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Aydın ÇM, Çelikbıçak Ö, Hayaloğlu AA. Evaluation of antioxidant, antimicrobial, and bioactive properties and peptide sequence composition of Malatya apricot kernels. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024. [PMID: 38837418 DOI: 10.1002/jsfa.13632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 01/17/2024] [Accepted: 05/16/2024] [Indexed: 06/07/2024]
Abstract
BACKGROUND This study used four different apricot (Prunus armeniaca) kernels cultivated in Malatya during two consecutive years. The varieties were Hacihaliloglu, Hasanbey, Kabaasi, and Zerdali. The physicochemical properties of the kernels were determined, and the bioactive content of the kernels was evaluated using kernel hydrolysates prepared using trypsin. RESULTS With regard to the physicochemical properties of the kernels, the dry matter ratio and protein content were the highest in the Hacihaliloglu variety; the ash ratio was the highest in the Kabaasi variety, and the free oil ratio was the highest in the Hasanbey variety. The bioactive compound content changed according to kernel variety. Angiotensin-converting enzyme inhibitors activity was found to be the highest in the Hacihaliloglu and Hasanbey varieties, which had the lowest amygdalin content, and Zerdali had the highest amygdalin content. The antioxidant and antimicrobial effects of the kernels varied, with Hasanbey and Kabaasi generally having the highest content in both analyses. Moreover, a concentration of 20 mg mL-1 of the hydrolysate was determined to have a destructive effect for the microorganisms used in this study. The storage protein of the kernels, except Hacihaliloglu, was found to be Prunin 1, with the longest matching protein chain in the kernels being R.QQQGGQLMANGLEETFCSLRLK.E. CONCLUSION The results suggest that the peptide sequences identified in the kernels could have antihypertensive, antioxidative, and Dipeptidyl peptidase IV (DPP-IV) inhibitory effects. Consequently, apricot kernels show potential for use in the production of functional food products. Of the kernels evaluated in this study, Hacihaliloglu and Hasanbey were deemed the most suitable varieties due to their higher bioactive content and lower amygdalin content. © 2024 The Author(s). Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Çağlar Mert Aydın
- Food Processing Technology, Vocational High School, Munzur University, Tunceli, Türkiye
| | - Ömür Çelikbıçak
- Chemistry Department, Faculty of Science, Hacettepe University, Ankara, Türkiye
| | - Ali Adnan Hayaloğlu
- Food Engineering Department, Faculty of Engineering, Inonu University, Malatya, Türkiye
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2
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Garcia E, Koh J, Wu X, Sarkhosh A, Liu T. Tissue-specific proteome profile analysis reveals regulatory and stress responsive networks in passion fruit during storage. Sci Rep 2024; 14:3564. [PMID: 38346991 PMCID: PMC10861471 DOI: 10.1038/s41598-024-52557-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 01/20/2024] [Indexed: 02/15/2024] Open
Abstract
Passiflora edulis, commonly known as passion fruit, is a crop with a fragrant aroma and refreshingly tropical flavor that is a valuable source of antioxidants. It offers a unique opportunity for growers because of its adaptability to tropical and subtropical climates. Passion fruit can be sold in the fresh market or used in value-added products, but its postharvest shelf life has not been well-researched, nor have superior cultivars been well-developed. Understanding the proteins expressed at the tissue level during the postharvest stage can help improve fruit quality and extend shelf life. In this study, we carried out comparative proteomics analysis on four passion fruit tissues, the epicarp, mesocarp, endocarp, and pulp, using multiplexed isobaric tandem mass tag (TMT) labeling quantitation. A total of 3352 proteins were identified, including 295 differentially expressed proteins (DEPs). Of these DEPs, 213 showed a fold increase greater than 1.45 (50 proteins) or a fold decrease less than 0.45 (163 proteins) with different patterns among tissue types. Among the DEPs, there were proteins expressed with functions in oxygen scavenging, lipid peroxidation, response to heat stress, and pathogen resistance. Thirty-six proteins were designated as hypothetical proteins were characterized for potential functions in immunity, cell structure, homeostasis, stress response, protein metabolism and miraculin biosynthesis. This research provides insight into tissue-specific pathways that can be further studied within fruit physiology and postharvest shelf life to aid in implementing effective plant breeding programs. Knowing the tissue-specific function of fruit is essential for improving fruit quality, developing new varieties, identifying health benefits, and optimizing processing techniques.
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Affiliation(s)
- Ellen Garcia
- Horticultural Sciences Department, University of Florida, Gainesville, FL, 32611, USA
| | - Jin Koh
- The Interdisciplinary Center for Biotechnology Research, University of Florida, Gainesville, FL, 32611, USA
| | - Xingbo Wu
- Department of Environmental Horticulture, Tropical Research and Education Center, University of Florida, Homestead, FL, 33031, USA
| | - Ali Sarkhosh
- Horticultural Sciences Department, University of Florida, Gainesville, FL, 32611, USA.
| | - Tie Liu
- Horticultural Sciences Department, University of Florida, Gainesville, FL, 32611, USA.
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3
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Liu G, Hao M, Zeng B, Liu M, Wang J, Sun S, Liu C, Huilian C. Sialic acid and food allergies: The link between nutrition and immunology. Crit Rev Food Sci Nutr 2022; 64:3880-3906. [PMID: 36369942 DOI: 10.1080/10408398.2022.2136620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Food allergies (FA), a major public health problem recognized by the World Health Organization, affect an estimated 3%-10% of adults and 8% of children worldwide. However, effective treatments for FA are still lacking. Recent advances in glycoimmunology have demonstrated the great potential of sialic acids (SAs) in the treatment of FA. SAs are a group of nine-carbon α-ketoacids usually linked to glycoproteins and glycolipids as terminal glycans. They play an essential role in modulating immune responses and may be an effective target for FA intervention. As exogenous food components, sialylated polysaccharides have anti-FA effects. In contrast, as endogenous components, SAs on immunoglobulin E and immune cell surfaces contribute to the pathogenesis of FA. Given the lack of comprehensive information on the effects of SAs on FA, we reviewed the roles of endogenous and exogenous SAs in the pathogenesis and treatment of FA. In addition, we considered the structure-function relationship of SAs to provide a theoretical basis for the development of SA-based FA treatments.
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Affiliation(s)
- Guirong Liu
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Mengzhen Hao
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Binghui Zeng
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Manman Liu
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Junjuan Wang
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Shanfeng Sun
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Changqi Liu
- School of Exercise and Nutritional Sciences, College of Health and Human Services, San Diego State University, California, United States of America
| | - Che Huilian
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
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Kabasser S, Crvenjak N, Schmalz S, Kalic T, Hafner C, Dubiela P, Kucharczyk A, Bazan‐Socha S, Lukaszyk M, Breiteneder H, Radauer C, Bublin M. Pru du 1, the Bet v 1-homologue from almond, is a major allergen in patients with birch pollen associated almond allergy. Clin Transl Allergy 2022; 12:e12177. [PMID: 35949989 PMCID: PMC9358727 DOI: 10.1002/clt2.12177] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 06/10/2022] [Accepted: 06/24/2022] [Indexed: 11/16/2022] Open
Abstract
Background Almond allergy is common and can manifest in two different forms. Primary almond allergy has been reported to be associated with sensitization to almond legumin Pru du 6. In birchendemic regions, there is a link between birch-pollinosis which is likely based on a cross-reactive Bet v 1 homologue, a yet unidentified allergen in almond. Therefore, we sought to identify and characterize a Bet v 1-homologue in almond. Methods The expression of a Bet v 1 homologue in almond kernels was confirmed by mass spectrometry. The recombinant protein was produced in Escherichia coli and its cross-reactivity and allergenic potency was analyzed by IgE quantitative and competitive ELISA, immunoblotting and basophil histamine release using sera from 17 almond allergic patients. Results The identified Bet v 1 homologue received the designation Pru du 1.0101. Pru du 1.0101 bound IgE from 82 % of almond allergic patients. Bet v 1 was able to inhibit IgE-binding to rPru du 1 by 100%, while rPru du 1 inhibited IgE binding to rBet v 1 by 48%. Pru du 1.0101 activated basophils, though 100- to 1000-fold higher concentrations were required for maximum activation in comparison to rBet v 1. Conclusion Considering the strong inhibition capacity and higher allergenic potency of Bet v 1, the results provide compelling evidence for primary sensitization to Bet v 1 in case of birch pollen associated almond allergy. Combining Pru du 6 and Pru du 1 in diagnostic approaches may help to discriminate between primary and birch-pollen associated almond allergy.
