101
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Costa J, Carrapatoso I, Oliveira MBPP, Mafra I. Walnut allergens: molecular characterization, detection and clinical relevance. Clin Exp Allergy 2014; 44:319-41. [PMID: 24382327 DOI: 10.1111/cea.12267] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Food-induced allergies have been regarded as an emergent problem of public health. Classified as important allergenic ingredients, the presence of walnut and other nuts as hidden allergens in processed foods constitutes a risk for sensitized individuals, being a real problem of allergen management. Attending to the increasing importance dedicated to walnut allergy, this review intends to provide the relevant and up-to-date information on main issues such as the prevalence of walnut allergy, the clinical threshold levels, the molecular characterization of walnut allergens and their clinical relevance, as well as the methodologies for walnut allergen detection in foods. As the walnut used in human diet comes from Juglans regia and Juglans nigra, the molecular characterization of the allergens from both species included in the prolamins (Jug r 1, Jug n 1 and Jug r 3), cupins (Jug r 2, Jug n 2 and Jug r 4) and profilins (Jug r 5), together with respective clinical relevance, were compiled in this review. The most recent progresses on walnut allergen detection techniques (protein- and DNA-based) are described and critically compared, including the emergent multitarget approaches.
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Affiliation(s)
- J Costa
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal
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102
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Purification, characterisation and cloning of a 2S albumin with DNase, RNase and antifungal activities from Putranjiva roxburghii. Appl Biochem Biotechnol 2014; 174:471-82. [PMID: 25080380 DOI: 10.1007/s12010-014-1078-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Accepted: 07/22/2014] [Indexed: 10/25/2022]
Abstract
The present study reports the characterisation of a novel ~12-kDa heterodimeric protein, designated as putrin, from the seeds of Putranjiva roxburghii. The purification of putrin to homogeneity was accomplished using DEAE-sepharose where protein was unbound, CM-sepharose and Cibacron blue 3GA where it was bound and appeared as single peak on a size-exclusion chromatography column. A 15 % sodium dodecyl sulphate polyacrylamide electrophoresis gel, under reducing condition, demonstrated that putrin is made of two polypeptide chains of approximately 4.5 and 7.5 kDa. Circular dichroism studies demonstrated the helical nature and conformational stability of protein at increasing temperatures. Putrin exhibited both RNase and DNase activities and exerted antifungal activity but possessed relatively weak translation-inhibitory activity in cell-free system. The cloning and sequence analysis revealed a 414 bp open reading frame encoding a preproprotein of 137 amino acid residues. The amino acid sequence comparisons and phylogenetic analysis of putrin showed significant homology to 2S seed storage family proteins. The results demonstrated that putrin belongs to 2S albumin family and exhibits a spectrum of biotechnologically exploitable functions.
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103
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Mattison CP, Desormeaux WA, Wasserman RL, Yoshioka-Tarver M, Condon B, Grimm CC. Decreased immunoglobulin E (IgE) binding to cashew allergens following sodium sulfite treatment and heating. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:6746-6755. [PMID: 24926808 DOI: 10.1021/jf501117p] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Cashew nut and other nut allergies can result in serious and sometimes life-threatening reactions. Linear and conformational epitopes within food allergens are important for immunoglobulin E (IgE) binding. Methods that disrupt allergen structure can lower IgE binding and lessen the likelihood of food allergy reactions. Previous structural and biochemical data have indicated that 2S albumins from tree nuts and peanuts are potent allergens, and that their structures are sensitive to strong reducing agents such as dithiothreitol. This study demonstrates that the generally regarded as safe (GRAS) compound sodium sulfite effectively disrupted the structure of the cashew 2S albumin, Ana o 3, in a temperature-dependent manner. This study also showed that sulfite is effective at disrupting the disulfide bond within the cashew legumin, Ana o 2. Immunoblotting and ELISA demonstrated that the binding of cashew proteins by rabbit IgG or IgE from cashew-allergic patients was markedly lowered following treatment with sodium sulfite and heating. The results indicate that incorporation of sodium sulfite, or other food grade reagents with similar redox potential, may be useful processing methods to lower or eliminate IgE binding to food allergens.
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Affiliation(s)
- Christopher P Mattison
- Southern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, New Orleans, Louisiana 70124, United States
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104
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Mylne JS, Hara-Nishimura I, Rosengren KJ. Seed storage albumins: biosynthesis, trafficking and structures. FUNCTIONAL PLANT BIOLOGY : FPB 2014; 41:671-677. [PMID: 32481022 DOI: 10.1071/fp14035] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Accepted: 03/24/2014] [Indexed: 06/11/2023]
Abstract
Seed storage albumins are water-soluble and highly abundant proteins that are broken-down during seed germination to provide nitrogen and sulfur for the developing seedling. During seed maturation these proteins are subject to post-translational modifications and trafficking before they are deposited in great quantity and with great stability in dedicated vacuoles. This review will cover the subcellular movement, biochemical processing and mature structures of seed storage napins.
