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Islam N, Krishnan HB, Natarajan SS. Protein profiling of fast neutron soybean mutant seeds reveals differential accumulation of seed and iron storage proteins. PHYTOCHEMISTRY 2022; 200:113214. [PMID: 35469783 DOI: 10.1016/j.phytochem.2022.113214] [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: 10/20/2021] [Revised: 04/18/2022] [Accepted: 04/19/2022] [Indexed: 06/14/2023]
Abstract
A fast neutron (FN) radiated mutant soybean (Glycine max (L.) Merr., Fabaceae) displaying large duplications exhibited an increase in total seed protein content. A tandem mass tag (TMT) based protein profiling of matured seeds resulted in the identification of 4338 proteins. Gene duplication resulted in a significant increase in several seed storage proteins and protease inhibitors. Among the storage proteins, basic 7 S globulin, glycinin G4, and beta-conglycinin showed higher abundance in matured FN mutant seeds in addition to protease inhibitors. A significantly higher abundance of L-ascorbate peroxidases, acid phosphatases, and iron storage proteins was also observed. A higher amount of albumin, sucrose synthase, iron storage, and ascorbate family proteins in the mutant seeds was observed at the mid-stage of seed filling. We anticipate that the duplicated genes might have a cascading effect on the genome constituents, thus, resulting in increased storage and iron-containing protein content in the mutant seeds.
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Affiliation(s)
- Nazrul Islam
- Soybean Genomics and Improvement Laboratory, USDA-ARS, Beltsville, MD, 20705, USA
| | - Hari B Krishnan
- Plant Genetics Research Unit, USDA-ARS, University of Missouri, Columbia, MO, 65211, USA
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2
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Han X, Li J, Zhao Y, Zhang Z, Jiang H, Wang J, Feng X, Zhang Y, Du Z, Wu X, Chen Q, Qi Z. Integrated transcriptomic and proteomic characterization of a chromosome segment substitution line reveals a new regulatory network controlling the seed storage profile of soybean. Food Energy Secur 2022. [DOI: 10.1002/fes3.381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Affiliation(s)
- Xue Han
- College of Agriculture Northeast Agricultural University Harbin China
- Heilongjiang Academy of Land Reclamation Sciences Harbin China
| | - Jiapeng Li
- College of Agriculture Northeast Agricultural University Harbin China
| | - Yabin Zhao
- College of Agriculture Northeast Agricultural University Harbin China
| | - Zhanguo Zhang
- College of Agriculture Northeast Agricultural University Harbin China
| | - Hongwei Jiang
- Soybean Research Institute Jilin Academy of Agricultural Sciences Changchun China
| | - Jinxing Wang
- Suihua Branch Institute, HeiLongJiang Academy of Agricultural Sciences Suihua China
| | - Xuezhen Feng
- College of Agriculture Northeast Agricultural University Harbin China
| | - Yu Zhang
- College of Agriculture Northeast Agricultural University Harbin China
| | - Ziyue Du
- College of Agriculture Northeast Agricultural University Harbin China
| | - Xiaoxia Wu
- College of Agriculture Northeast Agricultural University Harbin China
| | - Qingshan Chen
- College of Agriculture Northeast Agricultural University Harbin China
| | - Zhaoming Qi
- College of Agriculture Northeast Agricultural University Harbin China
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Wei X, Kim WS, Song B, Oehrle NW, Liu S, Krishnan HB. Soybean Mutants Lacking Abundant Seed Storage Proteins Are Impaired in Mobilization of Storage Reserves and Germination. ACS OMEGA 2020; 5:8065-8075. [PMID: 32309716 PMCID: PMC7161034 DOI: 10.1021/acsomega.0c00128] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 03/19/2020] [Indexed: 06/11/2023]
Abstract
Spontaneous and radiation-induced mutants of soybean, despite loss of abundant seed proteins, have been reported to grow and reproduce normally without any apparent physiological abnormalities. Here, we report the development and characterization of a soybean line (BSH-2) that lacks several abundant seed storage proteins. One-dimensional and high-resolution two-dimensional gel electrophoresis revealed the absence of the α' and α subunits of β-conglycinin and G1, G2, G4, and G5 glycinin in the newly developed mutant line (BSH-2). Like our earlier developed soybean mutant line (BSH-3), the seeds of BSH-2 also accumulated high levels of free amino acids as compared with wild-type DN47 seeds. An examination of the germination rates revealed that both BSH-2 and BSH-3 had significantly lower germination rates compared with the parent line DN47. Two-dimensional gel electrophoresis analysis demonstrated that these mutants had slower rates of mobilization of seed storage proteins. The delayed mobilization of storage proteins in BSH-2 and BSH-3 seeds was also correlated with a delayed induction of proteolytic activity in the mutants when compared to DN47. Similarly, qRT-PCR analysis revealed distinct expression pattern of genes involved in proteolytic pathway in the mutants when compared to DN47. Transmission electron microscopy observation of soybean seeds at two germination stages revealed striking differences in the breakdown of protein storage vacuoles and lipid bodies in the mutants. Our study demonstrates that BSH-2 and BSH-3 are compromised in mobilization of storage reserves and the absence of abundant storage proteins may affect the seed germination efficiency and post-germinative seedling establishment.