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Affiliation(s)
- Stefan Kabasser
- Institute of Pathophysiology and Allergy ResearchCenter of PathophysiologyInfectiology and Immunology, Medical University of ViennaViennaAustria
| | - Nadja Crvenjak
- Institute of Pathophysiology and Allergy ResearchCenter of PathophysiologyInfectiology and Immunology, Medical University of ViennaViennaAustria
| | - Stefanie Schmalz
- Institute of Pathophysiology and Allergy ResearchCenter of PathophysiologyInfectiology and Immunology, Medical University of ViennaViennaAustria
| | - Tanja Kalic
- Institute of Pathophysiology and Allergy ResearchCenter of PathophysiologyInfectiology and Immunology, Medical University of ViennaViennaAustria
- Department of DermatologyUniversity Hospital St. PöltenKarl Landsteiner University of Health SciencesSt. PöltenAustria
| | - Christine Hafner
- Department of DermatologyUniversity Hospital St. PöltenKarl Landsteiner University of Health SciencesSt. PöltenAustria
- Karl Landsteiner Institute for Dermatological ResearchSt. PöltenAustria
| | - Pawel Dubiela
- Institute of Pathophysiology and Allergy ResearchCenter of PathophysiologyInfectiology and Immunology, Medical University of ViennaViennaAustria
- Department of Regenerative Medicine and Immune RegulationMedical University of BialystokBialystokPoland
| | - Aleksandra Kucharczyk
- Department of Internal Diseases, Pneumonology, AllergologyClinical Immunology, Military Institute of MedicineWarsawPoland
| | | | - Mateusz Lukaszyk
- Department of Lung Diseases and TuberculosisMedical University of BialystokBialystokPoland
| | - Heimo Breiteneder
- Institute of Pathophysiology and Allergy ResearchCenter of PathophysiologyInfectiology and Immunology, Medical University of ViennaViennaAustria
| | - Christian Radauer
- Institute of Pathophysiology and Allergy ResearchCenter of PathophysiologyInfectiology and Immunology, Medical University of ViennaViennaAustria
| | - Merima Bublin
- Institute of Pathophysiology and Allergy ResearchCenter of PathophysiologyInfectiology and Immunology, Medical University of ViennaViennaAustria
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5
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Kang W, Zhang J, Li H, Yu N, Tang R, Sun X, He L, Sun J, Chen Y. Identification of Major B-Cell Linear Epitopes of Peach Allergen Pru p 3 Using Immune Slot-Blot Microarray Assay. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:8134-8144. [PMID: 35749217 DOI: 10.1021/acs.jafc.2c01448] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Pru p 3, one of the most representative proteins of the lipid transfer proteins (LTPs), is responsible for clinical allergic reactions to food of peach origin. The identification of Pru p 3 epitopes is not comprehensive due to different methods and principles of epitope screening. In addition, evaluation of the stability of the epitopes and the validation of the immunological key amino acids still need further research. Therefore, in the present study, an immune slot-blot microarray assay was performed to screen the epitopes from Pru p 3 overlapping peptide library, and a new epitope (P-1, AA1-16, ITCGQVSSALAPCIPY) was identified and two identified epitopes were deeply investigated (P-2, AA12-27, PCIPYVRGGGAVPPAC; P-3, AA23-38, VPPACCNGIRNVNNLA). The stability of these epitopes was then verified by thermal processing treatment and digestion experiments. Moreover, the key amino acids of the three identified epitopes were obtained by epitope amino acid mutation combined with slot-blot experiments. These findings may contribute to the further understanding of Pru p 3 and the prevention of peach allergy.
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Affiliation(s)
- Wenhan Kang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Foods, School of Food Science Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi 214122, People's Republic of China
- Chinese Academy of Inspection and Quarantine, Beijing 100176, People's Republic of China
| | - Jiukai Zhang
- Chinese Academy of Inspection and Quarantine, Beijing 100176, People's Republic of China
| | - Hong Li
- Allergy Department, State Key Laboratory of Complex Severe and Rare Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing 100730, People's Republic of China
| | - Ning Yu
- Chinese Academy of Inspection and Quarantine, Beijing 100176, People's Republic of China
| | - Rui Tang
- Allergy Department, State Key Laboratory of Complex Severe and Rare Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing 100730, People's Republic of China
| | - Xiulan Sun
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Foods, School of Food Science Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Lei He
- Chinese Academy of Inspection and Quarantine, Beijing 100176, People's Republic of China
| | - Jinlyu Sun
- Allergy Department, State Key Laboratory of Complex Severe and Rare Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing 100730, People's Republic of China
| | - Ying Chen
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Foods, School of Food Science Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi 214122, People's Republic of China
- Chinese Academy of Inspection and Quarantine, Beijing 100176, People's Republic of China
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6
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Kang W, Zhang J, Li H, Yu N, Tang R, Sun X, Wei L, Sun J, Chen Y. Quantification of major allergens in peach based on shotgun proteomics using liquid chromatography-tandem mass spectrometry. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113234] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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7
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Abstract
This review provides a global overview on Rosaceae allergy and details the particularities of each fruit allergy induced by ten Rosaceae species: almond/peach/cherry/apricot/plum (Amygdaleae), apple/pear (Maleae), and raspberry/blackberry/strawberry (Rosoideae). Data on clinical symptoms, prevalence, diagnosis, and immunotherapies for the treatment of Rosaceae allergy are herein stated. Allergen molecular characterization, cross-reactivity/co-sensitization phenomena, the impact of food processing and digestibility, and the methods currently available for the Rosaceae detection/quantification in foods are also described. Rosaceae allergy has a major impact in context to pollen-food allergy syndrome (PFAS) and lipid transfer protein (LTP) allergies, being greatly influenced by geography, environment, and presence of cofactors. Peach, apple, and almond allergies are probably the ones most affecting the quality of life of the allergic-patients, although allergies to other Rosaceae fruits cannot be overlooked. From patients' perspective, self-allergy management and an efficient avoidance of multiple fruits are often difficult to achieve, which might raise the risk for cross-reactivity and co-sensitization phenomena and increase the severity of the induced allergic responses with time. At this point, the absence of effective allergy diagnosis (lack of specific molecular markers) and studies advancing potential immunotherapies are some gaps that certainly will prompt the progress on novel strategies to manage Rosaceae food allergies.