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Affiliation(s)
- Joshua S Mylne
- The University of Western Australia, School of Chemistry and Biochemistry and ARC Centre of Excellence in Plant Energy Biology, 35 Stirling Highway, Crawley, Perth, WA 6009, Australia
| | - Ikuko Hara-Nishimura
- Department of Botany, Graduate School of Science, Kyoto University, Kitashirakawa-oiwake cho Sakyo-ku, Kyoto, 606-8502, Japan
| | - K Johan Rosengren
- The University of Queensland, School of Biomedical Sciences, Brisbane, Qld 4072, Australia
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105
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Maloney KP, Truong VD, Allen JC. Susceptibility of sweet potato (Ipomoea batatas) peel proteins to digestive enzymes. Food Sci Nutr 2014; 2:351-60. [PMID: 25473492 PMCID: PMC4221833 DOI: 10.1002/fsn3.110] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 02/16/2014] [Accepted: 02/22/2014] [Indexed: 01/29/2023] Open
Abstract
Sweet potato proteins have been shown to possess antioxidant and antidiabetic properties in vivo. The ability of a protein to exhibit systemic effects is somewhat unusual as proteins are typically susceptible to digestive enzymes. This study was undertaken to better understand how digestive enzymes affect sweet potato proteins. Two fractions of industrially processed sweet potato peel, containing 6.8% and 8.5% protein and 80.5% and 83.3% carbohydrate, were used as a source of protein. Sweet potato proteins were incubated with pepsin, trypsin, and chymotrypsin and protein breakdown was visualized with SDS-PAGE. After pepsin digestion, samples were assayed for amylase inhibitory activity. Sporamin, the major storage protein in sweet potatoes, which functions as a trypsin inhibitor as well, exhibited resistance to pepsin, trypsin, and chymotrypsin. Sporamin from blanched peel of orange sweet potatoes was less resistant to pepsin digestion than sporamin from outer peel and from extract of the white-skinned Caiapo sweet potato. Trypsin inhibitory activity remained after simulated gastric digestion, with the Caiapo potato protein and peel samples exhibiting higher inhibitory activity compared to the blanched peel sample. Amylase and chymotrypsin inhibitory activity was not present in any of the samples after digestion.
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Affiliation(s)
- Katherine P Maloney
- Department of Food, Bioprocessing, and Nutrition Sciences, North Carolina State University Raleigh, North Carolina
| | - Van-Den Truong
- Department of Food, Bioprocessing, and Nutrition Sciences, North Carolina State University Raleigh, North Carolina ; USDA-ARS, SAA Food Science Research Unit, North Carolina State University Raleigh, North Carolina
| | - Jonathan C Allen
- Department of Food, Bioprocessing, and Nutrition Sciences, North Carolina State University Raleigh, North Carolina
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106
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Tomar PPS, Nikhil K, Singh A, Selvakumar P, Roy P, Sharma AK. Characterization of anticancer, DNase and antifungal activity of pumpkin 2S albumin. Biochem Biophys Res Commun 2014; 448:349-54. [DOI: 10.1016/j.bbrc.2014.04.158] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Accepted: 04/09/2014] [Indexed: 11/16/2022]
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107
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The Development of Transgenic Crops to Improve Human Health by Advanced Utilization of Seed Storage Proteins. Biosci Biotechnol Biochem 2014; 75:823-8. [DOI: 10.1271/bbb.100924] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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108
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Production and analysis of recombinant tree nut allergens. Methods 2014; 66:34-43. [DOI: 10.1016/j.ymeth.2013.07.033] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Revised: 07/15/2013] [Accepted: 07/19/2013] [Indexed: 01/08/2023] Open
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109
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Zhao Y, Qin G, Han R, Wang J, Zhang X, Liu D. β-Conglycinin reduces the tight junction occludin and ZO-1 expression in IPEC-J2. Int J Mol Sci 2014; 15:1915-26. [PMID: 24473141 PMCID: PMC3958829 DOI: 10.3390/ijms15021915] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2013] [Revised: 01/12/2014] [Accepted: 01/20/2014] [Indexed: 12/21/2022] Open
Abstract
Soybean allergy presents a health threat to humans and animals. The mechanism by which food/feed allergen β-conglycinin injures the intestinal barrier has not been well understood. In this study, the changes of epithelial permeability, integrity, metabolic activity, the tight junction (TJ) distribution and expression induced by β-conglycinin were evaluated using IPEC-J2 model. The results showed a significant decrease of trans-epithelial electrical resistance (TEER) (p < 0.001) and metabolic activity (p < 0.001) and a remarkable increase of alkaline phosphatase (AP) activity (p < 0.001) in a dose-dependent manner. The expression levels of tight junction occludin and ZO-1 were decreased (p < 0.05). The reduced fluorescence of targets and change of cellular morphology were recorded. The tight junction occludin and ZO-1 mRNA expression linearly declined with increasing β-conglycinin (p < 0.001).
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Affiliation(s)
- Yuan Zhao
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China.
| | - Guixin Qin
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China.
| | - Rui Han
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China.
| | - Jun Wang
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China.
| | - Xiaodong Zhang
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun 130062, China.
| | - Dandan Liu
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China.
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110
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Koid AE, Chapman MD, Hamilton RG, van Ree R, Versteeg SA, Dreskin SC, Koppelman SJ, Wünschmann S. Ara h 6 complements Ara h 2 as an important marker for IgE reactivity to peanut. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:206-13. [PMID: 24328145 PMCID: PMC4055559 DOI: 10.1021/jf4022509] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The similarities of two major peanut allergens, Ara h 2 and Ara h 6, in molecular size, amino acid sequence, and structure have made it difficult to obtain natural Ara h 6 free of Ara h 2. The objectives of this study were to purify natural Ara h 6 that is essentially free of Ara h 2 and to compare its IgE reactivity and potency in histamine release assays to Ara h 2. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis of the highly purified allergen (<0.01% Ara h 2) revealed a single 14.5 kD band, and the identity of Ara h 6 was confirmed by liquid chromatography-tandem mass spectrometry. Ara h 6 showed a higher seroprevalence in chimeric IgE enzyme-linked immunosorbent assay (n = 54) but a weaker biological activity in basophil histamine release assays than Ara h 2. Purified Ara h 6 will be useful for diagnostic IgE antibody assays as well as molecular and cellular studies to investigate the immunological mechanisms of peanut allergy.
