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Hossain MAA, Islam T, Joy MTR, Kowser Z, Ahmed MZ, Rehman MT, AlAjmi MF, Mahbub S, Goni MA, Hoque MA, Kabir SE. Interaction between gastric enzyme pepsin and tetradecyltrimethylammonium bromide in presence of sodium electrolytes: Exploration of micellization behavior. Int J Biol Macromol 2023; 253:127478. [PMID: 37866567 DOI: 10.1016/j.ijbiomac.2023.127478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 10/13/2023] [Accepted: 10/15/2023] [Indexed: 10/24/2023]
Abstract
Pepsin is a proteolytic enzyme used in the treatment of digestive disorders. In this study, we investigated the physicochemical properties of the tetradecyltrimethylammonium bromide (TTAB) and pepsin protein mixture in various sodium salt media within a temperature range of 300.55-320.55 K with 5 K intervals. The conductometric study of the TTAB+pepsin mixture revealed a reduction in the critical micelle concentration (CMC) in electrolyte media. The micellization of TTAB was delayed in the presence of pepsin. The CMC of the TTAB + pepsin mixture was found to depend on the concentrations of electrolytes and protein, as well as the temperature variations. The aggregation of the TTAB+pepsin mixture was hindered as a function of [pepsin] and increasing temperatures, while micellization was promoted in aqueous electrolyte solutions. The negative free energy changes (∆Gm0) indicated the spontaneous aggregation of the TTAB+pepsin mixture. Changes in enthalpy, entropy, molar heat capacities, transfer properties, and enthalpy-entropy compensation variables were calculated and illustrated rationally. The interaction forces between TTAB and pepsin protein in the experimental solvents were primarily hydrophobic and electrostatic (ion-dipole) in nature. An analysis of molecular docking revealed hydrophobic interactions as the main stabilizing forces in the TTAB-pepsin complex.
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Affiliation(s)
- Md Al Amin Hossain
- Department of Chemistry, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Tamanna Islam
- Department of Chemistry, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Md Tuhinur R Joy
- Department of Chemistry, Jashore University of Science and Technology, Jashore 7408, Bangladesh.
| | - Zannatul Kowser
- Department of Chemistry, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Mohammad Z Ahmed
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Md Tabish Rehman
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Mohamed F AlAjmi
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Shamim Mahbub
- Nuclear Safety, Security & Safeguards Division, Bangladesh Atomic Energy Regulatory Authority, Agargaon, Dhaka 1207, Bangladesh
| | - Md Abdul Goni
- Department of Biological and Physical Sciences, South Carolina State University, Orangeburg, SC 29117, USA
| | - Md Anamul Hoque
- Department of Chemistry, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh
| | - Shariff E Kabir
- Department of Chemistry, Jagannath University, Dhaka 1100, Bangladesh
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Bhuiyan HA, Anis-Ul-Haque KM, Joy MTR, Rana S, Khan JM, Kumar D, Rehman MT, Goni MA, Hoque MA, Kabir SE. Aggregation phenomena and physico-chemical properties of tetradecyltrimethylammonium bromide and protein (bovine serum albumin) mixture: Influence of electrolytes and temperature. Int J Biol Macromol 2023; 253:127101. [PMID: 37769770 DOI: 10.1016/j.ijbiomac.2023.127101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 09/23/2023] [Accepted: 09/25/2023] [Indexed: 10/03/2023]
Abstract
It is important for biological, pharmaceutical, and cosmetic industries to understand how proteins and surfactants interact. Herein, the interaction of bovine serum albumin (BSA) with tetradecyltrimethylammonium bromide (TTAB) in different inorganic salts (KCl, K2SO4, K3PO4.H2O) has been explored through the conductivity measurement method at different temperatures (300.55 to 325.55 K) with a specific salt concentration and at a fixed temperature (310.55 K) using different salts concentrations. The extent of micelle ionization (α) and different thermodynamic parameters associated with BSA and TTAB mixtures in salt solutions were calculated. Evaluation of the magnitudes of ∆Hm0 and ∆Sm0 showed that the association was exothermic and primarily an enthalpy-operated process in all cases at lower contents of BSA, but the system became endothermic, and entropy driven in the presence of K3PO4.H2O at a relatively higher concentration of BSA. The enthalpy-entropy compensation variables were determined, which explained the types and nature of interactions between TTAB and BSA in salt media. Molecular docking analysis revealed that the main stabilizing factors in the BSA-TTAB complex are electrostatic and hydrophobic interactions. These findings aligned with the significant results obtained from the conductometry method regarding the nature and characteristics of binding forces observed between BSA and TTAB.