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Affiliation(s)
- Joana Costa
- REQUIMTE-LAQV, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal
| | - Isabel Mafra
- REQUIMTE-LAQV, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal
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8
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Dastmalchi M. Elusive partners: a review of the auxiliary proteins guiding metabolic flux in flavonoid biosynthesis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 108:314-329. [PMID: 34318549 DOI: 10.1111/tpj.15446] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 07/20/2021] [Accepted: 07/22/2021] [Indexed: 06/13/2023]
Abstract
Flavonoids are specialized metabolites widely distributed across the plant kingdom. They are involved in the growth and survival of plants, conferring the ability to filter ultra-violet rays, conduct symbiotic partnerships, and respond to stress. While many branches of flavonoid biosynthesis have been resolved, recent discoveries suggest missing auxiliary components. These overlooked elements can guide metabolic flux, enhance production, mediate stereoselectivity, transport intermediates, and exert regulatory functions. This review describes several families of auxiliary proteins from across the plant kingdom, including examples from specialized metabolism. In flavonoid biosynthesis, we discuss the example of chalcone isomerase-like (CHIL) proteins and their non-catalytic role. CHILs mediate the cyclization of tetraketides, forming the chalcone scaffold by interacting with chalcone synthase (CHS). Loss of CHIL activity leads to derailment of the CHS-catalyzed reaction and a loss of pigmentation in fruits and flowers. Similarly, members of the pathogenesis-related 10 (PR10) protein family have been found to differentially bind flavonoid intermediates, guiding the composition of anthocyanins. This role comes within a larger body of PR10 involvement in specialized metabolism, from outright catalysis (e.g., (S)-norcoclaurine synthesis) to controlling stereochemistry (e.g., enhancing cis-trans cyclization in catnip). Both CHILs and PR10s hail from larger families of ligand-binding proteins with a spectrum of activity, complicating the characterization of their enigmatic roles. Strategies for the discovery of auxiliary proteins are discussed, as well as mechanistic models for their function. Targeting such unanticipated components will be crucial in manipulating plants or engineering microbial systems for natural product synthesis.
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Affiliation(s)
- Mehran Dastmalchi
- Department of Plant Science, McGill University, Sainte-Anne-de-Bellevue, Québec, H9X 3V9, Canada
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9
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Eidelpes R, Hofer F, Röck M, Führer S, Kamenik AS, Liedl KR, Tollinger M. Structure and Zeatin Binding of the Peach Allergen Pru p 1. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:8120-8129. [PMID: 34260238 PMCID: PMC8323099 DOI: 10.1021/acs.jafc.1c01876] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Revised: 06/18/2021] [Accepted: 07/02/2021] [Indexed: 05/29/2023]
Abstract
Peach (Prunus persica) is among the fruits most frequently reported to cause food allergies. Allergic reactions commonly result from previous sensitization to the birch pollen allergen Bet v 1, followed by immunological cross-reactivity of IgE antibodies to structurally related proteins in peach. In this study, we present the three-dimensional NMR solution structure of the cross-reactive peach allergen Pru p 1 (isoform Pru p 1.0101). This 17.5 kDa protein adopts the canonical Bet v 1 fold, composed of a seven-stranded β-sheet and three α-helices enclosing an internal cavity. In Pru p 1, the inner surface of the cavity contains an array of hydroxyl-bearing amino acids surrounded by a hydrophobic patch, constituting a docking site for amphiphilic molecules. NMR-guided docking of the cytokinin molecule zeatin to the internal cavity of Pru p 1 provides a structure-based rationale for the effect that zeatin binding has on the protein's RNase activity.
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Affiliation(s)
- Reiner Eidelpes
- Institute
of Organic Chemistry, Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Innrain 80/82, A-6020 Innsbruck, Austria
| | - Florian Hofer
- Institute
of General, Inorganic and Theoretical Chemistry, Center for Molecular
Biosciences Innsbruck (CMBI), University
of Innsbruck, Innrain 80/82, A-6020 Innsbruck, Austria
| | - Manuel Röck
- Institute
of Organic Chemistry, Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Innrain 80/82, A-6020 Innsbruck, Austria
| | - Sebastian Führer
- Institute
of Organic Chemistry, Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Innrain 80/82, A-6020 Innsbruck, Austria
| | - Anna Sophia Kamenik
- Institute
of General, Inorganic and Theoretical Chemistry, Center for Molecular
Biosciences Innsbruck (CMBI), University
of Innsbruck, Innrain 80/82, A-6020 Innsbruck, Austria
| | - Klaus R. Liedl
- Institute
of General, Inorganic and Theoretical Chemistry, Center for Molecular
Biosciences Innsbruck (CMBI), University
of Innsbruck, Innrain 80/82, A-6020 Innsbruck, Austria
| | - Martin Tollinger
- Institute
of Organic Chemistry, Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Innrain 80/82, A-6020 Innsbruck, Austria
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10
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An Updated Overview of Almond Allergens. Nutrients 2021; 13:nu13082578. [PMID: 34444737 PMCID: PMC8399460 DOI: 10.3390/nu13082578] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 07/21/2021] [Accepted: 07/23/2021] [Indexed: 12/19/2022] Open
Abstract
Tree nuts are considered an important food in healthy diets. However, for part of the world’s population, they are one of the most common sources of food allergens causing acute allergic reactions that can become life-threatening. They are part of the Big Eight food groups which are responsible for more than 90% of food allergy cases in the United States, and within this group, almond allergies are persistent and normally severe and life-threatening. Almond is generally consumed raw, toasted or as an integral part of other foods. Its dietary consumption is generally associated with a reduced risk of cardiovascular diseases. Several almond proteins have been recognized as allergens. Six of them, namely Pru du 3, Pru du 4, Pru du 5, Pru du 6, Pru du 8 and Pru du 10, have been included in the WHO-IUIS list of allergens. Nevertheless, further studies are needed in relation to the accurate characterization of the already known almond allergens or putative ones and in relation to the IgE-binding properties of these allergens to avoid misidentifications. In this context, this work aims to critically review the almond allergy problematic and, specifically, to perform an extensive overview regarding known and novel putative almond allergens.
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11
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Jin J, Gan K, Zhao L, Jia H, Zhu Y, Li X, Yang Z, Ye Z, Cao K, Wang Z, Yu M, Zhang Y, Ma Z, Liu H, Arús P, Akkerdaas JH, Gao Z, van Ree R. Peach allergen Pru p 1 content is generally low in fruit but with large variation in different varieties. Clin Transl Allergy 2021; 11:e12034. [PMID: 34025984 PMCID: PMC8120414 DOI: 10.1002/clt2.12034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 04/05/2021] [Accepted: 04/26/2021] [Indexed: 01/22/2023] Open
Abstract
Background Pru p 1 is a major allergen in peach and nectarine, and the different content in varieties may affect the degree of allergic reactions. This study aimed to quantify Pru p 1 levels in representative peach varieties and select hypoallergenic Pru p 1 varieties. Methods To obtain monoclonal and polyclonal antibodies, mice and rabbits, respectively, were immunized with recombinant Pru p 1.01 and Pru p 1.02. The Pru p 1 levels in fruits from 83 representative peach varieties was quantified by sandwich enzyme-linked immunosorbent assay (sELISA). nPru p 1 was obtained through specific monoclonal antibody affinity purification and confirmed by Western blot and mass spectrometry. The variable Pru p 1 content of selected varieties was evaluated by Western blot and the expression level of encoding Pru p 1 genes by quantitative polymerase chain reaction. Results A sELISA method with monoclonal and polyclonal antibodies was built for quantifying Pru p 1 levels in peach. Pru p 1 was mainly concentrated in the peel (0.20-73.44 μg/g, fresh weight), being very low in the pulp (0.05-9.62 μg/g) and not detected in wild peach. For the 78 peach and nectarine varieties, Pru p 1 content varied widely from 0.12 to 6.45 μg/g in whole fruit. We verified that natural Pru p 1 is composed of 1.01 and 1.02 isoallergens, and the Pru p 1 expression level and Pru p 1 band intensity in the immunoblots were in agreement with protein quantity determined by ELISA for some tested varieties. In some cases, the reduced levels of Pru p 1 did not coincide with low Pru p 3 in the same variety in whole fruit, while some ancient wild peach and nectarines contained low levels of both allergens, and late-ripening yellow flesh varieties were usually highly allergenic. Conclusion Pru p 1 content is generally low in peach compared to Pru p 3. Several hypoallergenic Pru p 1 and Pru p 3 varieties, "Zi Xue Tao," "Wu Yue Xian," and "May Fire," were identified, which could be useful in trials for peach allergy patients.
