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Hoque MA, Ali MI, Rub MA, Rahman M, Rana S, Rahman MM, Kumar D, Azum N, Asiri AM, Khan MA. Physico-chemical properties of the association of cetyltrimethylammonium bromide and bovine serum albumin mixture in aqueous-organic mixed solvents. Int J Biol Macromol 2023; 228:445-452. [PMID: 36529211 DOI: 10.1016/j.ijbiomac.2022.12.099] [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: 11/01/2022] [Revised: 12/01/2022] [Accepted: 12/10/2022] [Indexed: 12/23/2022]
Abstract
Herein, we have investigated the association behavior of bovine serum albumin (BSA) and cetyltrimethylammonium bromide (CTAB) using the conductivity method in H2O and H2O + organic mixed solvents at different temperatures. The association phenomenon was detected from the deviation of the conductivity changes with enhancing the surfactant concentration and changes of numerous physico-chemical properties, such as CMC, α, β and thermodynamic variables (∆G0m, ∆H0m and ∆S0m). The values of CMC for the CTAB + BSA system in 10 % (v/v) solvents follow the trend: CMCwater < CMCwater+DMSO < CMCwater+AN < CMCwater+DX < CMCwater+DMF. The interaction of BSA with CTAB is notably influenced due to a change of temperature and extent of hydration of BSA and surfactant. The obtained values of -∆G0m manifest that the association of BSA and CTAB mixture is a spontaneous process, while the values of -∆G0m in presence of 10 % (v/v) aq. organic solvents come out in the given sequence: -∆Gmo (H2O + DMSO) > ∆Gmo (H2O + DMF) > -∆Gmo (H2O + DX) > -∆Gmo (H2O + AN). The H-bonding, ion-dipole, along with the hydrophobic interactions, are believed to be the binding interactions between BSA and CTAB in the study media.
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Affiliation(s)
- Md Anamul Hoque
- Department of Chemistry, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh
| | - Mohammad Idrish Ali
- Department of Chemistry, Mawlana Bhasani Science and Technology University, Santosh, Tangail 1902, Bangladesh
| | - Malik Abdul Rub
- Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Marzia Rahman
- Department of Chemistry, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh
| | - Shahed Rana
- Department of Chemistry, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh
| | - Mohammad Majibur Rahman
- Department of Environmental Sciences, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh
| | - 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, Van Lang University, Ho Chi Minh City, Viet Nam.
| | - Naved Azum
- Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Abdullah M Asiri
- Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah 21589, Saudi Arabia; Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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Ahanger IA, Parray ZA, Raina N, Bashir S, Ahmad F, Hassan MI, Shahid M, Sharma A, Islam A. Counteraction of the cetyltrimethylammonium bromide-induced protein aggregation by Heparin: Potential impact on protein aggregation and neurodegenerative diseases using biophysical approaches. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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Sanabria JC, Romero CM. Influence of tetraalkylammonium salts on the adsorption kinetics of bovine serum albumin in aqueous solutions at the air-liquid interface. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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4
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Song Y, Niu Y, Zheng H, Yao Y. Interaction of Bis-Guanidinium Acetates Surfactants with Bovine Serum Albumin Evaluated by Spectroscopy. TENSIDE SURFACT DET 2021. [DOI: 10.1515/tsd-2020-2283] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
The interactions between cocopropane bis-guanidinium acetates, tallowpropane bis-guanidinium acetates with bovine serum albumin (BSA) in an aqueous solution were studied by fluorescence and circular dichroic spectroscopy measurements. The aim of the study was to elucidate the influence of the hydrophilic group and the length of the hydrophobic chain of these surfactants on the mechanism of binding to BSA. The results revealed that for both surfactants, at low concentrations, the Stern–Volmer plots had an upward curvature and at high concentrations, the quenching efficiency was decreased with increase in surfactant concentration. Different thermodynamics parameters demonstrated the existence of hydrogen bond and van der Waals force which acting as binding forces. Static quenching was observed among the protein and surfactant. The conformation of BSA was changed at higher surfactant concentrations as shown by synchronous fluorescence and CD spectroscopy. This work reveals the mechanism and binding characteristics between guanidine surfactants and protein, and provided the basis for further applications of surfactants.
