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Pan F, Wu X, Gong L, Xu H, Yuan Y, Lu J, Zhang T, Liu J, Shang X. Dextran sulfate acting as a chaperone-like component on inhibition of amorphous aggregation and enhancing thermal stability of ovotransferrin. Food Chem 2024; 445:138720. [PMID: 38359570 DOI: 10.1016/j.foodchem.2024.138720] [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: 09/26/2023] [Revised: 01/25/2024] [Accepted: 02/06/2024] [Indexed: 02/17/2024]
Abstract
The tendency of ovotransferrin (OVT) to unfold and aggregate under 60 °C severely restricted sterilization temperature during egg processing. Searching for efficient strategies to improve OVT thermal stability is essential for improving egg product quality and processing suitability. Here, we investigated the effect of sulfate polysaccharide (dextran sulfate, DS) on heat-induced aggregation of OVT. We found that DS can effectively suppress amorphous aggregation of OVT at pH 7.0 after heating. Strikingly, the addition of 5 µM DS fully suppressed insoluble aggregates formation of 0.5 mg/mL OVT. Structure analysis confirmed that DS preserves nearly the entire secondary and tertiary structure of OVT during heating. The steric hindrance effect arising from strong electrostatic interactions between OVT and DS, coupled with reduced OVT hydrophobicity, is the underlying mechanism in suppressing protein-protein interactions, thus enhancing thermal stability. These findings suggest DS could act as protein stabilizers and chaperones, enhancing the thermostability of heat-sensitive proteins.
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Affiliation(s)
- Fengguang Pan
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Xinling Wu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Lingling Gong
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Haojie Xu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Yixin Yuan
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Jinming Lu
- College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Ting Zhang
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Jingbo Liu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Xiaomin Shang
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China.
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2
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Litberg TJ, Horowitz S. Roles of Nucleic Acids in Protein Folding, Aggregation, and Disease. ACS Chem Biol 2024; 19:809-823. [PMID: 38477936 PMCID: PMC11149768 DOI: 10.1021/acschembio.3c00695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2024]
Abstract
The role of nucleic acids in protein folding and aggregation is an area of continued research, with relevance to understanding both basic biological processes and disease. In this review, we provide an overview of the trajectory of research on both nucleic acids as chaperones and their roles in several protein misfolding diseases. We highlight key questions that remain on the biophysical and biochemical specifics of how nucleic acids have large effects on multiple proteins' folding and aggregation behavior and how this pertains to multiple protein misfolding diseases.
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Affiliation(s)
- Theodore J. Litberg
- Department of Chemistry & Biochemistry and The Knoebel Institute for Healthy Aging, University of Denver, Denver, CO, 80208, USA
- Department of Pharmacology, Northwestern University Feinberg School of Medicine, Chicago, IL, 60611, USA
- Center for Synthetic Biology, Northwestern University, Evanston, IL, 60208, USA
| | - Scott Horowitz
- Department of Chemistry & Biochemistry and The Knoebel Institute for Healthy Aging, University of Denver, Denver, CO, 80208, USA
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Zhang T, Yuan Y, Wu X, Yu P, Ji J, Chai J, Kumar Saini R, Liu J, Shang X. The level of sulfate substitution of polysaccharide regulates thermal-induced egg white protein gel properties: The characterization of gel structure and intermolecular forces. Food Res Int 2023; 173:113349. [PMID: 37803654 DOI: 10.1016/j.foodres.2023.113349] [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: 04/11/2023] [Revised: 07/28/2023] [Accepted: 08/03/2023] [Indexed: 10/08/2023]
Abstract
Sulfated polysaccharides exhibit great potential for regulating protein-protein interactions. In the present study, three sulfated microcrystalline cellulose (MCS) with different degrees of sulfate substitution (DSS: 0.33, 0.51, 0.61) were synthesized and the effects of DSS on the regulation of egg white protein (EWP) aggregation and gelation properties were investigated. The results found that the improvement of protein mechanical properties by MCS is closely related to the level of sulfate substitution. The higher the DSS, the more ordered protein aggregates and compact gel network formed during heating as compared to that of pure EWP. Lower DSS (0.33) shows little effect on the mechanical properties of EWP. Furthermore, all the MCSs could significantly destroy the tertiary structure of protein molecules during heating, while for the secondary structure, MCS with higher DSS (0.51 and 0.61) could effectively control the decreasing tendency of α-helix and increasing tendency of β-sheet. Hydrophobic interactions were recognized as the major intermolecular force in the compact mixed gels (EWP/MCS2 and EWP/MCS3 gels, DSS was 0.51 and 0.61, respectively). These findings provide a vital understanding of the gelling mechanism of the protein-polysaccharide system and the application of sulfated polysaccharides in protein-based food products.