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Affiliation(s)
- Jing Jin
- Allergy Research Center Zhejiang University Hangzhou China.,College of Agriculture and Biotechnology Zhejiang University Hangzhou China
| | - Kexin Gan
- College of Agriculture and Biotechnology Zhejiang University Hangzhou China
| | - Lan Zhao
- Allergy Research Center Zhejiang University Hangzhou China.,College of Agriculture and Biotechnology Zhejiang University Hangzhou China
| | - Huijuan Jia
- College of Agriculture and Biotechnology Zhejiang University Hangzhou China
| | - Yifan Zhu
- College of Agriculture and Biotechnology Zhejiang University Hangzhou China
| | - Xiongwei Li
- Forest & Fruit Tree Institute Shanghai Academy of Agricultural Sciences Shanghai China
| | - Zhaowei Yang
- State Key Laboratory of Respiratory Disease The First Affiliated Hospital of Guangzhou Medical University Guangzhou China
| | - Zhengwen Ye
- Forest & Fruit Tree Institute Shanghai Academy of Agricultural Sciences Shanghai China
| | - Ke Cao
- Zhengzhou Fruit Research Institute China Academy of Agricultural Sciences Zhengzhou China
| | - Zhiqiang Wang
- Zhengzhou Fruit Research Institute China Academy of Agricultural Sciences Zhengzhou China
| | - Mingliang Yu
- Fruit Tree Institute Jiangsu Academy of Agricultural Sciences Nanjing China
| | - Yuyan Zhang
- Fruit Tree Institute Jiangsu Academy of Agricultural Sciences Nanjing China
| | - Zhisheng Ma
- Shijiazhuang Pomology Institute Hebei Academy of Agriculture and Forestry Sciences Shijiazhuang Hebei China
| | - Hangkong Liu
- College of Horticulture Northwest A&F University Yangling Shaanxi China
| | - Pere Arús
- IRTA Centre de Recerca en Agrigenòmica CSIC-IRTA-UAB-UB Campus UAB - Edifici CRAG Barcelona Spain
| | - Jaap H Akkerdaas
- Departments of Experimental Immunology and Otorhinolaryngology Amsterdam UMC University of Amsterdam Amsterdam The Netherlands
| | - Zhongshan Gao
- Allergy Research Center Zhejiang University Hangzhou China.,College of Agriculture and Biotechnology Zhejiang University Hangzhou China.,Departments of Experimental Immunology and Otorhinolaryngology Amsterdam UMC University of Amsterdam Amsterdam The Netherlands
| | - Ronald van Ree
- Departments of Experimental Immunology and Otorhinolaryngology Amsterdam UMC University of Amsterdam Amsterdam The Netherlands
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Zhang Y, Jin T. Almond allergens: update and perspective on identification and characterization. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2020; 100:4657-4663. [PMID: 32270879 DOI: 10.1002/jsfa.10417] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 04/01/2020] [Accepted: 04/09/2020] [Indexed: 06/11/2023]
Abstract
Almond (Prunus dulcis) is not only widely used as a human food as a result of its flavor, nutrients, and health benefits, but it is also one of the most likely tree nuts to trigger allergies. Almond allergens, however, have not been studied as extensively as those of peanuts and other selected tree nuts. This review provides an update of the molecular properties of almond allergens to clarify some confusion about the identities of almond allergens and our perspective on characterizing putative almond allergens. At present, the following almond allergens have been designated by the World Health Organization/International Union of Immunological Societies Allergen Nomenclature Sub-Committee: Pru du 3 (a non-specific lipid transfer protein 1, nsLTP1), Pru du 4 (a profilin), Pru du 5 (60S acidic ribosomal protein 2), Pru du 6 (an 11S legumin known as prunin) and Pru du 8 (an antimicrobial protein with cC3C repeats). Besides, almond vicilin and almond γ-conglutin have been identified as food allergens, although further characterization of these allergens is still of interest. In addition, almond 2S albumin was reported as a food allergen as a result of the misidentification of Pru du 8. Two more almond proteins have been called allergens based on their sequence homology with known food allergens and their 'membership' in relevant protein families that contain allergens in many species. These include the pathogenesis related-10 protein (referred to as Pru du 1) and the thaumatin-like protein (referred to as Pru du 2). Almonds thus have five known food allergens and five more likely ones that need to be investigated further. Published 2020. This article is a U.S. Government work and is in the public domain in the USA.
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Affiliation(s)
- Yuzhu Zhang
- U.S. Department of Agriculture, Agricultural Research Service, Pacific West Area, Western Regional Research Center, Albany, CA, USA
| | - Tengchuan Jin
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
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Pitre M, L’Hocine L, Achouri A, Blaquière M, Des Roches A. Immunoglobulin E-Binding Pattern of Canadian Peanut Allergic Children and Cross-Reactivity with Almond, Hazelnut and Pistachio. Biomolecules 2020; 10:E1091. [PMID: 32707944 PMCID: PMC7464554 DOI: 10.3390/biom10081091] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/17/2020] [Accepted: 07/20/2020] [Indexed: 12/24/2022] Open
Abstract
Peanut allergic individuals can be both co-sensitized and co-allergic to peanut and tree nuts. At the moment, standard diagnostic approaches do not always allow differentiation between clinically relevant sensitization and nonsignificant cross-reactions, and the responsibility of each allergen remains unclear. The objective of this study was therefore to determine a peanut sensitization profile in a cohort of Canadian peanut allergic children and assess the immunoglobulin E (IgE) molecular cross-reactivity between peanut, almond, hazelnut and pistachio. The specific IgE (sIgE) levels of each patient serum were determined by ImmunoCAP, indirect ELISA and immunoblot to examine their sIgE-binding levels and profiles to peanut proteins. Reciprocal inhibition ELISA and immunoblotting were used to study sIgE cross-reactions between peanut and the selected tree nuts using an adjusted and representative serum pool of the nine allergic patients. The results showed that the prepared peanut and tree nut protein extracts allowed for the detection of the majority of peanut and selected tree nut known allergens. The reciprocal inhibition ELISA experiments showed limited sIgE cross-reactivities between peanut and the studied tree nuts, with peanut being most likely the sensitizing allergen and tree nuts the cross-reactive ones. In the case of hazelnut and pistachio, a coexisting primary sensitization to hazelnut and pistachio was also demonstrated in the serum pool. Reciprocal inhibition immunoblotting further revealed that storage proteins (2S albumin, 7S vicilin and 11S legumin) could possibly account for the observed IgE-cross-reactions between peanut and the studied tree nuts in this cohort of allergic individuals. It also demonstrated the importance of conformational epitopes in the exhibited cross-reactions.
