1
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Arakawa T, Tomioka Y, Akuta T, Shiraki K. The contrasting roles of co-solvents in protein formulations and food products. Biophys Chem 2024; 312:107282. [PMID: 38944944 DOI: 10.1016/j.bpc.2024.107282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 05/29/2024] [Accepted: 06/14/2024] [Indexed: 07/02/2024]
Abstract
Protein aggregation is a major hurdle in developing biopharmaceuticals, in particular protein formulation area, but plays a pivotal role in food products. Co-solvents are used to suppress protein aggregation in pharmaceutical proteins. On the contrary, aggregation is encouraged in the process of food product making. Thus, it is expected that co-solvents play a contrasting role in biopharmaceutical formulation and food products. Here, we show several examples that utilize co-solvents, e.g., salting-out salts, sugars, polyols and divalent cations in promoting protein-protein interactions. The mechanisms of co-solvent effects on protein aggregation and solubility have been studied on aqueous protein solution and applied to develop pharmaceutical formulation based on the acquired scientific knowledge. On the contrary, co-solvents have been used in food industries based on empirical basis. Here, we will review the mechanisms of co-solvent effects on protein-protein interactions that can be applied to both pharmaceutical and food industries and hope to convey knowledge acquired through research on co-solvent interactions in aqueous protein solution and formulation to those involved in food science and provide those involved in protein solution research with the observations on aggregation behavior of food proteins.
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Affiliation(s)
- Tsutomu Arakawa
- Alliance Protein Laboratories, 13380 Pantera Road, San Diego, CA 92130, USA.
| | - Yui Tomioka
- Research and Development Division, Kyokuto Pharmaceutical Industrial Co., Ltd, 3333-26, Aza-Asayama, Kamitezuna Tahahagi, Ibaraki 318-0004, Japan
| | - Teruo Akuta
- Research and Development Division, Kyokuto Pharmaceutical Industrial Co., Ltd, 3333-26, Aza-Asayama, Kamitezuna Tahahagi, Ibaraki 318-0004, Japan
| | - Kentaro Shiraki
- Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
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2
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Tanimoto S, Okumura H. Why Is Arginine the Only Amino Acid That Inhibits Polyglutamine Monomers from Taking on Toxic Conformations? ACS Chem Neurosci 2024; 15:2925-2935. [PMID: 39009034 DOI: 10.1021/acschemneuro.4c00276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/17/2024] Open
Abstract
Polyglutamine (polyQ) diseases are devastating neurodegenerative disorders characterized by abnormal expansion of glutamine repeats within specific proteins. The aggregation of polyQ proteins is a critical pathological hallmark of these diseases. Arginine was identified as a promising inhibitory compound because it prevents polyQ-protein monomers from forming intra- and intermolecular β-sheet structures and hinders polyQ proteins from aggregating to form oligomers. Such an aggregation inhibitory effect was not observed in other amino acids. However, the underlying molecular mechanism of the aggregation inhibition and the factors that differentiate arginine from other amino acids, in terms of the inhibition of the polyQ-protein aggregation, remain poorly understood. Here, we performed replica-permutation molecular dynamics simulations to elucidate the molecular mechanism by which arginine inhibits the formation of the intramolecular β-sheet structure of a polyQ monomer. We found that the intramolecular β-sheet structure with more than four β-bridges of the polyQ monomer with arginine is more unstable than without any ligand and with lysine. We also found that arginine has 1.6-2.1 times more contact with polyQ than lysine. In addition, we revealed that arginine forms more hydrogen bonds with the main chain of the polyQ monomer than lysine. More hydrogen bonds formed between arginine and polyQ inhibit polyQ from forming the long intramolecular β-sheet structure. It is known that intramolecular β-sheet structure enhances intermolecular β-sheet structure between proteins. These effects are thought to be the reason for the inhibition of polyQ aggregation. This study provides insights into the molecular events underlying arginine's inhibition of polyQ-protein aggregation.
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Affiliation(s)
- Shoichi Tanimoto
- Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences, Okazaki 444-8787, Aichi, Japan
| | - Hisashi Okumura
- Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences, Okazaki 444-8787, Aichi, Japan
- National Institutes of Natural Sciences, Institute for Molecular Science, Okazaki 444-8787, Aichi, Japan
- Graduate Institute for Advanced Studies, SOKENDAI, Okazaki 444-8787, Aichi, Japan
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3
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Akbarian M, Kianpour M, Tayebi L. Fabricating Multiphasic Angiogenic Scaffolds Using Amyloid/Roxadustat-Assisted High-Temperature Protein Printing. ACS APPLIED MATERIALS & INTERFACES 2024; 16:36983-37006. [PMID: 38953207 DOI: 10.1021/acsami.4c06207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/03/2024]
Abstract
Repairing multiphasic defects is cumbersome. This study presents new soft and hard scaffold designs aimed at facilitating the regeneration of multiphasic defects by enhancing angiogenesis and improving cell attachment. Here, the nonimmunogenic, nontoxic, and cost-effective human serum albumin (HSA) fibril (HSA-F) was used to fabricate thermostable (up to 90 °C) and hard printable polymers. Additionally, using a 10.0 mg/mL HSA-F, an innovative hydrogel was synthesized in a mixture with 2.0% chitosan-conjugated arginine, which can gel in a cell-friendly and pH physiological environment (pH 7.4). The presence of HSA-F in both hard and soft scaffolds led to an increase in significant attachment of the scaffolds to the human periodontal ligament fibroblast (PDLF), human umbilical vein endothelial cell (HUVEC), and human osteoblast. Further studies showed that migration (up to 157%), proliferation (up to 400%), and metabolism (up to 210%) of these cells have also improved in the direction of tissue repair. By examining different in vitro and ex ovo experiments, we observed that the final multiphasic scaffold can increase blood vessel density in the process of per-vascularization as well as angiogenesis. By providing a coculture environment including PDLF and HUVEC, important cross-talk between these two cells prevails in the presence of roxadustat drug, a proangiogenic in this study. In vitro and ex ovo results demonstrated significant enhancements in the angiogenic response and cell attachment, indicating the effectiveness of the proposed design. This approach holds promise for the regeneration of complex tissue defects by providing a conducive environment for vascularization and cellular integration, thus promoting tissue healing.