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Affiliation(s)
- Ting Zhang
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Yixin Yuan
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Xinling Wu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Peixin Yu
- College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Jinghong Ji
- College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Jiale Chai
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Ramesh Kumar Saini
- Department of Crop Science, Konkuk University, Seoul 143-701, Republic of Korea
| | - Jingbo Liu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Xiaomin Shang
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China.
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Ramasundaram S, Saravanakumar G, Sobha S, Oh TH. Dextran Sulfate Nanocarriers: Design, Strategies and Biomedical Applications. Int J Mol Sci 2022; 24:ijms24010355. [PMID: 36613798 PMCID: PMC9820219 DOI: 10.3390/ijms24010355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/20/2022] [Accepted: 12/23/2022] [Indexed: 12/28/2022] Open
Abstract
Dextran sulfate (DXS) is a hydrophilic, non-toxic, biodegradable, biocompatible and safe biopolymer. These biomedically relevant characteristics make DXS a promising building block in the development of nanocarrier systems for several biomedical applications, including imaging and drug delivery. DXS polyanion can bind with metal oxide nanomaterials, biological receptors and therapeutic drug molecules. By taking advantage of these intriguing properties, DXS is used to functionalize or construct nanocarriers for specific applications. In particular, the diagnostic or therapeutic active agent-loaded DXS nanoparticles are prepared by simple coating, formation of polyelectrolyte complexes with other positively charged polymers or through self-assembly of amphiphilic DXS derivatives. These nanoparticles show a potential to localize the active agents at the pathological site and minimize undesired side effects. As DXS can recognize and be taken up by macrophage surface receptors, it is also used as a targeting ligand for drug delivery. Besides as a nanocarrier scaffold material, DXS has intrinsic therapeutic potential. DXS binds to thrombin, acts as an anticoagulant and exhibits an inhibitory effect against coagulation, retrovirus, scrapie virus and human immunodeficiency virus (HIV). Herein, biomedical applications involving the use of DXS as nanocarriers for drugs, biomolecules, and imaging agents have been reviewed. A special focus has been made on strategies used for loading and delivering of drugs and biomolecules meant for treating several diseases, including cancer, inflammatory diseases and ocular disease.
