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Bogdanova LR, Nikiforova AA, Ziganshina SA, Zuev YF, Sedov IA. Influence of divalent metal cations on α-lactalbumin fibril formation. J Biol Inorg Chem 2024:10.1007/s00775-024-02071-z. [PMID: 39126483 DOI: 10.1007/s00775-024-02071-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Accepted: 07/28/2024] [Indexed: 08/12/2024]
Abstract
The effect of binding of divalent metal cations (Ca2+, Cu2+, Mg2+, Mn2+, Zn2+) on the kinetics of fibril formation of bovine α-lactalbumin at acidic conditions is considered. The kinetic parameters of the process were determined using a thioflavin T fluorescence assay. The DSC thermograms of bovine α-lactalbumin in the presence and absence of cations were recorded. The duration of the lag period correlates with the changes in the thermal stability of the molten globule of the protein in the presence of cations. The final thioflavin T fluorescence intensity after formation of the mature fibrils decreases under the influence of calcium ions which strongly bind to the monomeric protein, and increases in solutions containing copper and especially zinc. These ions seem to accelerate secondary nucleation processes and change the fibril morphology, which was confirmed by atomic force microscopy imaging.
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Affiliation(s)
- L R Bogdanova
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, Kazan, Russia
| | - A A Nikiforova
- Department of Chemistry, Kazan Federal University, Kazan, Russia
| | - S A Ziganshina
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, Kazan, Russia
| | - Yu F Zuev
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, Kazan, Russia
| | - I A Sedov
- Department of Chemistry, Kazan Federal University, Kazan, Russia.
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2
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Binding of silver ions to alpha-lactalbumin. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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3
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Olvera-Rosales LB, Cruz-Guerrero AE, García-Garibay JM, Gómez-Ruíz LC, Contreras-López E, Guzmán-Rodríguez F, González-Olivares LG. Bioactive peptides of whey: obtaining, activity, mechanism of action, and further applications. Crit Rev Food Sci Nutr 2022; 63:10351-10381. [PMID: 35612490 DOI: 10.1080/10408398.2022.2079113] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Bioactive peptides derived from diverse food proteins have been part of diverse investigations. Whey is a rich source of proteins and components related to biological activity. It is known that proteins have effects that promote health benefits. Peptides derived from whey proteins are currently widely studied. These bioactive peptides are amino acid sequences that are encrypted within the first structure of proteins, which required hydrolysis for their release. The hydrolysis could be through in vitro or in vivo enzymatic digestion and using microorganisms in fermented systems. The biological activities associated with bio-peptides include immunomodulatory properties, antibacterial, antihypertensive, antioxidant and opioid, etc. These functions are related to general conditions of health or reduced risk of certain chronic illnesses. To determine the suitability of these peptides/ingredients for applications in food technology, clinical studies are required to evaluate their bioavailability, health claims, and safety of them. This review aimed to describe the biological importance of whey proteins according to the incidence in human health, their role as bioactive peptides source, describing methods, and obtaining technics. In addition, the paper exposes biochemical mechanisms during the activity exerted by biopeptides of whey, and their application trends.
