1
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Chen N, Ren Y, Xing L, Liu Z, Chen L, Liu S, Zhou X. In situ Raman spectral observation of succinimide intermediates in amyloid fibrillation kinetics. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 309:123867. [PMID: 38198993 DOI: 10.1016/j.saa.2024.123867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 12/28/2023] [Accepted: 01/05/2024] [Indexed: 01/12/2024]
Abstract
Succinimide intermediates play the crucial role in the nucleation process for protein amyloid fibril formation, as they can usually induce a non-native conformation in a fraction of soluble proteins to render amyloidogenicity and neurotoxicity. Thus, in situ detection of succinimide intermediates during amyloid fibrillation kinetics is of considerable importance, albeit challenging, because these succinimides are generally unstable in physiological conditions. Here, we found an in situ Raman spectral fingerprint to trace the succinimide intermediates in amyloid fibril formation, wherein the carbonyl symmetric stretching of cyclic imide in the succinimide derivative is located at ca. 1790 cm-1. Using its intensity as an indicator of succinimide intermediates, we have in situ detected and unravelled the role of succinimide intermediates during the oligomer formation from the Bz-Asp-Gly-NH2 dipeptide or the amyloid fibrillation kinetics of lysozyme with thermal/acid treatment.
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Affiliation(s)
- Ning Chen
- Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yi Ren
- Key Laboratory of Tropical Biological Resources of the Ministry of Education, Department of Pharmaceutical Sciences, Hainan University, Haikou, Hainan 570228, China
| | - Lei Xing
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
| | - Zhongqiang Liu
- Key Laboratory of Tropical Biological Resources of the Ministry of Education, Department of Pharmaceutical Sciences, Hainan University, Haikou, Hainan 570228, China.
| | - Lin Chen
- School of Physics and Materials Engineering, Hefei Normal University, Hefei, Anhui 230601, China
| | - Shilin Liu
- Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xiaoguo Zhou
- Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
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2
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Huang S, Wu Z, Zhou B, Jiang X, Lavillette D, Fan G. Heat-Denatured Lysozyme is a Novel Potential Non-alcoholic Disinfectant Against Respiratory Virus. FOOD AND ENVIRONMENTAL VIROLOGY 2023; 15:212-223. [PMID: 37155116 PMCID: PMC10166042 DOI: 10.1007/s12560-023-09556-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 04/20/2023] [Indexed: 05/10/2023]
Abstract
Respiratory diseases are significant recurrent threats to global public health. Since the 1918 Spanish flu pandemic, seasonal influenza viruses continue to cause epidemics around the world each year. More recently, the COVID-19 global pandemic conducted a public health crisis with more than 6 million deaths and it also severely affected the global economy. Due to the phenomenon that people get infection from objects carrying viruses, it has aroused people's attention to home disinfection. As there is no ideal existing common domestic disinfectant, new and safer antiviral disinfectants are urgently needed. Lysozyme is a natural antibacterial agent widespread in nature and widely used in healthcare and food industry because of is recognized safety. Recently, it has been shown that thermally denatured lysozyme has the ability to kill murine norovirus and hepatitis A virus. In our study, we also demonstrated that heat-denatured lysozyme (HDLz) had an antiviral effect against H1N1 influenza A virus, and we optimized its antiviral activities by testing different heating denaturation conditions, to generalize this property, using pseudotype virus neutralization assay, we found that HDLz can also inhibit the entry of H5N1, H5N6, and H7N1 avian influenza viruses as well as SARS-CoV and SARS-CoV-2 particles in cell with IC50 at the ng/mL range. Finally, using western blot analysis, we provide evidence that HDLz polymerization correlates with antiviral effect, which may be a precious possible quality control test. Altogether, our data support HDLz as a powerful anti-respiratory virus disinfectant as a sole or additive of current disinfectants to reduce concentration of toxic component.
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Affiliation(s)
- Suqiong Huang
- Chongqing Research Center for Pharmaceutical Engineering, School of Pharmacy, Chongqing Medical University, Yuzhong District, No. 1 Yixueyuan Road, Chongqing, 400016 People’s Republic of China
- Department of Pharmacy, Sichuan Provincial People’s Hospital Qionglai Hospital, Medical Center Hospital of Qionglai City, No. 172 Xinglin Road, Qionglai City, Chengdu, Sichuan Province 611530 People’s Republic of China
| | - Zhenghua Wu
- Department of Clinical Pharmacy, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200080 People’s Republic of China
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, 200240 People’s Republic of China
| | - Bingjie Zhou
- University of CAS, Beijing, 101408 China
- CAS Key Laboratory of Molecular Virology & Immunology, Institut Pasteur of Shanghai CAS, 320 Yueyang Road, Shanghai, 200031 China
| | - Xinhui Jiang
- Chongqing Research Center for Pharmaceutical Engineering, School of Pharmacy, Chongqing Medical University, Yuzhong District, No. 1 Yixueyuan Road, Chongqing, 400016 People’s Republic of China
| | - Dimitri Lavillette
- CAS Key Laboratory of Molecular Virology & Immunology, Institut Pasteur of Shanghai CAS, 320 Yueyang Road, Shanghai, 200031 China
- Pasteurien College, Soochow University, Jiangsu, 215006 China
| | - Guorong Fan
- Chongqing Research Center for Pharmaceutical Engineering, School of Pharmacy, Chongqing Medical University, Yuzhong District, No. 1 Yixueyuan Road, Chongqing, 400016 People’s Republic of China
- Department of Clinical Pharmacy, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200080 People’s Republic of China
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3
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Zhuravleva YS, Sherin PS. Influence of pH on radical reactions between kynurenic acid and amino acids tryptophan and tyrosine. Part II. Amino acids within the protein globule of lysozyme. Free Radic Biol Med 2021; 174:211-224. [PMID: 34363946 DOI: 10.1016/j.freeradbiomed.2021.08.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 07/29/2021] [Accepted: 08/01/2021] [Indexed: 12/20/2022]
Abstract
An acidosis, a decrease of pH within a living tissue, may alter yields of radical reactions if participating radicals undergo partial or complete protonation. One of photosensitizers found in the human eye lens, kynurenic acid (KNA-), possesses pKa 5.5 for its radical form that is close to physiological pH 6.89 for a healthy lens. In this work we studied the influence of pH on mechanisms and products of photoinduced radical reactions between KNA- and amino acids tryptophan (Trp) and tyrosine (Tyr) within a globule of model protein, Hen White Egg Lysozyme (HEWL). Our results show that the rate constant of back electron transfer from kynurenyl to HEWL• radicals with the restoration of initial reagents - the major decay pathway for these radicals - does not change in the pH 3-7. The quantum yield of HEWL degradation is also pH independent, however a shift of pH from 7 to 5 completely changes the outcome of photoinduced damage to HEWL from intermolecular cross-linking to oxygenation. HPLC-MS analysis has shown that four of six Trp and all Tyr residues of HEWL are modified in different extents at all pH, but the lowering of pH from 7 to 5 significantly changes the direction of main photodamage from Trp62 to Trp108 located at the entrance and bottom of enzymatic center, respectively. A decrease of intermolecular cross-links via Trp62 is followed by an increase in quantities of intramolecular cross-links Tyr20-Tyr23 and Tyr23-Tyr53. The obtained results point out the competence of cross-linking and oxygenation reactions for Trp and Tyr radicals within a protein globule and significant increase of oxygenation to the total damage of protein in the case of cross-linking deceleration by coulombic repulsion of positively charged protein globules.
