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Acar M, Tatini D, Budroni MA, Ninham BW, Rustici M, Rossi F, Lo Nostro P. Specific anion effects on urease activity: A Hofmeister study. Colloids Surf B Biointerfaces 2024; 236:113789. [PMID: 38367291 DOI: 10.1016/j.colsurfb.2024.113789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 01/24/2024] [Accepted: 02/04/2024] [Indexed: 02/19/2024]
Abstract
The effects of a range of electrolytes on the hydrolysis of urea by the enzyme urease is explored. The autocatalytic behavior of urease in unbuffered solutions and its pH clock reactions are studied. The concentration dependence of the experimental variables is analyzed in terms of specific ion-enzyme interactions and hydration. The results offer insights into the molecular mechanisms of the enzyme, and on the nature of its interactions with the electrolytes. We found that urease can tolerate mild electrolytes in its environment, while it is strongly inhibited by both strong kosmotropic and strong chaotropic anions. This study may cast light on an alternative therapy for Helicobacter pylori infections and contribute to the design of innovative materials and provide new approaches for the modulation of the enzymatic activity.
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Affiliation(s)
- Mert Acar
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, Sesto Fiorentino, Firenze 50019, Italy
| | - Duccio Tatini
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, Sesto Fiorentino, Firenze 50019, Italy
| | - Marcello A Budroni
- Department of Chemistry and Pharmacy, University of Sassari, Sassari 07100, Italy
| | - Barry W Ninham
- Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, Australia
| | - Mauro Rustici
- Department of Chemistry and Pharmacy, University of Sassari, Sassari 07100, Italy
| | - Federico Rossi
- Department of Earth, Environmental and Physical Sciences-DEEP Sciences, University of Siena, Italy
| | - Pierandrea Lo Nostro
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, Sesto Fiorentino, Firenze 50019, Italy.
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2
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Tran DBA, Edwards EGP, Tew DP, Peverall R, Ritchie GAD. Continuous-wave cavity ringdown for high-sensitivity polarimetry and magnetometry measurements. J Chem Phys 2024; 160:054201. [PMID: 38299626 DOI: 10.1063/5.0187832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 01/11/2024] [Indexed: 02/02/2024] Open
Abstract
We report the development of a novel variant of cavity ringdown polarimetry using a continuous-wave laser operating at 532 nm for highly precise chiroptical activity and magnetometry measurements. The key methodology of the apparatus relies upon the external modulation of the laser frequency at the frequency splitting between non-degenerate left- and right-circularly polarized cavity modes. The method is demonstrated by the evaluation of the Verdet constants of crystalline CeF3 and fused silica, in addition to the observation of gas- and solution-phase optical rotations of selected chiral molecules. Specifically, optical rotations of (i) vapors of α-pinene and R-(+)-limonene, (ii) mutarotating D-glucose in water, and (iii) acidified L-histidine solutions are determined. The detection sensitivities for the gas- and solution-phase chiral activity measurements are ∼30 and ∼120μdeg over a 30 s detection period per cavity round trip pass, respectively. Furthermore, the measured optical rotations for R-(+)-limonene are compared with computations performed using the TURBOMOLE quantum chemistry package. The experimentally observed optically rotatory dispersion of this cyclic monoterpene was thus rationalized via a consideration of its room temperature conformer distribution as determined by the aforementioned single-point energy calculations.