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Affiliation(s)
- L B Olvera-Rosales
- Universidad Autónoma del Estado de Hidalgo, Área Académica de Química, Ciudad del Conocimiento, Mineral de la Reforma, Hidalgo, México
| | - A E Cruz-Guerrero
- Departamento de Biotecnología, Universidad Autónoma Metropolitana, Unidad Iztapalapa. División de Ciencias Biológicas y de la Salud, Colonia Vicentina, Ciudad de México, México
| | - J M García-Garibay
- Departamento de Biotecnología, Universidad Autónoma Metropolitana, Unidad Iztapalapa. División de Ciencias Biológicas y de la Salud, Colonia Vicentina, Ciudad de México, México
- Departamento de Ciencias de la Alimentación Lerma de Villada, Universidad Autónoma Metropolitana-Lerma, Edo. de México, México
| | - L C Gómez-Ruíz
- Departamento de Biotecnología, Universidad Autónoma Metropolitana, Unidad Iztapalapa. División de Ciencias Biológicas y de la Salud, Colonia Vicentina, Ciudad de México, México
| | - E Contreras-López
- Universidad Autónoma del Estado de Hidalgo, Área Académica de Química, Ciudad del Conocimiento, Mineral de la Reforma, Hidalgo, México
| | - F Guzmán-Rodríguez
- Departamento de Biotecnología, Universidad Autónoma Metropolitana, Unidad Iztapalapa. División de Ciencias Biológicas y de la Salud, Colonia Vicentina, Ciudad de México, México
| | - L G González-Olivares
- Universidad Autónoma del Estado de Hidalgo, Área Académica de Química, Ciudad del Conocimiento, Mineral de la Reforma, Hidalgo, México
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Barone G, O'Regan J, Kelly AL, O'Mahony JA. Interactions between whey proteins and calcium salts and implications for the formulation of dairy protein‐based nutritional beverage products: A review. Compr Rev Food Sci Food Saf 2022; 21:1254-1274. [DOI: 10.1111/1541-4337.12884] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 11/20/2021] [Accepted: 11/30/2021] [Indexed: 01/29/2023]
Affiliation(s)
- Giovanni Barone
- School of Food and Nutritional Sciences University College Cork Cork Ireland
| | - Jonathan O'Regan
- Nestlé Development Centre Nutrition Wyeth Nutritionals Ireland Askeaton Limerick Ireland
| | - Alan L. Kelly
- School of Food and Nutritional Sciences University College Cork Cork Ireland
| | - James A. O'Mahony
- School of Food and Nutritional Sciences University College Cork Cork Ireland
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Al-Shabib NA, Khan JM, Malik A, Rehman MT, AlAjmi MF, Husain FM, Ahmed MZ, Alamery SF. Molecular interactions of food additive dye quinoline yellow (Qy) with alpha-lactalbumin: Spectroscopic and computational studies. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113215] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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6
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Huang M, Li X, Tong P, Gao J, Yuan J, Yang A, Chen H, Wu Y. Potential allergenicity assessment after bovine apo-α-lactalbumin binding to calcium ion. J Food Biochem 2020; 44:e13340. [PMID: 32667722 DOI: 10.1111/jfbc.13340] [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: 02/28/2020] [Revised: 05/17/2020] [Accepted: 05/27/2020] [Indexed: 11/28/2022]
Abstract
Bovine α-lactalbumin (α-LA) is recognized as a major milk allergen. Generally, α-LA in the natural state combines with a calcium ion, however, some studies have shown that calcium ions can binding the other metal binding sites in α-LA as well. In our study, the optimal condition of calcium ion binding to α-LA and the change of structure and allergenicity were explored. By optimizing the conditions, the maximum calcium binding amounts of apo-α-LA were obtained in a ratio of 1:4. The structure of α-LA after removal of calcium obviously changed by the spectroscopic detection. For the digestive stability, there was no obvious change in three forms of α-LA. While the allergenic properties were characterized by IgG/IgE inhibition ELISA and the human basophil KU812 degranulation assay. The results showed that IgG and IgE binding decreased, and the degranulation capacity of basophils weakened. Based on these results, calcium binding to apo-α-LA can reduce the potential allergenic properties. PRACTICAL APPLICATIONS: By optimizing the conditions, bovine apo-α-LA can obtain the most calcium binding amount. And calcium binding to apo-α-LA can reduce the potential allergenic properties. Compared with α-LA in the natural state, calcium binding to α-LA not only can reduce the allergenic properties, but also play a role in calcium supplementation. It might be used to guide the development of hypoallergenic α-LA and provide a method to reduce the potential allergenic properties of α-LA.
