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Fatima M, Nabi F, Khan RH, Naeem A. Investigating the binding interaction of quinoline yellow with bovine serum albumin and anti-amyloidogenic behavior of ferulic acid on QY-induced BSA fibrils. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 313:124076. [PMID: 38442614 DOI: 10.1016/j.saa.2024.124076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 01/30/2024] [Accepted: 02/21/2024] [Indexed: 03/07/2024]
Abstract
Protein aggregation induces profound changes in the structure along with the conformation of the protein, and is responsible for the pathogenesis of a number of neurodegenerative conditions such as Huntington's, Creutzfeldt-Jacob, Type II diabetes mellitus, Alzheimer's, etc. Numerous multi-spectroscopic approaches and in-silico experiments were utilized to investigate BSA's biomolecular interaction and aggregation in the presence of quinoline yellow. The present research investigation evaluated the interaction of BSA with the food colorant (QY) at two different pH (7.4 and 2.0). The development of the BSA-QY complex was established with UV visible and fluorescence spectroscopy. The quenching of fluorescence upon the interaction of BSA with QY revealed the static nature of quenching mechanism. The Kb value obtained from our result is 4. 54 × 10-4 M-1. The results from the competitive site marker study infer that quinoline yellow is binding with the sub-domain IB of bovine serum albumin, specifically on site III. Three-dimensional fluorescence and synchronous fluorescence spectroscopy were applied for monitoring the alterations in the microenvironment of BSA upon the addition of quinoline yellow. The results from turbidity and RLS studies showed that higher concentrations of QY (80-400 µM) triggered bovine serum albumin (BSA) aggregation at pH 2.0. At pH 7.4, QY couldn't manage to trigger bovine serum albumin aggregation, perhaps because of the repulsion between negatively charged dye (QY) and anionic bovine serum albumin. The results from far-UV CD, Congo Red, and scanning electron microscopy implicate that the QY-induced aggregates exhibit amyloid fibril-like structures. Molecular docking results revealed that hydrophobic interactions, hydrogen bonding, and Pi-Sulfur interactions contribute to QY-induced aggregation of BSA. Further, the amyloid inhibitory potential of ferulic acid (FA), a phenolic acid on QY-induced aggregation of BSA, has also been assessed. The QY-induced amyloid fibrils are FA-soluble, as confirmed by turbidity, RLS, and far-UV CD studies. Far-UV CD results showed that FA retains α helix and inhibits cross β sheet formation when the BSA samples were pre-incubated with increasing concentrations of FA (0-500 µM). Our findings conclude that QY dye successfully stimulates BSA aggregation, but ferulic acid inhibits QY-induced aggregation of BSA. Thus, FA can serve as a therapeutic agent and can help in the treatment of various amyloid-related conditions.
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Affiliation(s)
- Maham Fatima
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh 202002, U.P., India
| | - Faisal Nabi
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, U.P., India
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, U.P., India
| | - Aabgeena Naeem
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh 202002, U.P., India.
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2
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Khachatrian AA, Mukhametzyanov TA, Salikhov RZ, Klimova AE, Gafurov ZN, Kantyukov AO, Yakhvarov DG, Garifullin BF, Mironova DA, Voloshina AD, Solomonov BN. New ionic liquids based on 5-fluorouracil: Tuning of BSA binding and cytotoxicity. Int J Biol Macromol 2024; 257:128642. [PMID: 38061517 DOI: 10.1016/j.ijbiomac.2023.128642] [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: 10/13/2023] [Revised: 12/02/2023] [Accepted: 12/04/2023] [Indexed: 01/26/2024]
Abstract
In this work, we describe the synthesis, interactions with bovine serum albumin, and cytotoxicity of new ionic liquids based on 5-fluorouracil (API-ILs) with different cations (imidazolium, choline, isoquinolinium, guanidinium). The secondary and tertiary structure of BSA in solutions with different concentrations of API-ILs was monitored by the circular dichroism (CD) technique. The addition of API-ILs does not lead to structural changes in BSA. A quenching of fluorescence spectra intensity of BSA in presence of all API-ILs was observed, allowing the quantification of binding between API-ILs and BSA. The preferred localization of both ions in API-ILs differs significantly depending on the structure of the cation according to molecular docking. The aggregation of BSA in presence of API-ILs was analyzed by the dynamic light scattering (DLS) method, revealing a moderate increase in particle size. Cytotoxicity and selectivity of API-ILs on cancer and normal cell lines were estimated, showing a clear modification of the pharmaceutic activity of ionic liquid compared to 5-fluorouracil.
