1
|
Dušeková E, Garajová K, Yavaşer R, Tomková M, Sedláková D, Dzurillová V, Kulik N, Fadaei F, Shaposhnikova A, Minofar B, Sedlák E. Modulation of global stability, ligand binding and catalytic properties of trypsin by anions. Biophys Chem 2022; 288:106856. [PMID: 35872468 DOI: 10.1016/j.bpc.2022.106856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 07/02/2022] [Accepted: 07/13/2022] [Indexed: 12/01/2022]
Abstract
Specific salts effect is well-known on stability and solubility of proteins, however, relatively limited knowledge is known regarding the effect on catalytic properties of enzymes. Here, we examined the effect of four sodium anions on thermal stability and catalytic properties of trypsin and binding of the fluorescent probe, p-aminobenzamidine (PAB), to the enzyme. We show that the specific anions effect on trypsin properties agrees with the localization of the anions in the Hofmeister series. Thermal stability of trypsin, Tm, the affinity of the fluorescent probe to the binding site, Kd, and the rate constant, kcat, of trypsin-catalyzed hydrolysis of the substrate N-benzoyl-L-arginine ethyl ester (BAEE) increase with increasing kosmotropic character of anions in the order: perchlorate<bromide<chloride<sulfate, while the value of Michaelis constant, KM, decreases. Correlations between the values of Tm, Kd for PAB, kcat, and KM for BAEE in the presence of 1 M studied salts suggest interrelation among these parameters of the enzyme. Global stabilization as well as increased rigidity of trypsin is accompanied by strengthening of interaction with fluorescent probe PAB and in accordance with decreasing values of KM for the substrate BAEE. Strong correlations between parameters characterizing the trypsin properties with the charge densities of anions clearly indicate direct electrostatic interaction as a basis of the specific anion effect on the conformational and functional properties of the enzyme.
Collapse
Affiliation(s)
- Eva Dušeková
- Department of Biophysics, Faculty of Science, P. J. Šafárik University in Košice, Jesenná 5, 04154 Košice, Slovakia
| | - Katarína Garajová
- Department of Biochemistry, Faculty of Science, P. J. Šafárik University in Košice, Moyzesova 11, 04154 Košice, Slovakia
| | - Rukiye Yavaşer
- Department of Biochemistry, Faculty of Science, P. J. Šafárik University in Košice, Moyzesova 11, 04154 Košice, Slovakia; Chemistry Department, Faculty of Arts and Science, Aydın Adnan Menderes University, 09010 Aydın, Turkey
| | - Mária Tomková
- Center for Interdisciplinary Biosciences, P. J. Šafárik University in Košice, Jesenná 5, 04154 Košice, Slovakia
| | - Dagmar Sedláková
- Department of Biophysics, Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia
| | - Veronika Dzurillová
- Department of Biophysics, Faculty of Science, P. J. Šafárik University in Košice, Jesenná 5, 04154 Košice, Slovakia
| | - Natalia Kulik
- Faculty of Science, University of South Bohemia in České Budějovice, Branišovská 1645/31A, 37005 České Budějovice, Czech Republic
| | - Fatemeh Fadaei
- Faculty of Science, University of South Bohemia in České Budějovice, Branišovská 1645/31A, 37005 České Budějovice, Czech Republic; Laboratory of Structural Biology and Bioinformatics, Institute of Microbiology of the Czech Academy of Sciences, Zámek 136, 37333 Nové Hrady, Czech Republic
| | - Anastasiia Shaposhnikova
- Faculty of Science, University of South Bohemia in České Budějovice, Branišovská 1645/31A, 37005 České Budějovice, Czech Republic; Laboratory of Structural Biology and Bioinformatics, Institute of Microbiology of the Czech Academy of Sciences, Zámek 136, 37333 Nové Hrady, Czech Republic
| | - Babak Minofar
- Laboratory of Structural Biology and Bioinformatics, Institute of Microbiology of the Czech Academy of Sciences, Zámek 136, 37333 Nové Hrady, Czech Republic.
| | - Erik Sedlák
- Center for Interdisciplinary Biosciences, P. J. Šafárik University in Košice, Jesenná 5, 04154 Košice, Slovakia.
| |
Collapse
|
2
|
Wielgus-Kutrowska B, Marcisz U, Antosiewicz JM. Searching for Hydrodynamic Orienting Effects in the Association of Tri- N-acetylglucosamine with Hen Egg-White Lysozyme. J Phys Chem B 2021; 125:10701-10709. [PMID: 34546051 PMCID: PMC8488934 DOI: 10.1021/acs.jpcb.1c06762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
Using stopped-flow
fluorometry, we determined rate constants for
the formation of diffusional encounter complexes of tri-N-acetylglucosamine (NAG3) with hen egg-white lysozyme
(kaWT) and its double mutant Asp48Asn/Lys116Gln (kaMT). We defined
binding anisotropy, κ ≡ (kaWT – kaMT)/(kaWT + kaMT), and determined its ionic strength dependence.
Our goal was to check if this ionic strength dependence provides information
about the orienting hydrodynamic effects in the ligand-binding process.
We also computed ionic strength dependence of the binding anisotropy
from Brownian dynamics simulations using simple models of the lysozyme–NAG3 system. The results of our experiments indicate that in the
case of lysozyme and NAG3 such hydrodynamic orienting effects
are rather negligible. On the other hand, the results of our Brownian
dynamics simulations prove that there exist molecular systems for
which such orienting effects are substantial. However, the ionic strength
dependence of the rate constants for the wild-type and modified systems
do not exhibit any qualitative features that would allow us to conclude
the presence of hydrodynamic orienting effects from stopped-flow experiments
alone. Nevertheless, the results of our simulations suggest the presence
of hydrodynamic orienting effects in the receptor–ligand association
when the anisotropy of binding depends on the solvent viscosity.
Collapse
Affiliation(s)
- Beata Wielgus-Kutrowska
- Biophysics Division, Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5 St., 02-093 Warsaw, Poland
| | - Urszula Marcisz
- Biophysics Division, Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5 St., 02-093 Warsaw, Poland
| | - Jan M Antosiewicz
- Biophysics Division, Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5 St., 02-093 Warsaw, Poland
| |
Collapse
|
3
|
SUGIMOTO Y, FUJIEDA N, KANO K. Electrochemical Consideration of Electrostatic Interaction of Charged Molecules with Partially Overlapped Electric Field: Zwitterions and Proteins. ELECTROCHEMISTRY 2021. [DOI: 10.5796/electrochemistry.21-00030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Yu SUGIMOTO
- Collaborative Research Organization for Micro and Nano Multifunctional Devices NMfD, The University of Tokyo
| | - Nobutaka FUJIEDA
- Department of Applied Life Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University
| | - Kenji KANO
- Center for Advanced Science and Innovation, Kyoto University
| |
Collapse
|