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Affiliation(s)
- Meijia Huang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China.,School of Food Science and Technology, NanchangUniversity, Nanchang, China
| | - Xin Li
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China.,School of Food Science and Technology, NanchangUniversity, Nanchang, China
| | - Ping Tong
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China.,School of Food Science and Technology, NanchangUniversity, Nanchang, China
| | - Jinyan Gao
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China.,School of Food Science and Technology, NanchangUniversity, Nanchang, China
| | - Juanli Yuan
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China.,School of Pharmacy, Nanchang University, Nanchang, China
| | - Anshu Yang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China.,Sino-German Joint Research Institute (Jiangxi-OAI), Nanchang University, Nanchang, China
| | - Hongbing Chen
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China.,Sino-German Joint Research Institute (Jiangxi-OAI), Nanchang University, Nanchang, China
| | - Yong Wu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China.,Sino-German Joint Research Institute (Jiangxi-OAI), Nanchang University, Nanchang, China
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7
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Rodzik A, Pomastowski P, Sagandykova GN, Buszewski B. Interactions of Whey Proteins with Metal Ions. Int J Mol Sci 2020; 21:E2156. [PMID: 32245108 PMCID: PMC7139725 DOI: 10.3390/ijms21062156] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 03/16/2020] [Accepted: 03/18/2020] [Indexed: 12/17/2022] Open
Abstract
Whey proteins tend to interact with metal ions, which have implications in different fields related to human life quality. There are two impacts of such interactions: they can provide opportunities for applications in food and nutraceuticals, but may lead to analytical challenges related to their study and outcomes for food processing, storage, and food interactions. Moreover, interactions of whey proteins with metal ions are complicated, requiring deep understanding, leading to consequences, such as metalloproteins, metallocomplexes, nanoparticles, or aggregates, creating a biologically active system. To understand the phenomena of metal-protein interactions, it is important to develop analytical approaches combined with studies of changes in the biological activity and to analyze the impact of such interactions on different fields. The aim of this review was to discuss chemistry of β-lactoglobulin, α-lactalbumin, and lactotransferrin, their interactions with different metal ions, analytical techniques used to study them and the implications for food and nutraceuticals.
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Affiliation(s)
- Agnieszka Rodzik
- Department of Environmental Chemistry and Bioanalysis, Faculty of Chemistry, Nicolaus Copernicus University, Gagarina 7, 87-100 Toruń, Poland; (A.R.); (G.N.S.); (B.B.)
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Wileńska 4, 87-100 Toruń, Poland
| | - Paweł Pomastowski
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Wileńska 4, 87-100 Toruń, Poland
| | - Gulyaim N. Sagandykova
- Department of Environmental Chemistry and Bioanalysis, Faculty of Chemistry, Nicolaus Copernicus University, Gagarina 7, 87-100 Toruń, Poland; (A.R.); (G.N.S.); (B.B.)
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Wileńska 4, 87-100 Toruń, Poland
| | - Bogusław Buszewski
- Department of Environmental Chemistry and Bioanalysis, Faculty of Chemistry, Nicolaus Copernicus University, Gagarina 7, 87-100 Toruń, Poland; (A.R.); (G.N.S.); (B.B.)
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Wileńska 4, 87-100 Toruń, Poland
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8
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Si Ahmed Zennia S, Mati A, Charron C, Cakir-Kiefer C, Kriznik A, Girardet JM. Effect of nonenzymatic deamidation on the structure stability of Camelus dromedarius α-lactalbumin. Food Chem 2019; 291:207-213. [PMID: 31006460 DOI: 10.1016/j.foodchem.2019.04.033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 03/22/2019] [Accepted: 04/08/2019] [Indexed: 01/20/2023]
Abstract
Camelid α-lactalbumin is the only known protein that can undergo nonenzymatic deamidation on two Asn residues. This leads to the generation of a mixture of unusual isoAsp and d-Asp residues that may impact health. The effect of deamidation on camel α-lactalbumin instability was investigated. Circular dichroism showed that the altered protein acquired secondary structure resulting in an increase in α-helix content. In good agreement, the 3D structure of camel α-lactalbumin determined by X-ray crystallography, displayed a short additional α-helix probably induced by deamidation, compared to the human and bovine counterparts. This α-helix was located in the C-terminal region and included residues 101-106. Differential scanning calorimetry together with the susceptibility to thermolysin showed that the deamidation process reinforced the structural stability of the α-lactalbumin at high temperature and its resistance toward proteolysis.