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Affiliation(s)
- Artashes A Khachatrian
- Department of Physical Chemistry, Kazan Federal University, Kremlyovskaya str.18, Kazan 420008, Russian Federation.
| | - Timur A Mukhametzyanov
- Department of Physical Chemistry, Kazan Federal University, Kremlyovskaya str.18, Kazan 420008, Russian Federation
| | - Ramazan Z Salikhov
- Department of Physical Chemistry, Kazan Federal University, Kremlyovskaya str.18, Kazan 420008, Russian Federation
| | - Alexandra E Klimova
- Department of Physical Chemistry, Kazan Federal University, Kremlyovskaya str.18, Kazan 420008, Russian Federation
| | - Zufar N Gafurov
- Department of Physical Chemistry, Kazan Federal University, Kremlyovskaya str.18, Kazan 420008, Russian Federation; Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, Arbuzov str. 8, 420088 Kazan, Russian Federation
| | - Artyom O Kantyukov
- Department of Physical Chemistry, Kazan Federal University, Kremlyovskaya str.18, Kazan 420008, Russian Federation; Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, Arbuzov str. 8, 420088 Kazan, Russian Federation
| | - Dmitry G Yakhvarov
- Department of Physical Chemistry, Kazan Federal University, Kremlyovskaya str.18, Kazan 420008, Russian Federation; Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, Arbuzov str. 8, 420088 Kazan, Russian Federation
| | - Bulat F Garifullin
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, Arbuzov str. 8, 420088 Kazan, Russian Federation
| | - Diana A Mironova
- Department of Organic and Medicinal Chemistry, Kazan Federal University, Kremlyovskaya str. 18, 420008 Kazan, Russian Federation
| | - Alexandra D Voloshina
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, Arbuzov str. 8, 420088 Kazan, Russian Federation
| | - Boris N Solomonov
- Department of Physical Chemistry, Kazan Federal University, Kremlyovskaya str.18, Kazan 420008, Russian Federation
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3
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Anwar S, Kar RK, Haque MA, Dahiya R, Gupta P, Islam A, Ahmad F, Hassan MI. Effect of pH on the structure and function of pyruvate dehydrogenase kinase 3: Combined spectroscopic and MD simulation studies. Int J Biol Macromol 2020; 147:768-777. [PMID: 31982536 DOI: 10.1016/j.ijbiomac.2020.01.218] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 01/21/2020] [Accepted: 01/22/2020] [Indexed: 12/22/2022]
Abstract
Pyruvate dehydrogenase kinase-3 (PDK3) plays important role in the glucose metabolism and is associated with cancer progression, and thus being considered as an attractive target for cancer therapy. In this study, we employed spectroscopic techniques to study the structural and conformational changes in the PDK3 at varying pH conditions ranging from pH 2.0 to 12.0. UV/Vis, fluorescence and circular dichroism spectroscopic measurements revealed that PDK3 maintains its native-like structure (both secondary and tertiary) in the alkaline conditions (pH 7.0-12.0). However, a significant loss in the structure was observed under acidic conditions (pH 2.0-6.0). The propensity of aggregate formation at pH 4.0 was estimated by thioflavin T fluorescence measurements. To further complement structural data, kinase activity assay was performed, and maximum activity of PDK3 was observed at pH 7.0-8.0 range; whereas, its activity was lost under acidic pH. To further see conformational changes at atomistic level we have performed all-atom molecular dynamics at different pH conditions for 150 ns. A well defined correlation was observed between experimental and computational studies. This work highlights the significance of structural dependence of pH for wide implications in protein-protein interaction, biological function and drug design procedures.