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Affiliation(s)
- Mohsen Akbarian
- Marquette University School of Dentistry, Milwaukee, Wisconsin 53233, United States
| | - Maryam Kianpour
- Marquette University School of Dentistry, Milwaukee, Wisconsin 53233, United States
| | - Lobat Tayebi
- Marquette University School of Dentistry, Milwaukee, Wisconsin 53233, United States
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4
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Pan F, Wu X, Gong L, Xu H, Yuan Y, Lu J, Zhang T, Liu J, Shang X. Dextran sulfate acting as a chaperone-like component on inhibition of amorphous aggregation and enhancing thermal stability of ovotransferrin. Food Chem 2024; 445:138720. [PMID: 38359570 DOI: 10.1016/j.foodchem.2024.138720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 01/25/2024] [Accepted: 02/06/2024] [Indexed: 02/17/2024]
Abstract
The tendency of ovotransferrin (OVT) to unfold and aggregate under 60 °C severely restricted sterilization temperature during egg processing. Searching for efficient strategies to improve OVT thermal stability is essential for improving egg product quality and processing suitability. Here, we investigated the effect of sulfate polysaccharide (dextran sulfate, DS) on heat-induced aggregation of OVT. We found that DS can effectively suppress amorphous aggregation of OVT at pH 7.0 after heating. Strikingly, the addition of 5 µM DS fully suppressed insoluble aggregates formation of 0.5 mg/mL OVT. Structure analysis confirmed that DS preserves nearly the entire secondary and tertiary structure of OVT during heating. The steric hindrance effect arising from strong electrostatic interactions between OVT and DS, coupled with reduced OVT hydrophobicity, is the underlying mechanism in suppressing protein-protein interactions, thus enhancing thermal stability. These findings suggest DS could act as protein stabilizers and chaperones, enhancing the thermostability of heat-sensitive proteins.
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Affiliation(s)
- Fengguang Pan
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Xinling Wu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Lingling Gong
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Haojie Xu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Yixin Yuan
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Jinming Lu
- College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Ting Zhang
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Jingbo Liu
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Xiaomin Shang
- Jilin Provincial Key Laboratory of Nutrition and Functional Food, Jilin University, Changchun 130062, PR China; College of Food Science and Engineering, Jilin University, Changchun 130062, PR China.
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5
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Liu ZW, Tang PP, Zhang YX, Cheng JH, Aadil RM, Liu XB. Preventing thermal aggregation of ovalbumin through dielectric-barrier discharge plasma treatment and enhancing its emulsification properties. Int J Biol Macromol 2024; 267:131578. [PMID: 38641267 DOI: 10.1016/j.ijbiomac.2024.131578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 04/06/2024] [Accepted: 04/11/2024] [Indexed: 04/21/2024]
Abstract
The impact of Dielectric-Barrier Discharge (DBD) plasma treatment on the prevention of heat-induced aggregation of Ovalbumin (OVA) and improvement in emulsification properties was investigated. Results highlighted the effective inhibition of thermal aggregation of OVA following exposure to plasma. Structural analysis revealed that the plasma-induced oxidation of sulfhydryl and intermolecular disulfide bonds played a pivotal role in inhibiting the thermal aggregation, considered by Sodium Dodecyl Sulfate Polyacrylamide Gel Electrophoresis (SDS-PAGE), multiplies spectroscopy, and analysis of dynamic exchange of sulfhydryl-disulfide bonds. Meanwhile, the oxidation of exposed hydrophobic sites due to plasma treatment resulted in the transformation of the OVA molecule's surface from hydrophobic to hydrophilic, contributing significantly to the aggregation inhibition. Additionally, compared to an untreated sample of OVA, almost one-fold increase in emulsifying ability (EAI) and 1.5-fold in emulsifying stability (ESI) was observed after 4 min of plasma treatment. These findings demonstrated that plasma treatment not only enhanced the thermal stability of OVA, but also improved its emulsification properties.
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Affiliation(s)
- Zhi-Wei Liu
- College of Food Science and Technology, Hunan Agricultural University, Changsha 410128, China.
| | - Pan-Pan Tang
- College of Food Science and Technology, Hunan Agricultural University, Changsha 410128, China
| | - Yi-Xuan Zhang
- College of Food Science and Technology, Hunan Agricultural University, Changsha 410128, China
| | - Jun-Hu Cheng
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China
| | - Rana Muhammad Aadil
- National Institute of Food Science and Technology, University of Agriculture, Faisalabad 38000, Pakistan.
| | - Xiu-Bin Liu
- College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China.