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Affiliation(s)
- Yuliya S Zhuravleva
- International Tomography Center SB RAS, Institutskaya street 3a, Novosibirsk, Russia; Novosibirsk State University, Pirogova street 2, Novosibirsk, Russia
| | - Peter S Sherin
- International Tomography Center SB RAS, Institutskaya street 3a, Novosibirsk, Russia; Novosibirsk State University, Pirogova street 2, Novosibirsk, Russia.
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4
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Gutiérrez-Hernández A, Richaud A, Chacón-García L, Cortés-García CJ, Méndez F, Contreras-Celedón CA. Deep Eutectic Solvent Choline Chloride/ p-toluenesulfonic Acid and Water Favor the Enthalpy-Driven Binding of Arylamines to Maleimide in Aza-Michael Addition. J Org Chem 2021; 86:223-234. [PMID: 33232142 DOI: 10.1021/acs.joc.0c02039] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Deep eutectic solvents (DESs) have been considered "the organic reaction medium of the century" because they can be used as solvents and active catalysts in chemical reactions. However, experimental and theoretical studies are still needed to provide information on the structures of DESs, the kinetics and thermodynamics properties, the interactions between the DESs and the substrates, the effect of water on the DES supramolecular network and its physicochemical properties, and so forth. This information is very useful to understand the essence of the processes that take place in the catalysis of chemical reactions and, therefore, to help in the design of a DES for a specific reaction and sample. This article shows a systematic study of the impact of DES choline chloride/p-toluenesulfonic acid and DES choline chloride/p-toluenesulfonic acid-water in the aza-Michael addition of arylamines to maleimide to obtain aminopyrrolidine-2,5-dione derivatives. The derivatives are obtained under very mild reaction conditions with good yield. The global reaction is exothermic, spontaneous, permitted by enthalpy, and prohibited for entropy. The calculated potential energy surface shows a reaction mechanism of six steps controlled by enthalpy (except the last step that is controlled by entropy). The water incorporated in the supramolecular DES complex stabilizes the transition states and favors the enthalpy-driven binding. A set of H/D exchange NMR experiments validates the transition state existing in the fourth stage of the mechanism.
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Affiliation(s)
- Abelardo Gutiérrez-Hernández
- Departamento de Síntesis Orgánica, Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edif. B-1, Ciudad Universitaria, Francisco J. Mújica, s/n, Morelia 58030, Michoacán, Mexico
| | - Arlette Richaud
- Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, A.P. 55-534, México D. F. 09340, Mexico.,Loire Valley Institute for Advanced Studies, Orléans & Tours, France CEMHTI, 1 Avenue de la Recherche Scientifique, Orléans 45000, France
| | - Luis Chacón-García
- Departamento de Síntesis Orgánica, Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edif. B-1, Ciudad Universitaria, Francisco J. Mújica, s/n, Morelia 58030, Michoacán, Mexico
| | - Carlos J Cortés-García
- Departamento de Síntesis Orgánica, Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edif. B-1, Ciudad Universitaria, Francisco J. Mújica, s/n, Morelia 58030, Michoacán, Mexico
| | - Francisco Méndez
- Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, A.P. 55-534, México D. F. 09340, Mexico.,Loire Valley Institute for Advanced Studies, Orléans & Tours, France CEMHTI, 1 Avenue de la Recherche Scientifique, Orléans 45000, France
| | - Claudia Araceli Contreras-Celedón
- Departamento de Síntesis Orgánica, Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edif. B-1, Ciudad Universitaria, Francisco J. Mújica, s/n, Morelia 58030, Michoacán, Mexico
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5
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Savina ED, Tsentalovich YP, Sherin PS. UV-A induced damage to lysozyme via Type I photochemical reactions sensitized by kynurenic acid. Free Radic Biol Med 2020; 152:482-493. [PMID: 31751763 DOI: 10.1016/j.freeradbiomed.2019.11.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 11/12/2019] [Accepted: 11/13/2019] [Indexed: 02/06/2023]
Abstract
In this work we studied the mechanisms of Type I photodamage to a model protein, hen egg white lysozyme (HEWL), sensitized by kynurenic acid (KNA) - one of the most efficient photosensitizers of the human eye lens present in trace amounts within tissue. The kynurenic acid radical, KNA•-, formed in the quenching of triplet KNA by HEWL, can be readily oxidized by molecular oxygen with the formation of superoxide anion radical O2•-. This leads to two ways of damage to proteins: either via the direct reactions between KNA•- and HEWL• radicals (Type Ia) or via the reactions between superoxide anion O2•- and HEWL• radicals (Type Ib). Our results demonstrate significant degradation of the protein during Type Ia photolysis with the formation of various oligomeric and oxygenated forms of HEWL and several deoxygenated products of KNA. Liquid chromatography-mass spectrometry analysis revealed the cross-linking of HEWL via tryptophan (Trp62) and tyrosine (Tyr23) residues and, for the first time, the covalent binding of KNA to protein via tryptophan (Trp62 and Trp123) residues. It was found that Type Ib reactions lead to substantially smaller damage to HEWL; the degradation quantum yields (Φdeg) of HEWL are 1.3 ± 0.3% and 0.12 ± 0.03% for Type Ia and Ib photolyses, respectively. Low Φdeg values for both types of photolysis indicate the Back Electron Transfer (BET) with the restoration of initial reagents as the main radical decay path with significantly higher BET efficiency in the case of Type Ib reactions. Therefore, in essentially oxygen-free tissues like the eye lens, the direct radical reactions via Type Ia mechanism could induce significantly larger damage to proteins, leading to their cross-linking and oxidation. The accumulation of these modifications can cause the development of various diseases, in particular, cataracts in the eye lens.