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Affiliation(s)
- Saleha Anwar
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
| | - Rajiv K Kar
- Fritz Haber Center for Molecular Dynamic Research, Hebrew University of Jerusalem, Israel
| | - Md Anzarul Haque
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
| | - Rashmi Dahiya
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
| | - Preeti Gupta
- 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
| | - 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.
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4
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Khomenko VA, Sidorin EV, Bakholdina SI, Naberezhnykh GA, Kim NY, Stenkova AM, Chernysheva NY, Isaeva MP, Solov'eva TF. Inclusion Bodies of Recombinant OmpF Porin from Yersinia pseudotuberculosis: Properties and Structural Characterization. BIOCHEMISTRY (MOSCOW) 2019; 84:672-685. [PMID: 31238867 DOI: 10.1134/s0006297919060105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Mature pore-forming OmpF protein from the outer membrane of Yersinia pseudotuberculosis was expressed in Escherichia coli in the form of inclusion bodies (IBs) under different cultivation conditions. The properties and structural organization of the IBs as well as the structure of the recombinant porin (rOmpF) solubilized from the IBs were investigated using electron microscopy, dynamic light scattering, optical spectroscopy, and specific hydrophobic dyes. The size, shape, and stability of the IBs under denaturing solutions were determined. It was found that the IBs were readily soluble in SDS and more resistant to urea. Dissolution of the IBs in both denaturing agents led to formation of a heterogeneous in size population of oligomeric particles. The IBs contained an intermediate form of the rOmpF with native-like secondary structure and elements of tertiary structure, which was able to penetrate a lipid bilayer and adopt a functionally active conformation. There were no significant differences in the properties and structure between the examined IBs formed at different concentrations of the inducer (IPTG). However, the content of amyloids in the IBs increased with increasing concentration of the inducer. These results contribute to the development of new approaches for the production of active proteins from IBs, as well as biologically and functionally active IBs.
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Affiliation(s)
- V A Khomenko
- Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, 690022, Russia
| | - E V Sidorin
- Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, 690022, Russia
| | - S I Bakholdina
- Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, 690022, Russia
| | - G A Naberezhnykh
- Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, 690022, Russia
| | - N Yu Kim
- Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, 690022, Russia
| | - A M Stenkova
- Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, 690022, Russia
| | - N Yu Chernysheva
- Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, 690022, Russia
| | - M P Isaeva
- Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, 690022, Russia
| | - T F Solov'eva
- Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, 690022, Russia.
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5
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Al-Shabib NA, Khan JM, Alsenaidy MA, Alsenaidy AM, Khan MS, Husain FM, Khan MR, Naseem M, Sen P, Alam P, Khan RH. Unveiling the stimulatory effects of tartrazine on human and bovine serum albumin fibrillogenesis: Spectroscopic and microscopic study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 191:116-124. [PMID: 29028503 DOI: 10.1016/j.saa.2017.09.062] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 08/20/2017] [Accepted: 09/20/2017] [Indexed: 06/07/2023]
Abstract
Amyloid fibrils are playing key role in the pathogenesis of various neurodegenerative diseases. Generally anionic molecules are known to induce amyloid fibril in several proteins. In this work, we have studied the effect of anionic food additive dye i.e., tartrazine (TZ) on the amyloid fibril formation of human serum albumins (HSA) and bovine serum albumin (BSA) at pHs7.4 and 3.5. We have employed various biophysical methods like, turbidity measurements, Rayleigh Light Scattering (RLS), Dynamic Light Scattering (DLS), intrinsic fluorescence, Congo red assay, far-UV CD, transmission electron microscopy (TEM) and atomic force microscopy (AFM) to decipher the mechanism of TZ-induce amyloid fibril formation in both the serum albumins at pHs7.4 and 3.5. The obtained results suggest that both the albumins forms amyloid-like aggregates in the presence of 1.0 to 15.0mM of TZ at pH3.5, but no amyloid fibril were seen at pH7.4. The possible cause of TZ-induced amyloid fibril formation is electrostatic and hydrophobic interaction because sulfate group of TZ may have interacted electrostatically with positively charged amino acids of the albumins at pH3.5 and increased protein-protein and protein-TZ interactions leading to amyloid fibril formation. The TEM, RLS and DLS results are suggesting that BSA forms bigger size amyloids compared to HSA, may be due to high surface hydrophobicity of BSA.
