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Thorve M, Kishore N. Binding and displacement study of gentamicin, 5-fluorouracil, oxytetracycline and rolitetracycline with (BSA: Drug2) complex using spectroscopic and calorimetric techniques: Biophysical approach. Int J Biol Macromol 2024; 276:133677. [PMID: 38986981 DOI: 10.1016/j.ijbiomac.2024.133677] [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: 01/02/2024] [Revised: 04/02/2024] [Accepted: 07/03/2024] [Indexed: 07/12/2024]
Abstract
Understanding of energetics of interactions between drug and protein is essential in pharmacokinetics and pharmacodynamics study. The binding affinity (K) helps in investigating how tightly or loosely drug is bound to protein. The binding, displacement, conformational change and stability study of drugs- gentamicin (GM), 5-fluorouracil (5FU), oxytetracycline (OTC) and rolitetracycline (RTC) with bovine serum albumin (BSA) has been carried out in presence of each other drug by fluorescence, UV-visible spectroscopy, molecular docking, circular dichroism techniques and thermal denaturation method. The site marker study and docking methods have confirmed that 5FU and GM are able to bind at site 1 and OTC and RTC at site II of BSA. The order of their binding affinities with BSA for the binary system were as GM <5FU < OTC < RTC with the order of 102 < 103 < 105 < 105-6 M-1. The displacement study has shown that higher affinity drug decreases the equilibrium constant of another drug already in bound state with BSA if both these drugs are having the same binding site. Therefore 5FU, GM (binding site 1) drugs were not able to displace OTC and RTC (binding site 2) and vice-versa as they are binding at two different sites. The binding constant values were found to be decreasing with increasing temperature for all the systems involved which suggests static or mixed type of quenching, however can only confirmed with the help of TCSPC technique. The ΔG0 (binding energy) obtained from docking method were in accordance with the ITC method. From molecular docking we have determined the amino acid residues involved in binding process for binary and ternary systems by considering first rank minimum binding energy confirmation. From CD it has been observed that RTC causes most conformational change in secondary and tertiary structure of BSA due to the presence of pyrrole ring. OTC-RTC with higher affinity showed highest melting temperature Tm values while low affinity drugs in (5FU-GM) combination showed lowest Tm value. 5FU showed large endothermic denaturation enthalpy ΔHd0 due to the presence of highly electronegative fluorine atom in the pyridine analogue.
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Affiliation(s)
- Madhuri Thorve
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Nand Kishore
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
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Liu L, Zhou Y, Liu Y, Wan J, Zhu Q, Bi S, Zhou M, Wang Y, Li X, Liu Y, Lan L. Structural and functional changes on polyhydroxy alcohol-mediated curing pork myofibrillar protein: Experimental and molecular simulation investigations. Food Res Int 2023; 170:113012. [PMID: 37316079 DOI: 10.1016/j.foodres.2023.113012] [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: 03/05/2023] [Revised: 04/17/2023] [Accepted: 05/19/2023] [Indexed: 06/16/2023]
Abstract
This study aimed to investigate the structural and functional changes in polyhydroxy alcohol-mediated curing on pork myofibrillar proteins (MP). The results obtained from total sulfhydryl groups, surface hydrophobicity, fluorescence and Raman spectroscopies, and solubility demonstrated that the polyhydroxy alcohols (especially xylitol) significantly modified the MP tertiary structure, making this structure more hydrophobic and tighter. However, no significant differences were detected in the secondary structure. Furthermore, the thermodynamic analysis revealed that polyhydroxy alcohols could develop an amphiphilic interfacial layer on the MP surface, significantly increasing the denaturation temperature and enthalpy of denaturation (P < 0.05). On the other hand, the molecular docking and dynamics simulations showed that polyhydroxy alcohols interact with actin mainly through hydrogen bonds and van der Waals forces. Therefore, this could help reduce the effect of high-content salt ions on MP denaturation and improve the cured meat quality.