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Affiliation(s)
- Saliha Si Ahmed Zennia
- Université Mouloud Mammeri, Laboratoire de Recherche de Biochimie Analytique et Biotechnologies (LABAB), Tizi Ouzou, Algeria
| | - Abderrahmane Mati
- Université Mouloud Mammeri, Laboratoire de Recherche de Biochimie Analytique et Biotechnologies (LABAB), Tizi Ouzou, Algeria
| | - Christophe Charron
- Université de Lorraine, CNRS, Ingénierie Moléculaire et Physiopathologie Articulaire (IMoPA), UMR 7365, Nancy F-54000, France
| | - Céline Cakir-Kiefer
- Université de Lorraine, INRA, Unité de Recherche Animal et Fonctionnalités des Produits Animaux (UR AFPA), USC 340, Nancy F-54000, France
| | - Alexandre Kriznik
- Université de Lorraine, CNRS, Ingénierie Moléculaire et Physiopathologie Articulaire (IMoPA), UMR 7365, Nancy F-54000, France
| | - Jean-Michel Girardet
- Université de Lorraine, INRA, Unité de Recherche Animal et Fonctionnalités des Produits Animaux (UR AFPA), USC 340, Nancy F-54000, France.
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9
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Ma F, Wei J, Hao L, Shan Q, Li H, Gao D, Jin Y, Sun P. Bioactive Proteins and their Physiological Functions in Milk. Curr Protein Pept Sci 2019; 20:759-765. [DOI: 10.2174/1389203720666190125104532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 12/30/2018] [Accepted: 01/12/2019] [Indexed: 11/22/2022]
Abstract
Milk is the basic food for infants and newborn animals, providing a rich source of proteins,
carbohydrates, minerals, and vitamins. Milk also provides nourishment for people of all ages due to its
abundant nutrients, and it is used in the manufacture of numerous health-related products. Milk contains
caseins and whey proteins as the two major protein classes. Caseins fall into four major types
known as αs1-, αs2-, β- and κ-casein, whereas whey proteins comprise a mixture of globular proteins
including β-lactoglobulin, α-lactalbumin, serum albumin, lactoferrin, and other bioactivators. The various
biological activities of these proteins are involved in preventing and treating numerous nutritional,
physiological and metabolic diseases. This article reviews the bioactivities and functions of milk proteins,
which may shed light on future application of milk bioactive substances.
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Affiliation(s)
- Fengtao Ma
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Jingya Wei
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Liyuan Hao
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Qiang Shan
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Hongyang Li
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Duo Gao
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Yuhang Jin
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Peng Sun
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
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10
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Mohammadi F, Moeeni M. Investigation of the binding interactions of Bisdemethoxycurcumin, Diacetylcurcumin and Diacetylbisdemethoxycurcumin with bovine α-lactalbumin by experimental and theoretical analysis. J Biomol Struct Dyn 2016; 35:3486-3498. [DOI: 10.1080/07391102.2016.1259588] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Fakhrossadat Mohammadi
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Gava Zang, Zanjan 45137-66731, Iran
| | - Marzieh Moeeni
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Gava Zang, Zanjan 45137-66731, Iran
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11
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Kim KH, Yun S, Mok KH, Lee EK. Thermodynamic analysis of ANS binding to partially unfolded α-lactalbumin: correlation of endothermic to exothermic changeover with formation of authentic molten globules. J Mol Recognit 2016; 29:446-51. [DOI: 10.1002/jmr.2543] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2015] [Revised: 02/22/2016] [Accepted: 03/02/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Ki Hyung Kim
- Department of Bionano Engineering; Hanyang University - ERICA; Ansan Korea
| | - Soi Yun
- Department of Bionano Engineering; Hanyang University - ERICA; Ansan Korea
| | - K. H. Mok
- Trinity Biomedical Sciences Institute (TBSI); School of Immunology and Biochemistry; Dublin 2 Ireland
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN); Trinity College, The University of Dublin; Dublin 2 Ireland
| | - E. K. Lee
- Department of Bionano Engineering; Hanyang University - ERICA; Ansan Korea
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12
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13
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Park YJ, Kim KH, Lim DW, Lee E. Effects of pH and protein conformation on in-solution complexation between bovine α-lactalbumin and oleic acid: Binding trend analysis by using SPR and ITC. Process Biochem 2015. [DOI: 10.1016/j.procbio.2015.05.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Mohammadi F, Moeeni M. Study on the interactions of trans-resveratrol and curcumin with bovine α-lactalbumin by spectroscopic analysis and molecular docking. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 50:358-66. [DOI: 10.1016/j.msec.2015.02.007] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Revised: 01/18/2015] [Accepted: 02/07/2015] [Indexed: 01/26/2023]
