1
|
Marques Dos Santos M, Pivniouk V, Rankl B, Walker A, Pagani G, Hertkorn N, Schmitt-Kopplin P, Müller C, Bracher F, Merl-Pham J, Hauck SM, Schloter M, Michael AN, Anderson D, Honeker L, Gozdz J, Pivniouk O, Ober C, Holbreich M, Martinez FD, Snyder SA, von Mutius E, Vercelli D. Asthma-protective agents in dust from traditional farm environments. J Allergy Clin Immunol 2023; 152:610-621. [PMID: 37271318 PMCID: PMC10680491 DOI: 10.1016/j.jaci.2023.05.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 04/05/2023] [Accepted: 05/05/2023] [Indexed: 06/06/2023]
Abstract
BACKGROUND Growing up on traditional European or US Amish dairy farms in close contact with cows and hay protects children against asthma, and airway administration of extracts from dust collected from cowsheds of those farms prevents allergic asthma in mice. OBJECTIVES This study sought to begin identifying farm-derived asthma-protective agents. METHODS Our work unfolded along 2 unbiased and independent but complementary discovery paths. Dust extracts (DEs) from protective and nonprotective farms (European and Amish cowsheds vs European sheep sheds) were analyzed by comparative nuclear magnetic resonance profiling and differential proteomics. Bioactivity-guided size fractionation focused on protective Amish cowshed DEs. Multiple in vitro and in vivo functional assays were used in both paths. Some of the proteins thus identified were characterized by in-solution and in-gel sodium dodecyl sulfate-polyacrylamide gel electrophoresis enzymatic digestion/peptide mapping followed by liquid chromatography/mass spectrometry. The cargo carried by these proteins was analyzed by untargeted liquid chromatography-high-resolution mass spectrometry. RESULTS Twelve carrier proteins of animal and plant origin, including the bovine lipocalins Bos d 2 and odorant binding protein, were enriched in DEs from protective European cowsheds. A potent asthma-protective fraction of Amish cowshed DEs (≈0.5% of the total carbon content of unfractionated extracts) contained 7 animal and plant proteins, including Bos d 2 and odorant binding protein loaded with fatty acid metabolites from plants, bacteria, and fungi. CONCLUSIONS Animals and plants from traditional farms produce proteins that transport hydrophobic microbial and plant metabolites. When delivered to mucosal surfaces, these agents might regulate airway responses.
Collapse
Affiliation(s)
| | - Vadim Pivniouk
- Department of Cellular and Molecular Medicine, The University of Arizona, Tucson, Ariz; Asthma and Airway Disease Research Center, The University of Arizona, Tucson, Ariz
| | - Bettina Rankl
- Institute for Asthma and Allergy Prevention, IAP, Helmholtz Center Munich, Munich, Germany
| | - Alesia Walker
- Research Unit Analytical Biogeochemistry, BGC, Helmholtz Center Munich, Munich, Germany
| | - Giulia Pagani
- Institute for Asthma and Allergy Prevention, IAP, Helmholtz Center Munich, Munich, Germany
| | - Norbert Hertkorn
- Research Unit Analytical Biogeochemistry, BGC, Helmholtz Center Munich, Munich, Germany
| | | | - Christoph Müller
- Department of Pharmacy, Center for Drug Research, Ludwig-Maximilians University Munich, Munich, Germany
| | - Franz Bracher
- Department of Pharmacy, Center for Drug Research, Ludwig-Maximilians University Munich, Munich, Germany
| | - Juliane Merl-Pham
- Research Unit Protein Science and Metabolomics and Proteomics Core, Helmholtz Center Munich, Munich, Germany
| | - Stefanie M Hauck
- Research Unit Protein Science and Metabolomics and Proteomics Core, Helmholtz Center Munich, Munich, Germany
| | - Michael Schloter
- Research Unit for Comparative Microbiome Analysis, Helmholtz Center Munich, Munich, Germany; ZIEL-Institute for Food & Health, Technical University of Munich, Freising, Germany
| | - Ashley N Michael
- Asthma and Airway Disease Research Center, The University of Arizona, Tucson, Ariz
| | - Dayna Anderson
- Asthma and Airway Disease Research Center, The University of Arizona, Tucson, Ariz
| | - Linnea Honeker
- Asthma and Airway Disease Research Center, The University of Arizona, Tucson, Ariz; Biosphere2, The University of Arizona, Tucson, Ariz
| | - Justyna Gozdz
- Asthma and Airway Disease Research Center, The University of Arizona, Tucson, Ariz
| | - Oksana Pivniouk
- Asthma and Airway Disease Research Center, The University of Arizona, Tucson, Ariz
| | - Carole Ober
- Department of Human Genetics, University of Chicago, Chicago, Ill
| | | | - Fernando D Martinez
- Asthma and Airway Disease Research Center, The University of Arizona, Tucson, Ariz
| | - Shane A Snyder
- Department of Chemical & Environmental Engineering, The University of Arizona, Tucson, Ariz; The BIO5 Institute, The University of Arizona, Tucson, Ariz.
| | - Erika von Mutius
- Institute for Asthma and Allergy Prevention, IAP, Helmholtz Center Munich, Munich, Germany; Department of Pediatrics, Dr. von Hauner Children's Hospital, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany; Comprehensive Pneumology Center-Munich (CPC-M), German Center for Lung Research (DZL), Munich, Germany.
| | - Donata Vercelli
- Department of Cellular and Molecular Medicine, The University of Arizona, Tucson, Ariz; Asthma and Airway Disease Research Center, The University of Arizona, Tucson, Ariz; The BIO5 Institute, The University of Arizona, Tucson, Ariz; Arizona Center for the Biology of Complex Diseases, The University of Arizona, Tucson, Ariz.
| |
Collapse
|
2
|
Solution behavior of native and denatured beta lactoglobulin in presence of pyridinium based ionic liquids: A biophysical perspective of folding and refolding pattern of the protein. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
3
|
Interaction between Fish Skin Gelatin and Pea Protein at Air-Water Interface after Ultrasound Treatment. Foods 2022; 11:foods11050659. [PMID: 35267292 PMCID: PMC8909765 DOI: 10.3390/foods11050659] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 02/07/2022] [Accepted: 02/14/2022] [Indexed: 12/10/2022] Open
Abstract
The interaction between fish skin gelatin (FG) and pea protein isolate (PPI) was investigated at the air-water interface (A-W) before and after a high intensity (275 W, 5 min) ultrasound treatment (US). We analyzed the properties of the single protein suspensions as well as an equal ratio of FG:PPI (MIX), in terms of ζ-potential, particle size, molecular weight, bulk viscosity and interfacial tension. The foaming properties were then evaluated by visual analysis and by Turbiscan Tower. Confocal laser scanning microscopy (CLSM) was employed to explore the role of the proteins on the microstructure of foams. The results showed that the ultrasound treatment slightly influenced physicochemical properties of the proteins, while in general, did not significantly affect their behavior both in bulk and at the air-water interface. In particular, PPI aggregate size was reduced (−48 nm) while their negative charges were increased (−1 mV) after the treatment. However, when the proteins were combined, higher molecular weight of aggregates, higher foam stability values (+14%) and lower interfacial tension (IFT) values (47.2 ± 0.2 mN/m) were obtained, leading us to assume that a weak interaction was developed between them.
Collapse
|
4
|
High voltage electrical treatments can eco-efficiently promote the production of high added value peptides during chymotryptic hydrolysis of β-lactoglobulin. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.101610] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
5
|
Sun Y, Yu X, Hussain M, Li X, Liu L, Liu Y, Ma S, Kouame KJEP, Li C, Leng Y, Jiang S. Influence of milk fat globule membrane and milk protein concentrate treated by ultrasound on the structural and emulsifying stability of mimicking human fat emulsions. ULTRASONICS SONOCHEMISTRY 2022; 82:105881. [PMID: 34942471 PMCID: PMC8799607 DOI: 10.1016/j.ultsonch.2021.105881] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/13/2021] [Accepted: 12/15/2021] [Indexed: 06/06/2023]
Abstract
The primary objective of the present study was to investigate the effectiveness of ultrasonic treatment time on the particle size, molecular weight, microstructure and solubility of milk fat globule membrane (rich in phospholipid, MPL) and milk protein concentrate (MPC). The mimicking human fat emulsions were prepared using modified proteins and compound vegetable oil and the structural, emulsifying properties and encapsulation efficiency of emulsions were evaluated. After ultrasonic treatment, the cavitation caused particle size decreased and structure change of both MPL and MPC, resulting in the enhancement of protein solubility. While, there was no significant change in molecular weight. Modified proteins by ultrasonic may cause a reduction in particle size and an improvement in emulsifying stability and encapsulation efficiency of emulsions. The optimal ultrasonic time to improve functional properties of MPL emulsion and MPC emulsion were 3 min and 6 min, respectively. The emulsifying stability of MPL emulsion was superior to MPC emulsion, which indicated that MPL is more suitable as membrane material to simulate human fat. Therefore, the obtained results can provide basis for quality control of infant formula.