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6
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Shan L, Huang Y, Zhang J, Su Y, Guo Y. Inhibiting Protein Aggregation Using Cellulose Nanocrystal in MALDI-TOF MS Analysis: Improving the Sensitivity and Repeatability of Intact Protein in Pueraria. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:20146-20154. [PMID: 38060840 DOI: 10.1021/acs.jafc.3c04650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Protein aggregation can induce low sensitivity and poor repeatability of matrix-assisted laser desorption/ionization time-of-fight mass spectrometry (MALDI-TOF MS) analysis for intact protein. Herein, we introduced a strategy to decrease protein aggregation in the sample solution by using cellulose nanocrystal (CNC). The results indicated that protein granule size was effectively reduced by adding CNC to the sample solution. Through MALDI-TOF MS analysis, the signal-to-noise ratio of [M + H]+ peak increased 2-fold, and the detection of limit was <10 μg/mL for intact protein. The CNC also contributed to excellent point-to-point repeatability for MALDI-TOF MS analysis with the coefficient of variation (CV) of 10.0% with CNC vs 48.9% without CNC in Hb solution. Also, the repeatability of Pueraria protein ion signals was improved by using CNC, and the CV with and without CNC was 16.1% and 39.6%, respectively. Moreover, protein ion intensity exhibited great linear relationship (y = 53.04x - 3.474, R2 = 0.9936) with the concentrations (ranging from 0.1 to 10 mg/mL) when using CNC. Further investigation revealed that m/z 19,000 and m/z 21,000 peaks of Pueraria could be used for the adulteration analysis and post-translational modification research, demonstrating our method has the potential for broad applications.
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Affiliation(s)
- Liang Shan
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, PR China
- National Center for Organic Mass Spectrometry in Shanghai, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, PR China
| | - Yiman Huang
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, PR China
- National Center for Organic Mass Spectrometry in Shanghai, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, PR China
| | - Jing Zhang
- National Center for Organic Mass Spectrometry in Shanghai, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, PR China
| | - Yue Su
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, PR China
| | - Yinlong Guo
- National Center for Organic Mass Spectrometry in Shanghai, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, PR China
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7
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Li G, Feng Y, Cui J, Hou Q, Li T, Jia M, Lv Z, Jiang Q, Wang Y, Zhang M, Wang L, Lv Z, Li J, Guo Y, Zhang B. The ionome and proteome landscape of aging in laying hens and relation to egg white quality. SCIENCE CHINA. LIFE SCIENCES 2023; 66:2020-2040. [PMID: 37526911 DOI: 10.1007/s11427-023-2413-4] [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: 04/22/2023] [Accepted: 05/25/2023] [Indexed: 08/02/2023]
Abstract
The ionome is essential for maintaining body function and health status by participating in diverse key biological processes. Nevertheless, the distribution and utilization of ionome among different organs and how aging impacts the ionome leading to a decline in egg white quality remain unknown. Thus, we used inductively coupled plasma mass spectrometry (ICP-MS) to analyze 35 elements and their isotopic contents in eight organs of laying hens at 35, 72, and 100 weeks. Moreover, the magnum proteome, amino acids in egg white, and egg white quality were analyzed in laying hens at three different ages using 4D proteomics techniques, an amino acid analyzer, and an egg quality analyzer. Across the organs, we identified varying distribution patterns among macroelements (Mg24, Ca43/44, K39, and P31), transition metals (Zn64/66, Cu63/65, Fe56/57, and Mn55), and toxic elements (Pb208, Ba137, and Sr86). We observed an organ-specific aging pattern characterized by the accumulation of toxic elements (Pb208, Ba137, and Sr86) and calcification in the small intestine. Additionally, a decrease in the utilization of essential trace elements selenium (Se78/82) and manganese (Mn55) was noted in the oviduct. By analyzing ionome in tandem with egg quality, egg white amino acids, and proteome, we unveiled that the reduction of selenium and manganese concentrations in the magnum during the aging process affected amino acid metabolism, particularly tryptophan metabolism, thereby inhibiting the amino acid synthesis in the magnum. Furthermore, it accelerated the senescence of magnum cells through necroptosis activation, leading to a decline in the albumen secretion function of the magnum and subsequently reducing egg white quality. Overall, this study provides insights into the evolution of 35 elements and their isotopes across 8 organs of laying hens with age. It also reveals the elemental composition, interactions, and utilization patterns of these organs, as well as their correlation with egg white quality. The present study highlights the significance of ionome and offers a comprehensive perspective on the selection of ionome for regulating the aging of laying hens.
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Affiliation(s)
- Guang Li
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing, 100193, China
| | - Yuqing Feng
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing, 100193, China
| | - Jian Cui
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing, 100193, China
| | - Qihang Hou
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing, 100193, China
| | - Tanfang Li
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing, 100193, China
| | - Meiting Jia
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing, 100193, China
| | - Zhengtian Lv
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing, 100193, China
| | - Qiuyu Jiang
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing, 100193, China
| | - Ying Wang
- Sichuan Tieqilishi Industrial Co., Ltd., Mianyang, 621010, China
| | - Ming Zhang
- Sichuan Tieqilishi Industrial Co., Ltd., Mianyang, 621010, China
| | - Lin Wang
- Sichuan Sundaily Farm Ecological Food Co., Ltd., Mianyang, 621010, China
| | - Zengpeng Lv
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing, 100193, China
| | - Junyou Li
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, Ibaraki, 319-0206, Japan
| | - Yuming Guo
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing, 100193, China.
| | - Bingkun Zhang
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing, 100193, China.
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8
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Wang T, Chang C, Cheng W, Gu L, Su Y, Yang Y, Li J. Combined effect of heating and enzymatic hydrolysis on the dispersibility and structure properties of egg white powder. J FOOD ENG 2023. [DOI: 10.1016/j.jfoodeng.2023.111503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
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9
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Heat treatment in the presence of arginine increases the emulsifying properties of soy proteins. Food Chem X 2023; 17:100567. [PMID: 36845474 PMCID: PMC9945471 DOI: 10.1016/j.fochx.2023.100567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 12/21/2022] [Accepted: 01/05/2023] [Indexed: 01/09/2023] Open
Abstract
This study aimed to improve the emulsifying properties of commercial soy protein isolates (CSPIs). CSPIs were thermally denatured without additives (CSPI_H) and with arginine (CSPI_A), urea (CSPI_U), and guanidine hydrochloride (CSPI_G), which improve protein solubility to prevent aggregation. These additives were removed by dialysis, and the samples were lyophilized. CSPI_A resulted in high emulsifying properties. FT-IR analysis showed that the β-sheet content in CSPI_A was reduced compared to that of untreated CSPI (CSPI_F). Fluorescence analysis showed that the tryptophan-derived emission peak of CSPI_A shifted between CSPI_F and CSPI_H which was exposed to hydrophobic amino acid chains with aggregation. As a result, the structure of CSPI_A became moderately unfolded and exposed the hydrophobic amino acid chains without aggregation. The CSPI_A solution had a more reduced oil-water interface tension than other CSPIs. These results support that CSPI_A attaches efficiently to the oil-water interface and produces small, less flocculated emulsions.
