1
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Hu Y, Rees NH, Qiu C, Wang J, Jin Z, Wang R, Zhu Y, Chen H, Wang P, Liu S, Ren F, Williams GR. Fabrication of zein/modified cyclodextrin nanofibers for the stability enhancement and delivery of curcumin. Food Hydrocoll 2024; 156:110262. [DOI: 10.1016/j.foodhyd.2024.110262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2024]
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2
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Application of zein in gluten-free foods: A comprehensive review. Food Res Int 2022; 160:111722. [DOI: 10.1016/j.foodres.2022.111722] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 07/04/2022] [Accepted: 07/19/2022] [Indexed: 01/11/2023]
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3
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Oikonomopoulou V, Stramarkou M, Plakida A, Krokida M. Optimization of encapsulation of stevia glycosides through electrospraying and spray drying. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.107854] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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5
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Zhang X, Gao M, Zhang Y, Dong C, Xu M, Hu Y, Luan G. Effect of plasticizer and zein subunit on rheology and texture of zein network. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107140] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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6
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Ribeiro TS, Scramin JA, Rodrigues JAS, Bernardes Filho R, Colnago LA, Forato LA. 13C ss-NMR Singular value decomposition and fitting for sorghum proteins conformation elucidation. POLIMEROS 2022. [DOI: 10.1590/0104-1428.20210082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Zhang X, Dong C, Hu Y, Gao M, Luan G. Zein as a structural protein in gluten-free systems: an overview. FOOD SCIENCE AND HUMAN WELLNESS 2021. [DOI: 10.1016/j.fshw.2021.02.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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8
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Non-invasive quantification of vitamin C, citric acid, and sugar in 'Valência' oranges using infrared spectroscopies. Journal of Food Science and Technology 2021; 58:731-738. [PMID: 33568867 DOI: 10.1007/s13197-020-04589-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 06/05/2020] [Accepted: 06/17/2020] [Indexed: 10/24/2022]
Abstract
Near (NIR) and mid (MIR) infrared spectroscopies have been studied as potential methods for non-destructive analyses of the fresh fruits quality. In this study, vitamin C, citric acid, total and reducing sugar content in 'Valência' oranges were evaluated using NIR and MIR spectroscopy with multivariate analysis. The spectral data were used to build up prediction models based on PLS (Partial Least Squares) regression. For vitamin C and citric acid, both NIR (r = 0.72 and 0.77, respectively) and MIR (0.81 and 0.91, respectively) resulted in feasible models. For sugars determination the two techniques presented a strong correlation between the reference values and analytical signals, with low RMSEP and r > 0.70 (NIR: sucrose RMSEP = 12.2 and r = 0.75; glucose RMSEP = 6.77 and r = 0.82; fructose RMSEP = 5.07 and r = 0.81; total sugar RMSEP = 12.1 and r = 0.80; reducing sugar RMSEP = 20.32 and r = 0.82; MIR: sucrose RMSEP = 9.47 and r = 0.80; glucose RMSEP = 6.70 and r = 0.82; fructose RMSEP = 5.20 and r = 0.81; total sugar RMSEP = 11.72 and r = 0.81; reducing sugar RMSEP = 20.42 and r = 0.81). The models developed with MIR presented lower prediction error rates than those made with NIR. Therefore, infrared techniques show applicability to determine of orange quality parameters in a non-destructive way.
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He W, Tian L, Fang F, Chen D, Federici E, Pan S, Jones OG. Limited hydrolysis and conjugation of zein with chitosan oligosaccharide by enzymatic reaction to improve functional properties. Food Chem 2021; 348:129035. [PMID: 33524690 DOI: 10.1016/j.foodchem.2021.129035] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 12/31/2020] [Accepted: 01/04/2021] [Indexed: 10/22/2022]
Abstract
In order to improve its aqueous solubility and emulsifying function, zein was partially hydrolyzed by trypsin and conjugated to chitosan oligosaccharide lactate by transglutaminase. Hydrolysis and covalent linkage to chitosan oligosaccharide was confirmed by free amine content, gel electrophoresis, and infrared spectroscopy. Enzymatic glycosylation was optimized at pH 6, 44 °C, and 4 h to bind approximately 95% of the free amines in the hydrolysates to chitosan oligosaccharide. Hydrolysis and conjugation increased solubility of zein by 47.60% and 72.93%. Hydrolysis and conjugation also decreased surface hydrophobicity by more than 20% and more than doubled emulsifying activity index, emulsion stability index, and foaming capacity. This enzymatic modification has potential to be applied to improve functional properties of other prolamins.