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Affiliation(s)
- Mélanie Pitre
- Saint-Hyacinthe Research and Development Centre, Agriculture and Agri-Food Canada, 3600 Casavant Blvd. W. Saint-Hyacinthe, QC J2S 8E3, Canada; (M.P.); (A.A.)
| | - Lamia L’Hocine
- Saint-Hyacinthe Research and Development Centre, Agriculture and Agri-Food Canada, 3600 Casavant Blvd. W. Saint-Hyacinthe, QC J2S 8E3, Canada; (M.P.); (A.A.)
| | - Allaoua Achouri
- Saint-Hyacinthe Research and Development Centre, Agriculture and Agri-Food Canada, 3600 Casavant Blvd. W. Saint-Hyacinthe, QC J2S 8E3, Canada; (M.P.); (A.A.)
| | - Martin Blaquière
- Sherbrooke University Hospital Center, Hôtel-Dieu de Sherbrooke, Department of Pediatrics, 580 Bowen south, Sherbrooke, QC J1G 2E3, Canada;
| | - Anne Des Roches
- Immunoallergy and Rheumatology Service Department of Pediatrics Medical School CHU Sainte-Justine Institution, 3175 Côte Sainte-Catherine, Montreal, QC H3T 1C5, Canada;
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Aranzana MJ, Decroocq V, Dirlewanger E, Eduardo I, Gao ZS, Gasic K, Iezzoni A, Jung S, Peace C, Prieto H, Tao R, Verde I, Abbott AG, Arús P. Prunus genetics and applications after de novo genome sequencing: achievements and prospects. HORTICULTURE RESEARCH 2019; 6:58. [PMID: 30962943 PMCID: PMC6450939 DOI: 10.1038/s41438-019-0140-8] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 03/10/2019] [Accepted: 03/13/2019] [Indexed: 05/04/2023]
Abstract
Prior to the availability of whole-genome sequences, our understanding of the structural and functional aspects of Prunus tree genomes was limited mostly to molecular genetic mapping of important traits and development of EST resources. With public release of the peach genome and others that followed, significant advances in our knowledge of Prunus genomes and the genetic underpinnings of important traits ensued. In this review, we highlight key achievements in Prunus genetics and breeding driven by the availability of these whole-genome sequences. Within the structural and evolutionary contexts, we summarize: (1) the current status of Prunus whole-genome sequences; (2) preliminary and ongoing work on the sequence structure and diversity of the genomes; (3) the analyses of Prunus genome evolution driven by natural and man-made selection; and (4) provide insight into haploblocking genomes as a means to define genome-scale patterns of evolution that can be leveraged for trait selection in pedigree-based Prunus tree breeding programs worldwide. Functionally, we summarize recent and ongoing work that leverages whole-genome sequences to identify and characterize genes controlling 22 agronomically important Prunus traits. These include phenology, fruit quality, allergens, disease resistance, tree architecture, and self-incompatibility. Translationally, we explore the application of sequence-based marker-assisted breeding technologies and other sequence-guided biotechnological approaches for Prunus crop improvement. Finally, we present the current status of publically available Prunus genomics and genetics data housed mainly in the Genome Database for Rosaceae (GDR) and its updated functionalities for future bioinformatics-based Prunus genetics and genomics inquiry.
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Affiliation(s)
- Maria José Aranzana
- IRTA, Centre de Recerca en Agrigenòmica CSIC-IRTA-UAB-UB, Campus UAB, Edifici CRAG, Cerdanyola del Vallès (Bellaterra), 08193 Barcelona, Spain
| | - Véronique Decroocq
- UMR 1332 BFP, INRA, University of Bordeaux, A3C and Virology Teams, 33882 Villenave-d’Ornon Cedex, France
| | - Elisabeth Dirlewanger
- UMR 1332 BFP, INRA, University of Bordeaux, A3C and Virology Teams, 33882 Villenave-d’Ornon Cedex, France
| | - Iban Eduardo
- IRTA, Centre de Recerca en Agrigenòmica CSIC-IRTA-UAB-UB, Campus UAB, Edifici CRAG, Cerdanyola del Vallès (Bellaterra), 08193 Barcelona, Spain
| | - Zhong Shan Gao
- Allergy Research Center, Zhejiang University, 310058 Hangzhou, China
| | | | - Amy Iezzoni
- Department of Horticulture, Michigan State University, 1066 Bogue Street, East Lansing, MI 48824-1325 USA
| | - Sook Jung
- Department of Horticulture, Washington State University, Pullman, WA 99164-6414 USA
| | - Cameron Peace
- Department of Horticulture, Washington State University, Pullman, WA 99164-6414 USA
| | - Humberto Prieto
- Biotechnology Laboratory, La Platina Research Station, Instituto de Investigaciones Agropecuarias, Santa Rosa, 11610 La Pintana, Santiago Chile
| | - Ryutaro Tao
- Laboratory of Pomology, Graduate School of Agriculture, Kyoto University, Kyoto, 606-8502 Japan
| | - Ignazio Verde
- Consiglio per la ricerca in agricoltura e l’analisi dell’economia agraria (CREA) – Centro di ricerca Olivicoltura, Frutticoltura e Agrumicoltura (CREA-OFA), Rome, Italy
| | - Albert G. Abbott
- University of Kentucky, 106 T. P. Cooper Hall, Lexington, KY 40546-0073 USA
| | - Pere Arús
- IRTA, Centre de Recerca en Agrigenòmica CSIC-IRTA-UAB-UB, Campus UAB, Edifici CRAG, Cerdanyola del Vallès (Bellaterra), 08193 Barcelona, Spain
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15
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Führer S, Trimmel S, Breuker K, Tollinger M. NMR resonance assignments of the pathogenesis-related peach allergen Pru p 1.0101. BIOMOLECULAR NMR ASSIGNMENTS 2019; 13:127-130. [PMID: 30542820 PMCID: PMC6439177 DOI: 10.1007/s12104-018-9864-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 12/06/2018] [Indexed: 05/13/2023]
Abstract
In Europe, Northern America, and China a large number of individuals are suffering from peach (Prunus persica) allergy caused by the protein Pru p 1. Immunologic reactions against this 17.5 kDa protein result from initial sensitization to the birch (Betula verrucosa) pollen allergen Bet v 1 and subsequent immunologic cross-reactivity of Bet v 1 specific antibodies. Allergic symptoms typically include severe itching, scratching of the throat, and rhino conjunctivitis. So far, experimental structural data for the peach allergen Pru p 1 are not available. In a first step towards the elucidation of the structure of this protein we assigned backbone and side chain 1H, 13C, and 15N chemical shifts of the naturally occurring isoform Pru p 1.0101 by solution NMR spectroscopy. Our chemical shift data indicate that this protein fold consists of seven β-strands separated by two short α-helices and a long C-terminal α-helix, which is in accordance with the reported crystal structure of Bet v 1. Our data provide the basis for determining the three-dimensional solution structure of this protein and to characterize its immunologic cross-reactivity on a structural basis.
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Affiliation(s)
- Sebastian Führer
- Institute of Organic Chemistry and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria
| | - Simone Trimmel
- Institute of Organic Chemistry and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria
| | - Kathrin Breuker
- Institute of Organic Chemistry and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria
| | - Martin Tollinger
- Institute of Organic Chemistry and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria.
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16
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Besbes F, Franz-Oberdorf K, Schwab W. Phosphorylation-dependent ribonuclease activity of Fra a 1 proteins. JOURNAL OF PLANT PHYSIOLOGY 2019; 233:1-11. [PMID: 30572279 DOI: 10.1016/j.jplph.2018.12.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 12/06/2018] [Accepted: 12/06/2018] [Indexed: 05/24/2023]
Abstract
Abiotic and biotic stress situations cause the upregulation of the transcription of a number of plant defence genes. They code for so-called pathogenesis-related (PR) proteins such as PR proteins of class-10 (PR-10), whose biological functions are still unclear. PR10 proteins are members of the Bet v 1 (major birch pollen allergen) superfamily including related proteins from the cultivated strawberry Fragaria × ananassa (Fra a 1 proteins). Here, we analyzed the expression of 21 Fra a 1 genes in different tissues of the strawberry plant by quantitative real-time PCR. Thirteen members were mainly expressed in roots, three in stems, two in red fruits and leaves, and one in flowers. Five genes (Fra a 1.04-1.08) were selected based on their expression profiles, heterologously expressed in Escherichia coli, and their recombinant proteins functionally characterized. Ribonuclease activity, demonstrated by in-solution and in-gel RNA degradation assays, indicated complete hydrolysis of RNA only by Fra a 1.06. Moreover, phosphorylation assays showed that except for Fra a 1.06, the remaining four recombinant proteins were phosphorylated. Consequently, we investigated whether the phosphorylation status of the proteins affects their ribonuclease activity. Using an in-solution as well as an in-gel RNase activity assay, results demonstrated that the four recombinant proteins, dephosphorylated with phosphatases, exhibited ribonucleolytic activity against total RNA. Thus, the PR10 related proteins characterized in this study harbour a phosphorylation-dependent RNase activity. The results shed new light on the assumed function of PR10 proteins in plant defence.