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Affiliation(s)
- Yongbo Song
- Department of Chemistry and Chemical Engineering Taiyuan Institute of Technology , 31# Xinlan Road Taiyuan Shanxi Province P. R. China
| | - Yulan Niu
- Department of Chemistry and Chemical Engineering Taiyuan Institute of Technology , 31# Xinlan Road Taiyuan Shanxi Province P. R. China
| | - Hongyan Zheng
- Department of Chemistry and Chemical Engineering Taiyuan Institute of Technology , 31# Xinlan Road Taiyuan Shanxi Province P. R. China
| | - Ying Yao
- Department of Chemistry and Chemical Engineering Taiyuan Institute of Technology , 31# Xinlan Road Taiyuan Shanxi Province P. R. China
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Ahanger IA, Bashir S, Parray ZA, Alajmi MF, Hussain A, Ahmad F, Hassan MI, Islam A, Sharma A. Rationalizing the Role of Monosodium Glutamate in the Protein Aggregation Through Biophysical Approaches: Potential Impact on Neurodegeneration. Front Neurosci 2021; 15:636454. [PMID: 33746704 PMCID: PMC7969894 DOI: 10.3389/fnins.2021.636454] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 01/29/2021] [Indexed: 11/13/2022] Open
Abstract
Monosodium glutamate (MSG) is the world’s most extensively used food additive and is generally recognized as safe according to the FDA. However, it is well reported that MSG is associated with a number of neurological diseases, and in turn, neurological diseases are associated with protein aggregation. This study rationalized the role of MSG in protein aggregation using different biophysical techniques such as absorption, far-UV CD, DLS, and ITC. Kinetic measurements revealed that MSG causes significant enhancement of aggregation of BSA through a nucleation-dependent polymerization mechanism. Also, CTAB-BSA aggregation is enhanced by MSG significantly. MSG-induced BSA aggregation also exhibits the formation of irreversible aggregates, temperature dependence, non-Arrhenius behavior, and enhancement of hydrodynamic diameter. From the isothermal titration calorimetry measurement, the significant endothermic heat of the interaction of BSA-MSG indicates that protein aggregation may be due to the coupling of MSG with the protein. The determined enthalpy change (ΔH) is largely positive, also suggesting an endothermic nature, whereas entropy change (ΔS) is positive and Gibbs free energy change (ΔG) is largely negative, suggesting the spontaneous nature of the interaction. Furthermore, even a low concentration of MSG is involved in the unfolding of the secondary structure of protein with the disappearance of original peaks and the formation of a unique peak in the far-UV CD, which is an attention-grabbing observation. This is the first investigation which links the dietary MSG with protein aggregation and thus will be very instrumental in understanding the mechanism of various MSG-related human physiological as well as neurological diseases.
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Affiliation(s)
- Ishfaq Ahmad Ahanger
- Department of Chemistry, Biochemistry and Forensic Science, Amity School of Applied Sciences, Amity University Haryana, Gurgaon, India.,Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India
| | - Sania Bashir
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India
| | - Zahoor Ahmad Parray
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India
| | - Mohamed F Alajmi
- Department of Pharmacognosy College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Afzal Hussain
- Department of Pharmacognosy College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Faizan Ahmad
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India
| | - Md Imtaiyaz Hassan
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India
| | - Asimul Islam
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India
| | - Anurag Sharma
- Department of Chemistry, Biochemistry and Forensic Science, Amity School of Applied Sciences, Amity University Haryana, Gurgaon, India
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Ahanger I, Parray ZA, Nasreen K, Ahmad F, Hassan MI, Islam A, Sharma A. Heparin Accelerates the Protein Aggregation via the Downhill Polymerization Mechanism: Multi-Spectroscopic Studies to Delineate the Implications on Proteinopathies. ACS OMEGA 2021; 6:2328-2339. [PMID: 33521471 PMCID: PMC7841943 DOI: 10.1021/acsomega.0c05638] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 01/04/2021] [Indexed: 06/12/2023]
Abstract