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Affiliation(s)
- Wanying He
- Purdue University, Department of Food Science, West Lafayette, IN 47907, United States; Purdue University, Whistler Center for Carbohydrate Research, West Lafayette, IN 47907, United States; Huazhong Agricultural University, Department of Food Science and Technology, Wuhan 430070, PR China
| | - Liang Tian
- University of Alabama, Department of Information Technology, Tuscaloosa, AL 35487, United States
| | - Fang Fang
- Purdue University, Department of Food Science, West Lafayette, IN 47907, United States; Purdue University, Whistler Center for Carbohydrate Research, West Lafayette, IN 47907, United States
| | - Da Chen
- Purdue University, Department of Food Science, West Lafayette, IN 47907, United States; Purdue University, Whistler Center for Carbohydrate Research, West Lafayette, IN 47907, United States
| | - Enrico Federici
- Purdue University, Department of Food Science, West Lafayette, IN 47907, United States; Purdue University, Whistler Center for Carbohydrate Research, West Lafayette, IN 47907, United States
| | - Siyi Pan
- Huazhong Agricultural University, Department of Food Science and Technology, Wuhan 430070, PR China.
| | - Owen Griffith Jones
- Purdue University, Department of Food Science, West Lafayette, IN 47907, United States; Purdue University, Whistler Center for Carbohydrate Research, West Lafayette, IN 47907, United States.
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10
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Wang X, Zenda T, Liu S, Liu G, Jin H, Dai L, Dong A, Yang Y, Duan H. Comparative Proteomics and Physiological Analyses Reveal Important Maize Filling-Kernel Drought-Responsive Genes and Metabolic Pathways. Int J Mol Sci 2019; 20:ijms20153743. [PMID: 31370198 PMCID: PMC6696053 DOI: 10.3390/ijms20153743] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 07/15/2019] [Accepted: 07/29/2019] [Indexed: 12/17/2022] Open
Abstract
Despite recent scientific headway in deciphering maize (Zea mays L.) drought stress responses, the overall picture of key proteins and genes, pathways, and protein-protein interactions regulating maize filling-kernel drought tolerance is still fragmented. Yet, maize filling-kernel drought stress remains devastating and its study is critical for tolerance breeding. Here, through a comprehensive comparative proteomics analysis of filling-kernel proteomes of two contrasting (drought-tolerant YE8112 and drought-sensitive MO17) inbred lines, we report diverse but key molecular actors mediating drought tolerance in maize. Using isobaric tags for relative quantification approach, a total of 5175 differentially abundant proteins (DAPs) were identified from four experimental comparisons. By way of Venn diagram analysis, four critical sets of drought-responsive proteins were mined out and further analyzed by bioinformatics techniques. The YE8112-exclusive DAPs chiefly participated in pathways related to "protein processing in the endoplasmic reticulum" and "tryptophan metabolism", whereas MO17-exclusive DAPs were involved in "starch and sucrose metabolism" and "oxidative phosphorylation" pathways. Most notably, we report that YE8112 kernels were comparatively drought tolerant to MO17 kernels attributable to their redox post translational modifications and epigenetic regulation mechanisms, elevated expression of heat shock proteins, enriched energy metabolism and secondary metabolites biosynthesis, and up-regulated expression of seed storage proteins. Further, comparative physiological analysis and quantitative real time polymerase chain reaction results substantiated the proteomics findings. Our study presents an elaborate understanding of drought-responsive proteins and metabolic pathways mediating maize filling-kernel drought tolerance, and provides important candidate genes for subsequent functional validation.