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Affiliation(s)
- Fatma Besbes
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Germany
| | - Katrin Franz-Oberdorf
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Germany
| | - Wilfried Schwab
- Biotechnology of Natural Products, Technische Universität München, 85354 Freising, Germany.
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17
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Ma Y, Zhao X, Ren H, Wu H, Guo M, Zhang Y, He Z, Han J, Tong R. Significant Reduction of the Expression of Peach ( Prunus persica L. Batsch) Allergen-Encoding Genes by Fruit Bagging with Opaque Paper. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:4051-4061. [PMID: 29634265 DOI: 10.1021/acs.jafc.8b00207] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Freshly consumed peaches ( Prunus persica L. Batsch) can cause allergic reactions in the worldwide population because of the presence of four classes of allergens (Pru p 1, Pru p 2, Pru p 3, and Pru p 4). Fruit bagging has been widely practiced in peach cultivation to improve fruit quality; however, its effect on the expression of peach allergen-encoding genes remains unknown. In this study, the influence of fruit bagging with opaque paper bags on the major peach allergen-encoding genes, including Pru p 1.01, Pru p 1.06B, Pru p 2.01B, Pru p 2.02, Pru p 3.01, Pru p 4.01, and Pru p 4.02, were measured by means of real-time PCR. A significant reduction in transcript accumulation was observed for all of the selected genes in the epicarps of the bagged peach fruits, whereas slight increases were observed in the mesocarps for these genes, with the two exceptions of Pru p 2.02 and Pru p 3.01. For most of these genes, much higher transcripts were determined in the epicarps than in the mesocarps. Taken together, a significant reduction in the transcription rate of the allergen-encoding genes in the whole peach fruit was achieved by shading with opaque paper bags. According to these data, modifications in growing practices of peach may help to obtain fruits with lower levels of allergens and thus contribute to reducing potential allergenic risks in consumers.
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Affiliation(s)
- Yingtao Ma
- Life Science College , Luoyang Normal University , Luoyang , Henan 471934 , China
| | - Xuejiao Zhao
- Life Science College , Luoyang Normal University , Luoyang , Henan 471934 , China
| | - Hongwei Ren
- Institute of Fruit Science , Luoyang Academy of Agriculture and Forestry , Luoyang , Henan 471000 , China
| | - Hongxia Wu
- South Subtropical Crops Research Institute , Chinese Academy of Tropical Agricultural Sciences , Zhanjiang , Guangdong 524091 , China
| | - Mingxin Guo
- Life Science College , Luoyang Normal University , Luoyang , Henan 471934 , China
| | - Yanzhao Zhang
- Life Science College , Luoyang Normal University , Luoyang , Henan 471934 , China
| | - Zhaojun He
- College of Food and Pharmaceutical Sciences , Luoyang Normal University , Luoyang , Henan 471934 , China
| | - Jianming Han
- Life Science College , Luoyang Normal University , Luoyang , Henan 471934 , China
| | - Ruijian Tong
- Life Science College , Luoyang Normal University , Luoyang , Henan 471934 , China
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18
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Affiliation(s)
- Shikun Ma
- Department of Allergy, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing, People’s Republic of China
| | - Ruiqi Wang
- Department of Allergy, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing, People’s Republic of China
| | - Li Nie
- Beijing Center for Disease Control and Prevention, Beijing, People’s Republic of China
| | - Jia Yin
- Department of Allergy, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing, People’s Republic of China
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19
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Negi SS, Braun W. Cross-React: a new structural bioinformatics method for predicting allergen cross-reactivity. Bioinformatics 2017; 33:1014-1020. [PMID: 28062447 DOI: 10.1093/bioinformatics/btw767] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 12/01/2016] [Indexed: 11/14/2022] Open
Abstract
The phenomenon of cross-reactivity between allergenic proteins plays an important role to understand how the immune system recognizes different antigen proteins. Allergen proteins are known to cross-react if their sequence comparison shows a high sequence identity which also implies that the proteins have a similar 3D fold. In such cases, linear sequence alignment methods are frequently used to predict cross-reactivity between allergenic proteins. However, the prediction of cross-reactivity between distantly related allergens continues to be a challenging task. To overcome this problem, we developed a new structure-based computational method, Cross-React, to predict cross-reactivity between allergenic proteins available in the Structural Database of Allergens (SDAP). Our method is based on the hypothesis that we can find surface patches on 3D structures of potential allergens with amino acid compositions similar to an epitope in a known allergen. We applied the Cross-React method to a diverse set of seven allergens, and successfully identified several cross-reactive allergens with high to moderate sequence identity which have also been experimentally shown to cross-react. Based on these findings, we suggest that Cross-React can be used as a predictive tool to assess protein allergenicity and cross-reactivity. Availability and Implementation : Cross-React is available at: http://curie.utmb.edu/Cross-React.html. Contact ssnegi@utmb.edu.
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20
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Gao ZS, Zhou X, Yang ZW, Versteeg SA, Gao L, Fu WY, Wang HY, Zhou JY, Akkerdaas JH, van Ree R. IgE-binding potencies of three peach Pru p 1 isoforms. Mol Nutr Food Res 2016; 60:2457-2466. [PMID: 27374664 DOI: 10.1002/mnfr.201500798] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 05/12/2016] [Accepted: 06/20/2016] [Indexed: 12/20/2022]
Abstract
SCOPE Pru p 1, the Bet v 1 homologue from peach, has been identified as a clinically relevant allergen. Three isoforms have been described, two in peach fruit (Pru p 1.0101 and Pru p 1.0201) and one in pollen (Pru p 1.0301). The present study aimed to compare their IgE-binding potencies. METHODS AND RESULTS Three Pru p 1 isoforms were cloned and expressed as soluble proteins with His-tags in Escherichia coli. Protein identity was confirmed by MS, circular dichroism, and RNAse activity. IgE-binding capacity using ELISA and ImmunoCAP was compared. Three Pru p 1 isoforms had quite similar IgE-binding potencies for 60% of the sera, but more than twofold between any two isoforms among 40% of the 47 sera. The mean IgE binding of Pru p 1.0201 was slightly higher than other two isoforms. In a sera pool, homologous ImmunoCAP inhibition was higher than other two heterologous isoforms. Individual serum with diverse IgE values of three isoforms demonstrated the higher IgE inhibition of specific isoform with higher IgE value. CONCLUSION A similar and variable pattern of IgE recognition was observed among three Pru p 1 isoforms. The two new isoforms can be used as more accurate diagnostic reagents.
