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Carver JA, Holt C. Functional and dysfunctional folding, association and aggregation of caseins. PROTEIN MISFOLDING 2019; 118:163-216. [DOI: 10.1016/bs.apcsb.2019.09.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Razuc M, Fernández Band B, Garrido M. Data fusion applied to the photodegradation study of ciprofloxacin using hyphenated detection systems (UV–Vis and fluorescence) and multivariate curve resolution. Microchem J 2018. [DOI: 10.1016/j.microc.2018.01.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Sulewska AM, Olsen K, Sørensen JC, Øgendal LH. Chaperone-like activity of β-casein and its effect on residualin vitroactivity of horseradish peroxidase. Int J Food Sci Technol 2014. [DOI: 10.1111/ijfs.12600] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anna M. Sulewska
- Department of Food Science; Faculty of Science; University of Copenhagen; Rolighedsvej 30 DK-1958 Frederiksberg C Denmark
| | - Karsten Olsen
- Department of Food Science; Faculty of Science; University of Copenhagen; Rolighedsvej 30 DK-1958 Frederiksberg C Denmark
| | - Jens C. Sørensen
- Department of Food Science; Faculty of Science; University of Copenhagen; Rolighedsvej 30 DK-1958 Frederiksberg C Denmark
| | - Lars H. Øgendal
- The Niels Bohr Institute; Faculty of Science; University of Copenhagen; Blegdamsvej 17 DK-2100 Copenhagen Ø Denmark
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Holt C, Carver JA, Ecroyd H, Thorn DC. Invited review: Caseins and the casein micelle: their biological functions, structures, and behavior in foods. J Dairy Sci 2013; 96:6127-46. [PMID: 23958008 DOI: 10.3168/jds.2013-6831] [Citation(s) in RCA: 282] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Accepted: 06/09/2013] [Indexed: 12/27/2022]
Abstract
A typical casein micelle contains thousands of casein molecules, most of which form thermodynamically stable complexes with nanoclusters of amorphous calcium phosphate. Like many other unfolded proteins, caseins have an actual or potential tendency to assemble into toxic amyloid fibrils, particularly at the high concentrations found in milk. Fibrils do not form in milk because an alternative aggregation pathway is followed that results in formation of the casein micelle. As a result of forming micelles, nutritious milk can be secreted and stored without causing either pathological calcification or amyloidosis of the mother's mammary tissue. The ability to sequester nanoclusters of amorphous calcium phosphate in a stable complex is not unique to caseins. It has been demonstrated using a number of noncasein secreted phosphoproteins and may be of general physiological importance in preventing calcification of other biofluids and soft tissues. Thus, competent noncasein phosphoproteins have similar patterns of phosphorylation and the same type of flexible, unfolded conformation as caseins. The ability to suppress amyloid fibril formation by forming an alternative amorphous aggregate is also not unique to caseins and underlies the action of molecular chaperones such as the small heat-shock proteins. The open structure of the protein matrix of casein micelles is fragile and easily perturbed by changes in its environment. Perturbations can cause the polypeptide chains to segregate into regions of greater and lesser density. As a result, the reliable determination of the native structure of casein micelles continues to be extremely challenging. The biological functions of caseins, such as their chaperone activity, are determined by their composition and flexible conformation and by how the casein polypeptide chains interact with each other. These same properties determine how caseins behave in the manufacture of many dairy products and how they can be used as functional ingredients in other foods.