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Affiliation(s)
| | | | | | - Tae Hwan Oh
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38436, Republic of Korea
- Correspondence:
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Xi C, Sun Z, Chen X, Ding X, Zhang T. Characterization of coacervation behavior between whey protein isolate and propylene glycol alginate: A morphology, spectroscopy, and thermodynamics study. Food Chem X 2022; 15:100402. [PMID: 36211725 PMCID: PMC9532732 DOI: 10.1016/j.fochx.2022.100402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 07/15/2022] [Accepted: 07/22/2022] [Indexed: 11/28/2022] Open
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Zhang T, Yuan Y, Chai J, Wu X, Saini RK, Liu J, Shang X. How does dextran sulfate promote the egg white protein to form transparent hydrogel?the gelation mechanism and molecular force changes. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.107901] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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7
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Liu J, Chai J, Yuan Y, Zhang T, Saini RK, Yang M, Shang X. Dextran sulfate facilitates egg white protein to form transparent hydrogel at neutral pH: Structural, functional, and degradation properties. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107094] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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8
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Liu J, Chai J, Zhang T, Yuan Y, Saini RK, Xu M, Li S, Shang X. Phase behavior, thermodynamic and rheological properties of ovalbumin/dextran sulfate: Effect of biopolymer ratio and salt concentration. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2021.106777] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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9
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Černocká H, Izadi N, Ostatná V, Strmečki S. BSA‐Polysaccharide Interactions at Negatively Charged Electrode Surface. Effects of Current Density. ELECTROANAL 2019. [DOI: 10.1002/elan.201900231] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Hana Černocká
- Institute of BiophysicsAcademy of the Sciences of the Czech Republic v.v.i., Kralovopolska 135 612 65 Brno Czech Republic
| | - Nasim Izadi
- Institute of BiophysicsAcademy of the Sciences of the Czech Republic v.v.i., Kralovopolska 135 612 65 Brno Czech Republic
- Department of Experimental Biology, Faculty of ScienceMasaryk University Kotlarska 2 611 37 Brno Czech Republic
| | - Veronika Ostatná
- Institute of BiophysicsAcademy of the Sciences of the Czech Republic v.v.i., Kralovopolska 135 612 65 Brno Czech Republic
| | - Slađana Strmečki
- Institute of BiophysicsAcademy of the Sciences of the Czech Republic v.v.i., Kralovopolska 135 612 65 Brno Czech Republic
- Ruđer Bošković InstituteDivision for Marine and Environmental Research Bijenička 54 10 000 Zagreb Croatia
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10
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Li X, Hua Y, Chen Y, Kong X, Zhang C. Two-step complex behavior between Bowman–Birk protease inhibitor and ι -carrageenan: Effect of protein concentration, ionic strength and temperature. Food Hydrocoll 2017. [DOI: 10.1016/j.foodhyd.2016.07.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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11
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Antonov YA, Wolf BA, Moldenaers P. Inducing mixing of water-in water BSA/dextran emulsion by a strong polyelectrolyte. Food Hydrocoll 2015. [DOI: 10.1016/j.foodhyd.2014.05.029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Water JJ, Schack MM, Velazquez-Campoy A, Maltesen MJ, van de Weert M, Jorgensen L. Complex coacervates of hyaluronic acid and lysozyme: Effect on protein structure and physical stability. Eur J Pharm Biopharm 2014; 88:325-31. [DOI: 10.1016/j.ejpb.2014.09.001] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Revised: 08/27/2014] [Accepted: 09/01/2014] [Indexed: 12/19/2022]
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13
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Zhang S, Zhang Z, Lin M, Vardhanabhuti B. Raman spectroscopic characterization of structural changes in heated whey protein isolate upon soluble complex formation with pectin at near neutral pH. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:12029-12035. [PMID: 23134232 DOI: 10.1021/jf303780c] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The mechanism leading to an alteration of heat aggregation of whey protein isolate (WPI) in the presence of pectin was investigated by assessing structural changes of proteins using Raman spectroscopy. WPI solutions were heated without or with pectin at 0.015-0.2 pectin to WPI weight ratios and pH 6.0-6.4. In the absence of pectin, thermal denaturation resulted in a loss of α-helical structure and an increase in β-structure and random coils of protein. At pH 6.0 and 6.2, heat aggregation of WPI was suppressed when pectin (0.05-0.15 pectin to WPI ratios) was present as shown by a decrease in turbidity and particle size. Concomitantly, changes in the secondary structures were reduced, indicating the enhanced stability of protein structure by pectin. Raman results also revealed that α-helix and β-sheet are dominant structures in heated WPI--pectin soluble complexes, and hydrogen bonding between biopolymers increased. The effect of pectin was pH dependent, indicating the involvement of electrostatic interaction.