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Affiliation(s)
- Dang-Bao-An Tran
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - Evan G P Edwards
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - David P Tew
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - Robert Peverall
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - Grant A D Ritchie
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
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3
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Sorfleet JT, Shin JW. Polarimetry study of the intrinsic rotation of (1R,4R)-(+)-camphor in organic solvents. Chem Phys 2023. [DOI: 10.1016/j.chemphys.2023.111904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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4
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Tatini D, Anselmi E, Cabrucci G, Acar M, Ninham BW, Lo Nostro P. Ionochromism, solvatochromism and effect of dissolved gases on the spectral properties of bromothymol blue. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Galeano Carrano RS, Provasi PF, Ferraro MB, Alkorta I, Elguero J, Sauer SPA. A Density Functional Theory Study of Optical Rotation in Some Aziridine and Oxirane Derivatives. Chemphyschem 2021; 22:764-774. [PMID: 33528071 DOI: 10.1002/cphc.202001010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 02/01/2021] [Indexed: 12/25/2022]
Abstract
We present time-dependent density functional theory (TDDFT) calculations of the electronic optical rotation (ORP) for seven oxirane and two aziridine derivatives in the gas phase and in solution and compare the results with the available experimental values. For seven of the studied molecules it is the first time that their optical rotation was studied theoretically and we have therefore investigated the influence of several settings in the TDDFT calculations on the results. This includes the choice of the one-electron basis set, the exchange-correlation functional or the particular polarizable continuum model (PCM). We can confirm that polarized quadruple zeta basis sets augmented with diffuse functions are necessary for converged results and find that the aug-pc-3 basis set is a viable alternative to the frequently employed aug-cc-pVQZ basis set. Based on our study, we cannot recommend the generalized gradient functional KT3 for calculations of the ORP in these compounds, whereas the hybrid functional PBE0 gives results quite similar to the long-range correct CAM-B3LYP functional. Finally, we observe large differences in the solvent effects predicted by the integral equation formalism of PCM and the SMD variant of PCM. For the majority of solute/solvent combinations in this study, we find that the SMD model in combination with the PBE0 functional and the aug-pc-3 basis set gives the best agreement with the experimental values.
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Affiliation(s)
- Ramiro S Galeano Carrano
- Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones, Posadas, Argentina
| | - Patricio F Provasi
- Department of Physics, IMIT, Northeastern University, CONICET, Corrientes, Argentina
| | - Marta B Ferraro
- Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires and IFIBA, CONICET, Buenos Aires, Argentina
| | - Ibon Alkorta
- Instituto de Química Médica (C.S.I.C.), Madrid, Spain
| | - José Elguero
- Instituto de Química Médica (C.S.I.C.), Madrid, Spain
| | - Stephan P A Sauer
- Department of Chemistry, University of Copenhagen, Copenhagen, Denmark
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Bolek S, Ignatowska J. Ring opening reactions of cyclic sulfamidates. Synthesis of β-fluoroaryl alanines and derivatives of 4,4-difluoroglutamic acid. J Fluor Chem 2019. [DOI: 10.1016/j.jfluchem.2018.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Andreev M, Chremos A, de Pablo J, Douglas JF. Coarse-Grained Model of the Dynamics of Electrolyte Solutions. J Phys Chem B 2017; 121:8195-8202. [DOI: 10.1021/acs.jpcb.7b04297] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marat Andreev
- Institute
of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
- Center for Hierarchical Materials Design, Evanston, Illinois 60208, United States
| | - Alexandros Chremos
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Juan de Pablo
- Institute
of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Jack F. Douglas
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
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Ferreira LA, Loureiro JA, Gomes J, Uversky VN, Madeira PP, Zaslavsky BY. Why physicochemical properties of aqueous solutions of various compounds are linearly interrelated. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.05.068] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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9
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Interrelationship between partition behavior of organic compounds and proteins in aqueous dextran-polyethylene glycol and polyethylene glycol-sodium sulfate two-phase systems. J Chromatogr A 2016; 1443:21-5. [DOI: 10.1016/j.chroma.2016.03.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 03/14/2016] [Accepted: 03/14/2016] [Indexed: 01/01/2023]
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10
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Xiong J, Huang Y, Wu XY, Liu XH, Fan H, Wang W, Zhao Y, Yang GX, Zhang HY, Hu JF. Chemical Constituents from the Fermented Mycelia of the Medicinal FungusXylaria nigripes. Helv Chim Acta 2016. [DOI: 10.1002/hlca.201500231] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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11
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Gilks SE, Davey RJ. Crystallisation from a Water-in-Oil Emulsion as a Route to Enantiomer Separation: The Case of dl
-Threonine. Chemistry 2015; 22:74-8. [DOI: 10.1002/chem.201503061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Indexed: 11/09/2022]
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Lo Nostro P, Ninham BW, Carretti E, Dei L, Baglioni P. Specific anion effects in Artemia salina. CHEMOSPHERE 2015; 135:335-340. [PMID: 25978674 DOI: 10.1016/j.chemosphere.2015.04.080] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 04/22/2015] [Accepted: 04/23/2015] [Indexed: 06/04/2023]
Abstract
The specific anion effect on the vitality of Artemia salina was investigated by measuring the Lethal Time LT50 of the crustaceans in the presence of different sodium salts solutions at room temperature and at the same ionic strength as natural seawater. Fluoride, thiocyanate and perchlorate are the most toxic agents, while chloride, bromide and sulfate are well tolerated. The rates of oxygen consumption of brine shrimps were recorded in mixed NaCl+NaF or NaCl+NaSCN solutions as a function of time. The results are discussed in terms of the Hofmeister series, and suggest that, besides the biochemical processes that involve F(-), SCN(-) and ClO4(-), the different physico-chemical properties of the strong kosmotropic and chaotropic anions may contribute in determining their strong toxicity for A. salina.