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Affiliation(s)
- Xuan Wang
- Department of Crop Genetics and Breeding, College of Agronomy, Hebei Agricultural University, Baoding 071001, China
- North China Key Laboratory for Crop Germplasm Resources of the Education Ministry, Hebei Agricultural University, Baoding 071001, China
| | - Tinashe Zenda
- Department of Crop Genetics and Breeding, College of Agronomy, Hebei Agricultural University, Baoding 071001, China
- North China Key Laboratory for Crop Germplasm Resources of the Education Ministry, Hebei Agricultural University, Baoding 071001, China
| | - Songtao Liu
- Department of Crop Genetics and Breeding, College of Agronomy, Hebei Agricultural University, Baoding 071001, China
- North China Key Laboratory for Crop Germplasm Resources of the Education Ministry, Hebei Agricultural University, Baoding 071001, China
| | - Guo Liu
- Department of Crop Genetics and Breeding, College of Agronomy, Hebei Agricultural University, Baoding 071001, China
- North China Key Laboratory for Crop Germplasm Resources of the Education Ministry, Hebei Agricultural University, Baoding 071001, China
| | - Hongyu Jin
- Department of Crop Genetics and Breeding, College of Agronomy, Hebei Agricultural University, Baoding 071001, China
- North China Key Laboratory for Crop Germplasm Resources of the Education Ministry, Hebei Agricultural University, Baoding 071001, China
| | - Liang Dai
- Department of Crop Genetics and Breeding, College of Agronomy, Hebei Agricultural University, Baoding 071001, China
- North China Key Laboratory for Crop Germplasm Resources of the Education Ministry, Hebei Agricultural University, Baoding 071001, China
| | - Anyi Dong
- Department of Crop Genetics and Breeding, College of Agronomy, Hebei Agricultural University, Baoding 071001, China
- North China Key Laboratory for Crop Germplasm Resources of the Education Ministry, Hebei Agricultural University, Baoding 071001, China
| | - Yatong Yang
- Department of Crop Genetics and Breeding, College of Agronomy, Hebei Agricultural University, Baoding 071001, China
- North China Key Laboratory for Crop Germplasm Resources of the Education Ministry, Hebei Agricultural University, Baoding 071001, China
| | - Huijun Duan
- Department of Crop Genetics and Breeding, College of Agronomy, Hebei Agricultural University, Baoding 071001, China.
- North China Key Laboratory for Crop Germplasm Resources of the Education Ministry, Hebei Agricultural University, Baoding 071001, China.
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11
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Jiao Y, Zheng X, Chang Y, Li D, Sun X, Liu X. Zein-derived peptides as nanocarriers to increase the water solubility and stability of lutein. Food Funct 2018; 9:117-123. [DOI: 10.1039/c7fo01652b] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Zein and its derived peptides have been used as nanocarriers for bioactive components.
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Affiliation(s)
- Yan Jiao
- College of Food and Biological Engineering
- Qiqihar University
- Qiqihar 161006
- China
- Institute of Farm Products Processing
| | - Xiqun Zheng
- College of Food and Biological Engineering
- Qiqihar University
- Qiqihar 161006
- China
| | - Ying Chang
- College of Food and Biological Engineering
- Qiqihar University
- Qiqihar 161006
- China
| | - Dajing Li
- Institute of Farm Products Processing
- Jiangsu Academy of Agricultural Sciences
- Nanjing
- China
| | - Xiaohong Sun
- College of Food and Biological Engineering
- Qiqihar University
- Qiqihar 161006
- China
| | - Xiaolan Liu
- College of Food and Biological Engineering
- Qiqihar University
- Qiqihar 161006
- China
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12
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Dong SR, Xu HH, Tan JY, Xie MM, Yu GP. The structure and amphipathy characteristics of modified γ-zeins by SDS or alkali in conjunction with heating treatment. Food Chem 2017; 233:361-368. [PMID: 28530585 DOI: 10.1016/j.foodchem.2017.04.128] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 04/19/2017] [Accepted: 04/19/2017] [Indexed: 11/30/2022]
Abstract
γ-Zein was modified by SDS or alkali combined with heating treatments in water and in 70% ethanol to change its amphipathic properties and explore the relationship between amphipathic characteristic and structure. γ-Zein water-dispersibility was dramatically increased via alkali or SDS combined with heating treatments, but their ethanol-dispersibilities were significantly different during ethanol evaporation. High both water-dispersibility and ethanol-dispersibility were found from alkali modified γ-zein while high water-dispersibility but low ethanol-dispersibility were obtained from SDS modified γ-zein, indicating that alkali modified γ-zein had better amphipathic characteristic compared with SDS modified γ-zein. Alkali modified γ-zein with higher amphipathic characteristic possessed higher structural inversion ability since it was easy to recover its native state as solvent changing from water to ethanol, contrary to SDS modified γ-zeins whose amphipathic characteristic was not improved. Moreover, the higher structural inversion ability of alkali modified γ-zein depended on the recovery capability of α-helix structure as solvent altering.