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Affiliation(s)
- Audrey E Koid
- INDOOR Biotechnologies, Inc., 1216 Harris St, Charlottesville, VA 22903
| | - Martin D Chapman
- INDOOR Biotechnologies, Inc., 1216 Harris St, Charlottesville, VA 22903
| | - Robert G Hamilton
- Johns Hopkins University School of Medicine, 600 N Wolfe St #6-113, Baltimore, MD 21287
| | - Ronald van Ree
- Academic Medical Center, Meibergdreef 9, 1105 AZ Amsterdam-Zuidoost, The Netherlands
| | - Serge A Versteeg
- Academic Medical Center, Meibergdreef 9, 1105 AZ Amsterdam-Zuidoost, The Netherlands
| | - Stephen C Dreskin
- University of Colorado Denver, School of Medicine, 1250 14th St, Denver, CO 80202
| | | | - Sabina Wünschmann
- INDOOR Biotechnologies, Inc., 1216 Harris St, Charlottesville, VA 22903
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111
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Mattison CP, Grimm CC, Wasserman RL. In vitro digestion of soluble cashew proteins and characterization of surviving IgE-reactive peptides. Mol Nutr Food Res 2013; 58:884-93. [PMID: 24311529 DOI: 10.1002/mnfr.201300299] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Revised: 09/05/2013] [Accepted: 09/09/2013] [Indexed: 11/10/2022]
Abstract
SCOPE The stability of food allergens to digestion varies. We characterized the stability of cashew allergens to digestion by pepsin and trypsin and identified IgE-binding epitopes that survive digestion. METHODS AND RESULTS The ability of pepsin and trypsin to digest cashew allergens was assessed with an in vitro digestion model. Samples were evaluated by SDS-PAGE, MS, ELISA, and immunoblotting to compare IgE binding. Increasing amount of protease resulted in greater degradation of higher molecular weight cashew proteins. Among cashew proteins, the 2S albumin, Ana o 3, was most resistant to digestion by both pepsin and trypsin. MS identified digestion resistant Ana o 3 protein fragments that retained reported IgE-binding epitopes. Pretreatment of extracts or purified Ana o 3 with reducing agent increased the sensitivity of Ana o 3 to protease digestion. Circular dichroism revealed the structure of purified Ana o 3 was largely alphahelical and was disrupted following reduction. Ana o 3 reduction followed by protease digestion decreased binding of serum IgE from cashew allergic patients. Our results indicate that the Ana o 3 disulfide bond dependent structure protects the protein from proteolysis. CONCLUSION Ana o 3 is the cashew allergen most likely to survive gastrointestinal digestion intact.
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Affiliation(s)
- Christopher P Mattison
- U.S. Department of Agriculture, Agricultural Research Service, Southern Regional Research Center, New Orleans, LA, USA
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112
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Price D, Ackland L, Suphioglu C. Nuts 'n' guts: transport of food allergens across the intestinal epithelium. Asia Pac Allergy 2013; 3:257-65. [PMID: 24260731 PMCID: PMC3826608 DOI: 10.5415/apallergy.2013.3.4.257] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Accepted: 10/04/2013] [Indexed: 01/07/2023] Open
Abstract
The increase in the incidence of food allergy is a growing problem for the western world. This review will focus on the findings from several macromolecular epithelial transport experiments and drug permeability studies to provide a recent comprehension of food allergen intestinal epithelial cell transport and the allergen-epithelial relationship. Specifically, this review will aim to answer whether allergens can permeate the intestinal barrier directly via intestinal epithelial cells, and whether this mode of transport affects downstream immune reactions. By improving our understanding of the interactions which take place during exposure of food allergens with the intestinal epithelium, we can begin to understand whether the epithelial barrier plays a major role in the allergic sensitization process rather than simply restricting the entry of allergens to the underlying lamina propria.
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Affiliation(s)
- Dwan Price
- Centre for Cellular and Molecular Biology, School of Life and Environmental Sciences, Faculty of Science, Engineering and Built Environment, Deakin University, Burwood, VIC 3125, Australia. ; NeuroAllergy Research Laboratory, School of Life and Environmental Sciences, Faculty of Science, Engineering and Built Environment, Deakin University, Geelong, VIC 3216, Australia
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113
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Ebisawa M, Brostedt P, Sjölander S, Sato S, Borres MP, Ito K. Gly m 2S albumin is a major allergen with a high diagnostic value in soybean-allergic children. J Allergy Clin Immunol 2013; 132:976-8.e1-5. [PMID: 23763971 DOI: 10.1016/j.jaci.2013.04.028] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Revised: 03/21/2013] [Accepted: 04/12/2013] [Indexed: 10/26/2022]
Affiliation(s)
- Motohiro Ebisawa
- Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, Sagamihara, Japan.
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114
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de la Cruz S, López-Calleja IM, Alcocer M, González I, Martín R, García T. TaqMan real-time PCR assay for detection of traces of Brazil nut (Bertholletia excelsa) in food products. Food Control 2013. [DOI: 10.1016/j.foodcont.2013.01.053] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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115
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Chhabra G, Dixit A. Structure modeling and antidiabetic activity of a seed protein of Momordica charantia in non-obese diabetic (NOD) mice. Bioinformation 2013; 9:766-70. [PMID: 24023418 PMCID: PMC3766308 DOI: 10.6026/97320630009766] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Accepted: 08/09/2013] [Indexed: 11/23/2022] Open
Abstract
Momordica charantia is a well known medicinal plant used in the traditional medicinal system for the treatment of various diseases including diabetes mellitus. Recently, a novel protein termed as ADMc1 from the seed extract of M. charantia has been identified and isolated showing significant antihyperglycemic activity in type 1 diabetic rats in which diabetes was induced. However, the structure of this protein has not yet been analyzed. Homology modeling approach was used to generate a high quality protein 3D structure for the amino acid sequence of the ADMc1 protein in this study. The comparative assessment of secondary structures revealed ADMc1 as an all-alpha helix protein with random coils. Tertiary structure predicted on the template structure of Napin of B. Napus (PDB ID: 1SM7) with which the ADMc1 showed significant sequence similarity, was validated using protein structure validation tools like PROCHECK, WHAT_CHECK, VERIFY3D and ProSA. Arrangement of disulfide bridges formed by cysteine residues were predicted by the Dianna 1.1 server. The presence of multiple disulfide bond confers the stable nature of the ADMc1 protein. Further, the biological activity of the ADMc1 was assessed in non-obese diabetic (NOD) mice which are spontaneous model of type 1 diabetes. Significant reduction in the blood glucose levels of NOD mice was observed up to 8 h post administration of the rADMc1 protein. Overall, the structural characterizations with antihyperglycemic activity of this seed protein of Momordica charantia demonstrate its potential as an antidiabetic agent.