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Affiliation(s)
- Ekaterina D Savina
- International Tomography Center SB RAS, Institutskaya str. 3A, 630090, Novosibirsk, Russia; Novosibirsk State University, Pirogova str. 2, 630090, Novosibirsk, Russia
| | - Yuri P Tsentalovich
- International Tomography Center SB RAS, Institutskaya str. 3A, 630090, Novosibirsk, Russia; Novosibirsk State University, Pirogova str. 2, 630090, Novosibirsk, Russia
| | - Peter S Sherin
- International Tomography Center SB RAS, Institutskaya str. 3A, 630090, Novosibirsk, Russia; Novosibirsk State University, Pirogova str. 2, 630090, Novosibirsk, Russia.
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6
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Cao M, Mulagapati SHR, Vemulapalli B, Wang J, Saveliev SV, Urh M, Hunter A, Liu D. Characterization and quantification of succinimide using peptide mapping under low-pH conditions and hydrophobic interaction chromatography. Anal Biochem 2019; 566:151-159. [DOI: 10.1016/j.ab.2018.11.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 11/17/2018] [Accepted: 11/26/2018] [Indexed: 11/16/2022]
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7
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Boire A, Bouchoux A, Bouhallab S, Chapeau AL, Croguennec T, Ferraro V, Lechevalier V, Menut P, Pézennec S, Renard D, Santé-Lhoutellier V, Laleg K, Micard V, Riaublanc A, Anton M. Proteins for the future: A soft matter approach to link basic knowledge and innovative applications. INNOV FOOD SCI EMERG 2018. [DOI: 10.1016/j.ifset.2017.06.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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8
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Lee J, Kim I, Yeo S, Kim D, Kim M. Dextran-Conjugated Lysozymes Inhibit the Growth of Shigella sonnei and Viral Hemorrhagic Septicemia Virus. Prev Nutr Food Sci 2018; 23:60-69. [PMID: 29662849 PMCID: PMC5894787 DOI: 10.3746/pnf.2018.23.1.60] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 01/11/2018] [Indexed: 01/25/2023] Open
Abstract
Lysozyme is well known as a natural antimicrobial agent, but its function is limited in that it only combats Gram-positive bacteria. We investigated the inhibitory effects of dextran-conjugated lysozymes (DLs) against some strains of Gram-negative bacteria and viral hemorrhagic septicemia virus (VHSV). The Maillard reactions of the DL were performed at various pHs (3.0, 7.0, and 8.5) in the presence of saturated KBr solution for 1, 3, 5, 7, and 9 days. The growth inhibition effects against Gram-negative bacterial strains, such as Escherichia coli, Vibrio parahaemolyticus, Pseudomonas aeruginosa, Shigella sonnei, and Shigella flexneri were found only in some DLs. DLs incubated at pH 7.0 for 9 days strongly inhibited growth of S. sonnei (92.9%). Fathead minnow (FHM) cells were infected with VHSV. DLs treated at all pHs for 1 day resulted in more than 80% viability of VHSV-infected FHM cells. The results of this study suggest that our DLs can be useful in food preservatives, pharmaceuticals, or aquatic feed due to their inhibitory effects against pathogenic bacteria and viral infections.