Collapse
Affiliation(s)
- Yue Sun
- Food College, Northeast Agricultural University, No.600 Changjiang St., Xiangfang Dist, 150030 Harbin, China; Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, No. 600 Changjiang St., Xiangfang Dist, 150030 Harbin, China
| | - Xiaoxue Yu
- Food College, Northeast Agricultural University, No.600 Changjiang St., Xiangfang Dist, 150030 Harbin, China; Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, No. 600 Changjiang St., Xiangfang Dist, 150030 Harbin, China
| | - Muhammad Hussain
- Food College, Northeast Agricultural University, No.600 Changjiang St., Xiangfang Dist, 150030 Harbin, China; Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, No. 600 Changjiang St., Xiangfang Dist, 150030 Harbin, China
| | - Xiaodong Li
- Food College, Northeast Agricultural University, No.600 Changjiang St., Xiangfang Dist, 150030 Harbin, China; Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, No. 600 Changjiang St., Xiangfang Dist, 150030 Harbin, China.
| | - Lu Liu
- Food College, Northeast Agricultural University, No.600 Changjiang St., Xiangfang Dist, 150030 Harbin, China; Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, No. 600 Changjiang St., Xiangfang Dist, 150030 Harbin, China.
| | - Yibo Liu
- Food College, Northeast Agricultural University, No.600 Changjiang St., Xiangfang Dist, 150030 Harbin, China; Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, No. 600 Changjiang St., Xiangfang Dist, 150030 Harbin, China
| | - Shuaiyi Ma
- Food College, Northeast Agricultural University, No.600 Changjiang St., Xiangfang Dist, 150030 Harbin, China; Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, No. 600 Changjiang St., Xiangfang Dist, 150030 Harbin, China
| | - Kouadio Jean Eric-Parfait Kouame
- Food College, Northeast Agricultural University, No.600 Changjiang St., Xiangfang Dist, 150030 Harbin, China; Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, No. 600 Changjiang St., Xiangfang Dist, 150030 Harbin, China
| | - Chunmei Li
- Heilongjiang Institute of Green Food Science, 150028 Harbin, China
| | - Youbin Leng
- Heilongjiang Feihe Dairy Co., Ltd., 100015 Beijing, China
| | - Shilong Jiang
- Heilongjiang Feihe Dairy Co., Ltd., 100015 Beijing, China
| |
Collapse
|
6
|
Interactions of β-Lactoglobulin with Bovine Submaxillary Mucin vs. Porcine Gastric Mucin: The Role of Hydrophobic and Hydrophilic Residues as Studied by Fluorescence Spectroscopy. Molecules 2021; 26:molecules26226799. [PMID: 34833889 PMCID: PMC8623809 DOI: 10.3390/molecules26226799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/02/2021] [Accepted: 11/08/2021] [Indexed: 11/17/2022] Open
Abstract
The aim of this study was to investigate binding interactions between β-lactoglobulin (BLG) and two different mucins, bovine submaxillary mucins (BSM) and porcine gastric mucin (PGM), using intrinsic and extrinsic fluorescence spectroscopies. Intrinsic fluorescence spectra showed an enhanced decrease of fluorescence intensity of BLG at all pH conditions when BLG was mixed with PGM rather than with BSM. We propose that, unlike BSM, the tertiary structure of PGM changes and the hydrophobic regions are exposed at pH 3 due to protonation of negatively charged residues. Results suggest that PGM also facilitated the structural unfolding of BLG and its binding with PGM by a hydrophobic interaction, especially at acidic pH, which was further supported by extrinsic fluorescence spectroscopy. Hydrophobic interaction is suggested as the dominant interaction mechanism between BLG and PGM at pH 3, whereas electrostatic interaction is the dominant one between BLG and BSM.
Collapse
|
7
|
Sawyer L. β-Lactoglobulin and Glycodelin: Two Sides of the Same Coin? Front Physiol 2021; 12:678080. [PMID: 34093238 PMCID: PMC8173191 DOI: 10.3389/fphys.2021.678080] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 04/14/2021] [Indexed: 12/22/2022] Open
Abstract
The two lipocalins, β-lactoglobulin (βLg) and glycodelin (Gd), are possibly the most closely related members of the large and widely distributed lipocalin family, yet their functions appear to be substantially different. Indeed, the function of β-lactoglobulin, a major component of ruminant milk, is still unclear although neonatal nutrition is clearly important. On the other hand, glycodelin has several specific functions in reproduction conferred through distinct, tissue specific glycosylation of the polypeptide backbone. It is also associated with some cancer outcomes. The glycodelin gene, PAEP, reflecting one of its names, progestagen-associated endometrial protein, is expressed in many though not all primates, but the name has now also been adopted for the β-lactoglobulin gene (HGNC, www.genenames.org). After a general overview of the two proteins in the context of the lipocalin family, this review considers the properties of each in the light of their physiological functional significance, supplementing earlier reviews to include studies from the past decade. While the biological function of glycodelin is reasonably well defined, that of β-lactoglobulin remains elusive.
Collapse
Affiliation(s)
- Lindsay Sawyer
- School of Biological Sciences, IQB3, The University of Edinburgh, Edinburgh, United Kingdom
| |
Collapse
|
8
|
Emerging applications of site-directed spin labeling electron paramagnetic resonance (SDSL-EPR) to study food protein structure, dynamics, and interaction. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2021.01.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
9
|
Lux J, Heyn TR, Kampen I, Schwarz K, Keppler JK, Steffen-Heins A. Amyloid aggregation of spin-labeled β-lactoglobulin. Part I: Influence of spin labeling on amyloid aggregation. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
10
|
Energetic and structural effects of the Tanford transition on ligand recognition of bovine β-lactoglobulin. Arch Biochem Biophys 2021; 699:108750. [PMID: 33421379 DOI: 10.1016/j.abb.2020.108750] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 12/28/2020] [Accepted: 12/30/2020] [Indexed: 01/14/2023]
Abstract
Bovine β-lactoglobulin, an abundant protein in whey, is a promising nanocarrier for peroral administration of drug-like hydrophobic molecules, a process that involves transit through the different acidic conditions of the human digestive tract. Among the several pH-induced conformational rearrangements that this lipocalin undergoes, the Tanford transition is particularly relevant. This transition, which occurs with a midpoint around neutral pH, involves a conformational change of the E-F loop that regulates accessibility to the primary binding site. The effect of this transition on the ligand binding properties of this protein has scarcely been explored. In this study, we carried out an energetic and structural characterization of β-lactoglobulin molecular recognition at pH values above and below the zone in which the Tanford transition occurs. The combined analysis of crystallographic, calorimetric, and molecular dynamics data sheds new light on the interplay between self-association, ligand binding, and the Tanford pre- and post-transition conformational states, revealing novel aspects underlying the molecular recognition mechanism of this enigmatic lipocalin.
Collapse
|
11
|
Yu Y, Zhang H, Zhu J, Liu J, Zhang T. Effect of ultrasound-irradiation combined pretreatment on the foamability of liquid egg white. J Food Sci 2020; 85:4312-4318. [PMID: 33190246 DOI: 10.1111/1750-3841.15530] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 10/12/2020] [Accepted: 10/13/2020] [Indexed: 11/29/2022]
Abstract
This study aims to optimize the ultrasound-irradiation combined pretreatment conditions to enhance the liquid egg white (LEW) foamability and investigate the changing mechanism about the physical and structural properties of LEW during the processing. Results indicated that the foamability of the LEW was increased by ultrasound-irradiation combined pretreatment to the highest value of 92.6% (irradiation dose = 33 kGy, ultrasound time = 6 min, and ultrasound power = 300 W). Three significant proteins in LEW (ovalbumin, ovotransferrin, and lysozyme) were chosen to explore the change law on their physical and structural properties. Results indicated that ultrasound-irradiation combined pretreatment increased the solubility and reduced the pH and particle size of ovalbumin and lysozyme, thus enhancing the foamability of LEW. Furthermore, the fluorescence spectra changes implied the un-folding and destruction of ovalbumin, ovotransferrin, and lysozyme during the ultrasound-irradiation combined pretreatment. Moreover, circular dichroism spectroscopy analysis revealed that the pretreatment decreased α-helix and β-sheet of the ovalbumin, ovotransferrin, and lysozyme, which bring out the improvement of LEW foamability. The present study indicated that ultrasound-irradiation combined pretreatment had the potential to be implemented to enhance the foamability of LEW.