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Affiliation(s)
- Xiaoshuang Wei
- Key
Laboratory of Soybean Biology at the Chinese Ministry of Education, Northeast Agricultural University, Harbin 150030, China
- Plant
Genetics Research, USDA-Agricultural Research
Service, Columbia, Missouri 65211, United
States
| | - Won-Seok Kim
- Plant
Science Division, University of Missouri, Columbia, Missouri 65211, United States
| | - Bo Song
- Key
Laboratory of Soybean Biology at the Chinese Ministry of Education, Northeast Agricultural University, Harbin 150030, China
| | - Nathan W. Oehrle
- Plant
Genetics Research, USDA-Agricultural Research
Service, Columbia, Missouri 65211, United
States
| | - Shanshan Liu
- Key
Laboratory of Soybean Biology at the Chinese Ministry of Education, Northeast Agricultural University, Harbin 150030, China
| | - Hari B. Krishnan
- Plant
Genetics Research, USDA-Agricultural Research
Service, Columbia, Missouri 65211, United
States
- Plant
Science Division, University of Missouri, Columbia, Missouri 65211, United States
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Song B, Oehrle NW, Liu S, Krishnan HB. Development and Characterization of a Soybean Experimental Line Lacking the α' Subunit of β-Conglycinin and G1, G2, and G4 Glycinin. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:432-439. [PMID: 29227096 DOI: 10.1021/acs.jafc.7b05011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A soybean experimental line (BSH-3) devoid of a subset of seed storage proteins was developed by crossing a mutant donor line "HS99B" with a Chinese cultivar "Dongnong47" (DN47). One-dimensional and high-resolution 2-D gel electrophoresis revealed the absence of G1 (A1aB2), G2 (A2B1a), and G4 (A5A4B3) glycinin and the α' subunit of β-conglycinin in BSH-3 seeds. Despite the lack of these abundant seed proteins, BSH-3 seeds still accumulated 38% protein. BSH-3 seeds also accumulated high levels of free amino acids as compared with DN47 seeds, particularly arginine, and the amount of several essential amino acids were significantly elevated in BSH-3 seeds. Elevated accumulation of α and β-subunit of β-conglycinin, G5 glycinin, Kunitz trypsin inhibitor, and Bowman-Birk protease inhibitor indicates seed proteome rebalancing in BSH-3 seeds. Immunoblot analysis using sera from soybean allergic patients demonstrated the complete lack of a major allergen (α' subunit of β-conglycinin) in BSH-3 seeds. However, elevated levels of other allergens were found in BSH-3 seeds due to proteome rebalancing. Transmission electron microscopy observation of mature seeds of BSH-3 revealed striking differences in the appearance of the protein storage vacuoles when compared with DN47.