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Affiliation(s)
- Joongjae Lee
- Department of Food Science and Nutrition, Dankook University, Chungnam 31116, Korea.,Natural Nutraceuticals Industrialization Research Center, Dankook University, Chungnam 31116, Korea
| | - Inyong Kim
- Department of Food Science and Nutrition, Dankook University, Chungnam 31116, Korea.,Natural Nutraceuticals Industrialization Research Center, Dankook University, Chungnam 31116, Korea
| | - Seoungsoon Yeo
- Department of Food Science and Nutrition, Dankook University, Chungnam 31116, Korea.,Natural Nutraceuticals Industrialization Research Center, Dankook University, Chungnam 31116, Korea
| | - Duwoon Kim
- Department of Food Science and Technology and Foodborne Virus Research Center, Chonnam National University, Gwangju 61186, Korea
| | - Misook Kim
- Department of Food Science and Nutrition, Dankook University, Chungnam 31116, Korea.,Natural Nutraceuticals Industrialization Research Center, Dankook University, Chungnam 31116, Korea
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9
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Sheng L, Su P, Han K, Chen J, Cao A, Zhang Z, Jin Y, Ma M. Synthesis and structural characterization of lysozyme–pullulan conjugates obtained by the Maillard reaction. Food Hydrocoll 2017. [DOI: 10.1016/j.foodhyd.2017.04.026] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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10
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Derde M, Vié V, Walrant A, Sagan S, Lechevalier V, Guérin-Dubiard C, Pezennec S, Cochet MF, Paboeuf G, Pasco M, Baron F, Gautier M, Jan S, Nau F. Antimicrobial activity of lysozyme isoforms: Key molecular features. Biopolymers 2017; 107. [DOI: 10.1002/bip.23040] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 07/13/2017] [Accepted: 07/17/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Melanie Derde
- STLO, UMR1253, Agrocampus Ouest, INRA; Rennes F-35 France
| | - Véronique Vié
- Université de Rennes 1, Institut de Physique de Rennes, UMR6251, CNRS; Rennes F-35 France
| | - Astrid Walrant
- Sorbonne Universités, UPMC Université Paris 06, PSL Research University, Ecole Normale Supérieure, CNRS, Laboratoire des Biomolécules (LBM); Paris F-75 France
| | - Sandrine Sagan
- Sorbonne Universités, UPMC Université Paris 06, PSL Research University, Ecole Normale Supérieure, CNRS, Laboratoire des Biomolécules (LBM); Paris F-75 France
| | | | | | | | | | - Gilles Paboeuf
- Université de Rennes 1, Institut de Physique de Rennes, UMR6251, CNRS; Rennes F-35 France
| | | | - Florence Baron
- STLO, UMR1253, Agrocampus Ouest, INRA; Rennes F-35 France
| | - Michel Gautier
- STLO, UMR1253, Agrocampus Ouest, INRA; Rennes F-35 France
| | - Sophie Jan
- STLO, UMR1253, Agrocampus Ouest, INRA; Rennes F-35 France
| | - Françoise Nau
- STLO, UMR1253, Agrocampus Ouest, INRA; Rennes F-35 France
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12
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Lechevalier V, Guérin-Dubiard C, Anton M, Beaumal V, David Briand E, Gillard A, Le Gouar Y, Musikaphun N, Pasco M, Dupont D, Nau F. Effect of dry heat treatment of egg white powder on its functional, nutritional and allergenic properties. J FOOD ENG 2017. [DOI: 10.1016/j.jfoodeng.2016.09.022] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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13
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Kabadi PG, Sankaran PK, Palanivelu DV, Adhikary L, Khedkar A, Chatterjee A. Mass Spectrometry Based Mechanistic Insights into Formation of Tris Conjugates: Implications on Protein Biopharmaceutics. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2016; 27:1677-1685. [PMID: 27488315 DOI: 10.1007/s13361-016-1447-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 06/23/2016] [Accepted: 07/05/2016] [Indexed: 06/06/2023]
Abstract
We present here extensive mass spectrometric studies on the formation of a Tris conjugate with a therapeutic monoclonal antibody. The results not only demonstrate the reactive nature of the Tris molecule but also the sequence and reaction conditions that trigger this reactivity. The results corroborate the fact that proteins are, in general, prone to conjugation and/or adduct formation reactions and any modification due to this essentially leads to formation of impurities in a protein sample. Further, the results demonstrate that the conjugation reaction happens via a succinimide intermediate and has sequence specificity. Additionally, the data presented in this study also shows that the Tris formation is produced in-solution and is not an in-source phenomenon. We believe that the facts given here will open further avenues on exploration of Tris as a conjugating agent as well as ensure that the use of Tris or any ionic buffer in the process of producing a biopharmaceutical drug is monitored closely for the presence of such conjugate formation. Graphical Abstract ᅟ.
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Affiliation(s)
- Pradeep G Kabadi
- Molecular Characterization Laboratory, Biocon Research Limited, Biocon Limited, Biocon Park, Bommasandra - Jigani Link Road, Bommasandra Industrial Area Phase IV, Bangalore, 560099, India
| | - Praveen Kallamvalliillam Sankaran
- Molecular Characterization Laboratory, Biocon Research Limited, Biocon Limited, Biocon Park, Bommasandra - Jigani Link Road, Bommasandra Industrial Area Phase IV, Bangalore, 560099, India
| | - Dinesh V Palanivelu
- Molecular Characterization Laboratory, Biocon Research Limited, Biocon Limited, Biocon Park, Bommasandra - Jigani Link Road, Bommasandra Industrial Area Phase IV, Bangalore, 560099, India
| | - Laxmi Adhikary
- Molecular Characterization Laboratory, Biocon Research Limited, Biocon Limited, Biocon Park, Bommasandra - Jigani Link Road, Bommasandra Industrial Area Phase IV, Bangalore, 560099, India
| | - Anand Khedkar
- Molecular Characterization Laboratory, Biocon Research Limited, Biocon Limited, Biocon Park, Bommasandra - Jigani Link Road, Bommasandra Industrial Area Phase IV, Bangalore, 560099, India
| | - Amarnath Chatterjee
- Molecular Characterization Laboratory, Biocon Research Limited, Biocon Limited, Biocon Park, Bommasandra - Jigani Link Road, Bommasandra Industrial Area Phase IV, Bangalore, 560099, India.