Collapse
Affiliation(s)
- Yali Yu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun, P. R. China.,College of Food Science and Engineering Jilin University, Changchun, P. R. China
| | - Hui Zhang
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun, P. R. China.,College of Food Science and Engineering Jilin University, Changchun, P. R. China
| | - Jing Zhu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun, P. R. China.,College of Food Science and Engineering Jilin University, Changchun, P. R. China
| | - Jingbo Liu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun, P. R. China.,College of Food Science and Engineering Jilin University, Changchun, P. R. China
| | - Ting Zhang
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun, P. R. China.,College of Food Science and Engineering Jilin University, Changchun, P. R. China
| |
Collapse
|
12
|
Du PC, Tu ZC, Wang H, Hu YM. Mechanism of Selenium Nanoparticles Inhibiting Advanced Glycation End Products. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:10586-10595. [PMID: 32866004 DOI: 10.1021/acs.jafc.0c03229] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Selenium nanoparticles (SeNPs) have been applied in fields of nanobiosensors, environment, nanomedicine, etc. as a result of their excellent characteristics. Early studies had shown that SeNPs have certain inhibition ability against glycation, but the inhibition mechanism, especially for the influence of SeNPs on the reaction activity of glycation sites, remains unclear. The aim of the presented research was to reveal the effects of SeNPs on the β-lactoglobulin (β-Lg)/d-ribose glycation system at the molecular level and explore the possible inhibitory mechanism of SeNPs on the formation of advanced glycation end products (AGEs) by analyzing the glycation sites via high-performance liquid chromatography (HPLC)-Orbitrap-tandem mass spectrometry (MS/MS). Changes in contents of AGE formation and free amino acid contents had indicated that SeNPs could significantly slow the glycation process, thus attenuating the formation of AGEs. HPLC-Orbitrap-MS/MS analysis revealed that, at 6, 12, and 24 h, the number of glycation sites of glycated β-Lg decreased from 7, 7, and 9 to 5, 5, and 6 after the intervention of SeNPs, respectively. The glycation extent of each glycation site was controlled, and the dual-glycation ability of K8, K14, K47, K91, and K101 was changed. All of these results confirmed that SeNPs could indeed slow the process of protein glycation at the molecular level. This may be the reason for SeNPs reducing the formation of AGEs during glycation. Therefore, this study shed light on the insight of how SeNPs reduce the formation of AGEs.
Collapse
Affiliation(s)
- Peng-Cheng Du
- State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi 330047, People's Republic of China
| | - Zong-Cai Tu
- State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi 330047, People's Republic of China
- National R&D Center of Freshwater Fish Processing and Engineering Research Center of Freshwater Fish High-Value Utilization of Jiangxi Province, Jiangxi Normal University, Nanchang, Jiangxi 330022, People's Republic of China
| | - Hui Wang
- State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi 330047, People's Republic of China
| | - Yue-Ming Hu
- State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang, Jiangxi 330047, People's Republic of China
| |
Collapse
|
13
|
Du PC, Tu ZC, Wang H, Hu YM, Zhang JJ, Zhong BZ. Investigation of the effect of oxidation on the structure of β-lactoglobulin by high resolution mass spectrometry. Food Chem 2020; 339:127939. [PMID: 33152852 DOI: 10.1016/j.foodchem.2020.127939] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 07/24/2020] [Accepted: 08/23/2020] [Indexed: 12/19/2022]
Abstract
In this work, high-resolution mass spectrometry was used to identify the oxidation sites and forms of β-lactoglobulin (β-Lg) induced by hydrogen peroxide with 1.5% concentration, and the influence of oxidation sites on the structure of β-Lg was discussed from the molecular level. Twelve kinds of oxidation products and 36 oxidation sites were identified, including sulfoxidation in sulfur-containing amino acid residue, hydroxylation in aromatic group residue, deamination in amino-containing amino acid etc. The destruction of hydrogen bonds and disulfide bonds in β-Lg caused by oxidation is the main factor causing its structural changes, which were manifested in the decrease of β-sheet component and increase of β-turns and random coil contents, intrinsic fluorescence intensity and surface hydrophobicity. In addition, several peptides as potential oxidative markers were found to be capable of monitoring the degree of oxidation of β-Lg. In short, this work provided insights into structural changes of β-Lg by oxidation.
Collapse
Affiliation(s)
- Peng-Cheng Du
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Zong-Cai Tu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China; National R&D Center of Freshwater Fish Processing, Jiangxi Normal University, Nanchang 330022, China; Engineering Research Center of Freshwater Fish High-value Utilization of Jiangxi Province, Jiangxi Normal University, Nanchang 330022, China.
| | - Hui Wang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China.
| | - Yue-Ming Hu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Jing-Jing Zhang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Bi-Zhen Zhong
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China
| |
Collapse
|
14
|
Varlamova EG, Zaripov OG. Beta-lactoglobulin-nutrition allergen and nanotransporter of different nature ligands therapy with therapeutic action. Res Vet Sci 2020; 133:17-25. [PMID: 32919234 DOI: 10.1016/j.rvsc.2020.08.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 08/08/2020] [Accepted: 08/28/2020] [Indexed: 02/06/2023]
Abstract
β-lactoglobulin is one of the nutrition allergens present in the milk of many mammals, with the exception of human. This protein belongs to the family of lipocalins, consisting of nine antiparallel β-strands (β-A to β-I) and one α-helix. This structure allows it to serve as a nanotransporter of various nature ligands in a pH dependent manner, which allows us to confidently consider it as a reliable carrier of drugs directly into the intestine, bypassing the destructive acidic environment of the stomach. Based on the latest data, this review describes the currently known methods of reducing the allergenicity of beta-lactoglobulin, as well as the mechanisms and methods of forming complexes of this protein with ligands, which emphasizes its importance and versatility and explains the growing interest in studying its properties in recent decades, and also opens up prospects for its practical application in medicine and pharmaceuticals.
Collapse
Affiliation(s)
- E G Varlamova
- Federal State Institution of Science Institute of Cell Biophysics, Russian Academy of Sciences, Institutskaya st. 3, 142290, Pushchino, Moscow Region, Russia.
| | - O G Zaripov
- Federal Science Center for Animal Husbandry named after Academy Member L.K. Ernst, Dubrovitsy village, house 60, 142132, Moscow region, Podolsky city district, Russia
| |
Collapse
|
15
|
Markoska T, Vasiljevic T, Huppertz T. Unravelling Conformational Aspects of Milk Protein Structure-Contributions from Nuclear Magnetic Resonance Studies. Foods 2020; 9:E1128. [PMID: 32824355 PMCID: PMC7466366 DOI: 10.3390/foods9081128] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 08/11/2020] [Accepted: 08/13/2020] [Indexed: 11/30/2022] Open
Abstract
Changes in the molecular structure and association of milk proteins lead to many desirable (under controlled conditions) or undesirable characteristics of dairy products. Several methods have been used to study the structure of milk proteins and changes therein in different environments. Whey proteins are an excellent model for secondary structure studies using circular dichroism (CD), Fourier-transform infrared spectroscopy (FTIR) and tertiary structure studies using X-ray crystallography and nuclear magnetic resonance (NMR). However, caseins, the most abundant protein class in milk, are far more difficult to characterize. The tertiary structure of caseins cannot be observed by X-ray crystallography due to the inability to crystallize caseins. However, NMR is an appropriate approach for structural elucidation. Thus far, NMR was applied on specific peptides of individual caseins of the molecules including phosphoserine centers and colloidal calcium phosphate. The literature focuses on these parts of the molecule due to its importance in building the sub-unit particles involving individual caseins and calcium phosphate nanoclusters. This review focuses on present structural studies of milk proteins using NMR and their importance in dairy processing.
Collapse
Affiliation(s)
- Tatijana Markoska
- Advanced Food Systems Research Unit, Institute for Sustainable Industries and Liveable Cities, College of Health and Biomedicine, Victoria University, Melbourne VIC 8001, Australia; (T.M.); (T.V.)
| | - Todor Vasiljevic
- Advanced Food Systems Research Unit, Institute for Sustainable Industries and Liveable Cities, College of Health and Biomedicine, Victoria University, Melbourne VIC 8001, Australia; (T.M.); (T.V.)
| | - Thom Huppertz
- Advanced Food Systems Research Unit, Institute for Sustainable Industries and Liveable Cities, College of Health and Biomedicine, Victoria University, Melbourne VIC 8001, Australia; (T.M.); (T.V.)
- FrieslandCampina, 3818 LE Amersfoort, The Netherlands
- Food Quality and Design Group, Wageningen University and Research, 6808 WG Wageningen, The Netherlands
| |
Collapse
|
16
|
Cortes-Hernandez P, Vázquez Nuñez R, Domínguez-Ramírez L. Docking and Molecular Dynamics Predictions of Pesticide Binding to the Calyx of Bovine β-Lactoglobulin. Int J Mol Sci 2020; 21:ijms21061988. [PMID: 32183317 PMCID: PMC7139891 DOI: 10.3390/ijms21061988] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 03/01/2020] [Accepted: 03/02/2020] [Indexed: 11/16/2022] Open
Abstract
Pesticides are used extensively in agriculture, and their residues in food must be monitored to prevent toxicity. The most abundant protein in cow’s milk, β-lactoglobulin (BLG), shows high affinity for diverse hydrophobic ligands in its central binding pocket, called the calyx. Several of the most frequently used pesticides are hydrophobic. To predict if BLG may be an unintended carrier for pesticides, we tested its ability to bind 555 pesticides and their isomers, for a total of 889 compounds, in a rigid docking screen. We focused on the analysis of 60 unique molecules belonging to the five pesticide classes defined by the World Health Organization, that docked into BLG’s calyx with ΔGs ranging from −8.2 to −12 kcal mol−1, chosen by statistical criteria. These “potential ligands” were further analyzed using molecular dynamic simulations, and the binding energies were explored with Molecular Mechanics/Generalized Born/Surface Area (MMGBSA). Hydrophobic pyrethroid insecticides, like cypermethrin, were found to bind as deeply and tightly into the calyx as BLG’s natural ligand, palmitate; while polar compounds, like paraquat, were expelled. Our results suggest that BLG could be a carrier for pesticides, in particular for pyrethroid insecticides, allowing for their accumulation in cow’s milk beyond their solubility restrictions. This analysis opens possibilities for pesticide biosensor design based on BLG.