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Affiliation(s)
- Nasser Abdulatif Al-Shabib
- Department of Food Science and Nutrition, Faculty of Food and Agricultural Sciences, King Saud University, 2460, Riyadh 11451, Saudi Arabia.
| | - Javed Masood Khan
- Department of Food Science and Nutrition, Faculty of Food and Agricultural Sciences, King Saud University, 2460, Riyadh 11451, Saudi Arabia
| | - Mohammad A Alsenaidy
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Abdulrahman M Alsenaidy
- Protein Research Chair, Department of Biochemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Mohd Shahnawaz Khan
- Protein Research Chair, Department of Biochemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Fohad Mabood Husain
- Department of Food Science and Nutrition, Faculty of Food and Agricultural Sciences, King Saud University, 2460, Riyadh 11451, Saudi Arabia
| | - Mohammad Rashid Khan
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Mohammad Naseem
- Electrical Engineering Department, Integral University Lucknow, 226026, India
| | - Priyankar Sen
- Centre for Bioseparation Technology, VIT University, Vellore 632014, India
| | - Parvez Alam
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
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6
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Biophysical insight into the interaction mechanism of plant derived polyphenolic compound tannic acid with homologous mammalian serum albumins. Int J Biol Macromol 2017; 107:2450-2464. [PMID: 29102789 DOI: 10.1016/j.ijbiomac.2017.10.136] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 10/19/2017] [Accepted: 10/20/2017] [Indexed: 01/25/2023]
Abstract
Numerous phenolic compounds have been reported in the last decade that have a good antioxidant property and interaction affinity towards mammalian serum albumins. In the present study, we have utilized mammalian serum albumins as a model protein to examine their comparative interaction property with polyphenolic compound tannic acid (TA) by using various spectroscopic and calorimetric methods We have also monitored the esterase and antioxidant activity of mammalian serum albumins in the absence and presence of TA. The obtain results recommended that the TA have a good binding affinity (∼104 to 106M-1) towards mammalian serum albumins and shows double sequential binding sites, which depends on the concentration of TA that induced the conformational alteration which responsible for the thermal stability of proteins. Binding affinity, structural transition and thermodynamic parameters were calculated from spectroscopic and calorimetric method reveals that non-covalent interaction causes partial conformational alteration in the secondary structure of protein ie.; increase in α-helical content with decrease in β-sheet, random coil and other structure. Meanwhile, we have found that esterase activities of serum albumins were also stabilized against hydrolysis and shows higher antioxidant activity in the presence of TA because albumins its self have an immense antioxidant activity beside TA.
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7
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Wu Y, Zhang H, Wang Y. Conformational and functional changes of bovine serum albumin induced by TiO2 nanoparticles binding. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.07.116] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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8
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Khan JM, Khan MS, Alsenaidy MA, Ahmed A, Sen P, Oves M, Al-Shabib NA, Khan RH. Sodium louroyl sarcosinate (sarkosyl) modulate amyloid fibril formation in hen egg white lysozyme (HEWL) at alkaline pH: a molecular insight study. J Biomol Struct Dyn 2017; 36:1550-1565. [DOI: 10.1080/07391102.2017.1329097] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Javed Masood Khan
- Faculty of Food and Agricultural Sciences, Department of Food Science and Nutrition, King Saud University, 2460 Riyadh 11451, Saudi Arabia
| | - Mohd Shahnawaz Khan
- Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | | | - Anwar Ahmed
- Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Priyankar Sen
- Centre for Bioseparation Technology, VIT University, Vellore 632014, India
| | - Mohammad Oves
- Center of Excellence in Enviromental Studies, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Nasser Abdulatif Al-Shabib
- Faculty of Food and Agricultural Sciences, Department of Food Science and Nutrition, King Saud University, 2460 Riyadh 11451, Saudi Arabia
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, India
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9