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Affiliation(s)
- Shi-Rong Dong
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, 150030 Harbin, People's Republic of China
| | - Hong-Hua Xu
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, 150030 Harbin, People's Republic of China.
| | - Jun-Yan Tan
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, 150030 Harbin, People's Republic of China
| | - Ming-Ming Xie
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, 150030 Harbin, People's Republic of China
| | - Guo-Ping Yu
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, 150030 Harbin, People's Republic of China
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Zhang Y, Cui L, Li F, Shi N, Li C, Yu X, Chen Y, Kong W. Design, fabrication and biomedical applications of zein-based nano/micro-carrier systems. Int J Pharm 2016; 513:191-210. [DOI: 10.1016/j.ijpharm.2016.09.023] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 09/05/2016] [Accepted: 09/07/2016] [Indexed: 12/13/2022]
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14
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Formation of a viscoelastic dough from isolated total zein (α-, β- and γ-zein) using a glacial acetic acid treatment. J Cereal Sci 2016. [DOI: 10.1016/j.jcs.2016.09.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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15
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Andrade FD, Forato LA, Bernardes Filho R, Colnago LA. Quantification of protein secondary structure by (13)C solid-state NMR. Anal Bioanal Chem 2016; 408:3875-9. [PMID: 27068694 DOI: 10.1007/s00216-016-9484-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 03/07/2016] [Accepted: 03/10/2016] [Indexed: 10/22/2022]
Abstract
High-resolution (13)C solid-state NMR stands out as one of the most promising techniques to solve the structure of insoluble proteins featuring biological and technological importance. The simplest nuclear magnetic resonance (NMR) spectroscopy method to quantify the secondary structure of proteins uses the areas of carbonyl and alpha carbon peaks. The quantification obtained by fitting procedures depends on the assignment of the peaks to the structure, type of line shape, number of peaks to be used, and other parameters that are set by the operator. In this paper, we demonstrate that the analysis of (13)C NMR spectra by a pattern recognition method-based on the singular value decomposition (SVD) regression, which does not depend on the operator-shows higher correlation coefficients for α-helix and β-sheet (0.96 and 0.91, respectively) than Fourier transform infrared spectroscopy (FTIR) method. Therefore, the use of (13)C solid-state NMR spectra and SVD is a simple and reliable method for quantifying the secondary structures of insoluble proteins in solid-state.
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Affiliation(s)
- Fabiana Diuk Andrade
- Embrapa Instrumentação, Rua XV de Novembro 1452, São Carlos, São Paulo, 13560-970, Brazil
| | | | - Rubens Bernardes Filho
- Embrapa Instrumentação, Rua XV de Novembro 1452, São Carlos, São Paulo, 13560-970, Brazil
| | - Luiz Alberto Colnago
- Embrapa Instrumentação, Rua XV de Novembro 1452, São Carlos, São Paulo, 13560-970, Brazil.
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16
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Roy P, Sukul D. Protein–surfactant aggregate as a potential corrosion inhibitor for mild steel in sulphuric acid: zein–SDS system. RSC Adv 2015. [DOI: 10.1039/c4ra12821d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A protein–surfactant aggregate (zein–SDS system) acting as corrosion inhibitor for mild steel in H2SO4.
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Affiliation(s)
- Pialee Roy
- Department of Chemistry
- National Institute of Technology
- Durgapur
- India
| | - Dipankar Sukul
- Department of Chemistry
- National Institute of Technology
- Durgapur
- India
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Yan J, Pan Y, Cheetham AG, Lin YA, Wang W, Cui H, Liu CJ. One-step fabrication of self-assembled peptide thin films with highly dispersed noble metal nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:16051-7. [PMID: 24320975 DOI: 10.1021/la4036908] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Fabrication of organic thin films with highly dispersed inorganic nanoparticles is a very challenging topic. In this work, a new approach that combines electron-induced molecular self-assembly with simultaneous nanoparticle formation by room temperature electron reduction was developed to prepare peptide thin films with highly dispersed noble metal nanoparticles. Argon glow discharge was employed as the resource of electrons. The peptide motif KLVFF (Aβ16-20) self-assembled into two-dimensional membranes under the influence of hydrated electrons, while the metal ions in solution can be simultaneously reduced by electrons to form nanoparticles. Our TEM imaging reveals that metal nanoparticles were well-distributed in the resulting peptide thin films. Our results also suggest that the size of metal nanoparticles can be tuned by varying the initial concentration of the metal ion. This simple approach can be viewed as a promising strategy to create hybrid thin films that integrate functional inorganics into biomolecule scaffolds.