Collapse
Affiliation(s)
- Paulina Cortes-Hernandez
- Instituto Mexicano del Seguro Social (IMSS), Centro de Investigación Biomédica de Oriente (CIBIOR), Cellular Biology Laboratory, 74360 Metepec, Puebla, Mexico;
| | - Roberto Vázquez Nuñez
- Department of Fundamental Microbiology, University of Lausanne, CH-1015 Lausanne, Switzerland;
| | - Lenin Domínguez-Ramírez
- Department of Chemical and Biological Sciences, School of Sciences, Universidad de las Américas Puebla, Santa Catarina Mártir Cholula, 72810 San Andrés Cholula, Puebla, Mexico
- Correspondence:
| |
Collapse
|
17
|
Gholami H, Divsalar A, Abbasalipourkabir R, Ziamajidi N, Saeidifar M. The simultaneous carrier ability of natural antioxidant of astaxanthin and chemotherapeutic drug of 5-fluorouracil by whey protein of β-lactoglobulin: spectroscopic and molecular docking study. J Biomol Struct Dyn 2020; 39:1004-1016. [DOI: 10.1080/07391102.2020.1733091] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Hamid Gholami
- Department of Biochemistry, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Adeleh Divsalar
- Department of Cell & Molecular Sciences, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran
| | | | - Nasrin Ziamajidi
- Department of Biochemistry, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Maryam Saeidifar
- Nanotechnology and Advanced Materials Department, Materials and Energy Research Center, Karaj, Iran
| |
Collapse
|
18
|
Singh R, Meena NK, Das T, Sharma RD, Prakash A, Lynn AM. Delineating the conformational dynamics of intermediate structures on the unfolding pathway of β-lactoglobulin in aqueous urea and dimethyl sulfoxide. J Biomol Struct Dyn 2019; 38:5027-5036. [PMID: 31744390 DOI: 10.1080/07391102.2019.1695669] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The funnel shaped energy landscape model of the protein folding suggests that progression of folding proceeds through multiple pathways, having the multiple intermediates which leads to multidimensional free-energy surface. Herein, we applied all-atom MD simulation to conduct a comparative study on the structure of β-lactoglobulin (β-LgA) in aqueous mixture of 8 M urea and 8 M dimethyl sulfoxide (DMSO), at different temperatures. The cumulative results of multiple simulations suggest a common unfolding pathway of β-LgA, occurred through the stable and meta-stable intermediates (I), in both urea and DMSO. However, the free-energy landscape (FEL) analyses show that the structural transitions of I-states are energetically different. In urea, FEL shows distinct ensemble of intermediates, I1 and I2, separated by the energy barrier of ∼3.0 kcal mol-1. Similarly, we find the population of two distinct I1 and I2 states in DMSO, however, the I1 appeared transiently around ∼30-35 ns and is short-lived. But, the I2 ensemble is observed structurally compact and long-lived (∼50-150 ns) as compared to unfolding in urea. Furthermore, the I1 and I2 are separated through a high energy barrier of ∼6.0 kcal mol-1. Thus, our results provide the structural insights of intermediates which essentially bear the signature of a different unfolding pathway of β-LgA in urea and DMSO.Abbreviationsβ-LgAβ-lactoglobulinDMSOdimethyl sulfoxideFELfree-energy landscapeGdmClguanidinium chlorideIintermediate stateMGmolten globule statePMEparticle mesh EwaldQfraction of native contactsRMSDroot mean square deviationRMSFroot mean square fluctuationRgradius of gyrationSASAsolvent Accessible Surface AreascSASAthe side chain SASATrptryptophanCommunicated by Ramaswamy H. Sarma.
Collapse
Affiliation(s)
- Ruhar Singh
- School of Computational & Integrative Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Naveen Kumar Meena
- School of Computational & Integrative Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Trishala Das
- School of Computational & Integrative Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Ravi Datta Sharma
- Amity Institute of Integrative Sciences and Health, Amity University, Haryana, India
| | - Amresh Prakash
- Amity Institute of Integrative Sciences and Health, Amity University, Haryana, India
| | - Andrew M Lynn
- School of Computational & Integrative Sciences, Jawaharlal Nehru University, New Delhi, India
| |
Collapse
|
19
|
Iwaoka M, Mitsuji T, Shinozaki R. Oxidative folding pathways of bovine milk β-lactoglobulin with odd cysteine residues. FEBS Open Bio 2019; 9:1379-1391. [PMID: 31087497 PMCID: PMC6668375 DOI: 10.1002/2211-5463.12656] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 05/13/2019] [Indexed: 01/06/2023] Open
Abstract
Bovine β‐lactoglobulin (BLG) is a major whey protein with unique structural characteristics: it possesses a free Cys thiol (SH) and two disulfide (SS) bonds and consists of a β‐barrel core surrounded by one long and several short α helices. Although SS‐intact conformational folding has been studied in depth, the oxidative folding pathways and accompanying SS formation/rearrangement are poorly understood. In this study, we used trans‐3,4‐dihydroxyselenolane oxide, a water‐soluble selenoxide reagent which undergoes rapid and quantitative SS formation, to determine the oxidative folding pathways of BLG variant A (BLGA) at pH 8.0 and 25 °C. This was done by characterizing two key one‐SS intermediates, a particular folding intermediate having a Cys66–Cys160 SS bond (I‐1) and a particular folding intermediate having a Cys106–Cys119 SS bond (I‐2), which have a native Cys66–Cys160 and Cys106–Cys119 SS bond, respectively. In the major folding pathway, the reduced protein (R) with abundant α helices was oxidized to I‐1, which was then transformed to I‐2 through SS rearrangement. The native protein (N) was formed by oxidation of I‐2. The redundant Cys121 thiol facilitates SS rearrangement. N is also generated from an ensemble of folding intermediates having two SS bonds (2SS) intermediates with scrambled SS bonds through SS rearrangement, but this minor pathway is deteriorative due to aggregation or overoxidation of 2SS. During oxidative folding of BLGA, α→β conformational transition occurred as previously observed in SS‐intact folding. These findings are informative not only for elucidating oxidative folding pathways of other members of the β‐lactoglobulin family, but also for understanding the roles of a redundant Cys thiol in the oxidative folding process of a protein with odd Cys residues.
Collapse
Affiliation(s)
- Michio Iwaoka
- Department of Chemistry, School of Science, Tokai University, Hiratsuka-shi, Kanagawa, Japan
| | - Takumi Mitsuji
- Department of Chemistry, School of Science, Tokai University, Hiratsuka-shi, Kanagawa, Japan
| | - Reina Shinozaki
- Department of Chemistry, School of Science, Tokai University, Hiratsuka-shi, Kanagawa, Japan
| |
Collapse
|
20
|
Qi PX, Chau HK, Hotchkiss AT. Molecular characterization of interacting complexes and conjugates induced by the dry-state heating of β-lactoglobulin and sugar beet pectin. Food Hydrocoll 2019. [DOI: 10.1016/j.foodhyd.2019.01.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
21
|
Stender EG, Birch J, Kjeldsen C, Nielsen LD, Duus JØ, Kragelund BB, Svensson B. Alginate Trisaccharide Binding Sites on the Surface of β-Lactoglobulin Identified by NMR Spectroscopy: Implications for Molecular Network Formation. ACS OMEGA 2019; 4:6165-6174. [PMID: 31459761 PMCID: PMC6647953 DOI: 10.1021/acsomega.8b03532] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 03/21/2019] [Indexed: 05/08/2023]
Abstract
β-lactoglobulin (BLG) is a promiscuous protein in terms of ligand interactions, having several binding sites reported for hydrophobic biomolecules such as fatty acids, lipids, and vitamins as well as detergents. BLG also interacts with neutral and anionic oligo- and polysaccharides for which the binding sites remain to be identified. The multivalency offered by these carbohydrate ligands is expected to facilitate coacervation, an electrostatically driven liquid-liquid phase separation. Using heteronuclear single quantum coherence NMR spectroscopy and monitoring chemical shift perturbations, we observed specific binding sites of modest affinity for alginate oligosaccharides (AOSs) prepared by alginate lyase degradation. Two different AOS binding sites (site 1 and site 2) centered around K75 and K101 were identified for monomeric BLG isoform A (BLGA) at pH 2.65. In contrast, only site 1 around K75 was observed for dimeric BLGA at pH 4.0. The data suggest a pH-dependent mechanism whereby both the BLGA dimer-monomer equilibrium and electrostatic interactions are exploited. This variability allows for control of coacervation and particle formation of BLGA/alginate mixtures via directed polysaccharide bridging of AOS binding sites and has implication for molecular network formation. The results are valuable for design of polyelectrolyte-based BLG particles and coacervates for carrying nutraceuticals and modulating viscosity in dairy products by use of alginates.