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15
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Xu J, Luo HW, Wang YK, Sheng GP. Fluorescence approach for investigating binding properties between metals and soluble microbial products from a biological wastewater treatment plant. Process Biochem 2015. [DOI: 10.1016/j.procbio.2015.01.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Analysis of binding interaction of genistein and kaempferol with bovine α-lactalbumin. J Funct Foods 2015. [DOI: 10.1016/j.jff.2014.12.012] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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17
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pH- and heat-induced structural changes of bovine α-lactalbumin in response to oleic acid binding. Eur Food Res Technol 2012. [DOI: 10.1007/s00217-012-1882-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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Barbana C, Pérez MD. Interaction of α-lactalbumin with lipids and possible implications for its emulsifying properties – A review. Int Dairy J 2011. [DOI: 10.1016/j.idairyj.2011.04.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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19
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Barbana C, Sánchez L, Pérez MD. Bioactivity of α-Lactalbumin Related to its Interaction with Fatty Acids: A Review. Crit Rev Food Sci Nutr 2011; 51:783-94. [DOI: 10.1080/10408398.2010.481368] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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20
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Permyakov SE, Khokhlova TI, Uversky VN, Permyakov EA. Analysis of Ca2+/Mg2+ selectivity in alpha-lactalbumin and Ca(2+)-binding lysozyme reveals a distinct Mg(2+)-specific site in lysozyme. Proteins 2010; 78:2609-24. [PMID: 20602456 DOI: 10.1002/prot.22776] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The triggering of Ca(2+) signaling pathways relies on Ca(2+)/Mg(2+) specificity of proteins mediating these pathways. Two homologous milk Ca(2+)-binding proteins, bovine alpha-lactalbumin (bLA) and equine lysozyme (EQL), were analyzed using the simplest "four-state" scheme of metal- and temperature-induced structural changes in a protein. The association of Ca(2+)/Mg(2+) by native proteins is entropy-driven. Both proteins exhibit strong temperature dependences of apparent affinities to Ca(2+) and Mg(2+), due to low thermal stabilities of their apo-forms and relatively high unfavorable enthalpies of Mg(2+) association. The ratios of their apparent affinities to Ca(2+) and Mg(2+), being unusually high at low temperatures (5.3-6.5 orders of magnitude), reach the values inherent to classical EF-hand motifs at physiological temperatures. The comparison of phase diagrams predicted within the model of competitive Ca(2+) and Mg(2+) binding with experimental data strongly suggests that the association of Ca(2+) and Mg(2+) ions with bLA is a competitive process, whereas the primary Mg(2+) site of EQL is different from its Ca(2+)-binding site. The later conclusion is corroborated by qualitatively different molar ellipticity changes in near-UV region accompanying Mg(2+) and Ca(2+) association. The Ca(2+)/Mg(2+) selectivity of Mg(2+)-site of EQL is below an order of magnitude. EQL exhibits a distinct Mg(2+)-specific site, probably arising as an adaptation to the extracellular environment.
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Affiliation(s)
- Sergei E Permyakov
- Institute for Biological Instrumentation of the Russian Academy of Sciences, Pushchino, Moscow region 142290, Russia
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22
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Barbana C, Pérez MD, Pocovi C, Sánchez L, Wehbi Z. Interaction of human alpha-lactalbumin with fatty acids: determination of binding parameters. BIOCHEMISTRY (MOSCOW) 2008; 73:711-6. [PMID: 18620538 DOI: 10.1134/s0006297908060126] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The interaction of holo- and apo-forms of human alpha-lactalbumin with fatty acids was studied by a partition equilibrium method. Apo-alpha-lactalbumin, obtained by treatment with EDTA, displays one binding site for fatty acids, the association constants for oleic and palmitic acids being 1.9.10(6) and 4.2.10(5) M(-1), respectively. However, holo-alpha-lactalbumin was unable to bind fatty acids as measured by this technique. Likewise, no fatty acids bound to holo-alpha-lactalbumin, isolated using nondenaturing conditions, were detected by gas chromatography. These results demonstrate that the conformational change induced in alpha-lactalbumin by the removal of calcium enables the protein to interact with fatty acids.