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Affiliation(s)
| | - K M Anis-Ul-Haque
- Department of Chemistry, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Md Tuhinur R Joy
- Department of Chemistry, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Shahed Rana
- Department of Chemistry, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh
| | - Javed Masood Khan
- Department of Food Science and Nutrition, College of Food and Agricultural Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Dileep Kumar
- Laboratory for Chemical Computation and Modeling, Institute for Computational Science and Artificial Intelligence, Van Lang University, Ho Chi Minh City, Viet Nam; Faculty of Applied Technology, School of Technology, Van Lang University, Ho Chi Minh City, Viet Nam.
| | - Md Tabish Rehman
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Md Abdul Goni
- Department of Biological and Physical Sciences, South Carolina State University, Orangeburg, SC 29117, USA
| | - Md Anamul Hoque
- Department of Chemistry, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh
| | - Shariff E Kabir
- Department of Chemistry, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh; Department of Chemistry, Jagannath University, Dhaka 1100, Bangladesh
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Al Amin Hossain M, Islam T, Khan JM, Joy MTR, Mahbub S, Khan SA, Ahmad A, Rahman MM, Anamul Hoque M, Kabir SE. Physicochemical parameters and modes of interaction associated with the micelle formation of a mixture of tetradecyltrimethylammonium bromide and cefixime trihydrate: effects of hydrotropes and temperature. RSC Adv 2023; 13:30429-30442. [PMID: 37854490 PMCID: PMC10580262 DOI: 10.1039/d3ra04748b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Accepted: 10/06/2023] [Indexed: 10/20/2023] Open
Abstract
The interaction between an antibiotic drug (cefixime trihydrate (CMT)) and a cationic surfactant (tetradecyltrimethylammonium bromide (TTAB)) was examined in the presence of both ionic and non-ionic hydrotropes (HTs) over the temperature range of 300.55 to 320.55 K. The values of the critical micelle concentration (CMC) of the TTAB + CMT mixture were experienced to have dwindled with an enhancement of the concentrations of resorcinol (ReSC), sodium benzoate (NaBz), sodium salicylate (NaS), while for the same system, a monotonically augmentation of CMC was observed in aq. 4-aminobenzoic acid (PABA) solution. A gradual increase in CMC, as a function of temperature, was also observed. The values of the degree of counterion binding (β) for the TTAB + CMT mixture were experienced to be influenced by the concentrations of ReSC/NaBz/NaS/PABA and a change in temperature. The micellization process of TTAB + CMT was observed to be spontaneous (negative standard Gibbs free energy change (ΔG0m)) at all conditions studied. Also, the values of standard enthalpy change (ΔH0m) and entropy change (ΔS0m) were found negative and positive, respectively (with a few exceptions), for the test cases indicating an exothermic and enthalpy-entropy directed micellization process. The recommended interaction forces between the components in the micellar system are electrostatic and hydrophobic interactions. In this study, the values of ΔC0m were negative in aqueous NaBz, ReSC, and PABA media, and positive in case of NaS. An excellent compensation scenario between the enthalpy and entropy for the CMT + TTAB mixed system in the investigated HTs solutions is well defined in the current work.