Collapse
Affiliation(s)
- Emil G.
P. Stender
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building
224, DK-2800 Kgs. Lyngby, Denmark
| | - Johnny Birch
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building
224, DK-2800 Kgs. Lyngby, Denmark
| | - Christian Kjeldsen
- Department
of Chemistry, Technical University of Denmark, Kemitorvet, Building
207, DK-2800 Kgs. Lyngby, Denmark
| | - Lau D. Nielsen
- Structural
Biology and NMR Laboratory, Linderstrøm-Lang Centre for Protein
Science, Department of Biology, University
of Copenhagen, Ole Maaløes
Vej 5, DK-2200 Copenhagen
N, Denmark
| | - Jens Ø. Duus
- Department
of Chemistry, Technical University of Denmark, Kemitorvet, Building
207, DK-2800 Kgs. Lyngby, Denmark
| | - Birthe B. Kragelund
- Structural
Biology and NMR Laboratory, Linderstrøm-Lang Centre for Protein
Science, Department of Biology, University
of Copenhagen, Ole Maaløes
Vej 5, DK-2200 Copenhagen
N, Denmark
- E-mail: . phone: +45 3532 2081 (B.S.)
| | - Birte Svensson
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building
224, DK-2800 Kgs. Lyngby, Denmark
- E-mail: . phone: +45 4525 2740 (B.B.K.)
| |
Collapse
|
22
|
Pandey P, Meena NK, Prakash A, Kumar V, Lynn AM, Ahmad F. Characterization of heterogeneous intermediate ensembles on the guanidinium chloride-induced unfolding pathway of β-lactoglobulin. J Biomol Struct Dyn 2019; 38:1042-1053. [PMID: 30880641 DOI: 10.1080/07391102.2019.1593245] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Folding pathway of β-LgA (β-lactoglobulin) evolves through the conformational α→β transition. The α→β transition is a molecular hallmark of various neurodegenerative diseases. Thus, β-LgA may serve as a good model for understanding molecular mechanism of protein aggregation involved in neurodegenerative diseases. Here, we studied the conformational dynamics of β-LgA in 6 M GdmCl at different temperatures using MD simulations. Structural order parameters such as RMSD, Rg, SASA, native contacts (Q), hydrophobic distal-matrix and free-energy landscape (FEL) were used to investigate the conformational transitions. Our results show that GdmCl destabilizes secondary and tertiary structure of β-LgA by weakening the hydrophobic interactions and hydrogen bond network. Multidimensional FEL shows the presence of different unfolding intermediates at 400 K. I1 is long-lived intermediate which has mostly intact native secondary structure, but loose tertiary structure. I2 is structurally compact intermediate formed after the partial loss of secondary structure. The transiently and infrequently buried evolution of W19 shows that intermediate conformational ensembles are structurally heterogeneous. We observed that the intermediate conformations are largely stabilized by non-native H-bonds. The outcome of this work provides the molecular details of intermediates trapped due to non-native interactions that may be regarded as pathogenic conformations involved in neurodegenerative diseases.Communicated by Ramaswamy H. Sarma.
Collapse
Affiliation(s)
- Preeti Pandey
- School of Computational & Integrative Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Naveen Kumar Meena
- School of Computational & Integrative Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Amresh Prakash
- School of Computational & Integrative Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Vijay Kumar
- Amity Institute of Neuropsychology & Neurosciences, Amity University, Noida, India
| | - Andrew M Lynn
- School of Computational & Integrative Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Faizan Ahmad
- Jamia Millia Islamia, Centre for Interdisciplinary Research in Basic Sciences, New Delhi, India
| |
Collapse
|
23
|
Oehlke K, Keppler JK, Milsmann J, Mayer-Miebach E, Greiner R, Steffen-Heins A. Adsorption of β-lactoglobulin to solid lipid nanoparticles (SLN) depends on encapsulated compounds. J FOOD ENG 2019. [DOI: 10.1016/j.jfoodeng.2018.12.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
24
|
Rodrigues RM, Vicente AA, Petersen SB, Pereira RN. Electric field effects on β-lactoglobulin thermal unfolding as a function of pH – Impact on protein functionality. INNOV FOOD SCI EMERG 2019. [DOI: 10.1016/j.ifset.2018.11.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
25
|
Peixoto PDS, Trivelli X, André C, Moreau A, Delaplace G. Formation of β-Lactoglobulin Aggregates from Quite, Unfolded Conformations upon Heat Activation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:446-452. [PMID: 30565468 DOI: 10.1021/acs.langmuir.8b03459] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In presence of calcium ions, β-lactoglobulin (BLG) unfolds and subsequently aggregates after heating. This process has important pharmaceutical and agroalimentary applications. Nowadays, the molecular mechanism of unfolding and BLG aggregation, and the role of calcium in the mechanism, is poorly understood. Actually, in most studies, data have been acquired at room temperature, after heating and after aggregation, which makes it difficult to establish a clear causal-temporal relation between calcium binding, heat, and aggregation. Thus, the goal of the present study is to get accurate, nanoscale data about the molecular events leading to BLG unfolding and calcium-dependent aggregation. The molecular transformation of BLG during heating has been investigated, using the NMR pulse field gradient technique, operating in a high field (900 MHz). Thanks to this technique, the molecular conformation of newly formed unfolded BLG molecules can be distinguished in a large pool of native ones. The present work shows that BLG at neutral pH at 65 °C displays fast, cooperative-like unfolding, in which no long-lived intermediary state (as a molten globule one) is detected, before aggregation. These data also indicate that calcium ions bind unfolded BLG in specific sites which might be a necessary feature to form the aggregate. Finally, these data also provide an NMR-based methodology to monitor the rate of protein unfolding using NMR.
Collapse
Affiliation(s)
- Paulo D S Peixoto
- Univ. Lille, UMR 8207-UMET-Unité Matériaux et Transformations , 59000 Lille , France
- INRA , 59000 Lille , France
| | - Xavier Trivelli
- Université de Lille, CNRS, UMR 8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle , 59655 Lille , France
| | - Christophe André
- Univ. Lille, UMR 8207-UMET-Unité Matériaux et Transformations , 59000 Lille , France
- INRA , 59000 Lille , France
- UC Lille, HEI, Laboratoire de Génie des Procédés , 59046 Lille , France
| | | | | |
Collapse
|
26
|
Çelebioğlu HY, Lee S, Chronakis IS. Interactions of salivary mucins and saliva with food proteins: a review. Crit Rev Food Sci Nutr 2019; 60:64-83. [PMID: 30632771 DOI: 10.1080/10408398.2018.1512950] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Mucins are long glycoprotein molecules responsible for the gel nature of the mucous layer that covers epithelial surfaces throughout the body. Mucins, as the major salivary proteins, are also important proteins for the food oral processing and digestion. The interactions of salivary mucins and saliva with several food proteins and food protein emulsions, as well as their functional properties related to the food oral processing were reviewed in this paper. The target food proteins of focus were whey proteins (lactoferrin and beta-lactoglobulin) and non-whey proteins (casein, gelatin, galectin/lectin, and proline-rich proteins). Most of the studies suggest that electrostatic attraction (between positively charged food proteins with negatively charged moieties of mucin mainly on glycosylated region of mucin) is the major mode of interaction between them. On the other hand, casein attracts the salivary proteins only via non-covalent interactions due to its naturally self-assembled micellar structure. Moreover, recent studies related to β-lactoglobulin (BLG)-mucin interactions have clarified the importance of hydrophobic as well as hydrophilic interactions, such as hydrogen bonding. Furthermore, in vitro studies between protein emulsions and saliva observed a strong aggregating effect of saliva on caseinate and whey proteins as well as on surfactant-stabilized emulsions. Besides, the sign and the density of the charge on the surface of the protein emulsion droplets contribute significantly to the behavior of the emulsion when mixed with saliva. Other studies also suggested that the interactions between saliva and whey proteins depends on the pH in addition to the flow rate of the saliva. Overall, the role of interactions of food proteins and food protein emulsions with mucin/saliva-proteins in the oral perception, as well as the physicochemical and structural changes of proteins were discussed.