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Affiliation(s)
- Gagan Chhabra
- Gene Regulation Laboratory, School of Biotechnology, Jawaharlal Nehru University, New Delhi - 110067, India
| | - Aparna Dixit
- Gene Regulation Laboratory, School of Biotechnology, Jawaharlal Nehru University, New Delhi - 110067, India
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116
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Capraro J, Magni C, Faoro F, Maffi D, Scarafoni A, Tedeschi G, Maffioli E, Parolari A, Manzoni C, Lovati MR, Duranti M. Internalisation and multiple phosphorylation of γ-Conglutin, the lupin seed glycaemia-lowering protein, in HepG2 cells. Biochem Biophys Res Commun 2013; 437:648-52. [DOI: 10.1016/j.bbrc.2013.07.026] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2013] [Accepted: 07/09/2013] [Indexed: 10/26/2022]
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117
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Gómez E, Mayorga C, Gómez F, Blázquez AB, Díaz-Perales A, Blanca M, Torres MJ. Food allergy: management, diagnosis and treatment strategies. Immunotherapy 2013; 5:755-68. [DOI: 10.2217/imt.13.63] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Food allergy is an increasing problem in western countries, with strict avoidance being the only available reliable treatment. However, accidental ingestion can occur and anaphylactic reactions still happen. In recent years, many efforts have been made to better understand the humoral and cellular mechanisms involved in food allergy, and to improve the strategies for diagnosis and treatment. This review focuses on IgE-mediated food hypersensitivity and provides an overview of the diagnostic strategies and treatment advances. Specific immunotherapy, including different routes of administration and allergen sources, such as natural, recombinant and T-cell epitopes, are analyzed in detail. Other treatments such as anti-IgE monoclonal antibody therapy, adjuvant therapy and Chinese herbs will also be described.
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Affiliation(s)
- Enrique Gómez
- Research Laboratory for Allergic Diseases, Carlos Haya Hospital, Malaga, Spain
| | | | | | - Ana Belen Blázquez
- Research Laboratory for Allergic Diseases, Carlos Haya Hospital, Malaga, Spain
| | - Araceli Díaz-Perales
- Center for Plant Biotechnology & Genomics (UPM-INIA), Pozuelo de Alarcón, Madrid, Spain
| | - Miguel Blanca
- Allergy Service, Carlos Haya Hospital, Malaga, Spain
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118
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Nair DN, Singh V, Yamaguchi Y, Singh DD. Jatropha curcas hemagglutinin is similar to a 2S albumin allergen from the same source and has unique sugar affinities. PLANTA 2012; 236:1499-1505. [PMID: 22798079 DOI: 10.1007/s00425-012-1702-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2012] [Accepted: 06/25/2012] [Indexed: 06/01/2023]
Abstract
We have previously reported the purification and preliminary X-ray characterization of a hemagglutinin from the seeds of Jatropha curcas and, with the detailed sequencing information available now, we find that it is similar to a 2S albumin allergen isolated from the same source. Through a search of Jatropha genome database (http://www.kazusa.or.jp/jatropha/), we map it to the sequence id JcCA0234191 (now referred to as Jcr4S00619.70 in the new version, release 4.5) which has a conserved alpha amylase inhibitor/seed storage protein domain found in the 2S albumin allergens. The putative sequence of the small and large chains of the protein is assigned and the total mass of the two subunits matches with the intact mass 10 kDa determined through MALDI. The protein retains hemagglutination activity between pH 6-9 and up to 60 °C on heat treatment and its hemagglutination activity is inhibited by sialic acid and fetuin. Bioinformatics studies show that the isolated protein sequence clusters in close association with a 2S albumin from Ricinus communis in phylogeny analysis and has a conservation of the characteristic four disulfide linkage pattern. Hemagglutinins and lectins are known to have allergenic effects through their interaction with immunoglobulin E and histamine release and earlier studies have shown that this interaction can be inhibited by lectin-specific sugars. We hope this report bridges the plant allergens and hemagglutinins further for exploring possible mediation of allergenic activity through sialic acid and complex sugar interactions and generates further interest in the area.
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Affiliation(s)
- Divya N Nair
- Department of Bioinformatics and Structural Biology, Indian Institute of Advanced Research, Koba, Gandhinagar, 382007, Gujarat, India
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119
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Cabanillas B, Cheng H, Grimm CC, Hurlburt BK, Rodríguez J, Crespo JF, Maleki SJ. Pine nut allergy: clinical features and major allergens characterization. Mol Nutr Food Res 2012; 56:1884-93. [PMID: 23081934 DOI: 10.1002/mnfr.201200245] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Revised: 09/04/2012] [Accepted: 09/05/2012] [Indexed: 11/09/2022]
Abstract
SCOPE The aims of this study were to evaluate IgE-mediated hypersensitivity to pine nut with details of clinical reactions and to characterize major pine nut allergens. METHODS AND RESULTS The study included ten consecutive teenagers and adults diagnosed with IgE-mediated clinical allergy to pine nut. Two major pine nut allergens were purified and identified and the secondary structures and susceptibility to digestion were characterized. Severe reactions represent 80% of allergic reactions to pine nut in this study. Moreover, 70% of the patients were monosensitized to this nut. Two major allergens with molecular weights of 6 and 50 kDa were purified and identified as albumin and vicilin, respectively. The 6 kDa protein (albumin), rich in α-helix content, was far more stable to peptic and tryptic digestion as compared with 50 kDa protein (vicilin), which was quickly broken down. The secondary structure of the purified 50 kDa protein showed 41% β-sheet, 5% α-helix, and 54% random coil and/or loops. CONCLUSION Eighty percent of allergic reactions to pine nut in the ten patients included in this study were severe. Most patients (70%) were monosensitized to this nut. Two major allergens with molecular weights of 6 and 50 kDa were purified and identified as albumin and vicilin, respectively.