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Affiliation(s)
- C Holt
- Institute of Molecular, Cell and Systems Biology, School of Life Sciences, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
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Fallahbagheri A, Saboury AA, Ma'mani L, Taghizadeh M, Khodarahmi R, Ranjbar S, Bohlooli M, Shafiee A, Foroumadi A, Sheibani N, Moosavi-Movahedi AA. Effects of silica nanoparticle supported ionic liquid as additive on thermal reversibility of human carbonic anhydrase II. Int J Biol Macromol 2012; 51:933-8. [PMID: 22829053 PMCID: PMC3677219 DOI: 10.1016/j.ijbiomac.2012.07.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Revised: 07/14/2012] [Accepted: 07/16/2012] [Indexed: 12/12/2022]
Abstract
Silica nanoparticle supported imidazolium ionic liquid [SNImIL] was synthesized and utilized as a biocompatible additive for studying the thermal reversibility of human carbonic anhydrase II (HCA II). For this purpose, we prepared additive by modification of nanoparticles through the grafting of ionic liquids on the surface of nanoparticles (SNImIL). The SNImIL were fully characterized by Fourier transform infrared spectroscopy, scanning electron microscopy and thermo gravimetric analysis. The characterization of HCA II was investigated by various techniques including UV-vis and ANS fluorescence spectrophotometry, differential scanning calorimetry, and docking study. SNImIL induced disaggregation, enhanced protein stability and increased thermal reversibility of HCA II by up to 42% at pH 7.75.
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Affiliation(s)
| | - Ali Akbar Saboury
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
- Center of Excellence in Biothermodynamics, University of Tehran, Tehran, Iran
| | - Leila Ma'mani
- Department of Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Taghizadeh
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Reza Khodarahmi
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Samira Ranjbar
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mousa Bohlooli
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Abbas Shafiee
- Department of Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran
- Center of Excellence in Biothermodynamics, University of Tehran, Tehran, Iran
| | - Alireza Foroumadi
- Department of Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Nader Sheibani
- Departments of Ophthalmology and Visual Sciences and Pharmacology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Ali Akbar Moosavi-Movahedi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
- Center of Excellence in Biothermodynamics, University of Tehran, Tehran, Iran
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Koudelka T, Dehle FC, Musgrave IF, Hoffmann P, Carver JA. Methionine oxidation enhances κ-casein amyloid fibril formation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:4144-4155. [PMID: 22443319 DOI: 10.1021/jf205168t] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The effects of protein oxidation, for example of methionine residues, are linked to many diseases, including those of protein misfolding, such as Alzheimer's disease. Protein misfolding diseases are characterized by the accumulation of insoluble proteinaceous aggregates comprised mainly of amyloid fibrils. Amyloid-containing bodies known as corpora amylacea (CA) are also found in mammary secretory tissue, where their presence slows milk flow. The major milk protein κ-casein readily forms amyloid fibrils under physiological conditions. Milk exists in an extracellular oxidizing environment. Accordingly, the two methionine residues in κ-casein (Met(95) and Met(106)) were selectively oxidized and the effects on the fibril-forming propensity, cellular toxicity, chaperone ability, and structure of κ-casein were determined. Oxidation resulted in an increase in the rate of fibril formation and a greater level of cellular toxicity. β-Casein, which inhibits κ-casein fibril formation in vitro, was less effective at suppressing fibril formation of oxidized κ-casein. The ability of κ-casein to prevent the amorphous aggregation of target proteins was slightly enhanced upon methionine oxidation, which may arise from the protein's greater exposed surface hydrophobicity. No significant changes to κ-casein's intrinsically disordered structure occurred upon oxidation. The enhanced rate of fibril formation of oxidized κ-casein, coupled with the reduced chaperone ability of β-casein to prevent this aggregation, may affect casein-casein interaction within the casein micelle and thereby promote κ-casein aggregation and contribute to the formation of CA.
