, Mao B, Ulstrup J, Zhang J. Chemistry of cysteine assembly on Au(100): electrochemistry, in situ STM and molecular modeling. NANOSCALE 2019; 11:17235-17251. [PMID: 31418761 DOI: 10.1039/c9nr02477h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Cysteine (Cys) is an essential amino acid with a carboxylic acid, an amine and a thiol group. We have studied the surface structure and adsorption dynamics of l-cysteine adlayers on Au(100) from aqueous solution using electrochemistry, high-resolution electrochemical scanning tunnelling microscopy (in situ STM), and molecular modelling. Cys adsorption on this low-index Au-surface has been much less studied than Cys adsorption on Au(111)- and Au(110)-electrode surfaces. Chronopotentiometry was employed to monitor the adsorption dynamics at sub-second resolution and showed that adsorption is completed in 30 minutes at Cys concentrations above 100 μM. Two consecutive steps could be fitted to these data. Two separate reductive desorption peaks of Cys adlayers on Au(100) with a total coverage of 2.52 (±0.15) × 10-10 mol cm-2 were observed. In situ STM showed that the adsorbed Cys is organized in stripes with "fork-like" features which co-exist in (11 × 2)-2Cys and (7 × 2)-2Cys lattices, quite differently from Cys adsorption on Au(111)-electrode surfaces. Stripe structures with bright STM contrast in the center suggest that a second Cys adlayer on top of a first adlayer is formed, supporting the dual-peak reductive desorption of Cys adlayers. In addition, monolayers of both pure l-Cys and pure d-Cys and a 1 : 1 racemic mixture of l- and d-Cys on Au(100) were studied. Virtually identical macroscopic electrochemical features were found, but in situ STM discloses many more defects for the racemic mixture than for the pure enantiomers due to structural mismatch of l- and d-Cys. Density functional theory (DFT) calculations combined with a cluster model for the Au(100) surface were carried out to investigate the adsorption energy and geometry of the adsorbed monomer and dimer Cys species in different orientations, with detailed attention to the chirality effects. Optimized DFT geometries were used to construct model STM images, and kinetic Monte Carlo simulations undertaken to illuminate the growth of adsorbate rows and the mechanism of the adlayer formation as well as the Cys adsorption patterns specific to the Au(100)-electrode surface.
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Affiliation(s)
- Christian Engelbrekt
- Department of Chemistry, Building 207, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark.
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Dourado AHB, Munhos RL, Silva NA, Colle VD, Carvalho GGA, Oliveira PV, Arenz M, Varela H, Córdoba de Torresi SI. Opportunities and Knowledge Gaps of SO2 Electrocatalytic Oxidation for H2 Electrochemical Generation. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01336] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- André H. B. Dourado
- Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 05508-080 São Paulo, São Paulo, Brazil
| | - Renan L. Munhos
- Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 05508-080 São Paulo, São Paulo, Brazil
| | - Norberto A. Silva
- Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 05508-080 São Paulo, São Paulo, Brazil
| | - Vinícius Del Colle
- Departamento de Química, Universidade Federal de Alagoas−Campus Arapiraca, Av. Manoel Severino Barbosa, 57309-005 Arapiraca, Alagoas, Brazil
- Instituto de Química de São Carlos, Universidade de São Paulo, C.P. 780, CEP 13560-970, São Carlos, São Paulo, Brazil
| | - Gabriel G. A. Carvalho
- Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 05508-080 São Paulo, São Paulo, Brazil
| | - Pedro V. Oliveira
- Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 05508-080 São Paulo, São Paulo, Brazil
| | - Matthias Arenz
- Department of Chemistry and Biochemistry, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Hamilton Varela
- Instituto de Química de São Carlos, Universidade de São Paulo, C.P. 780, CEP 13560-970, São Carlos, São Paulo, Brazil
| | - Susana I. Córdoba de Torresi
- Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 05508-080 São Paulo, São Paulo, Brazil
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Dourado AHB, Arenz M, Córdoba de Torresi SI. Mechanism of Electrochemical L‐Cysteine Oxidation on Pt. ChemElectroChem 2019. [DOI: 10.1002/celc.201801575] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- André H. B. Dourado
- Instituto de QuímicaUniversidade de São Paulo Av. Prof. Lineu Prestes 05508-080 São Paulo – SP Brazil
| | - Matthias Arenz
- Chemistry departamentKøbenhavn Universitet Universistetsparken 5 2100 Copenhagen, Denmark
- Present address: Department of Chemistry and BiochemistryUniversität Bern Freiestrasse 3 CH – 3012 Bern Switzerland
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