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Affiliation(s)
- Bo Song
- Key Laboratory of Soybean Biology at the Chinese Ministry of Education, Northeast Agricultural University , Harbin 150030, China
- Plant Genetics Research Unit, Agricultural Research Service, U.S. Department of Agriculture, University of Missouri , Columbia, Missouri 65211, United States
| | - Nathan W Oehrle
- Plant Genetics Research Unit, Agricultural Research Service, U.S. Department of Agriculture, University of Missouri , Columbia, Missouri 65211, United States
| | - Shanshan Liu
- Key Laboratory of Soybean Biology at the Chinese Ministry of Education, Northeast Agricultural University , Harbin 150030, China
| | - Hari B Krishnan
- Plant Genetics Research Unit, Agricultural Research Service, U.S. Department of Agriculture, University of Missouri , Columbia, Missouri 65211, United States
- Plant Science Division, University of Missouri , Columbia, Missouri 65211, United States
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Geng T, Stojšin D, Liu K, Schaalje B, Postin C, Ward J, Wang Y, Liu ZL, Li B, Glenn K. Natural Variability of Allergen Levels in Conventional Soybeans: Assessing Variation across North and South America from Five Production Years. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:463-472. [PMID: 27997188 DOI: 10.1021/acs.jafc.6b04542] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Soybean (Glycine max L. Merrill) is one of eight major allergenic foods with endogenous proteins identified as allergens. To better understand the natural variability of five soybean allergens (Gly m 4, Gly m 5, Gly m 6, Gly m Bd 28k, and Gly m Bd 30k), validated enzyme-linked immunosorbent assays (ELISAs) were developed. These ELISAs measured allergens in 604 soybean samples collected from locations in North and South America over five growing seasons (2009-2013/2014) and including 37 conventional varieties. Levels of these five allergens varied 5-19-fold. Multivariate statistical analyses and pairwise comparisons show that environmental factors have a larger effect on allergen levels than genetic factors. Therefore, from year to year, consumers are exposed to highly variable levels of allergens in soy-based foods, bringing into question whether quantitative comparison of endogenous allergen levels of new genetically modified soybean adds meaningful information to their overall safety risk assessment.
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Affiliation(s)
- Tao Geng
- Monsanto Company, 800 North Lindbergh Boulevard, St. Louis, Missouri 63167, United States
| | - Duška Stojšin
- Monsanto Company, 800 North Lindbergh Boulevard, St. Louis, Missouri 63167, United States
| | - Kang Liu
- Monsanto Company, 800 North Lindbergh Boulevard, St. Louis, Missouri 63167, United States
| | - Bruce Schaalje
- Monsanto Company, 800 North Lindbergh Boulevard, St. Louis, Missouri 63167, United States
| | - Cody Postin
- Monsanto Company, 800 North Lindbergh Boulevard, St. Louis, Missouri 63167, United States
| | - Jason Ward
- Monsanto Company, 800 North Lindbergh Boulevard, St. Louis, Missouri 63167, United States
| | - Yongcheng Wang
- Monsanto Company, 800 North Lindbergh Boulevard, St. Louis, Missouri 63167, United States
| | - Zi Lucy Liu
- Monsanto Company, 800 North Lindbergh Boulevard, St. Louis, Missouri 63167, United States
| | - Bin Li
- Monsanto Company, 800 North Lindbergh Boulevard, St. Louis, Missouri 63167, United States
| | - Kevin Glenn
- Monsanto Company, 800 North Lindbergh Boulevard, St. Louis, Missouri 63167, United States
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Dubois AEJ, Pagliarani G, Brouwer RM, Kollen BJ, Dragsted LO, Eriksen FD, Callesen O, Gilissen LJWJ, Krens FA, Visser RGF, Smulders MJM, Vlieg-Boerstra BJ, Flokstra-de Blok BJ, van de Weg WE. First successful reduction of clinical allergenicity of food by genetic modification: Mal d 1-silenced apples cause fewer allergy symptoms than the wild-type cultivar. Allergy 2015; 70:1406-12. [PMID: 26138410 DOI: 10.1111/all.12684] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/23/2015] [Indexed: 11/28/2022]