Heparin is one of the members of the glycosaminoglycan (GAG) family, which has been associated with protein aggregation diseases including Alzheimer's disease, Parkinson's disease, and prion diseases. Here, we investigate heparin-induced aggregation of bovine serum albumin (BSA) using different spectroscopic techniques [absorption, 8-anilino-1-naphthalene sulfonic acid (ANS) and thioflavin T (ThT) fluorescence binding, and far- and near-UV circular dichroism]. Kinetic measurements revealed that heparin is involved in the significant enhancement of aggregation of BSA. The outcomes showed dearth of the lag phase and a considerable change in rate constant, which provides conclusive evidence, that is, heparin-induced BSA aggregation involves the pathway of the downhill polymerization mechanism. Heparin also causes enhancement of fluorescence intensity of BSA significantly. Moreover, heparin was observed to form amyloids and amorphous aggregates of BSA which were confirmed by ThT and ANS fluorescence, respectively. Circular dichroism measurements exhibit a considerable change in the secondary and tertiary structure of the protein due to heparin. In addition, binding studies of heparin with BSA to know the cause of aggregation, isothermal titration calorimetry measurements were exploited, from which heparin was observed to promote the aggregation of BSA by virtue of electrostatic interactions between positively charged amino acid residues of protein and negatively charged groups of GAG. The nature of binding of heparin with BSA is very much apparent with an appreciable heat of interaction and is largely exothermic in nature. Moreover, the Gibbs free energy change (ΔG) is negative, which indicates spontaneous nature of binding, and the enthalpy change (ΔH) and entropy change (ΔS) are also largely negative, which suggest that the interaction is driven by hydrogen bonding.
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Affiliation(s)
- Ishfaq
Ahmad Ahanger
- Department
of Chemistry, Biochemistry and Forensic Science, Amity School of Applied
Sciences, Amity University Haryana, Gurugram 122 413, India
- Centre
for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
| | - Zahoor Ahmad Parray
- Centre
for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
| | - Khalida Nasreen
- Centre
for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
| | - Faizan Ahmad
- Centre
for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
| | - Md. Imtaiyaz Hassan
- Centre
for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
| | - Asimul Islam
- Centre
for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
| | - Anurag Sharma
- Department
of Chemistry, Biochemistry and Forensic Science, Amity School of Applied
Sciences, Amity University Haryana, Gurugram 122 413, India
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Xu X, Mao X, Wang Y, Li D, Du Z, Wu W, Jiang L, Yang J, Li J. Study on the interaction of graphene oxide‑silver nanocomposites with bovine serum albumin and the formation of nanoparticle-protein corona. Int J Biol Macromol 2018; 116:492-501. [DOI: 10.1016/j.ijbiomac.2018.05.043] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 05/07/2018] [Accepted: 05/08/2018] [Indexed: 12/12/2022]
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Staničová J, Verebová V, Beneš J. Interaction of a Potential Anticancer Agent Hypericin and its Model Compound Emodin with DNA and Bovine Serum Albumin. In Vivo 2018; 32:1063-1070. [PMID: 30150427 DOI: 10.21873/invivo.11347] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 06/05/2018] [Accepted: 06/11/2018] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM We report the incorporation of prospective anticancer agent hypericin into DNA and bovine serum albumin (BSA), respectively, with emphasis on comparison of the differences in interaction mode between hypericin and its model compound emodin. MATERIALS AND METHODS Spectrophotometric methods were used for determination of the binding constants of the drug complex with biomacromolecules. Differential scanning calorimetry was applied for evaluation of drug-macromolecule complex thermal stability. RESULTS The strength of interaction expressed by binding constants was found to be 4.0×104 l/mol for hypericin-DNA and 8.1×104 l/mol for emodin-DNA complex. Both molecules stabilize bovine serum albumin macromolecule and bind into the hydrophobic cavity in IIA subunit but their localization within the molecule is different. CONCLUSION Anticancer agent hypericin and its derivative emodin interact with DNA with medium strength and are probably incorporated into the groove of DNA by hydrogen bonds. Bovine serum albumin can serve as a transport protein for hypericin since the binding force between both molecules is adequate.