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Affiliation(s)
- Beatriz Cabanillas
- Servicio de Alergia, Hospital Universitario 12 de Octubre, Instituto de Investigación Hospital 12 de Octubre (i+12), Madrid, Spain.
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120
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Rundqvist L, Tengel T, Zdunek J, Björn E, Schleucher J, Alcocer MJC, Larsson G. Solution structure, copper binding and backbone dynamics of recombinant Ber e 1-the major allergen from Brazil nut. PLoS One 2012; 7:e46435. [PMID: 23056307 PMCID: PMC3464261 DOI: 10.1371/journal.pone.0046435] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Accepted: 08/29/2012] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND The 2S albumin Ber e 1 is the major allergen in Brazil nuts. Previous findings indicated that the protein alone does not cause an allergenic response in mice, but the addition of components from a Brazil nut lipid fraction were required. Structural details of Ber e 1 may contribute to the understanding of the allergenic properties of the protein and its potential interaction partners. METHODOLOGY/PRINCIPAL FINDINGS The solution structure of recombinant Ber e 1 was solved using NMR spectroscopy and measurements of the protein back bone dynamics at a residue-specific level were extracted using (15)N-spin relaxation. A hydrophobic cavity was identified in the structure of Ber e 1. Using the paramagnetic relaxation enhancement property of Cu(2+) in conjunction with NMR, it was shown that Ber e 1 is able to specifically interact with the divalent copper ion and the binding site was modeled into the structure. The IgE binding region as well as the copper binding site show increased dynamics on both fast ps-ns timescale as well as slower µs-ms timescale. CONCLUSIONS/SIGNIFICANCE The overall fold of Ber e 1 is similar to other 2S albumins, but the hydrophobic cavity resembles that of a homologous non-specific lipid transfer protein. Ber e 1 is the first 2S albumin shown to interact with Cu(2+) ions. This Cu(2+) binding has minimal effect on the electrostatic potential on the surface of the protein, but the charge distribution within the hydrophobic cavity is significantly altered. As the hydrophobic cavity is likely to be involved in a putative lipid interaction the Cu(2+) can in turn affect the interaction that is essential to provoke an allergenic response.
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Affiliation(s)
- Louise Rundqvist
- Department of Medical Biochemistry and Biophysics, Umeå University, Umeå, Sweden
| | - Tobias Tengel
- Department of Medical Biochemistry and Biophysics, Umeå University, Umeå, Sweden
| | - Janusz Zdunek
- Protein Constructor Developers Company, Umeå, Sweden
| | - Erik Björn
- Department of Chemistry, Umeå University, Umeå, Sweden
| | - Jürgen Schleucher
- Department of Medical Biochemistry and Biophysics, Umeå University, Umeå, Sweden
| | - Marcos J. C. Alcocer
- Department of Nutritional Sciences, University of Nottingham, Loughborough, United Kingdom
| | - Göran Larsson
- Department of Medical Biochemistry and Biophysics, Umeå University, Umeå, Sweden
- * E-mail:
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121
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Kumar S, Verma AK, Das M, Dwivedi PD. Allergenic Diversity among Plant and Animal Food Proteins. FOOD REVIEWS INTERNATIONAL 2012. [DOI: 10.1080/87559129.2011.635391] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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122
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Kulis M, Chen X, Lew J, Wang Q, Patel OP, Zhuang Y, Murray KS, Duncan MW, Porterfield HS, W Burks A, Dreskin SC. The 2S albumin allergens of Arachis hypogaea, Ara h 2 and Ara h 6, are the major elicitors of anaphylaxis and can effectively desensitize peanut-allergic mice. Clin Exp Allergy 2012; 42:326-36. [PMID: 22288514 DOI: 10.1111/j.1365-2222.2011.03934.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Ara h 2 and Ara h 6, co-purified together in a 13-25 kD fraction (Ara h 2/6; 20 kD fraction) on gel filtration chromatography, account for the majority of effector activity in a crude peanut extract (CPE) when assayed with RBL SX-38 cells sensitized with IgE from human peanut allergic sera. OBJECTIVES To determine if Ara h 2/6 are the primary peanut allergens responsible for allergic reactions in vivo and to determine if Ara h 2/6 would be sufficient to prevent allergic reactions to a complete CPE. METHODS An oral sensitization mouse model of peanut allergy was used to assess the activity of Ara h 2/6 (20 kD) and CPE without the 20 kD fraction (CPE w/o 20 kD) for allergic provocation challenge and immunotherapy. The activity of these preparations was also tested in an assay of histamine release from human basophils in whole blood. RESULTS Compared with mice challenged with control CPE, mice challenged with CPE w/o 20 kD experienced reduced symptoms (P < 0.05) and a smaller decrease in body temperature (P < 0.01). Results with the basophil histamine release assay corroborated these findings (P < 0.01). The mouse model was also used to administer Ara h 2/6 (20 kD) in an immunotherapy protocol, in which peanut-allergic mice treated with the 20 kD fraction experienced significantly reduced symptoms, changes in body temperature, and mast cell protease (MMCP-1) release compared with placebo (P < 0.01 for all parameters). Importantly, immunotherapy with the 20 kD fraction was just as effective as treatment with CPE, whereas CPE w/o 20 kD was significantly less effective for higher dose peanut challenges. CONCLUSIONS AND CLINICAL RELEVANCE Ara h 2/6 are the most potent peanut allergens in vivo and can be used to desensitize peanut-allergic mice. These results have potential implications for clinical research in the areas of diagnosis and immunotherapy for peanut allergy.