Abstract
BACKGROUND Genetic modification of allergenic foods such as apple has the potential to reduce their clinical allergenicity, but this has never been studied by oral challenges in allergic individuals. METHODS We performed oral food challenges in 21 apple-allergic individuals with Elstar apples which had undergone gene silencing of the major allergen of apple, Mal d 1, by RNA interference. Downregulation of Mal d 1 gene expression in the apples was verified by qRT-PCR. Clinical responses to the genetically modified apples were compared to those seen with the wild-type Elstar using a visual analogue scale (VAS). RESULTS Gene silencing produced two genetically modified apple lines expressing Mal d 1.02 and other Mal d 1 gene mRNA levels which were extensively downregulated, that is only 0.1-16.4% (e-DR1) and 0.2-9.9% (e-DR2) of those of the wild-type Elstar, respectively. Challenges with these downregulated apple lines produced significantly less intense maximal symptoms to the first dose (Vmax1) than with Elstar (Vmax1 Elstar 3.0 mm vs 0.0 mm for e-DR1, P = 0.017 and 0.0 mm for e-DR2, P = 0.043), as well as significantly less intense mean symptoms per dose (meanV/d) than with Elstar (meanV/d Elstar 2.2 mm vs 0.2 mm for e-DR1, P = 0.017 and 0.0 mm for e-DR2, P = 0.043). Only one subject (5%) remained symptom-free when challenged with the Elstar apple, whereas 43% did so with e-DR1 and 63% with e-DR2. CONCLUSION These data show that mRNA silencing of Mal d 1 results in a marked reduction of Mal d 1 gene expression in the fruit and reduction of symptoms when these apples are ingested by allergic subjects. Approximately half of the subjects developed no symptoms whatsoever, and virtually all subjects wished to consume the apple again in the future.
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Affiliation(s)
- A. E. J. Dubois
- Department of Pediatric Pulmonology and Pediatric Allergy, and GRIAC Research Institute; Beatrix Children's Hospital; University Medical Center Groningen; University of Groningen; Groningen The Netherlands
| | - G. Pagliarani
- Wageningen UR Plant Breeding; Wageningen University and Research Centre; Wageningen The Netherlands
| | - R. M. Brouwer
- Department of Pediatric Pulmonology and Pediatric Allergy, and GRIAC Research Institute; Beatrix Children's Hospital; University Medical Center Groningen; University of Groningen; Groningen The Netherlands
| | - B. J. Kollen
- Department of General Practice, and GRIAC Research Institute; University Medical Center Groningen; University of Groningen; Groningen The Netherlands
| | - L. O. Dragsted
- Department of Nutrition, Exercise and Sports; University of Copenhagen; Frederiksberg Denmark
| | - F. D. Eriksen
- Technical University of Denmark; National Food Institute, Toxicology and Risk Assessment; Søborg Denmark
| | - O. Callesen
- Department of Horticulture; Faculty of Agricultural Sciences; University of Aarhus; Årslev Denmark
| | - L. J. W. J. Gilissen
- Bioscience; Wageningen University and Research Centre; Wageningen The Netherlands
- Allergy Consortium Wageningen; Wageningen University and Research Centre; Wageningen The Netherlands
| | - F. A. Krens
- Wageningen UR Plant Breeding; Wageningen University and Research Centre; Wageningen The Netherlands
| | - R. G. F. Visser
- Allergy Consortium Wageningen; Wageningen University and Research Centre; Wageningen The Netherlands
| | - M. J. M. Smulders
- Wageningen UR Plant Breeding; Wageningen University and Research Centre; Wageningen The Netherlands
- Allergy Consortium Wageningen; Wageningen University and Research Centre; Wageningen The Netherlands
| | - B. J. Vlieg-Boerstra
- Department of Pediatric Pulmonology and Pediatric Allergy, and GRIAC Research Institute; Beatrix Children's Hospital; University Medical Center Groningen; University of Groningen; Groningen The Netherlands
| | - B. J. Flokstra-de Blok