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Affiliation(s)
- Jana Staničová
- Institute of Biophysics, University of Veterinary Medicine & Pharmacy, Košice, Slovakia .,Institute of Biophysics & Informatics, First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Valéria Verebová
- Institute of Biophysics, University of Veterinary Medicine & Pharmacy, Košice, Slovakia
| | - Jiří Beneš
- Institute of Biophysics & Informatics, First Faculty of Medicine, Charles University, Prague, Czech Republic
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Xu X, Wang Y, Wang H, Su H, Mao X, Jiang L, Liu M, Sun D, Hou S. Synthesis of triangular silver nanoprisms and studies on the interactions with human serum albumin. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.02.103] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Qin M, Yin T, Wang S, Shen W. Spectroscopic Investigation on the Interactions between Cationic Surfactants and Bovine Serum Albumin. J DISPER SCI TECHNOL 2015. [DOI: 10.1080/01932691.2014.973031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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11
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Chauhan S, Chauhan M, Sharma P, Rana D. Thermodynamics and micellization of cetyltrimethyl ammonium bromide in the presence of lysozyme. J Mol Liq 2013. [DOI: 10.1016/j.molliq.2013.06.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Lystvet SM, Volden S, Yasuda M, Halskau Ø, Glomm WR. Emergent membrane-affecting properties of BSA-gold nanoparticle constructs. NANOSCALE 2011; 3:1788-1797. [PMID: 21359387 DOI: 10.1039/c0nr00948b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
By adsorbing bovine serum albumin (BSA) on gold nanoparticles (Aunps) with diameters 30 nm and 80 nm, different degrees of protein unfolding were obtained. Adsorption and adlayer conformation were characterized by UV-vis spectroscopy, ζ-potential measurements, steady-state and time-resolved fluorescence. The unfolding was also studied using 1-anilino-8-naphthalene sulfonate (ANS) as an extrinsic probe, showing that BSA unfolds more on 80 nm Aunp than on 30 nm Aunp. Langmuir monolayer studies using two distinct methods of introducing the BSA and BSA-Aunp constructs accompanied with Brewster Angle Microscopy (BAM) and Digital Video Microscope (DVM) imaging demonstrated that BSA-Aunp constructs induce film miscibility with L-α-phosphatidylethanolamine not seen for BSA or Aunp alone. The changes induced by partial unfolding clearly give better film-penetration ability, as well as disruption of liquid crystalline domains in the film, thereby inducing film miscibility. Gold or protein only does not possess the nanoscale film-affecting properties of the protein-gold constructs, and as such the surface-active and miscibility-affecting characteristics of the BSA-Aunp represent emergent qualities.
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Affiliation(s)
- Sina M Lystvet
- Ugelstad Laboratory, Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), N-7491, Trondheim, Norway.
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Characterization of different conformations of bovine serum albumin and their propensity to aggregate in the presence of N-cetyl-N,N,N-trimethyl ammonium bromide. J Colloid Interface Sci 2010; 343:454-62. [DOI: 10.1016/j.jcis.2009.12.012] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2009] [Revised: 11/27/2009] [Accepted: 12/02/2009] [Indexed: 11/18/2022]
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Liu B, Guo Y, Wang J, Liu LJ, Wang D, Zhang LQ, Xu R, Zhang XD. Investigation on sonocatalytic damage of BSA under ultrasonic irradiation by FeIII complexes with some aminocarboxylic acid. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2010. [DOI: 10.1134/s0036024410130042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Saadeh SM, Yasseen Z, Sharif FA, Abu Shawish HM. New room temperature ionic liquids with interesting ecotoxicological and antimicrobial properties. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2009; 72:1805-1809. [PMID: 19201024 DOI: 10.1016/j.ecoenv.2008.12.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2008] [Revised: 12/10/2008] [Accepted: 12/21/2008] [Indexed: 05/27/2023]
Abstract
A new set of room temperature ionic liquids (RTIL), tetrabutylammonium (TBA) salts: formate, acetate, propionate, butyrate, benzoate, nitrobenzoate, cinnamate, salicylate, sulfanilate, linoleate, and oleate, were prepared by neutralization of tetrabutylammonium hydroxide (TBA OH) and the corresponding acid. The compounds showed interesting chemical and biological properties. They are soluble in water and organic solvents producing conducting solutions and are effective against certain Gram-negative as well as Gram-positive bacteria. Notably, they affected some proteins such as bovine serum albumin (BSA) and catalase (CAT) as inferred by following the fluorescence emission spectra.