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Affiliation(s)
- C Barbana
- Tecnologia y Bioquimica de los Alimentos, Facultad de Veterinaria, Universidad de Zaragoza, Zaragoza 50013, Spain.
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Schlepckow K, Wirmer J, Bachmann A, Kiefhaber T, Schwalbe H. Conserved folding pathways of alpha-lactalbumin and lysozyme revealed by kinetic CD, fluorescence, NMR, and interrupted refolding experiments. J Mol Biol 2008; 378:686-98. [PMID: 18377934 DOI: 10.1016/j.jmb.2008.02.033] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2007] [Revised: 02/04/2008] [Accepted: 02/08/2008] [Indexed: 11/17/2022]
Abstract
In this report, it is shown by a combination of stopped-flow CD, fluorescence, and time-resolved NMR studies that the Ca(2+)-induced refolding of bovine alpha-lactalbumin (BLA) at constant denaturant concentration (4 M urea) exhibits triple-exponential kinetics. In order to distinguish between parallel folding pathways and a strictly sequential formation of the native state, interrupted refolding experiments were conducted. We show here that the Ca(2+)-induced refolding of BLA involves parallel pathways and the transient formation of a folding intermediate on the millisecond timescale. Our data furthermore suggest that the two structurally homologous proteins BLA and hen egg white lysozyme share a common folding mechanism. We provide evidence that the guiding role of long-range interactions in the unfolded state of lysozyme in mediating intersubdomain interactions during folding is replaced in the case of BLA by the Ca(2+)-binding site. Time-resolved NMR spectroscopy, in combination with fast ion release from caged compounds, enables the measurement of complex protein folding kinetics at protein concentrations as low as 100 microM and the concomitant detection of conformational transitions with rate constants of up to 8 s(-1).
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Affiliation(s)
- Kai Schlepckow
- Center for Biomolecular Magnetic Resonance, Institute for Organic Chemistry and Chemical Biology, Johann Wolfgang Goethe University, Max-von-Laue-Str. 7, D-60438 Frankfurt/Main, Germany
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CHOBERT JEANMARC, SITOHY MAHMOUD, EL-ZAHAR KHALED, DALGALARRONDO MICHELE, CHOISET YVAN, HAERTLE THOMAS. STUDY OF CONFORMATIONAL CHANGES OF EWE'S HOLO (NATIVE) AND APO-α-LACTALBUMIN BY SPECTROSCOPY AND TRYPSINOLYSIS. J Food Biochem 2006. [DOI: 10.1111/j.1745-4514.2006.00072.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Van Dael H, Chedad A. An Equilibrium and a Kinetic Stopped-Flow Fluorescence Study of the Binding of Various Metal Ions to Goat Alpha-Lactalbumin. J Fluoresc 2006; 16:361-5. [PMID: 16791499 DOI: 10.1007/s10895-006-0066-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2005] [Accepted: 10/26/2005] [Indexed: 11/24/2022]
Abstract
Various metal ions bind to the protein alpha-lactalbumin prepared from goat milk. The stability of the protein after metal binding is compared with that of the apo-protein by monitoring the fluorescence of the tryptophan residues under equilibrium conditions. The kinetics of the metal binding is studied by stopped-flow fluorescence spectroscopy. By means of the Arrhenius plots, the activation energy with regard to the binding of the different ions is determined.
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Affiliation(s)
- H Van Dael
- Interdisciplinary Research Centre, K.U. Leuven Campus Kortrijk, Sabbelaan 53, 8500 Kortrijk, Belgium.