- Department of General Practice, and GRIAC Research Institute; University Medical Center Groningen; University of Groningen; Groningen The Netherlands
| | - W. E. van de Weg
- Wageningen UR Plant Breeding; Wageningen University and Research Centre; Wageningen The Netherlands
- Allergy Consortium Wageningen; Wageningen University and Research Centre; Wageningen The Netherlands
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White BL, Shi X, Burk CM, Kulis M, Burks AW, Sanders TH, Davis JP. Strategies to Mitigate Peanut Allergy: Production, Processing, Utilization, and Immunotherapy Considerations. Annu Rev Food Sci Technol 2014; 5:155-76. [DOI: 10.1146/annurev-food-030713-092443] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Peanut (Arachis hypogaea L.) is an important crop grown worldwide for food and edible oil. The surge of peanut allergy in the past 25 years has profoundly impacted both affected individuals and the peanut and related food industries. In response, several strategies to mitigate peanut allergy have emerged to reduce/eliminate the allergenicity of peanuts or to better treat peanut-allergic individuals. In this review, we give an overview of peanut allergy, with a focus on peanut proteins, including the impact of thermal processing on peanut protein structure and detection in food matrices. We discuss several strategies currently being investigated to mitigate peanut allergy, including genetic engineering, novel processing strategies, and immunotherapy in terms of mechanisms, recent research, and limitations. All strategies are discussed with considerations for both peanut-allergic individuals and the numerous industries/government agencies involved throughout peanut production and utilization.
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Affiliation(s)
- Brittany L. White
- Market Quality and Handling Research Unit, Agricultural Research Service, US Department of Agriculture and
| | - Xiaolei Shi
- Department of Food, Bioprocessing and Nutrition Sciences at North Carolina State University, Raleigh, North Carolina 27695;, , ,
| | - Caitlin M. Burk
- Department of Pediatrics, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599;, ,
| | - Michael Kulis
- Department of Pediatrics, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599;, ,
| | - A. Wesley Burks
- Department of Pediatrics, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599;, ,
| | - Timothy H. Sanders
- Market Quality and Handling Research Unit, Agricultural Research Service, US Department of Agriculture and
| | - Jack P. Davis
- Market Quality and Handling Research Unit, Agricultural Research Service, US Department of Agriculture and
- Department of Food, Bioprocessing and Nutrition Sciences at North Carolina State University, Raleigh, North Carolina 27695;, , ,
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Herman EM. Soybean seed proteome rebalancing. FRONTIERS IN PLANT SCIENCE 2014; 5:437. [PMID: 25232359 PMCID: PMC4153022 DOI: 10.3389/fpls.2014.00437] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 08/15/2014] [Indexed: 05/19/2023]
Abstract
The soybean seed's protein content and composition are regulated by both genetics and physiology. Overt seed protein content is specified by the genotype's genetic framework and is selectable as a breeding trait. Within the genotype-specified protein content phenotype soybeans have the capacity to rebalance protein composition to create differing proteomes. Soybeans possess a relatively standardized proteome, but mutation or targeted engineering can induce large-scale proteome rebalancing. Proteome rebalancing shows that the output traits of seed content and composition result from two major types of regulation: genotype and post-transcriptional control of the proteome composition. Understanding the underlying mechanisms that specifies the seed proteome can enable engineering new phenotypes for the production of a high-quality plant protein source for food, feed, and industrial proteins.