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10
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Food protein aggregation and its application. Food Res Int 2022; 160:111725. [DOI: 10.1016/j.foodres.2022.111725] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 06/29/2022] [Accepted: 07/19/2022] [Indexed: 01/31/2023]
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11
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Quantitative proteomics provides a new perspective on the mechanism of network structure depolymerization during egg white thinning. Food Chem 2022; 392:133320. [DOI: 10.1016/j.foodchem.2022.133320] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 05/16/2022] [Accepted: 05/24/2022] [Indexed: 12/11/2022]
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12
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Encapsulation of Bromelain in Combined Sodium Alginate and Amino Acid Carriers: Experimental Design of Simplex-Centroid Mixtures for Digestibility Evaluation. Molecules 2022; 27:molecules27196364. [PMID: 36234901 PMCID: PMC9570880 DOI: 10.3390/molecules27196364] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 09/20/2022] [Accepted: 09/22/2022] [Indexed: 11/16/2022] Open
Abstract
Bromelain has potential as an analgesic, an anti-inflammatory, and in cancer treatments. Despite its therapeutic effects, this protein undergoes denaturation when administered orally. Microencapsulation processes have shown potential in protein protection and as controlled release systems. Thus, this paper aimed to develop encapsulating systems using sodium alginate as a carrier material and positively charged amino acids as stabilizing agents for the controlled release of bromelain in in vitro tests. The systems were produced from the experimental design of centroid simplex mixtures. Characterizations were performed by FTIR showing that bromelain was encapsulated in all systems. XRD analyses showed that the systems are semi-crystalline solids and through SEM analysis the morphology of the formed systems followed a pattern of rough microparticles. The application of statistical analysis showed that the systems presented behavior that can be evaluated by quadratic and special cubic models, with a p-value < 0.05. The interaction between amino acids and bromelain/alginate was evaluated, and free bromelain showed a reduction of 74.0% in protein content and 23.6% in enzymatic activity at the end of gastric digestion. Furthermore, a reduction of 91.6% of protein content and 65.9% of enzymatic activity was observed at the end of intestinal digestion. The Lis system showed better interaction due to the increased stability of bromelain in terms of the amount of proteins (above 63% until the end of the intestinal phase) and the enzymatic activity of 89.3%. Thus, this study proposes the development of pH-controlled release systems aiming at increasing the stability and bioavailability of bromelain in intestinal systems.
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Gao J, Shi Q, Ye Y, Wu Y, Chen H, Tong P. Effects of guar gum or xanthan gum addition in conjunction with pasteurization on liquid egg white. Food Chem 2022; 383:132378. [PMID: 35183963 DOI: 10.1016/j.foodchem.2022.132378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 01/13/2022] [Accepted: 02/05/2022] [Indexed: 11/04/2022]
Abstract
In this study, effects of varying levels of xanthan or guar gum (XG/GG, 0.05%, 0.1%, 0.2%, 0.4% and 0.8%, w/v) on the spatial structure and functional properties of egg white (EW) proteins under different pasteurization conditions of the liquid egg was evaluated. Results showed that XG could bury the aromatic ring residues and reduce the hydrophobicity of protein in EW, whereas GG could only increase the hydrophobicity. With 0.8% GG addition and pasteurization under 60℃/3.5 min, the emulsifying stability of EW was improved by nearly 100%, while with 0.8% XG addition the gel structure of EWwould become porousandloosen under each pasteurization condition. The hardness of EW gels was decreased by 90% when the concentration of XG was 0.4% or 0.8%. According to the results, the concentration of gums and the pasteurization parameters should be considered together when adding gums into the liquid egg products for pasteurization simultaneously.
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Affiliation(s)
- Jinyan Gao
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China; College of Food Science & Technology, Nanchang University, Nanchang 330031, PR China
| | - Qiang Shi
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China; College of Food Science & Technology, Nanchang University, Nanchang 330031, PR China
| | - Yu Ye
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China; College of Food Science & Technology, Nanchang University, Nanchang 330031, PR China
| | - Yong Wu
- Sino-German Joint Research Institute (Jiangxi-OAI), Nanchang University, Nanchang 330047, PR China
| | - Hongbing Chen
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China; Sino-German Joint Research Institute (Jiangxi-OAI), Nanchang University, Nanchang 330047, PR China
| | - Ping Tong
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China.