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Affiliation(s)
- Jinmao Yan
- Collaborative Innovation Center of Chemical Science and Engineering, School of Chemical Engineering and Technology, Tianjin University , Tianjin 300072, China
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18
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Anyango JO, Taylor JRN, Taylor J. Role of γ-kafirin in the formation and organization of kafirin microstructures. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:10757-10765. [PMID: 24148070 DOI: 10.1021/jf403571e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The possible importance of the cysteine-rich γ-prolamin in kafirin and zein functionality has been neglected. The role of γ-kafirin in organized microstructures was investigated in microparticles. Residual kafirin (total kafirin minus γ-kafirin) "microparticles" were non-discrete (amorphous mass of material), as viewed by electron microscopy and atomic force microscopy. Adding 15% γ-kafirin to residual kafirin resulted in the formation of a mixture of non-discrete material and nanosize discrete spherical structures. Adding 30% γ-kafirin to the residual kafirin resulted in discrete spherical nanosize particles. Fourier transform infrared spectroscopy indicated that γ-kafirin had a mixture of random-coil and β-sheet conformations, in contrast to total kafirin, which is mainly α-helical conformation. γ-Kafirin also had a very high glass transition temperature (Tg) (≈270 °C). The conformation and high Tg of γ-kafirin probably confer structural stability to kafirin microstructures. Because of its ability to form disulfide cross-links, γ-kafirin appears to be essential to form and stabilize organized microstructures.
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Affiliation(s)
- Joseph O Anyango
- Institute for Food, Nutrition and Well-being and Department of Food Science, University of Pretoria , Private Bag X20, Hatfield 0028, South Africa
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Kaas Q, Craik DJ. NMR of plant proteins. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2013; 71:1-34. [PMID: 23611313 DOI: 10.1016/j.pnmrs.2013.01.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Accepted: 01/21/2013] [Indexed: 06/02/2023]
Affiliation(s)
- Quentin Kaas
- The University of Queensland, Institute for Molecular Bioscience, Brisbane, Queensland 4072, Australia
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Forato LA, Britto DD, Scramin JA, Colnago LA, Assis OBG. Propriedades mecânicas e molhabilidade de filmes de zeínas extraídas de glúten de milho. POLIMEROS 2012. [DOI: 10.1590/s0104-14282012005000075] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Zeínas são proteínas de reserva do milho (prolaminas), que podem ser extraídas através de solubilização em meio alcoólico. Essas proteínas são altamente hidrofóbicas, com elevado grau de polimerização. Neste estudo, zeínas do tipo a (massa molecular entre 10 e 22 kDa) foram extraídas do glúten do milho e caracterizadas com respeito às suas principais bandas de absorção espectroscópica na região do infravermelho. Blendas de zeínas com ácido oléico (AO) como plastificante foram avaliadas em diversas proporções e filmes processados por casting sobre superfície apolar. Filmes de zeínas sem plastificante mostraram-se inviáveis para manipulação e medidas, mas a adição de 1 e 2% em massa de AO proporcionou um significativo aumento do módulo de elasticidade, segundo análise realizada por DMA. A presença de plastificante introduz também irregularidades superficiais e leva a uma perda das características hidrofóbicas dessas proteínas.