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Affiliation(s)
- Salman M Saadeh
- Chemistry Department, The Islamic University, Gaza, Palestine.
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Liu M, Sun DZ, Li B, Zhu LY. Studies on the Binding of Bis–Quaternary Ammonium Surfactants to Bovine Serum Albumins by Microcalorimetry and Circular Dichroism. J DISPER SCI TECHNOL 2009. [DOI: 10.1080/01932690802548635] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Chakraborty T, Chakraborty I, Moulik SP, Ghosh S. Physicochemical and conformational studies on BSA-surfactant interaction in aqueous medium. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:3062-74. [PMID: 19437713 DOI: 10.1021/la803797x] [Citation(s) in RCA: 168] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
In this paper, results of physicochemical studies on the interaction of bovine serum albumin (BSA) with alkyltrimethylammonium bromide (ATAB), pentaethylene glycol mono-n-dodecyl ether (C12E5), and sodium dodecyl sulfate (SDS) under the experimental conditions of phosphate buffer at pH 7 in the presence of 10 mM sodium bromide (NaBr), maintaining the ionic strength of the overall solution at micro = 0.015 M, have been presented and discussed. Here, BSA-ATAB corresponds to a polyion-surfactant system bearing opposite charges. BSA precipitated out of the solution on addition of ATAB solution over a certain range of ATAB concentration, the concentration range being dependent on the particular member of the ATAB family. In our earlier reports on the precipitation of oppositely charged polymer-surfactant, the tensiometric profile for surfactant addition in polymer solution differed significantly from that expected from addition of surfactant in the dispersion medium. In the present study, the precipitation process could hardly affect the smoothness of the tensiometric profile. This indicates the interaction process is operative in bulk solution. Microcalorimetric profiles also evidenced an extra hump in the interaction profile at lower surfactant concentrations, without much affecting the dilution enthalpograms beyond micellization. This interaction appeared unimodal and the extent of interaction increased with increasing tail length of ATAB, evidencing the hydrophobic effect to be an important factor. Addition of salt (NaBr) also affected the nature of interaction: at lower concentration of NaBr, the interaction was mildly assisted, whereas 50 mM NaBr fairly assisted the interaction. The nonionic surfactant C12E5 modestly interacted with BSA. The anionic amphiphile SDS, on the other hand, interacted with BSA in two distinctly different stages, as evidenced from the tensiometric profile. The complexity of the BSA-SDS tensiometric isotherm compared to that of BSA-ATAB arose from the presence of cationic binding sites adjacent to hydrophobic patches of BSA in its native state, so that electrostatic and hydrophobic interactions can cooperatively operate side by side. The interfacial saturation occurred at a lower concentration in the presence of BSA compared to the normal cmc of SDS under identical solution conditions in the absence of BSA, which was slightly delayed for nonionic C12E5. The multitechnique approach evidenced that different experimental techniques probe different physicochemical phenomena and an attempt to show the concurrence of the break points in different techniques is only diluting the essence of this area.
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Affiliation(s)
- Tanushree Chakraborty
- Centre for Surface Science, Department of Chemistry, Jadavpur University, Kolkata-700 032, India
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Wang J, Wang Y, Gao J, Hu P, Guan H, Zhang L, Xu R, Chen X, Zhang X. Investigation on damage of BSA molecules under irradiation of low frequency ultrasound in the presence of FeIII-tartrate complexes. ULTRASONICS SONOCHEMISTRY 2009; 16:41-49. [PMID: 18706848 DOI: 10.1016/j.ultsonch.2008.07.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2008] [Revised: 06/19/2008] [Accepted: 07/08/2008] [Indexed: 05/26/2023]
Abstract
The interaction between bovine serum albumin (BSA) and Fe(III)-tartrate complexes ([Fe(III)(tar)(H(2)O)(3)](-) and [Fe(III)(tar)(2)](5-)) as well as the damage of BSA in the presence of Fe(III)-tartrate complexes under ultrasonic irradiation was studied by UV-vis and fluorescence spectra. In addition, the influences of ultrasonic irradiation time, Fe(III)-tartrate complex concentration, ionic strength and solution acidity (pH value) were also examined on the damage of BSA. The results showed that the fluorescence quenching of BSA caused by the Fe(III)-tartrate complexes belonged to the static quenching. The BSA and Fe(III)-tartrate complexes interacted with each other mainly through weak interaction and coordinate actions. The corresponding binding association constants (K) and the binding site numbers (n) were calculated. The results were as follows: K(1)=1.67 x 10(3) L mol(-1) and n(1)=0.9699 for [Fe(III)(tar)(H(2)O)(3)](-), K(2)=1.54 x 10(3) L mol(-1) and n(2)=0.8754 for [Fe(III)(tar)(2)](5-). Otherwise, under ultrasonic irradiation the BSA molecules were obviously damaged by the Fe(III)-tartrate complexes. The damage degree rose up with the increase of ultrasonic irradiation time, Fe(III)-tartrate complex concentration, pH value and ionic strength. And that, [Fe(III)(tar)(H(2)O)(3)](-) exhibited higher sonocatalytic activity in a way than [Fe(III)(tar)(2)](5-).