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14
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Derde M, Nau F, Guérin-Dubiard C, Lechevalier V, Paboeuf G, Jan S, Baron F, Gautier M, Vié V. Native and dry-heated lysozyme interactions with membrane lipid monolayers: Lipid packing modifications of a phospholipid mixture, model of the Escherichia coli cytoplasmic membrane. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:1065-73. [PMID: 25615689 DOI: 10.1016/j.bbamem.2015.01.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 01/05/2015] [Accepted: 01/11/2015] [Indexed: 11/17/2022]
Abstract
Antimicrobial resistance is currently an important public health issue. The need for innovative antimicrobials is therefore growing. The ideal antimicrobial compound should limit antimicrobial resistance. Antimicrobial peptides or proteins such as hen egg white lysozyme are promising molecules that act on bacterial membranes. Hen egg white lysozyme has recently been identified as active on Gram-negative bacteria due to disruption of the outer and cytoplasmic membrane integrity. Furthermore, dry-heating (7 days and 80 °C) improves the membrane activity of lysozyme, resulting in higher antimicrobial activity. These in vivo findings suggest interactions between lysozyme and membrane lipids. This is consistent with the findings of several other authors who have shown lysozyme interaction with bacterial phospholipids such as phosphatidylglycerol and cardiolipin. However, until now, the interaction between lysozyme and bacterial cytoplasmic phospholipids has been in need of clarification. This study proposes the use of monolayer models with a realistic bacterial phospholipid composition in physiological conditions. The lysozyme/phospholipid interactions have been studied by surface pressure measurements, ellipsometry and atomic force microscopy. Native lysozyme has proved able to absorb and insert into a bacterial phospholipid monolayer, resulting in lipid packing reorganization, which in turn has lead to lateral cohesion modifications between phospholipids. Dry-heating of lysozyme has increased insertion capacity and ability to induce lipid packing modifications. These in vitro findings are then consistent with the increased membrane disruption potential of dry heated lysozyme in vivo compared to native lysozyme. Moreover, an eggPC monolayer study suggested that lysozyme/phospholipid interactions are specific to bacterial cytoplasmic membranes.
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Affiliation(s)
- Melanie Derde
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France.
| | - Françoise Nau
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Catherine Guérin-Dubiard
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Valérie Lechevalier
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Gilles Paboeuf
- Université de Rennes 1, Institut de physique de Rennes, UMR6251, CNRS, F-35042 Rennes, France
| | - Sophie Jan
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Florence Baron
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Michel Gautier
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Véronique Vié
- Université de Rennes 1, Institut de physique de Rennes, UMR6251, CNRS, F-35042 Rennes, France
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15
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Lechevalier V, Musikaphun N, Gillard A, Pasco M, Guérin-Dubiard C, Husson F, Nau F. Effects of dry heating on the progression of in vitro digestion of egg white proteins: contribution of multifactorial data analysis. Food Funct 2015; 6:1578-90. [DOI: 10.1039/c4fo01156b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In vitrodigestion of egg white powders: multiple factor analysis to follow the dry-heating effect.
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Affiliation(s)
- Valerie Lechevalier
- Agrocampus Ouest
- F-35042 Rennes
- France
- Institut National de la Recherche Agronomique (INRA)
- F-35042 Rennes
| | - Nuttinee Musikaphun
- Agrocampus Ouest
- F-35042 Rennes
- France
- Institut National de la Recherche Agronomique (INRA)
- F-35042 Rennes
| | - Angelique Gillard
- Agrocampus Ouest
- F-35042 Rennes
- France
- Institut National de la Recherche Agronomique (INRA)
- F-35042 Rennes
| | - Maryvonne Pasco
- Agrocampus Ouest
- F-35042 Rennes
- France
- Institut National de la Recherche Agronomique (INRA)
- F-35042 Rennes
| | - Catherine Guérin-Dubiard
- Agrocampus Ouest
- F-35042 Rennes
- France
- Institut National de la Recherche Agronomique (INRA)
- F-35042 Rennes
| | - Francois Husson
- Agrocampus Ouest
- Applied Mathematics Department
- F-35042 Rennes
- France
| | - Francoise Nau
- Agrocampus Ouest
- F-35042 Rennes
- France
- Institut National de la Recherche Agronomique (INRA)
- F-35042 Rennes
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16
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Goszczyński TM, Kowalski K, Leśnikowski ZJ, Boratyński J. Solid state, thermal synthesis of site-specific protein-boron cluster conjugates and their physicochemical and biochemical properties. Biochim Biophys Acta Gen Subj 2014; 1850:411-8. [PMID: 25445715 DOI: 10.1016/j.bbagen.2014.11.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 11/07/2014] [Accepted: 11/14/2014] [Indexed: 12/25/2022]
Abstract
BACKGROUND Boron clusters represent a vast family of boron-rich compounds with extraordinary properties that provide the opportunity of exploitation in different areas of chemistry and biology. In addition, boron clusters are clinically used in boron neutron capture therapy (BNCT) of tumors. In this paper, a novel, in solid state (solvent free), thermal method for protein modification with boron clusters has been proposed. METHODS The method is based on a cyclic ether ring opening in oxonium adduct of cyclic ether and a boron cluster with nucleophilic centers of the protein. Lysozyme was used as the model protein, and the physicochemical and biological properties of the obtained conjugates were characterized. RESULTS The main residues of modification were identified as arginine-128 and threonine-51. No significant changes in the secondary or tertiary structures of the protein after tethering of the boron cluster were found using mass spectrometry and circular dichroism measurements. However, some changes in the intermolecular interactions and hydrodynamic and catalytic properties were observed. CONCLUSIONS To the best of our knowledge, we have described the first example of an application of cyclic ether ring opening in the oxonium adducts of a boron cluster for protein modification. In addition, a distinctive feature of the proposed approach is performing the reaction in solid state and at elevated temperature. GENERAL SIGNIFICANCE The proposed methodology provides a new route to protein modification with boron clusters and extends the range of innovative molecules available for biological and medical testing.