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Affiliation(s)
- Pierandrea Lo Nostro
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, 50019 Sesto Fiorentino, Firenze, Italy; Enzo Ferroni Foundation, 50019 Sesto Fiorentino, Firenze, Italy.
| | - Barry W Ninham
- Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Institute of Advanced Studies, Australian National University, Canberra 0200, Australia
| | - Emiliano Carretti
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, 50019 Sesto Fiorentino, Firenze, Italy
| | - Luigi Dei
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, 50019 Sesto Fiorentino, Firenze, Italy
| | - Piero Baglioni
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, 50019 Sesto Fiorentino, Firenze, Italy
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Responses of proteins to different ionic environment are linearly interrelated. J Chromatogr A 2015; 1387:32-41. [DOI: 10.1016/j.chroma.2015.02.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 01/30/2015] [Accepted: 02/03/2015] [Indexed: 01/03/2023]
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14
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Capability of PHSC equation of state for thermodynamic modeling of aqueous amino acid and peptide solutions. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2014.08.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Ferreira LA, Chervenak A, Placko S, Kestranek A, Madeira PP, Zaslavsky BY. Responses of polar organic compounds to different ionic environments in aqueous media are interrelated. Phys Chem Chem Phys 2014; 16:23347-54. [DOI: 10.1039/c4cp02084g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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16
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Salis A, Ninham BW. Models and mechanisms of Hofmeister effects in electrolyte solutions, and colloid and protein systems revisited. Chem Soc Rev 2014; 43:7358-77. [PMID: 25099516 DOI: 10.1039/c4cs00144c] [Citation(s) in RCA: 382] [Impact Index Per Article: 38.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Specific effects of electrolytes have posed a challenge since the 1880's. The pioneering work was that of Franz Hofmeister who studied specific salt induced protein precipitation. These effects are the rule rather the exception and are ubiquitous in chemistry and biology. Conventional electrostatic theories (Debye-Hückel, DLVO, etc.) cannot explain such effects. Over the past decades it has been recognised that additional quantum mechanical dispersion forces with associated hydration effects acting on ions are missing from theory. In parallel Collins has proposed a phenomenological set of rules (the law of matching water affinities, LMWA) which explain and bring to order the order of ion-ion and ion-surface site interactions at a qualitative level. The two approaches appear to conflict. Although the need for inclusion of quantum dispersion forces in one form or another is not questioned, the modelling has often been misleading and inappropriate. It does not properly describe the chemical nature (kosmotropic/chaotropic or hard/soft) of the interacting species. The success of the LMWA rules lies in the fact that they do. Here we point to the way that the two apparently opposing approaches might be reconciled. Notwithstanding, there are more challenges, which deal with the effect of dissolved gas and its connection to 'hydrophobic' interactions, the problem of water at different temperatures and 'water structure' in the presence of solutes. They take us to another dimension that requires the rebuilding of theoretical foundations.
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Affiliation(s)
- Andrea Salis
- Department of Chemical and Geological Science, University of Cagliari, Italy and CSGI.