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Affiliation(s)
- Linggao Liu
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China; Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang 550025, China
| | - Ying Zhou
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China; Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang 550025, China
| | - Yuanyuan Liu
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China; Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang 550025, China
| | - Jing Wan
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China; Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang 550025, China; Key Laboratory Mountain Plateau Animals Genetics and Breeding, Ministry of Education, Guiyang 550025, China
| | - Qiujin Zhu
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China; Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang 550025, China; Key Laboratory Mountain Plateau Animals Genetics and Breeding, Ministry of Education, Guiyang 550025, China.
| | - Shenghui Bi
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China; Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang 550025, China
| | - Mixin Zhou
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China; Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang 550025, China
| | - Yang Wang
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China; Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang 550025, China
| | - Xiangrui Li
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China; Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang 550025, China
| | - Yehua Liu
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China; Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang 550025, China
| | - Lisha Lan
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China; Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang 550025, China
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Zhou Y, Zhou Y, Wan J, Zhu Q, Liu L, Gu S, Li H. Effects of sorbitol-mediated curing on the physicochemical properties and bacterial community composition of loin ham during fermentation and ripening stages. Food Chem X 2022; 17:100543. [PMID: 36845517 PMCID: PMC9943751 DOI: 10.1016/j.fochx.2022.100543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 12/08/2022] [Accepted: 12/10/2022] [Indexed: 12/14/2022] Open
Abstract
In this study, the impacts of loin ham with sorbitol-mediated curing on its physicochemical properties and bacterial community composition during fermentation and ripening were investigated. The salt content, pH, and water activity (aw) were lower in the sorbitol group than in the control group throughout the fermentation and ripening stages (P < 0.05). In addition, the L* values were higher in the sorbitol group (P < 0.05). Additionally, microbial diversity diminished in all groups as the fermentation and ripening process proceeded, with Lactobacillus turning into the dominant genus in the control group and Staphylococcus and Lactobacillus becoming dominant in the sorbitol group. Pearson's correlation analysis confirmed that the physicochemical properties have been significantly correlated with the bacterial community. In conclusion, sorbitol-mediated curing not only facilitates salt reduction while prolonging the storage period of loin ham, but also improves the distribution of bacterial community in loin ham and enhances its quality.
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Affiliation(s)
- Yeling Zhou
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China,Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang 550025, China
| | - Ying Zhou
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China,Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang 550025, China
| | - Jing Wan
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China,Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang 550025, China,Key Laboratory Mountain Plateau Animals Genetics and Breeding, Ministry of Education, Guiyang 550025, China
| | - Qiujin Zhu
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China,Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang 550025, China,Key Laboratory Mountain Plateau Animals Genetics and Breeding, Ministry of Education, Guiyang 550025, China,Corresponding author at: Department of Liquor and Food Engineering, Guizhou University, Huaxi District, Guiyang 550025, Guizhou Province, China.
| | - Linggao Liu
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China,Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang 550025, China
| | - Sha Gu
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China,Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang 550025, China
| | - Hongying Li
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China,Key Laboratory of Agricultural and Animal Products Store and Processing of Guizhou Province, Guiyang 550025, China,Key Laboratory Mountain Plateau Animals Genetics and Breeding, Ministry of Education, Guiyang 550025, China
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Anjali, Kishore N. Influence of amino acids on alkaline pH induced partially folded molten globule like intermediate of bovine serum albumin: Conformational and thermodynamic insights. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Meena P, Kishore N. Synergistic effects of osmolytes on solvent exclusion and resulting protein stabilization: Studies with sucrose, taurine and sorbitol individually and in combination. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.121175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Jain A, Kishore N. Micellar properties of pluronics in combination with cationic surfactant and interaction with lysozyme: Thermodynamic evaluation. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Joshi A, Kishore N. Macromolecular crowding and preferential exclusion counteract the effect of protein denaturant: Biophysical aspects. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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