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Affiliation(s)
- Tomasz M Goszczyński
- "Neolek" Laboratory of Biomedical Chemistry, Department of Experimental Oncology, Institute of Immunology and Experimental Therapy, PAS, 12 Rudolf Weigl St., 53-114 Wrocław, Poland.
| | - Konrad Kowalski
- "Neolek" Laboratory of Biomedical Chemistry, Department of Experimental Oncology, Institute of Immunology and Experimental Therapy, PAS, 12 Rudolf Weigl St., 53-114 Wrocław, Poland
| | - Zbigniew J Leśnikowski
- Laboratory of Molecular Virology and Biological Chemistry, Institute of Medical Biology, PAS, 106 Lodowa St., 93-232 Łódź, Poland.
| | - Janusz Boratyński
- "Neolek" Laboratory of Biomedical Chemistry, Department of Experimental Oncology, Institute of Immunology and Experimental Therapy, PAS, 12 Rudolf Weigl St., 53-114 Wrocław, Poland
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17
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Derde M, Nau F, Lechevalier V, Guérin-Dubiard C, Paboeuf G, Jan S, Baron F, Gautier M, Vié V. Native lysozyme and dry-heated lysozyme interactions with membrane lipid monolayers: lateral reorganization of LPS monolayer, model of the Escherichia coli outer membrane. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1848:174-83. [PMID: 25450345 DOI: 10.1016/j.bbamem.2014.10.026] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 09/26/2014] [Accepted: 10/20/2014] [Indexed: 01/24/2023]
Abstract
Lysozyme is mainly described active against Gram-positive bacteria, but is also efficient against some Gram-negative species. Especially, it was recently demonstrated that lysozyme disrupts Escherichia coli membranes. Moreover, dry-heating changes the physicochemical properties of the protein and increases the membrane activity of lysozyme. In order to elucidate the mode of insertion of lysozyme into the bacterial membrane, the interaction between lysozyme and a LPS monolayer mimicking the E. coli outer membrane has been investigated by tensiometry, ellipsometry, Brewster angle microscopy and atomic force microscopy. It was thus established that lysozyme has a high affinity for the LPS monolayer, and is able to insert into the latter as long as polysaccharide moieties are present, causing reorganization of the LPS monolayer. Dry-heating increases the lysozyme affinity for the LPS monolayer and its insertion capacity; the resulting reorganization of the LPS monolayer is different and more drastic than with the native protein.
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Affiliation(s)
- Melanie Derde
- Agrocampus Ouest, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France; INRA, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France.
| | - Françoise Nau
- Agrocampus Ouest, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France; INRA, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France
| | - Valérie Lechevalier
- Agrocampus Ouest, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France; INRA, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France
| | - Catherine Guérin-Dubiard
- Agrocampus Ouest, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France; INRA, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France
| | - Gilles Paboeuf
- Université de Rennes 1, Institut de Physique de Rennes, UMR6251, CNRS, F-35042 Rennes, France
| | - Sophie Jan
- Agrocampus Ouest, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France; INRA, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France
| | - Florence Baron
- Agrocampus Ouest, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France; INRA, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France
| | - Michel Gautier
- Agrocampus Ouest, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France; INRA, UMR1253 Science et Technologie du Lait et de l'Oeuf, F-35042 Rennes, France
| | - Véronique Vié
- Université de Rennes 1, Institut de Physique de Rennes, UMR6251, CNRS, F-35042 Rennes, France.
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18
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Wawer J, Krakowiak J, Szociński M, Lustig Z, Olszewski M, Szostak K. Inhibition of amyloid fibril formation of hen egg white lysozyme by trimethylamine N-oxide at low pH. Int J Biol Macromol 2014; 70:214-21. [DOI: 10.1016/j.ijbiomac.2014.06.057] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 06/20/2014] [Accepted: 06/30/2014] [Indexed: 10/25/2022]
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19
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Klaene JJ, Ni W, Alfaro JF, Zhou ZS. Detection and quantitation of succinimide in intact protein via hydrazine trapping and chemical derivatization. J Pharm Sci 2014; 103:3033-42. [PMID: 25043726 DOI: 10.1002/jps.24074] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2014] [Revised: 06/01/2014] [Accepted: 06/04/2014] [Indexed: 12/19/2022]
Abstract
The formation of aspartyl succinimide is a common post-translational modification of protein pharmaceuticals under acidic conditions. We present a method to detect and quantitate succinimide in intact protein via hydrazine trapping and chemical derivatization. Succinimide, which is labile under typical analytical conditions, is first trapped with hydrazine to form stable hydrazide and can be directly analyzed by mass spectrometry. The resulting aspartyl hydrazide can be selectively derivatized by various tags, such as fluorescent rhodamine sulfonyl chloride that absorbs strongly in the visible region (570 nm). Our tagging strategy allows the labeled protein to be analyzed by orthogonal methods, including HPLC-UV-Vis, liquid chromatography mass spectrometry (LC-MS), and SDS-PAGE coupled with fluorescence imaging. A unique advantage of our method is that variants containing succinimide, after derivatization, can be readily resolved via either affinity enrichment or chromatographic separation. This allows further investigation of individual factors in a complex protein mixture that affect succinimide formation. Some additional advantages are imparted by fluorescence labeling including the facile detection of the intact protein without proteolytic digestion to peptides; and high sensitivity, for example, without optimization, 0.41% succinimide was readily detected. As such, our method should be useful for rapid screening, optimization of formulation conditions, and related processes relevant to protein pharmaceuticals.
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Affiliation(s)
- Joshua J Klaene
- Barnett Institute of Chemical and Biological Analysis, Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts, 02115
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20
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Ionic liquid 1-ethyl-3-methylimidazolium acetate: an attractive solvent for native chemical ligation of peptides. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.04.102] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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21
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Derde M, Guérin-Dubiard C, Lechevalier V, Cochet MF, Jan S, Baron F, Gautier M, Vié V, Nau F. Dry-heating of lysozyme increases its activity against Escherichia coli membranes. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:1692-1700. [PMID: 24450740 DOI: 10.1021/jf405155p] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
For food as well as for medical applications, there is a growing interest in novel and natural antimicrobial molecules. Lysozyme is a promising candidate for the development of such molecules. This protein is largely studied and known for its muramidase activity against Gram-positive bacteria, but it also shows antimicrobial activity against Gram-negative bacteria, especially when previously modified. In this study, the activity of dry-heated lysozyme (DH-L) against Escherichia coli has been investigated and compared to that of native lysozyme (N-L). Whereas N-L only delays bacterial growth, DH-L causes an early-stage population decrease. The accompanying membrane permeabilization suggests that DH-L induces either larger pores or more pores in the outer membrane as compared to N-L, as well as more ion channels in the inner membrane. The strong morphological modifications observed by optical microscopy and atomic force microscopy when E. coli cells are treated with DH-L are consistent with the suggested disturbances of membrane integrity. The higher hydrophobicity, surface activity, and positive charge induced by dry-heating could be responsible for the increased activity of DH-L on the E. coli membranes.