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Affiliation(s)
- M Kulis
- Department of Pediatric Allergy and Immunology, Duke University Medical Center, Durham, NC, USA
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Hazebrouck S, Guillon B, Drumare MF, Paty E, Wal JM, Bernard H. Trypsin resistance of the major peanut allergen Ara h 6 and allergenicity of the digestion products are abolished after selective disruption of disulfide bonds. Mol Nutr Food Res 2012; 56:548-57. [DOI: 10.1002/mnfr.201100614] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Stéphane Hazebrouck
- INRA, UR 496, Unité d’Immuno-Allergie Alimentaire, CEA/iBiTeC-S/SPI, CEA de Saclay; Gif-sur-Yvette France
| | - Blanche Guillon
- INRA, UR 496, Unité d’Immuno-Allergie Alimentaire, CEA/iBiTeC-S/SPI, CEA de Saclay; Gif-sur-Yvette France
| | - Marie-Françoise Drumare
- INRA, UR 496, Unité d’Immuno-Allergie Alimentaire, CEA/iBiTeC-S/SPI, CEA de Saclay; Gif-sur-Yvette France
| | - Evelyne Paty
- Université Paris Descartes Assistance Publique des Hôpitaux de Paris; Hôpital Necker Enfants Malades; Paris France
| | - Jean-Michel Wal
- INRA, UR 496, Unité d’Immuno-Allergie Alimentaire, CEA/iBiTeC-S/SPI, CEA de Saclay; Gif-sur-Yvette France
| | - Hervé Bernard
- INRA, UR 496, Unité d’Immuno-Allergie Alimentaire, CEA/iBiTeC-S/SPI, CEA de Saclay; Gif-sur-Yvette France
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Costa J, Mafra I, Carrapatoso I, Oliveira MBPP. Almond allergens: molecular characterization, detection, and clinical relevance. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:1337-1349. [PMID: 22260748 DOI: 10.1021/jf2044923] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Almond ( Prunus dulcis ) has been widely used in all sorts of food products (bakery, pastry, snacks), mostly due to its pleasant flavor and health benefits. However, it is also classified as a potential allergenic seed known to be responsible for triggering several mild to life-threatening immune reactions in sensitized and allergic individuals. Presently, eight groups of allergenic proteins have been identified and characterized in almond, namely, PR-10 (Pru du 1), TLP (Pru du 2), prolamins (Pru du 2S albumin, Pru du 3), profilins (Pru du 4), 60sRP (Pru du 5), and cupin (Pru du 6, Pru du γ-conglutin), although only a few of them have been tested for reactivity with almond-allergic sera. To protect sensitized individuals, labeling regulations have been implemented for foods containing potential allergenic ingredients, impelling the development of adequate analytical methods. This work aims to present an updated and critical overview of the molecular characterization and clinical relevance of almond allergens, as well as review the main methodologies used to detect and quantitate food allergens with special emphasis on almond.
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Affiliation(s)
- Joana Costa
- REQUIMTE, Laboratório de Bromatologia e Hidrologia, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal
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125
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Mousallem T, Burks AW. Immunology in the Clinic Review Series; focus on allergies: immunotherapy for food allergy. Clin Exp Immunol 2012; 167:26-31. [PMID: 22132881 DOI: 10.1111/j.1365-2249.2011.04499.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
There is no approved therapy for food allergy. The current standard of care is elimination of the triggering food from the diet and accessibility to epinephrine. Immunotherapy is a promising treatment approach. While desensitization to most foods seems feasible, it remains unclear if a permanent state of tolerance is achievable. The research team at Duke is pioneering immunotherapy for food allergies. Work here has evolved over time from small open-label pilot studies to larger randomized designs. Our data show that immunological changes associated with immunotherapy include reduction in mast cell reactivity, decreased basophil responses, decreased specific-immunoglobulin (Ig)E, increased IgG4 and induction of regulatory T cells. Immunotherapy has generated much excitement in the food allergy community; however, further studies are needed before it is ready for clinical use.
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Affiliation(s)
- T Mousallem
- Duke University Medical Center, Durham, NC 27710, USA
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126
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Alcocer M, Rundqvist L, Larsson G. Ber e 1 protein: the versatile major allergen from Brazil nut seeds. Biotechnol Lett 2011; 34:597-610. [PMID: 22187079 DOI: 10.1007/s10529-011-0831-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Accepted: 12/09/2011] [Indexed: 11/29/2022]
Abstract
Due mainly to its extremely high content of sulphur amino acids, Ber e 1 protein, the major allergen from Brazil nut, has attracted much scientific and press attention. Ber e 1 was the main target protein in early biotechnology transgenic work, in early processing studies of plant storage proteins, in plant vacuolar targeting studies and as the main protein in early nutritional supplementation experiments. Ber e 1 was also one of the first food allergens to be unintentionally transferred from one plant to another and was involved in the first reported case of systemic allergic reaction caused by a food allergen transferred in semen. In this review, many of the Ber e 1 unique biotechnological and structural functions are discussed with a particular emphasis on its use as model protein for studies of intrinsic allergenicity of food proteins.
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Affiliation(s)
- Marcos Alcocer
- Department of Nutritional Sciences, School of Biosciences, University of Nottingham, Sutton Bonington campus, Loughborough, LE12 5RD, UK.
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127
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Li Y, Kulis M, Pons L, Zhong XP, Burks AW. Peanut allergen Ara h 2-specific T cells are activated via Ras-Erk MAP kinase pathway signalling and identified by CD154 expression. FOOD AGR IMMUNOL 2011. [DOI: 10.1080/09540105.2011.579591] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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129
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Maria-Neto S, Honorato RV, Costa FT, Almeida RG, Amaro DS, Oliveira JTA, Vasconcelos IM, Franco OL. Bactericidal activity identified in 2S Albumin from sesame seeds and in silico studies of structure-function relations. Protein J 2011; 30:340-50. [PMID: 21691771 DOI: 10.1007/s10930-011-9337-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Pathogenic bacteria constitute an important cause of hospital-acquired infections. However, the misuse of available bactericidal agents has led to the appearance of antibiotic-resistant strains. Thus, efforts to seek new antimicrobials with different action mechanisms would have an enormous impact. Here, a novel antimicrobial protein (SiAMP2) belonging to the 2S albumin family was isolated from Sesamum indicum kernels and evaluated against several bacteria and fungi. Furthermore, in silico analysis was conducted in order to identify conserved residues through other 2S albumin antimicrobial proteins (2S-AMPs). SiAMP2 specifically inhibited Klebsiella sp. Specific regions in the molecule surface where cationic (RR/RRRK) and hydrophobic (MEYWPR) residues are exposed and conserved were proposed as being involved in antimicrobial activity. This study reinforces the hypothesis that plant storage proteins might also play as pathogen protection providing an insight into the mechanism of action for this novel 2S-AMP and evolutionary relations between antimicrobial activity and 2S albumins.