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Affiliation(s)
- Zhong-Shan Gao
- Department of Horticulture, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China.,Allergy Research Center, Zhejiang University, Hangzhou, China
| | - Xiang Zhou
- Department of Horticulture, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Zhao-Wei Yang
- State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Serge A Versteeg
- Department of Experimental Immunology, Academic Medical Center-University of Amsterdam, Amsterdam, The Netherlands
| | - Ling Gao
- Department of Horticulture, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Wan-Yi Fu
- Department of Horticulture, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Hui-Ying Wang
- Department of Allergy, The Second Affiliated Hospital of Zhejiang University, School of Medicine, Hangzhou, China
| | - Jian-Ying Zhou
- Department of Allergy, The First Affiliated Hospital of Zhejiang University, School of Medicine, Hangzhou, China
| | - Jaap H Akkerdaas
- Department of Experimental Immunology, Academic Medical Center-University of Amsterdam, Amsterdam, The Netherlands
| | - Ronald van Ree
- Department of Experimental Immunology, Academic Medical Center-University of Amsterdam, Amsterdam, The Netherlands.,Department of Otorhinolaryngology, Academic Medical Center-University of Amsterdam, Amsterdam, The Netherlands
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21
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Nixon G, Hall L, Wilkes T, Walker M, Burns M. Novel Approach to the Rapid Differentiation of Common <i>Prunus</i> Allergen Species by PCR Product Melt Analysis. ACTA ACUST UNITED AC 2016. [DOI: 10.4236/fns.2016.710091] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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22
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Zhang S, Wang S, Huang J, Lai X, Du Y, Liu X, Li B, Feng R, Yang G. High-specificity quantification method for almond-by-products, based on differential proteomic analysis. Food Chem 2015; 194:522-8. [PMID: 26471588 DOI: 10.1016/j.foodchem.2015.08.056] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 08/11/2015] [Accepted: 08/15/2015] [Indexed: 11/29/2022]
Abstract
A highly specific competitive enzyme-linked immunosorbent assay (ELISA) protocol has been developed to identify and classify almond products based on differential proteomic analysis. We applied two-dimensional electrophoresis to compare the differences between almond and apricot kernels to search for almond-specific proteins. The amino acid of apricot Pru-1 was sequenced and aligned to almond Pru-1. One peptide, RQGRQQGRQQQEEGR, which exists in almond but not in apricot, was used as hapten to prepare monoclonal antibody against almond Pru-1. An optimized ELISA method was established using this antibody. The assay did not exhibit cross-reactivity with the tested apricot kernels and other edible plant seeds. The limit of detection (LOD) was 2.5-100μg/g based on different food samples. The recoveries of fortified samples at levels of twofold and eightfold LOD ranged from 82% to 96%. The coefficients of variation were less than 13.0%. Using 7M urea as extracting solution, the heat-treated protein loss ratios were 2%, 5% and 15% under pasteurization (65°C for 30min), baking (150°C for 30min) and autoclaved sterilization (120°C for 15min), respectively.
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Affiliation(s)
- Shiwei Zhang
- Shenzhen Academy of Metrology and Quality Inspection, Shenzhen 518102, PR China
| | - Shifeng Wang
- Shenzhen Academy of Metrology and Quality Inspection, Shenzhen 518102, PR China
| | - Jingmin Huang
- Shenzhen Academy of Metrology and Quality Inspection, Shenzhen 518102, PR China
| | - Xintian Lai
- Shenzhen Academy of Metrology and Quality Inspection, Shenzhen 518102, PR China
| | - Yegang Du
- Shenzhen Academy of Metrology and Quality Inspection, Shenzhen 518102, PR China
| | - Xiaoqing Liu
- Shenzhen Academy of Metrology and Quality Inspection, Shenzhen 518102, PR China
| | - Bifang Li
- Shenzhen Academy of Metrology and Quality Inspection, Shenzhen 518102, PR China
| | - Ronghu Feng
- Shenzhen Academy of Metrology and Quality Inspection, Shenzhen 518102, PR China
| | - Guowu Yang
- Shenzhen Academy of Metrology and Quality Inspection, Shenzhen 518102, PR China.
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23
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Quantification of Peach Fruit Allergen Lipid Transfer Protein by a Double Monoclonal Antibody-based Sandwich ELISA. FOOD ANAL METHOD 2015. [DOI: 10.1007/s12161-015-0272-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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24
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Brežná B, Šmíd J, Costa J, Radvanszky J, Mafra I, Kuchta T. In silico and experimental evaluation of DNA-based detection methods for the ability to discriminate almond from other Prunus spp. Mol Cell Probes 2014; 29:99-115. [PMID: 25483259 DOI: 10.1016/j.mcp.2014.11.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Revised: 11/26/2014] [Accepted: 11/26/2014] [Indexed: 10/24/2022]
Abstract
Ten published DNA-based analytical methods aiming at detecting material of almond (Prunus dulcis) were in silico evaluated for potential cross-reactivity with other stone fruits (Prunus spp.), including peach, apricot, plum, cherry, sour cherry and Sargent cherry. For most assays, the analysis of nucleotide databases suggested none or insufficient discrimination of at least some stone fruits. On the other hand, the assay targeting non-specific lipid transfer protein (Röder et al., 2011, Anal Chim Acta 685:74-83) was sufficiently discriminative, judging from nucleotide alignments. Empirical evaluation was performed for three of the published methods, one modification of a commercial kit (SureFood allergen almond) and one attempted novel method targeting thaumatin-like protein gene. Samples of leaves and kernels were used in the experiments. The empirical results were favourable for the method from Röder et al. (2011) and a modification of SureFood allergen almond kit, both showing cross-reactivity <10(-3) compared to the model almond.
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Affiliation(s)
- Barbara Brežná
- Department of Microbiology and Molecular Biology, Food Research Institute, Priemyselná 4, P.O. Box 25, 824 75 Bratislava 26, Slovakia.
| | - Jiří Šmíd
- Department of Microbiology and Molecular Biology, Food Research Institute, Priemyselná 4, P.O. Box 25, 824 75 Bratislava 26, Slovakia; Institute of Food Chemistry and Biotechnolgy, Faculty of Chemistry, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic
| | - Joana Costa
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Jan Radvanszky
- Institute of Molecular Physiology and Genetics, Slovak Academy of Sciences, Vlárska 5, 83334 Bratislava, Slovakia
| | - Isabel Mafra
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Tomáš Kuchta
- Department of Microbiology and Molecular Biology, Food Research Institute, Priemyselná 4, P.O. Box 25, 824 75 Bratislava 26, Slovakia
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Scientific Opinion on the evaluation of allergenic foods and food ingredients for labelling purposes. EFSA J 2014. [DOI: 10.2903/j.efsa.2014.3894] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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Ashok Kumar HG, Venkatesh YP. In silico analyses of structural and allergenicity features of sapodilla (Manilkara zapota) acidic thaumatin-like protein in comparison with allergenic plant TLPs. Mol Immunol 2013; 57:119-28. [PMID: 24091295 DOI: 10.1016/j.molimm.2013.08.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 08/14/2013] [Accepted: 08/18/2013] [Indexed: 10/26/2022]
Abstract
Thaumatin-like proteins (TLPs) belong to the pathogenesis-related family (PR-5) of plant defense proteins. TLPs from only 32 plant genera have been identified as pollen or food allergens. IgE epitopes on allergens play a central role in food allergy by initiating cross-linking of specific IgE on basophils/mast cells. A comparative analysis of pollen- and food-allergenic TLPs is lacking. The main objective of this investigation was to study the structural and allergenicity features of sapodilla (Manilkara zapota) acidic TLP (TLP 1) by in silico methods. The allergenicity prediction of composite sequence of sapodilla TLP 1 (NCBI B3EWX8.1, G5DC91.1) was performed using FARRP, Allermatch and Evaller web tools. A homology model of the protein was generated using banana TLP template (1Z3Q) by HHPRED-MODELLER. B-cell linear epitope prediction was performed using BCpreds and BepiPred. Sapodilla TLP 1 matched significantly with allergenic TLPs from olive, kiwi, bell pepper and banana. IgE epitope prediction as performed using AlgPred indicated the presence of 2 epitopes (epitope 1: residues 36-48; epitope 2: residues 51-63), and a comprehensive analysis of all allergenic TLPs displayed up to 3 additional epitopes on other TLPs. It can be inferred from these analyses that plant allergenic TLPs generally carry 2-3 IgE epitopes. ClustalX alignments of allergenic TLPs indicate that IgE epitopes 1 and 2 are common in food allergenic TLPs, and IgE epitopes 2 and 3 are common in pollen allergenic TLPs; IgE epitope 2 overlaps with a portion of the thaumatin family signature. The secondary structural elements of TLPs vary markedly in regions 1 and 2 which harbor all the predicted IgE epitopes in all food and pollen TLPs in either of the region. Further, based on the number of IgE epitopes, food TLPs are grouped into rosid and non-rosid clades. The number and distribution of the predicted IgE epitopes among the allergenic TLPs may explain the specificity of food or pollen allergy as well as the varied degree of cross-reactivity among plant foods and/or pollens.