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Affiliation(s)
- Md Al Amin Hossain
- Department of Chemistry, Jashore University of Science and Technology Jashore 7408 Bangladesh
| | - Tamanna Islam
- Department of Chemistry, Jashore University of Science and Technology Jashore 7408 Bangladesh
| | - Javed Masood Khan
- Department of Food Science and Nutrition, College of Food and Agricultural Sciences, King Saud University Riyadh 11451 Saudi Arabia
| | - Md Tuhinur R Joy
- Department of Chemistry, Jashore University of Science and Technology Jashore 7408 Bangladesh
| | - Shamim Mahbub
- Nuclear Safety, Security & Safeguards Division, Bangladesh Atomic Energy Regulatory Authority Agargaon Dhaka 1207 Bangladesh
| | - Salman A Khan
- Physical Sciences Section (Chemistry), School of Sciences, Maulana Azad National Urdu University Hyderabad 500032 Telangana India
| | - Anis Ahmad
- Sylvester Comprehensive Cancer Center, University of Miami, Miller School of Medicine Miami FL USA
| | | | - Md Anamul Hoque
- Department of Chemistry, Jahangirnagar University Savar Dhaka 1342 Bangladesh
| | - Shariff E Kabir
- Department of Chemistry, Jagannath University Dhaka 1100 Bangladesh
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Joy MTR, Bhoumik NC, Ghosh S, Richmond MG, Kabir SE. A new synthetic route for the preparation of [Os 3(CO) 10(μ-OH)(μ-H)] and its reaction with bis(diphenylphosphino)methane (dppm): syntheses and X-ray structures of two isomers of [Os 3(CO) 8(μ-OH)(μ-H)(μ-dppm)] and [Os 3(CO) 7(μ 3-CO)(μ 3-O)(μ-dppm)]. RSC Adv 2020; 10:44699-44711. [PMID: 35516232 PMCID: PMC9058515 DOI: 10.1039/d0ra08783a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 11/25/2020] [Indexed: 11/21/2022] Open
Abstract
The triosmium cluster [Os3(CO)10(μ-OH)(μ-H)] containing bridging hydride and hydroxyl groups at a common Os–Os edge was obtained in good yield (ca. 75%) from the hydrolysis of the labile triosmium cluster [Os3(CO)10(NCMe)2] in THF at 67 °C. [Os3(CO)10(μ-OH)(μ-H)] reacts with dppm at 68 °C to afford the isomeric clusters 1 and 2 with the general formula [Os3(CO)8(μ-OH)(μ-H)(μ-dppm)] that differ by the disposition of bridging dppm ligand. Cluster 1 is produced exclusively from the reaction of [Os3(CO)10(μ-OH)(μ-H)] with dppm in CH2Cl2 at room temperature in the presence of added Me3NO. Heating cluster 1 at 81 °C furnishes 2 in a process that likely proceeds by the release of one arm of the dppm ligand, followed by ligand reorganization about the cluster polyhedron and ring closure of the pendent dppm ligand. The oxo-capped [Os3(CO)7(μ3-CO)(μ3-O)(μ-dppm)] (3) has been isolated starting from the thermolysis of either 1 or 2 at 139 °C. Reactions of [Os3(CO)10(μ-dppm)] with ROH (R = Me, Et) in the presence of Me3NO at 80 °C furnish [Os3(CO)8(μ-OH)(μ,η1,κ1-OCOR)(μ-dppm)] (4, R = Me; 5, R = Et). Clusters 1–5 have been characterized by a combination of analytical and spectroscopic studies, and the molecular structure of each product has been established by X-ray crystallography. The bonding in these products has been examined by electronic structure calculations, and cluster 1 is confirmed as the kinetic product of substitution, while cluster 2 represents the thermodynamically favored isomer. The cluster [Os3(CO)10(μ-OH)(μ-H)] was obtained in 75% from the hydrolysis of [Os3(CO)10(NCMe)2].![]()
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Affiliation(s)
- Md Tuhinur R Joy
- Department of Chemistry, Jahangirnagar University Savar Dhaka 1342 Bangladesh
| | - Nikhil C Bhoumik
- Department of Chemistry, Jahangirnagar University Savar Dhaka 1342 Bangladesh
| | - Shishir Ghosh
- Department of Chemistry, Jahangirnagar University Savar Dhaka 1342 Bangladesh
| | - Michael G Richmond
- Department of Chemistry, University of North Texas 1155 Union Circle, Box 305070 Denton TX 76203 USA