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Affiliation(s)
- Simone Maria-Neto
- Centro de Análises Proteômicas e Bioquímicas, Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, SGAN Quadra, Modulo B, Brasília, Distrito Federal, Brazil.
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130
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Albillos SM, Al-Taher F, Maks N. Increasing extractability of protein for allergen detection after food processing. Food Chem 2011. [DOI: 10.1016/j.foodchem.2011.02.019] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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131
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Cândido EDS, Pinto MFS, Pelegrini PB, Lima TB, Silva ON, Pogue R, Grossi-de-Sá MF, Franco OL. Plant storage proteins with antimicrobial activity: novel insights into plant defense mechanisms. FASEB J 2011; 25:3290-305. [PMID: 21746866 DOI: 10.1096/fj.11-184291] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Storage proteins perform essential roles in plant survival, acting as molecular reserves important for plant growth and maintenance, as well as being involved in defense mechanisms by virtue of their properties as insecticidal and antimicrobial proteins. These proteins accumulate in storage vacuoles inside plant cells, and, in response to determined signals, they may be used by the different plant tissues in response to pathogen attack. To shed some light on these remarkable proteins with dual functions, storage proteins found in germinative tissues, such as seeds and kernels, and in vegetative tissues, such as tubercles and leaves, are extensively discussed here, along with the related mechanisms of protein expression. Among these proteins, we focus on 2S albumins, Kunitz proteinase inhibitors, plant lectins, glycine-rich proteins, vicilins, patatins, tarins, and ocatins. Finally, the potential use of these molecules in development of drugs to combat human and plant pathogens, contributing to the development of new biotechnology-based medications and products for agribusiness, is also presented.
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Affiliation(s)
- Elizabete de Souza Cândido
- Centro de Análises Proteômicas e Bioquímicas, Universidade Católica de Brasília, Campus Avançado Asa Norte, SGAN 916 Avenida W5, CEP: 70790-160, Brasilia, DF, Brazil
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132
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Ribeiro SM, Almeida RG, Pereira CAA, Moreira JS, Pinto MFS, Oliveira AC, Vasconcelos IM, Oliveira JTA, Santos MO, Dias SC, Franco OL. Identification of a Passiflora alata Curtis dimeric peptide showing identity with 2S albumins. Peptides 2011; 32:868-74. [PMID: 20955745 DOI: 10.1016/j.peptides.2010.10.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Revised: 10/09/2010] [Accepted: 10/11/2010] [Indexed: 10/18/2022]
Abstract
Antifungal proteins and peptides, essential compounds for plant defense, have been isolated from several tissues of various plants. These proteins could be used as a natural alternative to control phytopathogenic fungi. In this report a heterodimeric antifungal protein named Pa-AFP1, showing higher identity with the 2S albumin family, was purified by using 70-100% ammonium sulfate saturation and further purification steps such as anionic exchange Q-Sepharose chromatography associated with HPLC reversed-phase C4 chromatography. Analysis by Tricine-SDS-PAGE revealed two peptidic molecular masses of approximately 4500 Da and 7000 Da, in the presence of β-mercaptoethanol, while by removing the reducing agent a single protein with molecular mass of about 11,500 Da was obtained. Moreover, dimer mass was confirmed by MALDI-TOF analyses (11,569.76 Da). The antifungal protein, named Pa-AFP1, efficiently inhibited the growth of filamentous fungi Colletotrichum gloeosporioides, and was added to a short list of 2S albumins with antimicrobial properties. Otherwise, this same peptide showed no activity toward bacteria and yeasts. In summary, this compound could be used in the future to develop biotechnological products for the control of phytopathogenic fungi.
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Affiliation(s)
- Suzana M Ribeiro
- Centro de Análise Proteômicas e Bioquímicas de Brasília, Universidade Católica de Brasília, Brasília, DF, Brazil
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133
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Sharma GM, Irsigler A, Dhanarajan P, Ayuso R, Bardina L, Sampson HA, Roux KH, Sathe SK. Cloning and characterization of 2S albumin, Car i 1, a major allergen in pecan. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:4130-4139. [PMID: 21395309 DOI: 10.1021/jf104319d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Although pecans are associated with IgE-mediated food allergies, the allergens responsible remain to be identified and characterized. The 2S albumin gene was amplified from the pecan cDNA library. Dot-blots were used to screen the recombinant protein with pecan allergic patients' serum. The affinity purified native protein was analyzed by Edman sequencing and mass spectrometry/mass spectrometry (MS/MS) analysis. Cross-reactivity with walnut was determined by inhibition enzyme-linked immunosorbent assay (ELISA). Sequential epitopes were determined by probing the overlapping peptides with three different patients' serum pool. The 3-dimensional homology model was generated, and the locations of the pecan epitopes were compared with those of known sequential epitopes on other allergenic tree nut homologues. Of 28 patients tested by dot-blot, 22 (79%) bound to 2S albumin, designated as Car i 1. Edman sequencing and the MS/MS sequencing of native 2S albumin confirmed the identity of recombinant (r) Car i 1. Both pecan and walnut protein extracts inhibited the IgE-binding to rCar i 1. Sequential epitope mapping indicated weak, moderate, and strong reactivity against 12, 7, and 5 peptides, respectively. Of the 11 peptides recognized by all serum pools, 5 peptides were strongly reactive and located in 3 discrete regions of the Car i 1 (amino acids 43-57, 67-78, and 106-120). Three-dimensional modeling revealed IgE-reactive epitopes to be solvent accessible and share significant homology with other tree nuts providing a possible basis for previously observed cross-reactivity.