Collapse
Affiliation(s)
- Hilal Y Çelebioğlu
- Nano-BioScience Research Group, DTU-Food, Technical University of Denmark, Lyngby, Denmark
| | - Seunghwan Lee
- Department of Mechanical Engineering, Technical University of Denmark, Lyngby, Denmark
| | - Ioannis S Chronakis
- Nano-BioScience Research Group, DTU-Food, Technical University of Denmark, Lyngby, Denmark
| |
Collapse
|
27
|
Chen H, Hong Q, Zhong J, Zhou L, Liu W, Luo S, Liu C. The enhancement of gastrointestinal digestibility of β‐LG by dynamic high‐pressure microfluidization to reduce its antigenicity. Int J Food Sci Technol 2018. [DOI: 10.1111/ijfs.14044] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Hao Chen
- State Key laboratory of Food Science and Technology Nanchang University No 235, Nanjing East Road Nanchang Jiangxi 330047 China
| | - Qitong Hong
- State Key laboratory of Food Science and Technology Nanchang University No 235, Nanjing East Road Nanchang Jiangxi 330047 China
| | - Junzhen Zhong
- State Key laboratory of Food Science and Technology Nanchang University No 235, Nanjing East Road Nanchang Jiangxi 330047 China
| | - Lei Zhou
- State Key laboratory of Food Science and Technology Nanchang University No 235, Nanjing East Road Nanchang Jiangxi 330047 China
| | - Wei Liu
- State Key laboratory of Food Science and Technology Nanchang University No 235, Nanjing East Road Nanchang Jiangxi 330047 China
| | - Shunjing Luo
- State Key laboratory of Food Science and Technology Nanchang University No 235, Nanjing East Road Nanchang Jiangxi 330047 China
| | - Chengmei Liu
- State Key laboratory of Food Science and Technology Nanchang University No 235, Nanjing East Road Nanchang Jiangxi 330047 China
| |
Collapse
|
28
|
Sardar S, Anas M, Maity S, Pal S, Parvej H, Begum S, Dalui R, Sepay N, Halder UC. Silver nanoparticle modulates the aggregation of beta-lactoglobulin and induces to form rod-like aggregates. Int J Biol Macromol 2018; 125:596-604. [PMID: 30528992 DOI: 10.1016/j.ijbiomac.2018.12.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 11/23/2018] [Accepted: 12/02/2018] [Indexed: 02/07/2023]
Abstract
Silver nanoparticles (SNPs) have been increasingly used in medicines and biomaterials as a drug carriers and diagnostic or therapeutic material due to their smaller size, large surface area and cell penetration ability. Here we report the preparation of SNPs of diameter 10 ± 3 nm by using silver nitrate and sodium borohydride and the interaction of synthesized SNPs with our model protein β-lactoglobulin (β-lg) in 10 mM phosphate buffer at pH 7.5 after thermal exposure at 75 °C. Heat exposed β-lg forms amyloidal fibrillar aggregates whereas this protein aggregates adopt rod-like shape instead of fibrillar structure in presence of SNP under the same conditions. Size of the synthesized SNPs is confirmed by UV-Visible spectroscopy, SEM and TEM. Interactions and subsequent formation of molecular assembly of heat stressed β-lg with SNP were investigated using Th-T assay and ANS binding assay, DLS, RLS, CD, FT-IR, SEM, TEM. Docking study parallely also support the experimental findings.
Collapse
Affiliation(s)
- Subrata Sardar
- Organic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Md Anas
- Organic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Sanhita Maity
- Organic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Sampa Pal
- Organic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Hasan Parvej
- Organic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Shahnaz Begum
- Organic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Ramkrishna Dalui
- Organic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Nayim Sepay
- 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.
| |
Collapse
|
29
|
Probing the interaction of two chemotherapeutic drugs of oxali-palladium and 5-fluorouracil simultaneously with milk carrier protein of β-lactoglobulin. Int J Biol Macromol 2018; 112:422-432. [DOI: 10.1016/j.ijbiomac.2018.01.067] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Revised: 01/08/2018] [Accepted: 01/11/2018] [Indexed: 02/06/2023]
|
30
|
Park HW, Kim DY, Shin WS. Fucoidan improves the structural integrity and the molecular stability of β-lactoglobulin. Food Sci Biotechnol 2018; 27:1247-1255. [PMID: 30319832 DOI: 10.1007/s10068-018-0375-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Revised: 03/23/2018] [Accepted: 04/03/2018] [Indexed: 10/17/2022] Open
Abstract
β-lactoglobulin (β-lg) was covalently bonded with fucoidan through Maillard reaction at 60 °C for 96 h under 79% RH condition. The molecular characters of the conjugate were investigated using fourier transform infrared spectroscopy (FT-IR), atomic force microscopy (AFM), and circular dichroism (CD) spectroscopy. And, its thermal properties, surface activity, and zeta-potential were compared with intact β-lg, β-lg-fucoidan mixture, and fucoidan under different pH conditions. AFM indicated that the conjugate was nano-structured, regular spherical-shaped and generally large sized compared to β-lg-fucoidan mixture. CD spectra and FT-IR showed that tertiary structure of β-lg slightly unfolded, but little change in secondary structure occurred. This explained that glycation under Maillard condition resulted in a molten globule state of β-lg. Differential scanning calorimetry (DSC) data exhibited that fucoidan shifted the temperature of phase transition and improved thermal stability of β-lg molecule. In addition, the conjugate prominently decreased the surface tension with pH-dependency.
Collapse
Affiliation(s)
- Hyun-Woong Park
- Department of Food and Nutrition, College of Human Ecology, Hanyang University, Seoul, 04763 Republic of Korea
| | - Do-Yeong Kim
- Department of Food and Nutrition, College of Human Ecology, Hanyang University, Seoul, 04763 Republic of Korea
| | - Weon-Sun Shin
- Department of Food and Nutrition, College of Human Ecology, Hanyang University, Seoul, 04763 Republic of Korea
| |
Collapse
|
31
|
Birch J, Harðarson HK, Khan S, Van Calsteren MR, Ipsen R, Garrigues C, Almdal K, Hachem MA, Svensson B. Effect of repeat unit structure and molecular mass of lactic acid bacteria hetero-exopolysaccharides on binding to milk proteins. Carbohydr Polym 2017; 177:406-414. [PMID: 28962786 DOI: 10.1016/j.carbpol.2017.08.055] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 07/03/2017] [Accepted: 08/10/2017] [Indexed: 01/05/2023]
Abstract
Interactions of exopolysaccharides and proteins are of great importance in food science, but complicated to analyze and quantify at the molecular level. A surface plasmon resonance procedure was established to characterize binding of seven structure-determined, branched hetero-exopolysaccharides (HePSs) of 0.14-4.9MDa from lactic acid bacteria to different milk proteins (β-casein, κ-casein, native and heat-treated β-lactoglobulin) at pH 4.0-5.0. Maximum binding capacity (RUmax) and apparent affinity (KA,app) were HePS- and protein-dependent and varied for example 10- and 600-fold, respectively, in the complexation with native β-lactoglobulin at pH 4.0. Highest RUmax and KA,app were obtained with heat-treated β-lactoglobulin and β-casein, respectively. Overall, RUmax and KA,app decreased 6- and 20-fold, respectively, with increasing pH from 4.0 to 5.0. KA,app was influenced by ionic strength and temperature, indicating that polar interactions stabilize HePS-protein complexes. HePS size as well as oligosaccharide repeat structure, conferring chain flexibility and hydrogen bonding potential, influence the KA,app.
Collapse
Affiliation(s)
- Johnny Birch
- Enzyme and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Elektrovej, building 375, DK-2800 Kgs. Lyngby, Denmark.
| | - Hörður Kári Harðarson
- Enzyme and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Elektrovej, building 375, DK-2800 Kgs. Lyngby, Denmark.
| | - Sanaullah Khan
- Department of Micro- and Nanotechnology, Technical University of Denmark, Produktionstorvet, building 423, DK-2800 Kgs. Lyngby, Denmark.
| | - Marie-Rose Van Calsteren
- Saint-Hyacinthe Research and Development Centre, Agriculture and Agri-Food Canada, 3600 Casavant Boulevard West, Saint-Hyacinthe, Quebec J2S 8E3, Canada.
| | - Richard Ipsen
- Department of Food Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark.
| | | | - Kristoffer Almdal
- Department of Micro- and Nanotechnology, Technical University of Denmark, Produktionstorvet, building 423, DK-2800 Kgs. Lyngby, Denmark.
| | - Maher Abou Hachem
- Enzyme and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Elektrovej, building 375, DK-2800 Kgs. Lyngby, Denmark.
| | - Birte Svensson
- Enzyme and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Elektrovej, building 375, DK-2800 Kgs. Lyngby, Denmark.
| |
Collapse
|
32
|
Zou Y, Li P, Zhang K, Wang L, Zhang M, Sun Z, Sun C, Geng Z, Xu W, Wang D. Effects of ultrasound-assisted alkaline extraction on the physiochemical and functional characteristics of chicken liver protein isolate. Poult Sci 2017; 96:2975-2985. [DOI: 10.3382/ps/pex049] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 02/25/2017] [Indexed: 11/20/2022] Open
|
33
|
Shafaei Z, Ghalandari B, Vaseghi A, Divsalar A, Haertlé T, Saboury AA, Sawyer L. β-Lactoglobulin: An efficient nanocarrier for advanced delivery systems. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2017; 13:1685-1692. [PMID: 28343017 DOI: 10.1016/j.nano.2017.03.007] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2016] [Revised: 02/18/2017] [Accepted: 03/14/2017] [Indexed: 01/10/2023]
Abstract
Thanks to the progress of nanotechnology there are several agent-delivery systems that can be selected to achieve rapid and specific delivery of a wide variety of biologically active agents. Consequently, the manipulation and engineering of biopolymers has become one of the most exciting subjects for those who study delivery systems on the nanoscale. In this regard, both nanoparticle formation and a carrier role have been observed in the case of the globular milk whey protein, β-lactoglobulin (β-LG), setting it apart from many other proteins. To date, many efforts adopting different approaches have created β-LG nanoparticles useful in forming delivery systems for various agents with specific targets. In this review, the potential of β-LG to play the role of an efficient and diverse carrier protein, as well as its ability to form a well-targeted nano-scale delivery system is discussed.