| | - Shariff E Kabir
- Department of Chemistry, Jahangirnagar University Savar Dhaka 1342 Bangladesh
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Bhoumik NC, Joy MTR, Ghosh S, Richmond MG, Kabir SE. Thermolysis of [HOs3(CO)8{µ3-Ph2PCH2P(Ph)C6H4}]: New Os2- and Os3- cluster products based on multiple C H bond activation of the bis(diphenylphosphino)methane ligand. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119733] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Joy MTR, Roknuzzaman, Hossain ME, Ghosh S, Tocher DA, Richmond MG, Kabir SE. Reactions of triosmium and triruthenium clusters with 2-ethynylpyridine: new modes for alkyne C-C bond coupling and C-H bond activation. RSC Adv 2020; 10:30671-30682. [PMID: 35516016 PMCID: PMC9056324 DOI: 10.1039/d0ra05393g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 07/29/2020] [Indexed: 11/21/2022] Open
Abstract
The reaction of the trimetallic clusters [H2Os3(CO)10] and [Ru3(CO)10L2] (L = CO, MeCN) with 2-ethynylpyridine has been investigated. Treatment of [H2Os3(CO)10] with excess 2-ethynylpyridine affords [HOs3(CO)10(μ-C5H4NCH=CH)] (1), [HOs3(CO)9(μ3-C5H4NC
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CH2)] (2), [HOs3(CO)9(μ3-C5H4NCCCO2)] (3), and [HOs3(CO)10(μ-CHCHC5H4N)] (4) formed through either the direct addition of the Os–H bond across the C
Created by potrace 1.16, written by Peter Selinger 2001-2019
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C bond or acetylenic C–H bond activation of the 2-ethynylpyridine substrate. In contrast, the dominant pathway for the reaction between [Ru3(CO)12] and 2-ethynylpyridine is C–C bond coupling of the alkyne moiety to furnish the triruthenium clusters [Ru3(CO)7(μ-CO){μ3-C5H4NCCHC(C5H4N)CH}] (5) and [Ru3(CO)7(μ-CO){μ3-C5H4NCCHC(C5H4N)CHCHC(C5H4N)}] (6). Cluster 5 contains a metalated 2-pyridyl-substituted diene while 6 exhibits a metalated 2-pyridyl-substituted triene moiety. The functionalized pyridyl ligands in 5 and 6 derive via the formal C–C bond coupling of two and three 2-ethynylpyridine molecules, respectively, and 5 and 6 provide evidence for facile alkyne insertion at ruthenium clusters. The solid-state structures of 1–3, 5, and 6 have been determined by single-crystal X-ray diffraction analyses, and the bonding in the product clusters has been investigated by DFT. In the case of 1, the computational results reveal a rare thermodynamic preference for a terminal hydride ligand as opposed to a hydride-bridged Os–Os bond (3c,2e Os–Os–H bond). The reactivity of 2-ethynylpyridine at low-valent triosmium and triruthenium centers has been investigated.![]()
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Affiliation(s)
- Md Tuhinur R Joy
- Department of Chemistry, Jahangirnagar University Savar Dhaka 1342 Bangladesh
| | - Roknuzzaman
- Department of Chemistry, Jahangirnagar University Savar Dhaka 1342 Bangladesh
| | - Md Emdad Hossain
- Department of Chemistry, Jahangirnagar University Savar Dhaka 1342 Bangladesh
| | - Shishir Ghosh
- Department of Chemistry, Jahangirnagar University Savar Dhaka 1342 Bangladesh
| | - Derek A Tocher
- Department of Chemistry, University College London 20 Gordon Street London WC1H 0AJ UK
| | - Michael G Richmond
- Department of Chemistry, University of North Texas 1155 Union Circle, Box 305070 Denton TX 76203 USA
| | - Shariff E Kabir
- Department of Chemistry, Jahangirnagar University Savar Dhaka 1342 Bangladesh
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Roy PS, Joy MTR, Ghosh S, Tocher DA, Nesterov VN, Richmond MG, Kabir SE. Reactions of [Os3(CO)10(μ-dppm)] and [HOs3(CO)8{μ3-Ph2PCH2P(Ph)C6H4}] with Bu3GeH: Ge–H and Ge–C bond cleavage at triosmium centers. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.07.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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