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Synthetic food additive dye “Tartrazine” triggers amorphous aggregation in cationic myoglobin. Int J Biol Macromol 2017; 98:277-286. [DOI: 10.1016/j.ijbiomac.2017.01.097] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 12/27/2016] [Accepted: 01/23/2017] [Indexed: 12/18/2022]
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10
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Pal S, Maity S, Sardar S, Chakraborty J, Halder UC. Insight into the co-solvent induced conformational changes and aggregation of bovine β-lactoglobulin. Int J Biol Macromol 2015; 84:121-34. [PMID: 26657584 DOI: 10.1016/j.ijbiomac.2015.11.055] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2015] [Revised: 09/05/2015] [Accepted: 11/20/2015] [Indexed: 11/15/2022]
Abstract
Many proteins form ordered irreversible aggregates called amyloid fibrils which are responsible for several neurodegenerative diseases. β-lactoglobulin (β-lg), an important globular milk protein, self-assembles to form amyloid-like fibrils on heating at low pH. The present study investigated the effects of two commonly used organic solvents acetonitrile (MeCN) and antimicrobial preservative benzyl alcohol (BA) on the conformation and self-assembly of β-lg at ambient condition. Both MeCN and BA induced a concentration-dependent conformational change showing exposure of hydrophobic patches, loss of tertiary structure and higher α-helical structure at moderate concentrations. In the presence of 50-80% (v/v) MeCN and 1.5-3% (v/v) BA further structural transitions from α-helical to non-native β-sheet structure were observed with a molten globule-like intermediate at 70% MeCN. These non-native β-sheet structures have high tendency to form aggregates. The formation of β-lg self-assembly was confirmed by Thioflavin T studies, Congo red assay, Rayleigh scattering and dynamic light scattering analysis. Transmission electron microscopy studies showed amyloid fibril formation in both MeCN and BA. Our results showed that BA enhances the unfolding and self-assembly of β-lg at much lower concentration than MeCN. Thus solvent composition forces the protein to achieve the non-native structures which are responsible for protein aggregation.
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Affiliation(s)
- Sampa Pal
- Organic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata, 700032, India
| | - Sanhita Maity
- Organic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata, 700032, India
| | - Subrata Sardar
- Organic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata, 700032, India
| | - Jishnu Chakraborty
- Organic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata, 700032, India
| | - Umesh Chandra Halder
- Organic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata, 700032, India.
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Ishtikhar M, Usmani SS, Gull N, Badr G, Mahmoud MH, Khan RH. Inhibitory effect of copper nanoparticles on rosin modified surfactant induced aggregation of lysozyme. Int J Biol Macromol 2015; 78:379-88. [DOI: 10.1016/j.ijbiomac.2015.03.069] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Revised: 03/10/2015] [Accepted: 03/12/2015] [Indexed: 12/19/2022]
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12
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Cammarata M, Lin KY, Pruet J, Liu HW, Brodbelt J. Probing the Unfolding of Myoglobin and Domain C of PARP-1 with Covalent Labeling and Top-Down Ultraviolet Photodissociation Mass Spectrometry. Anal Chem 2014; 86:2534-42. [DOI: 10.1021/ac4036235] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Michael Cammarata
- Department of Chemistry, University of Texas at Austin, 1 University
Station A5300, Austin, Texas 78212, United States
| | - Ke-Yi Lin
- Department of Chemistry, University of Texas at Austin, 1 University
Station A5300, Austin, Texas 78212, United States
| | - Jeff Pruet
- Department of Chemistry, University of Texas at Austin, 1 University
Station A5300, Austin, Texas 78212, United States
| | - Hung-wen Liu
- Department of Chemistry, University of Texas at Austin, 1 University
Station A5300, Austin, Texas 78212, United States
| | - Jennifer Brodbelt
- Department of Chemistry, University of Texas at Austin, 1 University
Station A5300, Austin, Texas 78212, United States
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Khan JM, Abdulrehman SA, Zaidi FK, Gourinath S, Khan RH. Hydrophobicity alone can not trigger aggregation in protonated mammalian serum albumins. Phys Chem Chem Phys 2014; 16:5150-61. [DOI: 10.1039/c3cp54941k] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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14