Collapse
Affiliation(s)
- Zahra Shafaei
- Department of Cell and Molecular Biology' Faculty of Biological Sciences' Kharazmi University, Tehran, Iran
| | - Behafarid Ghalandari
- Applied Biophotonics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Akbar Vaseghi
- Department of Biotechnology, Faculty of Advanced Science and Technologies of Isfahan, Isfahan, Iran
| | - Adeleh Divsalar
- Department of Cell and Molecular Biology' Faculty of Biological Sciences' Kharazmi University, Tehran, Iran.
| | - Thomas Haertlé
- FIP, BIA UR1268, Institut National de la Recherche Agronomique, Nantes, France
| | - Ali Akbar Saboury
- Institute of Biochemistry and Biophysics' University of Tehran, Tehran, Iran; Center of Excellence in Biothermodynamics, University of Tehran, Tehran, Iran
| | - Lindsay Sawyer
- School of Biological Sciences, The University of Edinburgh, Edinburgh, UK
| |
Collapse
|
34
|
Structural and emulsifying properties of sodium caseinate and lactoferrin influenced by ultrasound process. Food Hydrocoll 2017. [DOI: 10.1016/j.foodhyd.2016.08.038] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
35
|
Bello M, Fragoso-Vázquez MJ, Correa Basurto J. Energetic and conformational features linked to the monomeric and dimeric states of bovine BLG. Int J Biol Macromol 2016; 92:625-636. [PMID: 27456117 DOI: 10.1016/j.ijbiomac.2016.07.071] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Revised: 07/15/2016] [Accepted: 07/21/2016] [Indexed: 11/16/2022]
Abstract
Bovine β-lactoglobulin (BLG) belong to the lipocalin family. This is a group of proteins involved in the binding and transporting of hydrophobic molecules. Experimental and theoretical reports have stated its complex structural behavior in solution, with coupled effects between homodimerization and ligand recognition. Nonetheless, structural evidence at the atomic level about the cause of this coupled effect has not been reported to date. To address this issue microsecond molecular dynamics (MD) simulations were combined with the molecular mechanics generalized Born surface area (MM/GBSA) approach, clustering analysis and principal component analysis (PCA), to explore the conformational complexity of BLG protein-protein self-association and palmitic acid (PLM) or dodecyl sulfate (SDS) ligand recognition in the monomeric and dimeric state. MD simulations, coupled to the MM/GBSA method, revealed that dimerization exerts contrasting effects on the ligand-binding capacity of BLG. Protein dimerization decreases PLM affinity, promoting dimer association. For SDS the dimeric state increases affinity, enhancing dimer dissociation. MD simulations based on PCA revealed that while few differences in the conformational subspace are observed between the free and bound monomer and dimer coupling for PLM, substantial changes are observed between the free and bound monomer and dimer coupling for SDS.
Collapse
Affiliation(s)
- Martiniano Bello
- Laboratorio de Modelado Molecular, Bioinformática y Diseño de Fármacos de la Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis Y Diaz Mirón S/N, Col. Casco de Santo Tomas, Mexico City CP: 11340, Mexico.
| | - M Jonathan Fragoso-Vázquez
- Laboratorio de Modelado Molecular, Bioinformática y Diseño de Fármacos de la Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis Y Diaz Mirón S/N, Col. Casco de Santo Tomas, Mexico City CP: 11340, Mexico
| | - José Correa Basurto
- Laboratorio de Modelado Molecular, Bioinformática y Diseño de Fármacos de la Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis Y Diaz Mirón S/N, Col. Casco de Santo Tomas, Mexico City CP: 11340, Mexico
| |
Collapse
|
36
|
O'Sullivan J, Murray B, Flynn C, Norton I. The effect of ultrasound treatment on the structural, physical and emulsifying properties of animal and vegetable proteins. Food Hydrocoll 2016. [DOI: 10.1016/j.foodhyd.2015.02.009] [Citation(s) in RCA: 209] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
37
|
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.
Collapse
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.
| |
Collapse
|
38
|
Konuma T, Sakurai K, Yagi M, Goto Y, Fujisawa T, Takahashi S. Highly Collapsed Conformation of the Initial Folding Intermediates of β-Lactoglobulin with Non-Native α-Helix. J Mol Biol 2015; 427:3158-65. [DOI: 10.1016/j.jmb.2015.07.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Revised: 07/21/2015] [Accepted: 07/22/2015] [Indexed: 10/23/2022]
|
39
|
Knipp M, Ogata H, Soavi G, Cerullo G, Allegri A, Abbruzzetti S, Bruno S, Viappiani C, Bidon-Chanal A, Luque FJ. Structure and dynamics of the membrane attaching nitric oxide transporter nitrophorin 7. F1000Res 2015; 4:45. [PMID: 26167269 PMCID: PMC4482215 DOI: 10.12688/f1000research.6060.1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/28/2015] [Indexed: 11/20/2022] Open
Abstract
Nitrophorins represent a unique class of heme proteins that are able to perform the delicate transportation and release of the free-radical gaseous messenger nitric oxide (NO) in a pH-triggered manner. Besides its ability to bind to phospholipid membranes, the N-terminus contains an additional Leu-Pro-Gly stretch, which is a unique sequence trait, and the heme cavity is significantly altered with respect to other nitrophorins. These distinctive features encouraged us to solve the X-ray crystallographic structures of NP7 at low and high pH and bound with different heme ligands (nitric oxide, histamine, imidazole). The overall fold of the lipocalin motif is well preserved in the different X-ray structures and resembles the fold of other nitrophorins. However, a chain-like arrangement in the crystal lattice due to a number of head-to-tail electrostatic stabilizing interactions is found in NP7. Furthermore, the X-ray structures also reveal ligand-dependent changes in the orientation of the heme, as well as in specific interactions between the A-B and G-H loops, which are considered to be relevant for the biological function of nitrophorins. Fast and ultrafast laser triggered ligand rebinding experiments demonstrate the pH-dependent ligand migration within the cavities and the exit route. Finally, the topological distribution of pockets located around the heme as well as from inner cavities present at the rear of the protein provides a distinctive feature in NP7, so that while a loop gated exit mechanism to the solvent has been proposed for most nitrophorins, a more complex mechanism that involves several interconnected gas hosting cavities is proposed for NP7.
Collapse
Affiliation(s)
- Markus Knipp
- Max-Planck-Institut für Chemische Energiekonversion, Mülheim an der Ruhr, 45470, Germany
| | - Hideaki Ogata
- Max-Planck-Institut für Chemische Energiekonversion, Mülheim an der Ruhr, 45470, Germany
| | - Giancarlo Soavi
- Dipartimento di Fisica, Politecnico di Milano, Milano, 20133, Italy
| | - Giulio Cerullo
- Dipartimento di Fisica, Politecnico di Milano, Milano, 20133, Italy
| | - Alessandro Allegri
- Dipartimento di Fisica e Scienze della Terra, Università di Parma, Parma, 43124, Italy
| | - Stefania Abbruzzetti
- Dipartimento di Bioscienze, Università di Parma, Parma, 43124, Italy ; NEST, Istituto Nanoscienze, Consiglio Nazionale delle Ricerche, Pisa, 56127, Italy
| | - Stefano Bruno
- Dipartimento di Farmacia, Università di Parma, Parma, 43124, Italy
| | - Cristiano Viappiani
- Dipartimento di Fisica e Scienze della Terra, Università di Parma, Parma, 43124, Italy ; NEST, Istituto Nanoscienze, Consiglio Nazionale delle Ricerche, Pisa, 56127, Italy
| | - Axel Bidon-Chanal
- Departament de Fisicoquímica, Facultat de Farmàcia and Institute of Biomedicine, Universitat de Barcelona, Santa Coloma de Gramenet, E-08921, Spain
| | - F Javier Luque
- Departament de Fisicoquímica, Facultat de Farmàcia and Institute of Biomedicine, Universitat de Barcelona, Santa Coloma de Gramenet, E-08921, Spain
| |
Collapse
|
40
|
A. AH, G. UR, Ali F, Taye N, Chattopadhyay S, Das A. A reagent for specific recognition of cysteine in aqueous buffer and in natural milk: imaging studies, enzymatic reaction and analysis of whey protein. Chem Commun (Camb) 2015; 51:15592-5. [DOI: 10.1039/c5cc04876a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A new chemodosimetric reagent for specific detection of cysteine (Cys) and protein residues with the Cys-moiety having the sulfhydrylCysgroup.