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Affiliation(s)
- Tomas Koudelka
- School of Chemistry & Physics, University of Adelaide, Adelaide, South Australia 5005, Australia
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Moosavi-Movahedi A, Rajabzadeh H, Amani M, Nourouzian D, Zare K, Hadi H, Sharifzadeh A, Poursasan N, Ahmad F, Sheibani N. Acidic residue modifications restore chaperone activity of β-casein interacting with lysozyme. Int J Biol Macromol 2011; 49:616-21. [DOI: 10.1016/j.ijbiomac.2011.06.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2011] [Revised: 06/15/2011] [Accepted: 06/19/2011] [Indexed: 11/30/2022]
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Yousefi R, Jalili S. The synergistic chaperoning operation in a Bi-chaperone system consisting of alpha-crystallin and beta-casein: Bovine pancreatic insulin as the target protein. Colloids Surf B Biointerfaces 2011; 88:497-504. [DOI: 10.1016/j.colsurfb.2011.07.040] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2011] [Revised: 07/08/2011] [Accepted: 07/15/2011] [Indexed: 10/18/2022]
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Sabbaghian M, Ebrahim-Habibi A, Hosseinkhani S, Ghasemi A, Nemat-Gorgani M. Prevention of thermal aggregation of an allosteric protein by small molecules: Some mechanistic insights. Int J Biol Macromol 2011; 49:806-13. [DOI: 10.1016/j.ijbiomac.2011.07.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Revised: 07/21/2011] [Accepted: 07/21/2011] [Indexed: 12/18/2022]
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Abstract
The maintenance of the levels and correct folding state of proteins (proteostasis) is a fundamental prerequisite for life. Life has evolved complex mechanisms to maintain proteostasis and many of these that operate inside cells are now well understood. The same cannot yet be said of corresponding processes in extracellular fluids of the human body, where inappropriate protein aggregation is known to underpin many serious diseases such as Alzheimer's disease, type II diabetes and prion diseases. Recent research has uncovered a growing family of abundant extracellular chaperones in body fluids which appear to selectively bind to exposed regions of hydrophobicity on misfolded proteins to inhibit their toxicity and prevent them from aggregating to form insoluble deposits. These extracellular chaperones are also implicated in clearing the soluble, stabilized misfolded proteins from body fluids via receptor-mediated endocytosis for subsequent lysosomal degradation. Recent work also raises the possibility that extracellular chaperones may play roles in modulating the immune response. Future work will better define the in vivo functions of extracellular chaperones in proteostasis and immunology and pave the way for the development of new treatments for serious diseases.
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Dabbs RA, Wyatt AR, Yerbury JJ, Ecroyd H, Wilson MR. Extracellular Chaperones. Top Curr Chem (Cham) 2010. [PMID: 21516385 DOI: 10.1007/128_2010_85] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The maintenance of the levels and correct folding state of proteins (proteostasis) is a fundamental prerequisite for life. Life has evolved complex mechanisms to maintain proteostasis and many of these that operate inside cells are now well understood. The same cannot yet be said of corresponding processes in extracellular fluids of the human body, where inappropriate protein aggregation is known to underpin many serious diseases such as Alzheimer's disease, type II diabetes and prion diseases. Recent research has uncovered a growing family of abundant extracellular chaperones in body fluids which appear to selectively bind to exposed regions of hydrophobicity on misfolded proteins to inhibit their toxicity and prevent them from aggregating to form insoluble deposits. These extracellular chaperones are also implicated in clearing the soluble, stabilized misfolded proteins from body fluids via receptor-mediated endocytosis for subsequent lysosomal degradation. Recent work also raises the possibility that extracellular chaperones may play roles in modulating the immune response. Future work will better define the in vivo functions of extracellular chaperones in proteostasis and immunology and pave the way for the development of new treatments for serious diseases.