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Affiliation(s)
- Melanie Derde
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf , F-35042 Rennes, France
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22
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Different analytical approaches in assessing antibacterial activity and the purity of commercial lysozyme preparations for dairy application. Molecules 2013; 18:6008-20. [PMID: 23698052 PMCID: PMC6269954 DOI: 10.3390/molecules18056008] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Revised: 05/16/2013] [Accepted: 05/16/2013] [Indexed: 11/17/2022] Open
Abstract
Hen egg-white lysozyme (LSZ) is currently used in the food industry to limit the proliferation of lactic acid bacteria spoilage in the production of wine and beer, and to inhibit butyric acid fermentation in hard and extra hard cheeses (late blowing) caused by the outgrowth of clostridial spores. The aim of this work was to evaluate how the enzyme activity in commercial preparations correlates to the enzyme concentration and can be affected by the presence of process-related impurities. Different analytical approaches, including turbidimetric assay, SDS-PAGE and HPLC were used to analyse 17 commercial preparations of LSZ marketed in different countries. The HPLC method adopted by ISO allowed the true LSZ concentration to be determined with accuracy. The turbidimetric assay was the most suitable method to evaluate LSZ activity, whereas SDS-PAGE allowed the presence of other egg proteins, which are potential allergens, to be detected. The analytical results showed that the purity of commercially available enzyme preparations can vary significantly, and evidenced the effectiveness of combining different analytical approaches in this type of control.
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23
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Gulzar M, Bouhallab S, Jardin J, Briard-Bion V, Croguennec T. Structural consequences of dry heating on alpha-lactalbumin and beta-lactoglobulin at pH 6.5. Food Res Int 2013. [DOI: 10.1016/j.foodres.2013.02.025] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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24
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Kumar M, Chatterjee A, Khedkar AP, Kusumanchi M, Adhikary L. Mass spectrometric distinction of in-source and in-solution pyroglutamate and succinimide in proteins: a case study on rhG-CSF. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2013; 24:202-212. [PMID: 23283728 DOI: 10.1007/s13361-012-0531-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Revised: 10/17/2012] [Accepted: 10/29/2012] [Indexed: 06/01/2023]
Abstract
Formation of cyclic intermediates involving water or ammonia loss is a common occurrence in any reaction involving terminal amines or hydroxyl group containing species. Proteins that have both these functional groups in abundance are no exception, and presence of amino acids such as asparagine, glutamines, aspartic acids, and glutamic acids aid in formation of such intermediates. In the biopharma scenario, such intermediates lead to product- or process-related impurities that might be immunogenic. Mass spectroscopy is a powerful technique that is used to decipher the presence and physicochemical characteristics of such impurities. However, such intermediates can also form in situ during mass spectrometric analysis. We present here the detection of in-source and in-solution formation of succinimide and pyroglutamate in the protein granulocyte colony stimulating factor. We also propose an approach for quick differentiation of such in-situ species from the tangible impurities. We believe that this will not only reduce the time spent in unambiguous identification of succinimide- and/or pyroglutamate-related impurity in bio-pharmaceutics but also provide a platform for similar studies on other impurities that may form due to stabilized intermediates.
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Affiliation(s)
- Mukesh Kumar
- Molecular Characterization Laboratory, Biocon Research Ltd., Bangalore, Karnataka, India
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25
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The physicochemical parameters during dry heating strongly influence the gelling properties of whey proteins. J FOOD ENG 2012. [DOI: 10.1016/j.jfoodeng.2012.05.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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26
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DeHart MP, Anderson BD. Effects of Water and Polymer Content on Covalent Amide-Linked Adduct Formation in Peptide-Containing Amorphous Lyophiles. J Pharm Sci 2012; 101:3142-56. [DOI: 10.1002/jps.23092] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Revised: 01/16/2012] [Accepted: 02/07/2012] [Indexed: 11/08/2022]
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27
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Ding F, Li XN, Diao JX, Sun Y, Zhang L, Ma L, Yang XL, Zhang L, Sun Y. Potential toxicity and affinity of triphenylmethane dye malachite green to lysozyme. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2012; 78:41-49. [PMID: 22236952 DOI: 10.1016/j.ecoenv.2011.11.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2011] [Revised: 10/31/2011] [Accepted: 11/14/2011] [Indexed: 05/31/2023]
Abstract
Malachite green is a triphenylmethane dye that is used extensively in many industrial and aquacultural processes, generating environmental concerns and health problems to human being. In this contribution, the complexation between lysozyme and malachite green was verified by means of computer-aided molecular modeling, steady state and time-resolved fluorescence, and circular dichroism (CD) approaches. The precise binding patch of malachite green in lysozyme has been identified from molecular modeling and ANS displacement, Trp-62, Trp-63, and Trp-108 residues of lysozyme were earmarked to possess high-affinity for this dye, the principal forces in the lysozyme-malachite green adduct are hydrophobic and π-π interactions. Steady state fluorescence proclaimed the complex of malachite green with lysozyme yields quenching through static type, which substantiates time-resolved fluorescence measurements that lysozyme-malachite green conjugation formation has an affinity of 10(3)M(-1). Moreover, via molecular modeling and also CD data, we can safely arrive at a conclusion that the polypeptide chain of lysozyme partially destabilized upon complexation with malachite green. The data emerged here will help to further understand the toxicological action of malachite green in human body.