Collapse
Affiliation(s)
- Anila H. A.
- Organic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune - 411008
- India
| | - Upendar Reddy G.
- Organic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune - 411008
- India
| | - Firoj Ali
- Organic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune - 411008
- India
| | - Nandaraj Taye
- Chromatin and Disease Laboratory
- National Center for Cell Science
- Pune
- India
| | | | - Amitava Das
- Organic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune - 411008
- India
| |
Collapse
|
41
|
Vondracek H, Dielmann-Gessner J, Lubitz W, Knipp M, Havenith M. THz absorption spectroscopy of solvated β-lactoglobulin. J Chem Phys 2014; 141:22D534. [DOI: 10.1063/1.4903237] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Hendrik Vondracek
- Ruhr-Universität Bochum, Universitätsstraße 150, 44780 Bochum, Germany
| | | | - Wolfgang Lubitz
- Max-Planck-Institut für Chemische Energiekonversion, Stiftstraße 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Markus Knipp
- Ruhr-Universität Bochum, Universitätsstraße 150, 44780 Bochum, Germany
- Max-Planck-Institut für Chemische Energiekonversion, Stiftstraße 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Martina Havenith
- Ruhr-Universität Bochum, Universitätsstraße 150, 44780 Bochum, Germany
| |
Collapse
|
42
|
O'Sullivan J, Arellano M, Pichot R, Norton I. The effect of ultrasound treatment on the structural, physical and emulsifying properties of dairy proteins. Food Hydrocoll 2014. [DOI: 10.1016/j.foodhyd.2014.05.011] [Citation(s) in RCA: 104] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
43
|
Kontopidis G, Nordle Gilliver A, Sawyer L. Ovine β-lactoglobulin at atomic resolution. Acta Crystallogr F Struct Biol Commun 2014; 70:1498-503. [PMID: 25372816 PMCID: PMC4231851 DOI: 10.1107/s2053230x14020950] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Accepted: 09/19/2014] [Indexed: 11/10/2022] Open
Abstract
The crystal structure of the triclinic form of the milk protein β-lactoglobulin from sheep (Ovis aries) at 1.1 Å resolution is described together with a comparison of the triclinic structures of the low-pH bovine and high-pH ovine proteins. All three structures are remarkably similar, despite the well known pH-dependent conformational transition described for the bovine and porcine proteins that occurs in solution. The high resolution of the present structure determination has allowed a more accurate description of the protein than has hitherto been possible, but it is still not clear whether flexibility changes in the external loops can compensate for the presence of a significant void in the unliganded interior of the structure.
Collapse
Affiliation(s)
- George Kontopidis
- Structural Biochemistry Group, Institute of Cell and Molecular Biology, The University of Edinburgh, Swann Building, King’s Buildings, Mayfield Road, Edinburgh EH10 3BF, Scotland
| | - Anna Nordle Gilliver
- Structural Biochemistry Group, Institute of Cell and Molecular Biology, The University of Edinburgh, Swann Building, King’s Buildings, Mayfield Road, Edinburgh EH10 3BF, Scotland
| | - Lindsay Sawyer
- Structural Biochemistry Group, Institute of Cell and Molecular Biology, The University of Edinburgh, Swann Building, King’s Buildings, Mayfield Road, Edinburgh EH10 3BF, Scotland
| |
Collapse
|
44
|
Probing of the interaction between β-lactoglobulin and the anticancer drug oxaliplatin. Appl Biochem Biotechnol 2014; 175:974-87. [PMID: 25351630 DOI: 10.1007/s12010-014-1341-0] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2014] [Accepted: 10/15/2014] [Indexed: 01/26/2023]
Abstract
The potential carrier role of β-lactoglobulin (β-LG) and its interactions with oxaliplatin were studied using various spectroscopic techniques (fluorescence, UV-visible, and circular dichroism (CD)) in an aqueous medium at two temperatures of 25 and 37 °C in combination with a molecular docking study. Fluorescence measurements have shown that the observed quenching is a combination of static and dynamic quenching with a predominant contribution of static mode. The presence of a single binding site located in the internal cavity of the β-barrel of β-LG was confirmed by molecular docking calculations. Thermodynamic data as well as molecular docking indicated that the hydrophobic interactions dominate in the binding site. Results of fluorescence resonance energy transfer (FRET) measurements in combination with docking results imply that resonance energy transfer occurs between β-LG and its ligand oxaliplatin. Additionally, CD results revealed that oxaliplatin binding has no influence on the β-LG structure. The molecular docking results indicate that docking may be an appropriate method for the prediction and confirmation of experimental results. Complementary molecular docking results may be useful for the determination of the binding mechanism of proteins such as β-LG in pharmaceutical and biophysical studies providing new insight in the novel pharmacology and new solutions in the formulation of advanced oral drug delivery systems.
Collapse
|
45
|
Qi PX, Wickham ED, Garcia RA. Structural and thermal stability of β-lactoglobulin as a result of interacting with sugar beet pectin. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:7567-7576. [PMID: 25003597 DOI: 10.1021/jf502699g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Changes in the structural and thermal stability of β-lactoglobulin (β-LG) induced by interacting with sugar beet pectin (SBP) have been studied by circular dichroism (CD), Fourier transform infrared, and steady-state as well as time-resolved fluorescence spectroscopic techniques. It has been demonstrated that SBP not only is capable of binding to native β-LG but also causes a significant loss in antiparallel β-sheet, ∼10%, accompanied by an increase in either random coil or turn structures. In addition, the interaction also disrupted the environments of all aromatic residues including Trp, Phe, and Tyr of β-LG as evidenced by near-UV CD and fluorescence. When preheated β-LG was combined with SBP, the secondary structure of β-LG was partially recovered, ∼4% gain in antiparallel β-sheet, and Trp19 fluorescence was recovered slightly. Although forming complexes with SBP did not significantly impact the thermal stability of individual secondary structural elements of β-LG, the environment of Trp19 was protected considerably.
Collapse
Affiliation(s)
- Phoebe X Qi
- Dairy and Functional Foods Research Unit and ‡Biobased and Other Animal Co-products Research Unit, Eastern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture , Wyndmoor, Pennsylvania 19038, United States
| | | | | |
Collapse
|
46
|
Bello M. Binding free energy calculations between bovine β-lactoglobulin and four fatty acids using the MMGBSA method. Biopolymers 2014; 101:1010-8. [DOI: 10.1002/bip.22483] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2014] [Revised: 03/02/2014] [Accepted: 03/05/2014] [Indexed: 12/17/2022]
Affiliation(s)
- Martiniano Bello
- Laboratorio de Modelado Molecular y Bioinformática de la Escuela Superior de Medicina, Instituto Politécnico Nacional, México. Plan de San Luis Y Diaz Mirón S/N; Col. Casco de Santo Tomas; 11340 México, D. F. México
| |
Collapse
|
47
|
Zeiler RN, Bolhuis PG. Exposure of thiol groups in the heat-induced denaturation of β-lactoglobulin. MOLECULAR SIMULATION 2014. [DOI: 10.1080/08927022.2014.926547] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
48
|
Evoli S, Guzzi R, Rizzuti B. Molecular simulations of β-lactoglobulin complexed with fatty acids reveal the structural basis of ligand affinity to internal and possible external binding sites. Proteins 2014; 82:2609-19. [DOI: 10.1002/prot.24625] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Revised: 05/29/2014] [Accepted: 06/05/2014] [Indexed: 11/06/2022]
Affiliation(s)
- Stefania Evoli
- Department of Physics; University of Calabria; Ponte P. Bucci, Cubo 31C 87036 Rende (CS) Italy
- CNR-IPCF UOS of Cosenza, LiCryL and CEMIF.Cal; University of Calabria; Ponte P. Bucci, Cubo 33B 87036 Rende (CS) Italy
| | - Rita Guzzi
- Department of Physics; University of Calabria; Ponte P. Bucci, Cubo 31C 87036 Rende (CS) Italy
- CNISM Unit; University of Calabria; Ponte P. Bucci, Cubo 31C 87036 Rende (CS) Italy
| | - Bruno Rizzuti
- CNR-IPCF UOS of Cosenza, LiCryL and CEMIF.Cal; University of Calabria; Ponte P. Bucci, Cubo 33B 87036 Rende (CS) Italy
| |
Collapse
|
49
|
Zhong J, Luo S, Liu C, Liu W. Steady-state kinetics of tryptic hydrolysis of β-lactoglobulin after dynamic high-pressure microfluidization treatment in relation to antigenicity. Eur Food Res Technol 2014. [DOI: 10.1007/s00217-014-2248-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
50
|
Keppler JK, Sönnichsen FD, Lorenzen PC, Schwarz K. Differences in heat stability and ligand binding among β-lactoglobulin genetic variants A, B and C using 1H NMR and fluorescence quenching. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2014; 1844:1083-93. [DOI: 10.1016/j.bbapap.2014.02.007] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Revised: 01/25/2014] [Accepted: 02/10/2014] [Indexed: 11/25/2022]
|