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14
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Zhang T, Yuan Y, Chai J, Wu X, Saini RK, Liu J, Shang X. How does dextran sulfate promote the egg white protein to form transparent hydrogel?the gelation mechanism and molecular force changes. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.107901] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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15
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Mori W, Kawakami R, Niko Y, Haruta T, Imamura T, Shiraki K, Zako T. Differences in interaction lead to the formation of different types of insulin amyloid. Sci Rep 2022; 12:8556. [PMID: 35595809 PMCID: PMC9123177 DOI: 10.1038/s41598-022-12212-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 05/04/2022] [Indexed: 11/25/2022] Open
Abstract
Insulin balls, localized insulin amyloids formed at the site of repeated insulin injections in patients with diabetes, cause poor glycemic control and cytotoxicity. Our previous study has shown that insulin forms two types of amyloids; toxic amyloid formed from the intact insulin ((i)-amyloid) and less-toxic amyloid formed in the presence of the reducing reagent TCEP ((r)-amyloid), suggesting insulin amyloid polymorphism. However, the differences in the formation mechanism and cytotoxicity expression are still unclear. Herein, we demonstrate that the liquid droplets, which are stabilized by electrostatic interactions, appear only in the process of toxic (i)-amyloid formation, but not in the less-toxic (r)-amyloid formation process. The effect of various additives such as arginine, 1,6-hexanediol, and salts on amyloid formation was also examined to investigate interactions that are important for amyloid formation. Our results indicate that the maturation processes of these two amyloids were significantly different, whereas the nucleation by hydrophobic interactions was similar. These results also suggest the difference in the formation mechanism of two different insulin amyloids is attributed to the difference in the intermolecular interactions and could be correlated with the cytotoxicity.
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Affiliation(s)
- Wakako Mori
- Department of Chemistry and Biology, Graduate School of Science and Engineering, Ehime University, Ehime, Japan
| | - Ryosuke Kawakami
- Department of Molecular Medicine for Pathogenesis, Graduate School of Medicine, Ehime University, Ehime, Japan
| | - Yosuke Niko
- Research and Education Faculty, Multidisciplinary Science Cluster, Interdisciplinary Science Unit, Kochi University, Kochi, Japan
| | | | - Takeshi Imamura
- Department of Molecular Medicine for Pathogenesis, Graduate School of Medicine, Ehime University, Ehime, Japan
| | - Kentaro Shiraki
- Faculty of Pure and Applied Sciences, University of Tsukuba, Ibaraki, Japan
| | - Tamotsu Zako
- Department of Chemistry and Biology, Graduate School of Science and Engineering, Ehime University, Ehime, Japan.
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Svobodová J, Kreisinger J, Gvoždíková Javůrková V. Temperature-induced changes in egg white antimicrobial concentrations during pre-incubation do not influence bacterial trans-shell penetration but do affect hatchling phenotype in Mallards. PeerJ 2021; 9:e12401. [PMID: 34824913 PMCID: PMC8590799 DOI: 10.7717/peerj.12401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 10/06/2021] [Indexed: 01/10/2023] Open
Abstract
Microbiome formation and assemblage are essential processes influencing proper embryonal and early-life development in neonates. In birds, transmission of microbes from the outer environment into the egg’s interior has been found to shape embryo viability and hatchling phenotype. However, microbial transmission may be affected by egg-white antimicrobial proteins (AMPs), whose concentration and antimicrobial action are temperature-modulated. As both partial incubation and clutch covering with nest-lining feathers during the pre-incubation period can significantly alter temperature conditions acting on eggs, we experimentally investigated the effects of these behavioural mechanisms on concentrations of both the primary and most abundant egg-white AMPs (lysozyme and avidin) using mallard (Anas platyrhychos) eggs. In addition, we assessed whether concentrations of egg-white AMPs altered the probability and intensity of bacterial trans-shell penetration, thereby affecting hatchling morphological traits in vivo. We observed higher concentrations of lysozyme in partially incubated eggs. Clutch covering with nest-lining feathers had no effect on egg-white AMP concentration and we observed no association between concentration of egg-white lysozyme and avidin with either the probability or intensity of bacterial trans-shell penetration. The higher egg-white lysozyme concentration was associated with decreased scaled body mass index of hatchlings. These outcomes demonstrate that incubation prior to clutch completion in precocial birds can alter concentrations of particular egg-white AMPs, though with no effect on bacterial transmission into the egg in vivo. Furthermore, a higher egg white lysozyme concentration compromised hatchling body condition, suggesting a potential growth-regulating role of lysozyme during embryogenesis in precocial birds.
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Affiliation(s)
- Jana Svobodová
- Faculty of Environmental Sciences, Department of Ecology, Czech University of Life Sciences, Prague, Suchdol, Czech Republic
| | - Jakub Kreisinger
- Faculty of Science, Department of Zoology, Charles University Prague, Prague, Czech Republic
| | - Veronika Gvoždíková Javůrková
- Institute of Vertebrate Biology of the Czech Academy of Sciences, Brno, Czech Republic.,Faculty of Agrobiology, Food and Natural Resources, Department of Animal Science, Czech University of Life Sciences, Prague, Suchdol, Czech Republic
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Wang X, Wei Z, Xue C. The past and future of ovotransferrin: Physicochemical properties, assembly and applications. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2021.07.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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N-Acetylated-L-arginine (NALA) is an enhanced protein aggregation suppressor under interfacial stresses and elevated temperature for protein liquid formulations. Int J Biol Macromol 2020; 166:654-664. [PMID: 33137385 DOI: 10.1016/j.ijbiomac.2020.10.223] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 10/19/2020] [Accepted: 10/28/2020] [Indexed: 12/15/2022]
Abstract
Even though arginine hydrochloride has been recognized as a protein aggregation suppressor in the biopharmaceutical industry, its use has been questioned due to decreasing transition unfolding temperatures (Tm). Four compounds were designed to enhance the role of arginine by changing the length of the carbon chain with removal or N-acetylation of α-amino group. Biophysical properties were observed by differential scanning calorimetry (DSC), dynamic light scattering (DLS), size-exclusion chromatography (SEC), and flow imaging (FI). N-Acetyl-L-arginine (NALA) performed the best at minimizing decrease in Tm with arginine at different pH. NALA also demonstrated relatively higher colloidal stability than arginine hydrochloride, especially in the acidic pH, thereby reducing agitation stress of IgG. Moreover, NALA exhibited a cooperative effect with commercially used glycine buffer for IVIG to maintain the monomer contents with almost no change and suppressed larger particle formation after agitation with heat. The study concludes that the decreasing Tm of proteins by arginine hydrochloride is due to amide group in the α-carbon chain. Moreover, chemical modification on the group compared to removing it will be a breakthrough of arginine's limitations and optimize storage stability of protein therapeutics.