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Affiliation(s)
- Eliot M. Herman
- *Correspondence: Eliot M. Herman, School of Plant Sciences, BIO5 Institute, University of Arizona, BIO5 Institute Room 249, 1657 East Helen Street, Tucson, AZ 85721-0240, USA e-mail:
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How much does transgenesis affect wheat allergenicity?: Assessment in two GM lines over-expressing endogenous genes. J Proteomics 2013; 80:281-91. [PMID: 23403254 DOI: 10.1016/j.jprot.2013.01.028] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 01/25/2013] [Accepted: 01/30/2013] [Indexed: 11/23/2022]
Abstract
UNLABELLED Wheat kernel albumins/globulins (A/G) and gluten proteins are responsible for baker's asthma and food allergy in atopic subjects. Although no commercial genetically modified wheats are currently being grown, they are under study and the allergenicity of GM products is a major concern. In order to establish the expected and unexpected effects of genetic transformation on allergenicity and also to carry out a safety assessment of genetic transformation, two GM wheat lines (bread and pasta wheat) transformed with endogenous genes were compared to their untransformed counterparts (wt), first by an allergenomic approach, and second, using ELISA with sera from patients suffering from food allergy to wheat and baker's asthma. The 2D immunoblots performed on sera from patients suffering from food allergy and baker's asthma on the A/G fraction of the four lines (two GM and two wt) revealed comparable IgE-binding profiles. A total of 109 IgE-binding spots were analyzed by mass spectrometry, and most of the proteins identified had already been described as allergens or potential allergens. Only two IgE-binding proteins were specific to one GM line. The concentration of specific IgE against the A/G fractions of GM wheat lines and their wt genotypes differed for some sera. BIOLOGICAL SIGNIFICANCE The originality of our paper is to relate the transformation of wheat lines with their potential allergenicity using patient sera, such focus has never been done before in wheat and should be of interest to the researches working in this field. Another interesting point of this paper is the study of two types of allergies (respiratory and food) on two wheat genotypes and their GM which reveals that some allergens already known in respiratory allergy could be involved in children suffering from wheat food allergy. In this paper we used a classical 2D proteomic analysis and the protein identifications were performed by mass spectrometry after spot picking and in gel trypsin hydrolysis. Concerning the LC-MS/MS analyses classical software and parameters were used as described in Material and methods. We worked on wheat which is actually not fully sequenced that was a difficulty; we therefore searched against two databanks (proteins and ESTs) in order to compare the results. Moreover all proteins reported in our paper were identified with at least three unique peptides. The identified proteins were checked for their potential allergenicity. In order to have a best interpretation of protein identified in terms of potential allergens, BLAST alignments were performed by using an allergen databank (SDAP). This allows the determination of the cross-reactivity of these identified proteins with known allergens of other species and also the prediction of a potential allergenicity.
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Yang Z, Li Y, Li C, Wang Z. Synthesis of hypoallergenic derivatives of the major allergen Fag t 1 from tartary buckwheat via sequence restructuring. Food Chem Toxicol 2012; 50:2675-80. [PMID: 22449541 DOI: 10.1016/j.fct.2012.03.039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 02/17/2012] [Accepted: 03/07/2012] [Indexed: 01/15/2023]
Abstract
Fag t 1, a legumin-type protein, is the major allergen in tartary buckwheat. In the current study, three recombinant derivatives of Fag t 1, designated as Fag t 1-rs1, Fag t 1-rs2, and Fag t 1-rs3, were constructed via rational design and genetic engineering. However, because of the loss of their native-like folds, the Fag t 1 derivatives failed to bind IgE, and their allergenic activities were reduced. The recombinant hypoallergenic variants are promising vaccine candidates for specific immunotherapy of buckwheat allergy. The unfolding of the Fag t 1 structure reduced its high resistance to gastrointestinal proteolysis and strongly reduced its IgE reactivity. The derivatives showed a more than 90% reduction in allergenic activity compared with rFag t 1. These results suggest that the structure-dependent stability of 11S seed storage proteins is directly related to digestive stability and allergenic potential. Therefore, the destruction of the native conformation is the appropriate strategy to reduce the allergenicity of the cupin family food allergens.
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Affiliation(s)
- Zhenhuang Yang
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Biotechnology, Shanxi University, Taiyuan 030006, PR China
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Affiliation(s)
- Angelo D’Alessandro
- Department of Ecological and Biological Sciences, Tuscia University, Largo dell’Università snc, 01100 - Viterbo, Italy
| | - Lello Zolla
- Department of Ecological and Biological Sciences, Tuscia University, Largo dell’Università snc, 01100 - Viterbo, Italy
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12
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Avni A, Blázquez MA. Can plant biotechnology help in solving our food and energy shortage in the future? Curr Opin Biotechnol 2011; 22:220-3. [PMID: 21330127 DOI: 10.1016/j.copbio.2011.01.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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