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Yousefi R, Gaudin JC, Chobert JM, Pourpak Z, Moin M, Moosavi-Movahedi AA, Haertle T. Micellisation and immunoreactivities of dimeric β-caseins. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2009; 1794:1775-83. [DOI: 10.1016/j.bbapap.2009.08.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2009] [Revised: 07/26/2009] [Accepted: 08/13/2009] [Indexed: 11/28/2022]
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Yousefi R, Shchutskaya YY, Zimny J, Gaudin JC, Moosavi-Movahedi AA, Muronetz VI, Zuev YF, Chobert JM, Haertlé T. Chaperone-like activities of different molecular forms of beta-casein. Importance of polarity of N-terminal hydrophilic domain. Biopolymers 2009; 91:623-32. [PMID: 19322774 DOI: 10.1002/bip.21190] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
As a member of intrinsically unstructured protein family, beta-casein (beta-CN) contains relatively high amount of prolyl residues, adopts noncompact and flexible structure and exhibits chaperone-like activity in vitro. Like many chaperones, native beta-CN does not contain cysteinyl residues and exhibits strong tendencies for self-association. The chaperone-like activities of three recombinant beta-CNs wild type (WT) beta-CN, C4 beta-CN (with cysteinyl residue in position 4) and C208 beta-CN (with cysteinyl residue in position 208), expressed and purified from E. coli, which, consequently, lack the phosphorylated residues, were examined and compared with that of native beta-CN using insulin and alcohol dehydrogenase as target/substrate proteins. The dimers (beta-CND) of C4-beta-CN and C208 beta-CN were also studied and their chaperone-like activities were compared with those of their monomeric forms. Lacking phosphorylation, WT beta-CN, C208 beta-CN, C4 beta-CN and C4 beta-CND exhibited significantly lower chaperone-like activities than native beta-CN. Dimerization of C208 beta-CN with two distal hydrophilic domains considerably improved its chaperone-like activity in comparison with its monomeric form. The obtained results demonstrate the significant role played by the polar contributions of phosphorylated residues and N-terminal hydrophilic domain as important functional elements in enhancing the chaperone-like activity of native beta-CN. (c) 2009 Wiley Periodicals, Inc. Biopolymers 91: 623-632, 2009.This article was originally published online as an accepted preprint. The "Published Online" date corresponds to the preprint version. You can request a copy of the preprint by emailing the Biopolymers editorial office at biopolymers@wiley.com.
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Affiliation(s)
- Reza Yousefi
- Biopolymères Interactions Assemblages, INRA, équipe Fonctions et Interactions des Protéines Laitières, Nantes Cedex 3, France
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Badraghi J, Moosavi-Movahedi AA, Saboury AA, Yousefi R, Sharifzadeh A, Hong J, Haertlé T, Niasari-Naslaji A, Sheibani N. Dual behavior of sodium dodecyl sulfate as enhancer or suppressor of insulin aggregation and chaperone-like activity of camel alphaS(1)-casein. Int J Biol Macromol 2009; 45:511-7. [PMID: 19723533 DOI: 10.1016/j.ijbiomac.2009.08.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2009] [Revised: 08/23/2009] [Accepted: 08/25/2009] [Indexed: 11/26/2022]
Abstract
Sodium dodecyl sulfate (SDS) at low concentrations considerably enhanced insulin aggregation and reduced the chaperone-like activity of purified camel alphaS(1)-casein (alphaS(1)-CN). These observed changes were the result of repulsive electrostatic interactions between both negative charged head groups of SDS and alphaS(1)-CN, and the net negative charge of insulin molecules, resulting in the greater exposure of hydrophobic patches of insulin and its enhanced aggregation. In contrast, enhanced hydrophobic interactions were primarily responsible for the conformational changes observed in insulin and alphaS(1)-CN at high SDS concentrations, resulting in increased binding of SDS and alphaS(1)-CN to insulin and its reduced aggregation.
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Affiliation(s)
- Jalil Badraghi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
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Badraghi J, Yousefi R, Saboury AA, Sharifzadeh A, Haertlé T, Ahmad F, Moosavi-Movahedi AA. Effect of salts and sodium dodecyl sulfate on chaperone activity of camel αS1-CN: Insulin as the target protein. Colloids Surf B Biointerfaces 2009; 71:300-5. [DOI: 10.1016/j.colsurfb.2009.03.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2008] [Revised: 03/11/2009] [Accepted: 03/11/2009] [Indexed: 10/21/2022]
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New Model for Polymerization of Oligomeric Alcohol Dehydrogenases into Nanoaggregates. Appl Biochem Biotechnol 2009; 160:1188-205. [DOI: 10.1007/s12010-009-8646-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2008] [Accepted: 04/12/2009] [Indexed: 10/20/2022]
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