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Shimizu T, Ding W, Kameta N. Soft-Matter Nanotubes: A Platform for Diverse Functions and Applications. Chem Rev 2020; 120:2347-2407. [PMID: 32013405 DOI: 10.1021/acs.chemrev.9b00509] [Citation(s) in RCA: 103] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Self-assembled organic nanotubes made of single or multiple molecular components can be classified into soft-matter nanotubes (SMNTs) by contrast with hard-matter nanotubes, such as carbon and other inorganic nanotubes. To date, diverse self-assembly processes and elaborate template procedures using rationally designed organic molecules have produced suitable tubular architectures with definite dimensions, structural complexity, and hierarchy for expected functions and applications. Herein, we comprehensively discuss every functions and possible applications of a wide range of SMNTs as bulk materials or single components. This Review highlights valuable contributions mainly in the past decade. Fifteen different families of SMNTs are discussed from the viewpoints of chemical, physical, biological, and medical applications, as well as action fields (e.g., interior, wall, exterior, whole structure, and ensemble of nanotubes). Chemical applications of the SMNTs are associated with encapsulating materials and sensors. SMNTs also behave, while sometimes undergoing morphological transformation, as a catalyst, template, liquid crystal, hydro-/organogel, superhydrophobic surface, and micron size engine. Physical functions pertain to ferro-/piezoelectricity and energy migration/storage, leading to the applications to electrodes or supercapacitors, and mechanical reinforcement. Biological functions involve artificial chaperone, transmembrane transport, nanochannels, and channel reactors. Finally, medical functions range over drug delivery, nonviral gene transfer vector, and virus trap.
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Affiliation(s)
- Toshimi Shimizu
- Nanomaterials Research Institute, Department of Materials and Chemistry , National Institute of Advanced Industrial Science and Technology , Tsukuba Central 5, 1-1-1 Higashi , Tsukuba , Ibaraki 305-8565 , Japan
| | - Wuxiao Ding
- Nanomaterials Research Institute, Department of Materials and Chemistry , National Institute of Advanced Industrial Science and Technology , Tsukuba Central 5, 1-1-1 Higashi , Tsukuba , Ibaraki 305-8565 , Japan
| | - Naohiro Kameta
- Nanomaterials Research Institute, Department of Materials and Chemistry , National Institute of Advanced Industrial Science and Technology , Tsukuba Central 5, 1-1-1 Higashi , Tsukuba , Ibaraki 305-8565 , Japan
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He D, Lv Y, Tong Q. Succinylation Improves the Thermal Stability of Egg White Proteins. Molecules 2019; 24:molecules24203783. [PMID: 31640198 PMCID: PMC6832609 DOI: 10.3390/molecules24203783] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 10/17/2019] [Accepted: 10/18/2019] [Indexed: 01/18/2023] Open
Abstract
Succinylation can improve the thermal stability of various proteins. In this study, succinylated egg white protein (SEWP) samples with different succinylation degrees were prepared by adding various succinic anhydride additives to egg white protein (EWP). The thermal stability of SEWP and the conformational structure under various succinylation degrees were investigated. With the increase in succinylation degree, the turbidity of heated SEWP solution (90 °C for 30 min) markedly declined. The heated SEWP solution with high succinylation degree (37.63%, 66.57%, and 72.37%) was transparent. Moreover, the result of differential scanning calorimetry confirmed that the thermal stability of succinylated EWP increased. The results of intrinsic fluorescence spectra and Fourier-transform infrared spectroscopy illustrate that succinylation changed the conformational structure of EWP. Succinylation increased the electrostatic repulsion and decreased the surface hydrophobicity, and it changed the aggregation morphology of EWP. Cross-linked spherical aggregates of low succinylation degree transformed to thready aggregates of a high succinylation degree. Thus, succinylation improved the thermal stability of EWP.
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Affiliation(s)
- Dabo He
- College of Food Science and Engineering, Beijing University of Agriculture, 7 Beinong Lu, Changping District, Beijing 102206, China.
| | - Ying Lv
- College of Food Science and Engineering, Beijing University of Agriculture, 7 Beinong Lu, Changping District, Beijing 102206, China.
| | - Qigen Tong
- College of Food Science and Engineering, Beijing University of Agriculture, 7 Beinong Lu, Changping District, Beijing 102206, China.
- Beijing Engineering Research Center of Egg Safety Production and Processing, Beijing 100094, China.
- Beijing Laboratory for Food Quality and Safety, Beijing 100022, China.
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Singh V, Patel KA, Sharma RK, Patil PR, Joshi AS, Parihar R, Athilingam T, Sinha N, Ganesh S, Sinha P, Roy I, Thakur AK. Discovery of Arginine Ethyl Ester as Polyglutamine Aggregation Inhibitor: Conformational Transitioning of Huntingtin N-Terminus Augments Aggregation Suppression. ACS Chem Neurosci 2019; 10:3969-3985. [PMID: 31460743 DOI: 10.1021/acschemneuro.9b00167] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Huntington's disease (HD) is a genetic disorder caused by a CAG expansion mutation in the huntingtin gene leading to polyglutamine (polyQ) expansion in the N-terminal part of huntingtin (Httex1). Expanded polyQ, through a complex aggregation pathway, forms aggregates in neurons and presents a potential therapeutic target. Here we show Httex1 aggregation suppression by arginine and arginine ethyl ester (AEE) in vitro, as well as in yeast and mammalian cell models of HD, bearing expanded polyQ. These molecules also rescue locomotion dysfunction in HD Drosophila model. Both molecules alter the hydrogen bonding network of polyQ to enhance its aqueous solubility and delay aggregation. AEE shows direct binding with the NT17 part of Httex1 to induce structural changes to impart an enhanced inhibitory effect. This study provides a platform for the development of better arginine based therapeutic molecules against polyQ-rich Httex1 aggregation.