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Khan JM, Chaturvedi SK, Khan RH. Elucidating the mode of action of urea on mammalian serum albumins and protective effect of sodium dodecyl sulfate. Biochem Biophys Res Commun 2013; 441:681-8. [DOI: 10.1016/j.bbrc.2013.10.055] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Accepted: 10/11/2013] [Indexed: 11/30/2022]
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15
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Non-native States of Bovine Beta-Lactoglobulin Induced by Acetonitrile: pH-Dependent Unfolding of the Two Genetic Variants A and B. Cell Biochem Biophys 2012; 66:175-85. [DOI: 10.1007/s12013-012-9466-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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16
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Ahmad E, Sen P, Khan RH. Structural stability as a probe for molecular evolution of homologous albumins studied by spectroscopy and bioinformatics. Cell Biochem Biophys 2012; 61:313-25. [PMID: 21748244 DOI: 10.1007/s12013-011-9214-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Equilibrium unfolding by guanidinium hydrochloride (GuHCl) and urea as well as evolutionary trends of two homologous albumins, pig serum albumin (PSA) and rabbit serum albumin (RSA), has been studied with circular dichroism, tryptophanyl fluorescence and bioinformatics. GuHCl cannot distinguish the contribution of electrostatic interactions to the proteins which were otherwise effectively monitored by urea. Higher differences in free energy changes due to urea than GuHCl show electrostatic interactions among charged amino acids are possibly responsible for higher structural stability of RSA in comparison to PSA. From the sequence of HSA and RSA, deletion of arginine at position 117 and the presence of one extra tryptophan at position 135 may possess some clue for lesser stability of PSA. Here, for comparison, chemical unfolding data of HSA and BSA had been taken into consideration. We found that thermodynamically RSA and PSA are closer to HSA and BSA, respectively, in accordance with their sequence homologies. Taxonomically, rabbit belongs to lagomorph which is closer to hominids than ungulates. Hence, on the basis of these thermodynamic data of protein denaturation of different species we can use this new approach to analyze the phylogenetic relationship among the major clades of eutherian mammals to obtain their evolutionary trends.
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Affiliation(s)
- Ejaz Ahmad
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, India
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17
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Tkaczyk C, Huk OL, Mwale F, Antoniou J, Zukor DJ, Petit A, Tabrizian M. Investigation of the binding of Cr(III) complexes to bovine and human serum proteins: a proteomic approach. J Biomed Mater Res A 2010; 94:214-22. [PMID: 20166223 DOI: 10.1002/jbm.a.32700] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Chromium (Cr) compounds are widely used in alloys manufacturing and forming processes. One of the main concerns in the use of cobalt-chromium (Co-Cr) alloy-based implants is the long-term fate of Co and Cr ions in the blood, organs, and urine of patients. Our previous studies have shown that Cr(III) forms complexes in different cell culture media, whereas Cr(VI) does not form any detectable structure under the same conditions. Because Cr(VI) is known to be more toxic than Cr(III), we hypothesized that the presence of serum proteins in the molecular structure of Cr(III) may be responsible for the difference in toxicity. We investigated the interaction of the Cr(III) complexes with serum proteins and their internalization by U937 macrophage-like cells. By using a proteomic approach, we showed that in the presence of fetal bovine serum, Cr(III) complexes interacted only with albumin, whereas they interacted mainly with albumin, transferrin, and immunoglobulins (Ig) in the presence of human serum (HS). Cr(III) complexes were more easily engulfed by U937 macrophage-like cells when they were formed with HS. To the best of our knowledge, this is the first report on the formation of Cr(III) complexes in the presence of serum proteins and the interaction of these complexes with U937 macrophage-like cells. (c) 2010 Wiley Periodicals, Inc. J Biomed Mater Res, 2010.
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Affiliation(s)
- Cathy Tkaczyk
- Department of Biomedical Engineering, Duff Medical Building, 3775 University Street, Montreal, Quebec H3A 2B4, Canada
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