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Affiliation(s)
- Girdhari M Sharma
- Department of Nutrition, Food and Exercise Sciences, The Florida State University, Tallahassee, Florida 32306, United States
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134
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Tandang-Silvas MRG, Tecson-Mendoza EM, Mikami B, Utsumi S, Maruyama N. Molecular Design of Seed Storage Proteins for Enhanced Food Physicochemical Properties. Annu Rev Food Sci Technol 2011; 2:59-73. [DOI: 10.1146/annurev-food-022510-133718] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mary Rose G. Tandang-Silvas
- Laboratory of Food Quality Design and Development, Graduate School of Agriculture, Kyoto University, Uji, Kyoto 611-0011, Japan;
| | - Evelyn Mae Tecson-Mendoza
- Institute of Plant Breeding, Crop Science Cluster, College of Agriculture, University of the Philippines Los Baños, College 4031, Laguna, Philippines
| | - Bunzo Mikami
- Laboratory of Basic and Applied Molecular Biotechnology, Graduate School of Agriculture, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Shigeru Utsumi
- Laboratory of Food Quality Design and Development, Graduate School of Agriculture, Kyoto University, Uji, Kyoto 611-0011, Japan;
| | - Nobuyuki Maruyama
- Laboratory of Food Quality Design and Development, Graduate School of Agriculture, Kyoto University, Uji, Kyoto 611-0011, Japan;
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135
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Garino C, Zuidmeer L, Marsh J, Lovegrove A, Morati M, Versteeg S, Schilte P, Shewry P, Arlorio M, van Ree R. Isolation, cloning, and characterization of the 2S albumin: a new allergen from hazelnut. Mol Nutr Food Res 2011; 54:1257-65. [PMID: 20373288 DOI: 10.1002/mnfr.200900456] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
SCOPE 2S albumins are the major allergens involved in severe food allergy to nuts, seeds, and legumes. We aimed to isolate, clone, and express 2S albumin from hazelnut and determine its allergenicity. METHODS 2S albumin from hazelnut extract was purified using size exclusion chromatography and RP-HPLC. After N-terminal sequencing, degenerated and poly-d(T) primers were used to clone the 2S albumin sequence from hazelnut cDNA. After expression in Escherichia coli and affinity purification, IgE reactivity was evaluated by Immunoblot/ImmunoCAP (inhibition) analyses using sera of nut-allergic patients. RESULTS N-terminal sequencing of a approximately 10 kDa peak from size exclusion chromatography/RP-HPLC gave two sequences highly homologous to pecan 2S albumin, an 11 amino acid (aa) N-terminal and a 10 aa internal peptide. The obtained clone (441 bp) encoded a 147 aa hazelnut 2S albumin consisting of a putative signal peptide (22 aa), a linker peptide (20 aa), and the mature protein sequence (105 aa). The latter was successfully expressed in E. coli. Both recombinant and natural 2S albumin demonstrated similar IgE reactivity in Immunoblot/ImmunoCAP (inhibition) analyses. CONCLUSION We confirmed the postulated role of hazelnut 2S albumin as an allergen. The availability of recombinant molecules will allow establishing the importance of hazelnut 2S albumin for hazelnut allergy.
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Affiliation(s)
- Cristiano Garino
- Università del Piemonte Orientale "A. Avogadro", DiSCAFF & Drug and Food Biotechnological Center, Novara, Italy
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136
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Kulis M, Vickery BP, Burks AW. Pioneering immunotherapy for food allergy: clinical outcomes and modulation of the immune response. Immunol Res 2010; 49:216-26. [DOI: 10.1007/s12026-010-8183-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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137
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Harrer A, Egger M, Gadermaier G, Erler A, Hauser M, Ferreira F, Himly M. Characterization of plant food allergens: An overview on physicochemical and immunological techniques. Mol Nutr Food Res 2009; 54:93-112. [DOI: 10.1002/mnfr.200900096] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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138
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Marín-Manzano MC, Ruiz R, Jiménez E, Rubio LA, Clemente A. Anti-carcinogenic soyabean Bowman-Birk inhibitors survive faecal fermentation in their active form and do not affect the microbiota composition in vitro. Br J Nutr 2009; 101:967-71. [PMID: 19353764 DOI: 10.1017/s0007114508057590] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Bowman-Birk inhibitor (BBI) from soyabeans is a naturally occurring protease inhibitor with potential anti-inflammatory and chemopreventive properties within the gastrointestinal tract (GIT). In a previous paper, we reported that significant amounts of BBI-related proteins reach the terminal ileum functionally and biologically active. We have now investigated: (a) if soyabean BBI is biotransformed by faecal microbiota which would reduce its potential colorectal chemopreventive properties and (b) the potential influence of this protease inhibitor on the modulation of faecal microbiota. In vitro incubation studies of native soyabean BBI at a physiological level (93 microM) with mixed faecal samples of pigs for 24 h at 37 degrees C demonstrated that BBI remains active and its intrinsic trypsin and chymotrypsin inhibitory activities were not significantly influenced by the enzymic or metabolic activity of faecal microbiota. Soyabean BBI did not affect the growth of the different bacterial groups studied (lactobacilli, bifidobacteria, bacteroides, coliforms, enterobacteria, clostridia and total anaerobes). It was concluded that protease inhibitory activities, intrinsically linked to the chemopreventive properties of soyabean BBI, were largely unaffected by faecal microbiota in vitro. BBI retains significance, therefore, as a bioactive compound in the human GIT.
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Affiliation(s)
- M Carmen Marín-Manzano
- Department of Biochemistry and Physiology of Animal Nutrition, Institute of Animal Nutrition, Estación Experimental del Zaidín (CSIC), Profesor Albareda 1, 18008 Granada, Spain
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