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Affiliation(s)
- Sha Zhang
- Food Science Program, Division of Food Systems and Bioengineering, University of Missouri, Columbia, Missouri 65211, United States
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14
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Aberkane L, Jasniewski J, Gaiani C, Hussain R, Scher J, Sanchez C. Structuration mechanism of β-lactoglobulin – acacia gum assemblies in presence of quercetin. Food Hydrocoll 2012. [DOI: 10.1016/j.foodhyd.2012.01.010] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Guo J, Yang XQ, Gu W, Yuan DB, Wang JM, Wu NN. Inhibition of glycinin thermal aggregation by an artificial chaperone sodium dodecyl sulphate. Int J Food Sci Technol 2012. [DOI: 10.1111/j.1365-2621.2011.02891.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Guo J, Zhang Y, Yang XQ. A novel enzyme cross-linked gelation method for preparing food globular protein-based transparent hydrogel. Food Hydrocoll 2012. [DOI: 10.1016/j.foodhyd.2011.06.005] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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17
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Senisterra G, Chau I, Vedadi M. Thermal denaturation assays in chemical biology. Assay Drug Dev Technol 2011; 10:128-36. [PMID: 22066913 DOI: 10.1089/adt.2011.0390] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Thermal denaturation-based methods are becoming increasingly used to characterize protein stability and interactions. Recent technical advances have made these methods more suitable for high throughput screening. Reasonable throughput and the ability to perform these screens using commonly used instruments, such as RT-PCR machines or simple plate readers equipped with heating devices, facilitate these experiments in almost any laboratory. Introducing an aggregation-based monitoring approach as well as alternative fluorophores has allowed the screening of a wider range of proteins, including membrane proteins, against large chemical libraries. Thermal denaturation-based methods are independent of protein function, which is especially useful for the identification of orphan protein function. Here, we review applications of thermal denaturation-based methods in characterizing protein stability and ligand binding, and also provide information on protocol modifications that may further increase throughput.
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Aberkane L, Jasniewski J, Gaiani C, Scher J, Sanchez C. Thermodynamic characterization of acacia gum-beta-lactoglobulin complex coacervation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:12523-33. [PMID: 20586462 DOI: 10.1021/la100705d] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The interactions of beta-lactoglobulin (BLG) with total acacia gum (TAG) in aqueous solutions have been investigated at pH 4.2 and 25 degrees C. Isothermal titration calorimetry (ITC) has been used to determine the type and magnitude of the energies involved in the complexation process of TAG to BLG. Dynamic light scattering (DLS), electrophoretic mobility (mu(E)), turbidity measurements (tau), and optical microscopy were used as complementary methods on the titration mode to better understand the sum of complicated phenomena at the origin of thermodynamic behavior. Two different binding steps were detected. Thermodynamic parameters indicate a first exothermic step with an association constant K(a1) of (48.4 +/- 3.6) x 10(7) M(-1) that appeared to be mostly enthalpy-driven. A positive heat capacity change was obtained corresponding at the signature for electrostatic interactions. The second binding step, 45 times less affinity (K(a2) = (1.1 +/- 0.1) x 10(7) M(-1)), was largely endothermic and more entropy-driven with a negative value of heat capacity change, indicative of a hydrophobic contribution to the binding process. The population distribution of the different species in solution and their sizes were determined through DLS. Dispersion turbidity of particles markedly increased and reached a maximum at a 0.015 TAG/BLG molar ratio. Largely more numerous coacervates appeared at this molar ratio (0.015) and two different kinds of morphologies were noticed for the large coacervates. Above the TAG/BLG molar ratio of 0.015, dispersions turbidity decreased, which might be due to an excess of negative charges onto particles as revealed by electrophoretic mobility measurements. The results presented in this study should provide information about the thermodynamic mechanisms of TAG/BLG binding processes and will facilitate the application of the formed supramolecular assemblies as functional ingredients in food and nonfood systems.