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Zhang R, Zhuang W. Cation effect in the ionic solution optical Kerr effect measurements: A simulation study. J Chem Phys 2014; 140:054507. [PMID: 24511952 DOI: 10.1063/1.4863696] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Ruiting Zhang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, People's Republic of China
| | - Wei Zhuang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, People's Republic of China
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Sánchez M, Alkorta I, Elguero J, Ferraro MB, Sauer SP. On the transferability of atomic contributions to the optical rotatory power of hydrogen peroxide, methyl hydroperoxide and dimethyl peroxide. Mol Phys 2014. [DOI: 10.1080/00268976.2013.851420] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
| | - Ibon Alkorta
- Instituto de Química Médica (IQM-CSIC), Madrid, Spain
| | - José Elguero
- Instituto de Química Médica (IQM-CSIC), Madrid, Spain
| | - Marta B. Ferraro
- Departamento de Física and IFIBA, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, and CONICET, Argentina
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Lopez F, Cuomo F, Nostro PL, Ceglie A. Effects of solvent and alkaline earth metals on the heat-induced precipitation process of sodium caseinate. Food Chem 2013; 136:266-72. [DOI: 10.1016/j.foodchem.2012.07.117] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Revised: 07/27/2012] [Accepted: 07/30/2012] [Indexed: 10/28/2022]
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Medda L, Barse B, Cugia F, Boström M, Parsons DF, Ninham BW, Monduzzi M, Salis A. Hofmeister challenges: ion binding and charge of the BSA protein as explicit examples. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:16355-63. [PMID: 23126573 DOI: 10.1021/la3035984] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Experiments on bovine serum albumin (BSA) via potentiometric titration (PT) and electrophoretic light scattering (ELS) are used to study specific-ion binding. The effect is appreciable at a physiological concentration of 0.1 M. We found that anions bind to the protein surface at an acidic pH, where the protein carries a positive charge (Z(p) > 0), according to a Hofmeister series (Cl(-) < Br(-) < NO(3)(-) < I(-) < SCN(-)), as well as at the isoionic point (Z(p) = 0). The results obtained require critical interpretation. The measurements performed depend on electrostatic theories that ignore the very specific effects they are supposed to reveal. Notwithstanding this difficulty, we can still infer that different 1:1 sodium salts affect the BSA surface charge/pH curve because anions bind to the BSA surface with an efficiency which follows a Hofmeister series.
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Affiliation(s)
- Luca Medda
- Department of Chemical and Geological Sciences, University of Cagliari-CSGI and CNBS, Cittadella Universitaria, S.S. 554 bivio Sestu, 09042 Monserrato (CA), Italy
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Lo Nostro P, Ninham BW. Hofmeister phenomena: an update on ion specificity in biology. Chem Rev 2012; 112:2286-322. [PMID: 22251403 DOI: 10.1021/cr200271j] [Citation(s) in RCA: 675] [Impact Index Per Article: 56.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Pierandrea Lo Nostro
- Department of Chemistry and CSGI, University of Florence, 50019 Sesto Fiorentino (Firenze), Italy.
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22
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Lee BS, Kim KC. Study on the activity coefficients and solubilities of amino acids in aqueous solutions with perturbed-chain statistical associating fluid theory. KOREAN J CHEM ENG 2010. [DOI: 10.1007/s11814-009-0351-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Kundrat MD, Autschbach J. Modeling of the Chiroptical Response of Chiral Amino Acids in Solution Using Explicit Solvation and Molecular Dynamics. J Chem Theory Comput 2009; 5:1051-60. [DOI: 10.1021/ct8005216] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matthew D. Kundrat
- Department of Chemistry, 312 Natural Sciences Complex, The State University of New York at Buffalo, Buffalo, New York 14260-3000
| | - Jochen Autschbach
- Department of Chemistry, 312 Natural Sciences Complex, The State University of New York at Buffalo, Buffalo, New York 14260-3000
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Benoit D, Coulbeck E, Eames J, Motevalli M. On the structure and chiroptical properties of (S)-4-isopropyl-oxazolidin-2-one. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.03.032] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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