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Affiliation(s)
- Virender Singh
- Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
- Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Kinjal A. Patel
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research, S.A.S. Nagar, Punjab 160062, India
| | - Raj Kumar Sharma
- Centre of Biomedical Research, SGPGIMS Campus, Raibarelly Road, Lucknow, Uttar Pradesh 226014, India
| | - Pratik R. Patil
- Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Abhayraj S. Joshi
- Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Rashmi Parihar
- Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Thamarailingam Athilingam
- Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Neeraj Sinha
- Centre of Biomedical Research, SGPGIMS Campus, Raibarelly Road, Lucknow, Uttar Pradesh 226014, India
| | - Subramaniam Ganesh
- Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Pradip Sinha
- Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Ipsita Roy
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research, S.A.S. Nagar, Punjab 160062, India
| | - Ashwani Kumar Thakur
- Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
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Anumalla B, Prabhu NP. Counteracting Effect of Charged Amino Acids Against the Destabilization of Proteins by Arginine. Appl Biochem Biotechnol 2019; 189:541-555. [PMID: 31056736 DOI: 10.1007/s12010-019-03026-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 04/22/2019] [Indexed: 10/26/2022]
Abstract
Studies on osmolyte-induced effects on proteins help in enhancing protein stability under stressed conditions for various applications. Using mixtures of osmolytes could indeed widen their applications. The combinatorial effects of osmolytes with methylamines are majorly found in the literature; however, such studies are limited on the amino acid class of osmolytes. The present study examines the effect of charged amino acids Arg, Asp, and Lys on the stability of RNase A and α-LA. The thermal stabilities of the proteins in the presence of osmolytes are monitored by absorption changes, and the structural changes are analyzed using fluorescence quenching and near-UV circular dichroism (CD). These results are compared with our previous report on the effect of Glu. Arg destabilizes both the proteins whereas Asp, Lys, and Glu stabilize the proteins. The extent of stability provided by Asp and Glu is almost same and higher than Lys in RNase A. However, the stability acquired in the presence of Asp and Lys is comparable for α-LA and Glu provides higher stability. Further, the quenching and CD results suggest that the addition of amino acids do not alter the structure of the proteins significantly. The counteracting abilities of the stabilizing amino acids (stAAs) against Arg are then investigated. The results show that Glu could counteract Arg at the lowest fraction in the mixture. Lys requires nearly equimolar concentration whereas Asp needs almost double the concentration to counteract Arg induced destabilization of the proteins. At higher concentrations, the counteracting ability of Asp and Lys is similar for both the proteins. The counteracting ratio might slightly vary among the proteins, and it is not necessary that the amino acid providing higher stability to the protein could more effectively counteract Arg. This could be due to the change in the extent of preferential hydration of the proteins by stAAs in the presence of Arg. The results suggest that the addition of stAAs could be an effective strategy to increase the protein stability in biotechnology and biopharma applications.
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Affiliation(s)
- Bramhini Anumalla
- Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad, 500 046, India
| | - N Prakash Prabhu
- Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad, 500 046, India.
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Liu D, Chen X, Huang M, Zhou G. Antioxidant activity of peptides in postmortem aged duck meat as affected by cooking and in vitro digestion. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2019. [DOI: 10.1080/10942912.2019.1605374] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Dongmei Liu
- Nanjing Innovation Center of Meat Products Processing, Synergetic Innovation Center of Food Safety and Nutrition, and College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu, People’s Republic of China
| | - Xing Chen
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Ming Huang
- Nanjing Innovation Center of Meat Products Processing, Synergetic Innovation Center of Food Safety and Nutrition, and College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu, People’s Republic of China
| | - Guanghong Zhou
- Nanjing Innovation Center of Meat Products Processing, Synergetic Innovation Center of Food Safety and Nutrition, and College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu, People’s Republic of China
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Saadati-Eskandari N, Navidpour L, Yaghmaei P, Ebrahim-Habibi A. Amino Acids as Additives against Amorphous Aggregation: In Vitro and In Silico Study on Human Lysozyme. Appl Biochem Biotechnol 2019; 189:305-317. [PMID: 30980288 DOI: 10.1007/s12010-019-03010-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 03/27/2019] [Indexed: 01/22/2023]
Abstract
The effect of 16 amino acids (AA) with various physicochemical properties was investigated on human lysozyme (HL) heat-induced amorphous aggregation. UV-Visible spectrophotometry was used to monitor the kinetics of aggregation in the absence and presence of AA, and transmission electron microscopy (TEM) images were taken from the aggregates. To conduct in silico experiments, Autodock vina was used for docking of AA into protein (via YASARA interface), and FTmap information was checked for an insight onto putative binding sites. Prediction of aggregation-prone regions of lysozyme was made by AGGRESCAN and Tango. Among all tested AA, phenylalanine had the best anti-aggregation effect, followed by lysine. In addition, based on in silico tests, Trp 109 and Val 110 of lysozyme are suggested to be of importance in the aggregation process of the enzyme. In conclusion, phenylalanine, arginine, and lysine were found to affect the nucleation phase of lysozyme aggregation and could be considered as suitable stabilizing structures for this enzyme.