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26
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Bushmarina NA, Blanchet CE, Vernier G, Forge V. Cofactor effects on the protein folding reaction: acceleration of alpha-lactalbumin refolding by metal ions. Protein Sci 2006; 15:659-71. [PMID: 16522796 PMCID: PMC2242491 DOI: 10.1110/ps.051904206] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
About 30% of proteins require cofactors for their proper folding. The effects of cofactors on the folding reaction have been investigated with alpha-lactalbumin as a model protein and metal ions as cofactors. Metal ions accelerate the refolding of alpha-lactalbumin by lessening the energy barrier between the molten globule state and the transition state, mainly by decreasing the difference of entropy between the two states. These effects are linked to metal ion binding to the protein in the native state. Hence, relationships between the metal affinities for the intermediate states and those for the native state are observed. Some residual specificity for the calcium ion is still observed in the molten globule state, this specificity getting closer in the transition state to that of the native state. The comparison between kinetic and steady-state data in association with the Phi value method indicates the binding of the metal ions on the unfolded state of alpha-lactalbumin. Altogether, these results provide insight into cofactor effects on protein folding. They also suggest new possibilities to investigate the presence of residual native structures in the unfolded state of protein and the effects of such structures on the protein folding reaction and on protein stability.
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Affiliation(s)
- Natalia A Bushmarina
- Laboratoire de Biophysique Moléculaire et Cellulaire, Unité Mixte de Recherche 5090, Département Réponse et Dynamique Cellulaires, CEA-Grenoble, 38054 Grenoble cedex 9, France
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27
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Interaction of bovine -lactalbumin with fatty acids as determined by partition equilibrium and fluorescence spectroscopy. Int Dairy J 2006. [DOI: 10.1016/j.idairyj.2005.01.007] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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28
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Wehbi Z, Pérez MD, Dalgalarrondo M, Sánchez L, Calvo M, Chobert JM, Haertlé T. Study of ethanol-induced conformational changes of holo and apo α-lactalbumin by spectroscopy and limited proteolysis. Mol Nutr Food Res 2006; 50:34-43. [PMID: 16288500 DOI: 10.1002/mnfr.200500123] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
This study was performed to contribute to the analysis of alpha-lactalbumin "molten globule" state by using spectral and proteolysis techniques. Samples of holo and apo alpha-lactalbumin in the presence of different concentrations of ethanol were analyzed. Results of fluorescence spectroscopy of both forms showed that as ethanol concentration increased, the tryptophanyl residues became more accessible to the solvent. Near circular dichroism spectra of holo alpha-lactalbumin indicated that its tertiary structure was maintained in 20% ethanol whereas it was altered in 30 and 40% ethanol. For apo alpha-lactalbumin, spectra were similar in all samples studied. Holo alpha-lactalbumin was resistant to trypsinolysis in 0% ethanol, whereas it was easily hydrolyzed in 20 and 30% ethanol. In the case of the apo form and in the absence of ethanol, 70% of the protein was degraded after 1 h. However, in the presence of 20 and 30% ethanol, the overall reaction rate was lowered. Peptides obtained after tryptic hydrolysis were identified by reversed-phase high-performance liquid chromatography coupled to mass spectrometry. Differences in population of produced peptides indicate the changes of folding intermediates present in the studied alpha-lactalbumin solutions. This study demonstrated that proteolytic enzymes are suitable tools to determine protein structure complementing physico-chemical studies.
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Affiliation(s)
- Zeina Wehbi
- Tecnología y Bioquímica de los Alimentos, Facultad de Veterinaria, Universidad de Zaragoza, Miguel Servet, Zaragoza, Spain
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29
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Wehbi Z, Pérez MD, Sánchez L, Pocoví C, Barbana C, Calvo M. Effect of heat treatment on denaturation of bovine alpha-lactalbumin: determination of kinetic and thermodynamic parameters. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2005; 53:9730-6. [PMID: 16332122 DOI: 10.1021/jf050825y] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The effect of heat treatment on the denaturation of alpha-lactalbumin was studied, under different conditions, over a temperature range of 78-94 degrees C. The concentration of the residual immunoreactive protein after different treatments was determined by kinetic analysis, obtaining D and Z values. Thermodynamic parameters were also calculated. Denaturation of alpha-lactalbumin, measured by the loss of immunoreactivity, could be described as an order of reaction of n = 1.5. Results obtained indicated that alpha-lactalbumin was more heat-sensitive when treated in milk than in phosphate buffer. The protein was also denatured more rapidly in the apo form than in the calcium-saturated form. Besides, the thermal stability of apo-alpha-lactalbumin decreased with the binding of oleic acid.