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Affiliation(s)
- Fei Ding
- Department of Chemistry, China Agricultural University, Beijing 100193, China
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28
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Dehart MP, Anderson BD. A mechanism-based kinetic analysis of succinimide-mediated deamidation, racemization, and covalent adduct formation in a model peptide in amorphous lyophiles. J Pharm Sci 2012; 101:3096-109. [PMID: 22271437 DOI: 10.1002/jps.23061] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Revised: 12/01/2011] [Accepted: 01/04/2012] [Indexed: 11/06/2022]
Abstract
The succinimide intermediate generated during deamidation of asparagine-containing peptides and proteins has been implicated as having a role in the formation of multiple types of degradants in addition to hydrolysis products, including racemization products and, more recently, amide-linked, nonreducible protein and peptide aggregates. The formation of alternative degradants may be particularly important in solid-state formulations. This study quantitatively examines the role of the succinimide intermediate in hydrolysis, racemization, and covalent, amide-linked adduct formation in amorphous lyophiles. The degradation of a model peptide, Gly-Phe-L-Asn-Gly, and its L- or D-succinimide intermediates were examined in lyophiles containing hydroxypropyl methylcellulose and varying amounts of excess Gly-Val. Disappearance of the starting reactants and formation of up to 10 degradants were monitored when lyophiles were exposed to either 27°C/40% relative humidity (RH) or 40°C/75 RH using a stability indicating high-performance liquid chromatography method. Terminal degradant profiles were the same when the starting reactant was either Gly-Phe-L-Asn-Gly or its succinimide intermediate. Nucleophilic attack occurred preferentially at the α-carbonyl of the succinimide intermediate at ratios of approximately 2:1 for both water and the N-terminus of Gly-Val as the attacking nucleophiles. A mechanism-based kinetic model analysis indicates that hydrolysis, racemization, and covalent, amide-linked adduct formation all proceed via the succinimide intermediate.
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Affiliation(s)
- Michael P Dehart
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536-0082, USA
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29
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Desfougères Y, Saint-Jalmes A, Salonen A, Vié V, Beaufils S, Pezennec S, Desbat B, Lechevalier V, Nau F. Strong improvement of interfacial properties can result from slight structural modifications of proteins: the case of native and dry-heated lysozyme. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:14947-14957. [PMID: 22040020 DOI: 10.1021/la203485y] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Identification of the key physicochemical parameters of proteins that determine their interfacial properties is still incomplete and represents a real stake challenge, especially for food proteins. Many studies have thus consisted in comparing the interfacial behavior of different proteins, but it is difficult to draw clear conclusions when the molecules are completely different on several levels. Here the adsorption process of a model protein, the hen egg-white lysozyme, and the same protein that underwent a thermal treatment in the dry state, was characterized. The consequences of this treatment have been previously studied: net charge and hydrophobicity increase and lesser protein stability, but no secondary and tertiary structure modification (Desfougères, Y.; Jardin, J.; Lechevalier, V.; Pezennec, S.; Nau, F. Biomacromolecules 2011, 12, 156-166). The present study shows that these slight modifications dramatically increase the interfacial properties of the protein, since the adsorption to the air-water interface is much faster and more efficient (higher surface pressure). Moreover, a thick and strongly viscoelastic multilayer film is created, while native lysozyme adsorbs in a fragile monolayer film. Another striking result is that completely different behaviors were observed between two molecular species, i.e., native and native-like lysozyme, even though these species could not be distinguished by usual spectroscopic methods. This suggests that the air-water interface could be considered as a useful tool to reveal very subtle differences between protein molecules.
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30
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Subirós-Funosas R, El-Faham A, Albericio F. Aspartimide formation in peptide chemistry: occurrence, prevention strategies and the role of N-hydroxylamines. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.08.046] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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31
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Dehart MP, Anderson BD. Kinetics and mechanisms of deamidation and covalent amide-linked adduct formation in amorphous lyophiles of a model asparagine-containing Peptide. Pharm Res 2011; 29:2722-37. [PMID: 22006203 DOI: 10.1007/s11095-011-0591-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Accepted: 09/13/2011] [Indexed: 12/23/2022]
Abstract
PURPOSE Asparagine containing peptides and proteins undergo deamidation via a succinimide intermediate. This study examines the role of the succinimide in the formation of covalent, amide-linked adducts in amorphous peptide formulations. METHODS Stability studies of a model peptide, Gly-Phe-L-Asn-Gly, were performed in lyophiles containing an excess of Gly-Val at 'pH' 9.5 and 40°C/40% RH. Reactant disappearance and the formation of ten different degradants were monitored by HPLC. Mechanism-based kinetic models were used to generate rate constants from the concentration vs. time profiles. RESULTS Deamidation of Gly-Phe-L-Asn-Gly in lyophiles resulted in L- and D-aspartyl and isoaspartyl-containing peptides and four amide-linked adducts between the succinimide and Gly-Val. The kinetic analysis demonstrated competition between water and terminal amino groups in Gly-Val for the succinimide. The extent of covalent adduct formation was dependent on dilution effects due to its second order rate law. CONCLUSION The cyclic imide formed during deamidation of asparagine containing peptides in lyophiles can also lead to covalent adducts due to reaction with other neighboring peptides. A reaction model assuming a central role for the succinimide in the formation both hydrolysis products and covalent adducts was quantitatively consistent with the kinetic data. This mechanism may contribute to the presence of covalent, non-reducible aggregates in lyophilized peptide formulations.
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Affiliation(s)
- Michael P Dehart
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, A323A ASTeCC Bldg., Lexington, Kentucky, 40536-0082, USA
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32
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Muhammad G, Saïd B, Thomas C. Structural consequences of dry heating on Beta-Lactoglobulin under controlled pH. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.profoo.2011.09.060] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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