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Affiliation(s)
- Jun Wang
- Department of Chemistry, Liaoning University, Shenyang 110036, People's Republic of China.
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An insight into the micellization of dodecyldimethylethylammonium bromide (DDAB) in the presence of bovine serum albumin (BSA). J Colloid Interface Sci 2008; 323:426-34. [DOI: 10.1016/j.jcis.2008.04.026] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2008] [Revised: 04/09/2008] [Accepted: 04/10/2008] [Indexed: 11/19/2022]
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Mehta S, Bhawna, Kaur K, Bhasin K. Micellization behavior of cationic surfactant dodecyldimethylethylammonium bromide (DDAB) in the presence of papain. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2007.09.029] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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The effect of sodium dodecyl sulfate on the conformation of bovine serum albumin. Colloids Surf A Physicochem Eng Asp 2007. [DOI: 10.1016/j.colsurfa.2006.10.058] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Rafati AA, Bordbar AK, Gharibi H, Amini MK, Safarpour MA. The Interactions of a Homologous Series of Cationic Surfactants with Bovine Serum Albumin (BSA) Studied Using Surfactant Membrane Selective Electrodes. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2004. [DOI: 10.1246/bcsj.77.1111] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Abstract
In an attempt to explain the mechanism of protein stabilization conferred by detergents, we investigated the effect of Tween 80 on aggregation of bovine serum albumin (BSA) using circular dichroism (CD) and native gel electrophoresis. CD thermal scans showed that BSA denatures at about 54 degrees C in 20 mM Tris, pH 7.2, forming soluble aggregates. Because of this aggregation, thermal unfolding of BSA under these conditions was only partially reversible, as indicated by reduced signal changes in the second scan. On the basis of this observation, BSA was thermally stressed by incubating at 50, 60, or 70 degrees C for 15 min and then analyzed by native gel electrophoresis. There was no change at 50 degrees C before and after heating, whereas at 60 degrees C the intensity of the original monomer and dimer bands decreased and that of aggregate bands increased, with much greater changes at 70 degrees C. Addition of Tween 80 before heating reduced aggregation and increased the monomer content. These effects of Tween 80 were greater as its concentration was increased from 0.001 to 1%. There was no correlation between the protective effects and the critical micelle concentration (CMC) of Tween 80. Addition of Tween 80 after 15 min incubation at 70 degrees C, or after 70 degrees C heating followed by cooling to room temperature, had no effect, demonstrating that Tween 80 must be present during the 70 degrees C heating step to be protective. Native gel electrophoresis run at 60 degrees C showed multiple aggregate bands and new bands migrating around the dimer and monomer positions, which may correspond to precursors of aggregates. Tween 80 reduced formation of these new bands and aggregates, further demonstrating that it must be present during heating. Finally, CD thermal scans showed that 0.1% Tween 80 only slightly increased the apparent melting temperature. The observed stabilization of BSA against heat treatment is, therefore, due to Tween 80 altering aggregation behavior rather than inducing significant stabilization of the native state.
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Affiliation(s)
- T Arakawa
- Alliance Protein Laboratories, 3957 Corte Cancion, Thousand Oaks, California 91360, USA.
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