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Affiliation(s)
- Leïla Aberkane
- Laboratoire d'Ingénierie des Biomolécules, Nancy Université, INPL-ENSAIA, F-54505 Vandoeuvre-lès-Nancy cedex 5, France
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Xu X, Didio DM, Leister KJ, Ghose S. Disaggregation of high-molecular weight species during downstream processing to recover functional monomer. Biotechnol Prog 2009; 26:717-26. [DOI: 10.1002/btpr.373] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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20
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Svensson G, Linse S, Mani K. Chemical and Thermal Unfolding of Glypican-1: Protective Effect of Heparan Sulfate against Heat-Induced Irreversible Aggregation. Biochemistry 2009; 48:9994-10004. [DOI: 10.1021/bi901402x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Gabriel Svensson
- Department of Experimental Medical Science, Division of Neuroscience, Glycobiology Group, Lund University, Biomedical Center A13, SE-221 84 Lund, Sweden
| | - Sara Linse
- Department of Biochemistry, Lund University, Chemical Center, P.O. Box 124, SE-22100 Lund, Sweden
| | - Katrin Mani
- Department of Experimental Medical Science, Division of Neuroscience, Glycobiology Group, Lund University, Biomedical Center A13, SE-221 84 Lund, Sweden
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Interactions between β-lactoglobulin and dextran sulfate at near neutral pH and their effect on thermal stability. Food Hydrocoll 2009. [DOI: 10.1016/j.foodhyd.2008.09.006] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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22
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Bjelić S, Jelesarov I. A survey of the year 2007 literature on applications of isothermal titration calorimetry. J Mol Recognit 2008; 21:289-312. [PMID: 18729242 DOI: 10.1002/jmr.909] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Elucidation of the energetic principles of binding affinity and specificity is a central task in many branches of current sciences: biology, medicine, pharmacology, chemistry, material sciences, etc. In biomedical research, integral approaches combining structural information with in-solution biophysical data have proved to be a powerful way toward understanding the physical basis of vital cellular phenomena. Isothermal titration calorimetry (ITC) is a valuable experimental tool facilitating quantification of the thermodynamic parameters that characterize recognition processes involving biomacromolecules. The method provides access to all relevant thermodynamic information by performing a few experiments. In particular, ITC experiments allow to by-pass tedious and (rarely precise) procedures aimed at determining the changes in enthalpy and entropy upon binding by van't Hoff analysis. Notwithstanding limitations, ITC has now the reputation of being the "gold standard" and ITC data are widely used to validate theoretical predictions of thermodynamic parameters, as well as to benchmark the results of novel binding assays. In this paper, we discuss several publications from 2007 reporting ITC results. The focus is on applications in biologically oriented fields. We do not intend a comprehensive coverage of all newly accumulated information. Rather, we emphasize work which has captured our attention with originality and far-reaching analysis, or else has provided ideas for expanding the potential of the method.
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Affiliation(s)
- Sasa Bjelić
- Biochemisches Institut der Universität Zürich, Winterthurerstrasse 190, Zürich, Switzerland
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23
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Sun H, Ge B, Liu S, Chen H. Preparation of nitrocellulose (NC) immuno-affinity membrane for purification of rAPC antibody. J Sep Sci 2008; 31:1201-6. [DOI: 10.1002/jssc.200700508] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Rezaei-Ghaleh N, Ramshini H, Ebrahim-Habibi A, Moosavi-Movahedi AA, Nemat-Gorgani M. Thermal aggregation of α-chymotrypsin: Role of hydrophobic and electrostatic interactions. Biophys Chem 2008; 132:23-32. [DOI: 10.1016/j.bpc.2007.10.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2007] [Revised: 09/30/2007] [Accepted: 10/01/2007] [Indexed: 10/22/2022]
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25
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