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Alcântara ACS, Darder M, Aranda P, Ruiz-Hitzky E. Zein-Fibrous Clays Biohybrid Materials. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200582] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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22
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Kanjanapongkul K, Wongsasulak S, Yoovidhya T. Investigation and prevention of clogging during electrospinning of zein solution. J Appl Polym Sci 2010. [DOI: 10.1002/app.32499] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Alcântara ACS, Aranda P, Darder M, Ruiz-Hitzky E. Bionanocomposites based on alginate–zein/layered double hydroxide materials as drug delivery systems. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm01211d] [Citation(s) in RCA: 210] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Bicudo RC, Bicudo TC, Forato LA, Titato GM, Colnago LA, Lanças FM. Identification of non-zein proteins in BR473 maize protein bodies by LC-nanoESI-MS/MS. J Sep Sci 2009; 32:3579-84. [DOI: 10.1002/jssc.200900339] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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Bansal S, Mishra A, Tomar A, Sharma S, Khanna VK, Garg GK. Isolation and temporal endospermal expression of γ-kafirin gene of grain sorghum (Sorghum bicolor L. moench) var. M 35-1 for introgression analysis of transgene. J Cereal Sci 2008. [DOI: 10.1016/j.jcs.2008.06.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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26
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Bicudo TC, Bicudo RC, Forato LA, Beltramini LM, Batista LAR, Filho RB, Colnago LA. gamma-Zein secondary structure in solution by circular dichroism. Biopolymers 2008; 89:175-8. [PMID: 17994554 DOI: 10.1002/bip.20884] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The proline-rich N-terminal domain of gamma-zein has been reported in relevant processes, which include its ability to cross the cell membranes. Evidences indicate that synthetic hexapeptide (PPPVHL), naturally found in N-terminal portion of gamma-zein, can adopt the polyproline II (PPII) conformation in aqueous solution. The secondary structure of gamma-zein in maize protein bodies had been analyzed by solid state Fourier transform infrared and nuclear magnetic resonance spectroscopies. However, it was not possible to measure PPII content in physiological environment since the beta-sheet and PPII signals overlap in both solid state techniques. Here, the secondary structure of gamma-zein has been analyzed by circular dichroism in SDS aqueous solution with and without ditiothreitol (DTT), and in 60% of 2-propanol and water with DTT. The results show that gamma-zein has high helical content in all solutions. The PPII conformation was present at about 7% only in water/DTT solution.
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Affiliation(s)
- Tatiana C Bicudo
- Universidade de São Paulo, Instituto de Química de São Carlos, Av. Trabalhador Sãocarlense, 400, São Carlos, SP 13560-970, Brazil
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Xiao H, Cai G, Liu M. Fe2+-catalyzed non-enzymatic glycosylation alters collagen conformation during AGE-collagen formation in vitro. Arch Biochem Biophys 2007; 468:183-92. [PMID: 17964528 DOI: 10.1016/j.abb.2007.08.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2007] [Revised: 08/03/2007] [Accepted: 08/03/2007] [Indexed: 01/03/2023]
Abstract
Advanced glycation end-products (AGEs) are one of the major factors of hyperglycemia related complications for diabetic patients. We studied the formation of AGEs in type I collagen after Fe2+-catalyzed non-enzymatic glycosylation in vitro. Type I collagen isolated from rat tail tendon was incubated with glucose and increasing concentrations of iron ions Fe2+. After 4 weeks incubation, cytotoxity of AGEs was indicated by the cytotoxity assay of primary human umbilical vein endothelial cells and primary human monocytes cultured with glycosylated collagen AGEs. Fourier transform infrared spectroscopy analysis revealed that structural changes of functional groups in glycosylated collagen are accelerated by the catalyst Fe2+. Using two-dimensional Fourier-transform infrared correlation spectroscopy analyses, for the first time, we demonstrated that the order of structural changes of these functional groups is -CH->Amide I>Amide II>Amide III>nu(C=O) the carboxylic group of Asn, Gln or polyproline amino acid residue in the course of AGE-collagen formation. Knowing the positions of these functional groups in collagen, this order of changes indicates that during glycation of collagen, the structure of the main chain residues in collagen changed first, and then the side chain changed gradually, which may lead to more carboxylic groups exposed to glucose for further formation of AGE-collagen irreversibly. The findings presented may support the design of new therapeutic strategies to prevent or slow down the Fe2+-catalyzed glycosylation of collagen and other matrix proteins.
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Affiliation(s)
- Helan Xiao
- Department of Biological Science and Biotechnology, Cell and Developmental Laboratory, State Key Laboratory of Biomembrane and Membrane Biotechnology, Tsinghua University, Beijing 100084, PR China.
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