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Affiliation(s)
- Naghmeh Saadati-Eskandari
- Department of Biology, Faculty of Basic Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Latifeh Navidpour
- Department of Medicinal Chemistry, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, 14174, Iran.
| | - Parichehreh Yaghmaei
- Department of Biology, Faculty of Basic Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Azadeh Ebrahim-Habibi
- Biosensor Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Jalal-al-Ahmad street, Chamran Highway, Tehran, 1411713137, Iran.
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran.
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Coacervates and coaggregates: Liquid–liquid and liquid–solid phase transitions by native and unfolded protein complexes. Int J Biol Macromol 2018; 120:10-18. [DOI: 10.1016/j.ijbiomac.2018.08.063] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 08/11/2018] [Accepted: 08/13/2018] [Indexed: 11/23/2022]
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Oki S, Nishinami S, Shiraki K. Arginine suppresses opalescence and liquid–liquid phase separation in IgG solutions. Int J Biol Macromol 2018; 118:1708-1712. [DOI: 10.1016/j.ijbiomac.2018.07.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Revised: 07/03/2018] [Accepted: 07/04/2018] [Indexed: 01/07/2023]
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29
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Wang W, Roberts CJ. Protein aggregation – Mechanisms, detection, and control. Int J Pharm 2018; 550:251-268. [DOI: 10.1016/j.ijpharm.2018.08.043] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 08/18/2018] [Accepted: 08/20/2018] [Indexed: 12/19/2022]
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Gharbi N, Labbafi M. Effect of processing on aggregation mechanism of egg white proteins. Food Chem 2018; 252:126-133. [DOI: 10.1016/j.foodchem.2018.01.088] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Revised: 01/10/2018] [Accepted: 01/11/2018] [Indexed: 12/26/2022]
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Nishinami S, Yoshizawa S, Arakawa T, Shiraki K. Allantoin and hydantoin as new protein aggregation suppressors. Int J Biol Macromol 2018; 114:497-503. [PMID: 29505874 DOI: 10.1016/j.ijbiomac.2018.03.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 02/21/2018] [Accepted: 03/02/2018] [Indexed: 01/08/2023]
Abstract
Allantoin is widely used in pharmaceutical and cosmetic products, and is composed of a hydantoin ring and a ureido group. Recent reports showed that allantoin suppresses thermal aggregation of hen egg white lysozyme (LYZ). However, structural insight into the properties of allantoin on protein aggregation and whether allantoin controls the aggregation of other proteins under different stress conditions remain unclear. Here we studied the structural properties of allantoin in terms of its effects on protein aggregation by comparing allantoin with urea and hydantoin. Furthermore, we analyzed the effects of allantoin and its derivatives on the aggregation of LYZ, carbonic anhydrase from bovine erythrocytes (BCA), albumin from chicken egg white (OVA), and immunoglobulin G (IgG) by various stresses in comparison with arginine. These four proteins are widely different in charged state and molecular size. Allantoin suppressed the aggregation and inactivation of LYZ comparing to arginine without affecting the melting temperature of proteins, and was responsible for the slightly improved formation of soluble oligomers and insoluble aggregates of IgG with thermal and acidic stresses. In contrast, hydantoin increased the solubility of aromatic amino acids more effectively than arginine and allantoin. The structural properties underlying the observed effects of allantoin as an aggregation suppressor include hydrophobic interactions between hydantoin moiety and aromatic ring on the surface of proteins, which is reflected on the difference between allantoin and arginine. These results show that the backbone of hydantoin ring may be a new category of additives for development of small aggregation suppressors.
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Affiliation(s)
- Suguru Nishinami
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Shunsuke Yoshizawa
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Tsutomu Arakawa
- Alliance Protein Laboratories, San Diego, CA 92121, United States
| | - Kentaro Shiraki
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan.
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Oki S, Nonaka T, Shiraki K. Specific solubilization of impurities in culture media: Arg solution improves purification of pH-responsive tag CspB50 with Teriparatide. Protein Expr Purif 2018; 146:85-90. [PMID: 29425938 DOI: 10.1016/j.pep.2018.02.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 02/05/2018] [Accepted: 02/05/2018] [Indexed: 12/30/2022]
Abstract
Protein purification using non-chromatographic methods is a simple technique that avoids costly resin. Recently, a cell surface protein B (CspB) tag has been developed for a pH-responsive tag for protein purification by solid-liquid separation. Proteins fused with the CspB tag show reversible insolubilization at acidic pH that can be used in solid-liquid separation for protein purification. However, brown-color impurities from co-precipitation hamper further analysis of the target proteins. In this study, we investigated the effect of additives on the co-precipitation of CspB-tagged Teriparatide (CspB50TEV-Teriparatide) expressed in Corynebacterium glutamicum and associated impurities. Arginine (Arg) at 1.0 M was found to be the most effective additive for removing impurities, particularly carotenoids and nucleic acids. Furthermore, all impurities detected in the fluorescence and absorbance spectra were successfully removed by the repetition of precipitation-redissolution in the Arg solution. The precipitation yield of the CspB50TEV-Teriparatide did not change with the addition of Arg and the repetition of the precipitation-redissolution process. Collectively, our findings indicate that the specific desorption of π-electron rich compounds by Arg may be useful in conjunction with the pH-responsive CspB tag for solid-liquid protein purification.
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Affiliation(s)
- Shogo Oki
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Takahiro Nonaka
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan; Research Institute for Bioscience Product & Fine Chemicals, Ajinomoto Co., Inc, 1-1, Suzuki-Cho, Kawasaki 210-8681, Japan
| | - Kentaro Shiraki
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan.
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Oki S, Iwashita K, Kimura M, Kano H, Shiraki K. Mechanism of co-aggregation in a protein mixture with small additives. Int J Biol Macromol 2018; 107:1428-1437. [DOI: 10.1016/j.ijbiomac.2017.10.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 09/29/2017] [Accepted: 10/02/2017] [Indexed: 12/16/2022]
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