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Affiliation(s)
- Zeina Wehbi
- Tecnología y Bioquímica de los Alimentos, Facultad de Veterinaria, Universidad de Zaragoza, c/Miguel Servet 177, 50013 Zaragoza, Spain
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30
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Rabiller-Baudry M, Chaufer B. Small molecular ion adsorption on proteins and DNAs revealed by separation techniques. J Chromatogr B Analyt Technol Biomed Life Sci 2004; 797:331-45. [PMID: 14630159 DOI: 10.1016/s1570-0232(03)00488-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Ion binding is a term that assumes that the ion is included in the solvation sphere characterising the biomolecule. The binding forces are not clearly stated except for electrostatic attraction; weak forces (hydrogen bonds and Van der Waals forces) are likely involved. Many publications have dealt with ion binding to proteins and the consequences over the past 10 years, but only a few studies were performed using high-performance liquid chromatography (HPLC: ion exchange, reversed phase without the well-identified immobilised metal affinity chromatography) and capillary zone electrophoresis (CZE). This review focuses on the binding of proteins and DNAs mainly to the oxyanions (phosphate, borate, citrate) and amines used as buffers for both the HPLC eluent and the background electrolyte of CZE. Such specific ion adsorption on biomolecules is evidenced by physico-chemical characteristics such as the mobility or retention volume, closely associated with the net charge, which differ from the expected or experimental data obtained under the conditions of an indifferent electrolyte. It is shown that ion binding to proteins is a key parameter in the electrostatic repulsion between the free protein and a fouled membrane in the ultrafiltration separation of a protein mixture.
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Affiliation(s)
- Murielle Rabiller-Baudry
- Laboratoire des Procédés de Séparation, Université Rennes 1, UC INRA, Campus de Beaulieu, Bat. 10A, 263 Avenue du Général Leclerc, CS 74205, 35042 Rennes Cedex, France.
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31
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Zhang Z, Goff H. Protein distribution at air interfaces in dairy foams and ice cream as affected by casein dissociation and emulsifiers. Int Dairy J 2004. [DOI: 10.1016/j.idairyj.2003.12.007] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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32
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Rasmussen BW, Bjerrum MJ. Ca(2+) and Na(+) binding to high affinity sites of calcium-containing proteins measured by capillary electrophoresis. J Inorg Biochem 2003; 95:113-23. [PMID: 12763655 DOI: 10.1016/s0162-0134(03)00093-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A method for the determination of stability constants of metal ion-protein binding, based on capillary electrophoresis, is presented. It utilizes the change in electrophoretic mobility of the protein upon binding of a metal ion. Taking advantage of edta(4-) as a controller of the free Ca(2+) concentration, a [Ca(2+)](free) as low as 10(-9) M has been attained in the solutions. We have found this method very useful for measuring binding of Ca(2+) to proteins, where the stability constant is in the range 10(5)-10(8) M(-1). The stability constants for the binding of Ca(2+) to proteinase K and bovine alpha-lactalbumin has by this method been measured at an ionic strength of 0.1 M, pH(c) 7.40 and 25 degrees C. For proteinase K a constant of 10(7.4) M(-1) is found, and for alpha-lactalbumin the constant has been found to be 10(9.2) M(-1). The structural stability of both proteins are found to be affected by the presence of Na(+) in the buffer solutions. From this observation, association constants for binding of Na(+) to the Ca(2+) sites have been calculated to 10(2.4) M(-1) for proteinase K and 10(3.5) M(-1) for alpha-lactalbumin. Less than 50 microg have been used of each protein in this study, an obvious advantage over other methods.
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Affiliation(s)
- Bodil W Rasmussen
- Department of Chemistry, The Royal Veterinary and Agricultural University, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
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