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Affiliation(s)
- Hassan G Ashok Kumar
- Department of Biochemistry & Nutrition, CSIR - Central Food Technological Research Institute, Mysore 570020, Karnataka, India.
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Pagliarani G, Paris R, Arens P, Tartarini S, Ricci G, Smulders MMJ, van de Weg WE. A qRT-PCR assay for the expression of all Mal d 1 isoallergen genes. BMC PLANT BIOLOGY 2013; 13:51. [PMID: 23522122 PMCID: PMC3616815 DOI: 10.1186/1471-2229-13-51] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Accepted: 03/14/2013] [Indexed: 05/24/2023]
Abstract
BACKGROUND A considerable number of individuals suffer from oral allergy syndrome (OAS) to apple, resulting in the avoidance of apple consumption. Apple cultivars differ greatly in their allergenic properties, but knowledge of the causes for such differences is incomplete. Mal d 1 is considered the major apple allergen. For Mal d 1, a wide range of isoallergens and variants exist, and they are encoded by a large gene family. To identify the specific proteins/genes that are potentially involved in the allergy, we developed a PCR assay to monitor the expression of each individual Mal d 1 gene. Gene-specific primer pairs were designed for the exploitation of sequence differences among Mal d 1 genes. The specificity of these primers was validated using both in silico and in vitro techniques. Subsequently, this assay was applied to the peel and flesh of fruits from the two cultivars 'Florina' and 'Gala'. RESULTS We successfully developed gene-specific primer pairs for each of the 31 Mal d 1 genes and incorporated them into a qRT-PCR assay. The results from the application of the assay showed that 11 genes were not expressed in fruit. In addition, differential expression was observed among the Mal d 1 genes that were expressed in the fruit. Moreover, the expression levels were tissue and cultivar dependent. CONCLUSION The assay developed in this study facilitated the first characterisation of the expression levels of all known Mal d 1 genes in a gene-specific manner. Using this assay on different fruit tissues and cultivars, we obtained knowledge concerning gene relevance in allergenicity. This study provides new perspectives for research on both plant breeding and immunotherapy.
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Affiliation(s)
- Giulia Pagliarani
- Wageningen UR Plant Breeding, Plant Research International, Droevendaalsesteeg 1, Wageningen, PB, 6708, The Netherlands
- Department of Fruit Tree and Woody Plant Sciences, University of Bologna, Viale Fanin 46, Bologna, 40127, Italy
| | - Roberta Paris
- Department of Fruit Tree and Woody Plant Sciences, University of Bologna, Viale Fanin 46, Bologna, 40127, Italy
- Present address: Consiglio per la Ricerca e la sperimentazione in Agricoltura-Centro di Ricerca per le Colture Industriali, via di Corticella 133, Bologna, 40128, Italy
| | - Paul Arens
- Wageningen UR Plant Breeding, Plant Research International, Droevendaalsesteeg 1, Wageningen, PB, 6708, The Netherlands
| | - Stefano Tartarini
- Department of Fruit Tree and Woody Plant Sciences, University of Bologna, Viale Fanin 46, Bologna, 40127, Italy
| | - Giampaolo Ricci
- Department of Paediatrics, University of Bologna, Via Massarenti 11, Bologna, 40138, Italy
| | - Marinus MJ Smulders
- Wageningen UR Plant Breeding, Plant Research International, Droevendaalsesteeg 1, Wageningen, PB, 6708, The Netherlands
| | - W Eric van de Weg
- Wageningen UR Plant Breeding, Plant Research International, Droevendaalsesteeg 1, Wageningen, PB, 6708, The Netherlands
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Giraldo E, Díaz A, Corral JM, García A. Applicability of 2-DE to assess differences in the protein profile between cold storage and not cold storage in nectarine fruits. J Proteomics 2012; 75:5774-82. [PMID: 22926270 DOI: 10.1016/j.jprot.2012.08.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Revised: 07/26/2012] [Accepted: 08/07/2012] [Indexed: 01/11/2023]
Abstract
Cold storage is being used to increase nectarine fruits' postharvest life. However, low temperatures lead to chilling injury and limit their commercial quality and value. In this study a proteomic approach was used to compare the protein profile between control and cold storage nectarine fruits. Protein extracted from tissue was resolved by two-dimensional gel electrophoresis (2-DE) in the 4-7 pH and 10-200 kDa Mr range. Around 350 spots were well determined, and 11 from 17 spots that showed significant differences were identified by peptide mass fingerprinting (PMF) using matrix-assisted laser desorption/ionization (MALDI)-time-of-flight (TOF)-mass spectrometry (MS). Four differentially expressed proteins were characterized as allergens and were further assessed at the transcription level using quantitative real time-RT-PCR (qRT-PCR).
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Affiliation(s)
- E Giraldo
- Proteomics Laboratory, Instituto Tecnológico Agroalimentario de Extremadura (INTAEX), Gobierno de Extremadura, Av/Adolfo Suárez, s/n Aptdo. 20107, C.P. 06071 Badajoz, Spain.
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Costa J, Mafra I, Oliveira MBP. High resolution melting analysis as a new approach to detect almond DNA encoding for Pru du 5 allergen in foods. Food Chem 2012. [DOI: 10.1016/j.foodchem.2012.01.077] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Sherif S, El-Sharkawy I, Paliyath G, Jayasankar S. Differential expression of peach ERF transcriptional activators in response to signaling molecules and inoculation with Xanthomonas campestris pv. pruni. JOURNAL OF PLANT PHYSIOLOGY 2012; 169:731-739. [PMID: 22410465 DOI: 10.1016/j.jplph.2012.02.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Revised: 02/12/2012] [Accepted: 02/14/2012] [Indexed: 05/31/2023]
Abstract
Ethylene response factors (ERFs) are a large family of transcription factors (TFs) that have diverse functions in plant development and immunity. However, very little is known about the molecular regulation of these TFs in stone fruits during disease incidence. In the present study, we describe the identification of five peach ERFs (Pp-ERFs), aiming to elucidate their potential roles in defense against Xanthomonas campestris pv. pruni (Xcp), the causal agent of bacterial spot disease. The phylogenetic analysis along with sequence comparisons indicated that all Pp-ERFs are transcriptional activators belonging to groups IX and IIV ERFs. The transactivation capacity of these proteins was verified in vivo where they all induced the expression of the GUS reporter gene and in a GCC-dependent manner. The nuclear localization was also confirmed for two of these proteins, Pp-ERF2.b and Pp-ERF2.c, after their transient expression in onion epidermal cells. The induction kinetics of Pp-ERFs after inoculation with Xcp was determined by qRT-PCR. Except for Pp-ERF2.b, transcript levels of Pp-ERFs increased strongly and rapidly in the resistant 'Venture' compared to the susceptible 'BabyGold 5' cultivar after infection with Xcp. In contrast, the expression of Pp-ERF2.b was several-fold higher in the susceptible cultivar after bacterial infection. The expression of Pp-ERFs was also monitored after treating with signaling compounds; salicylic acid (SA) (1 mM), ethephon (1 mM) and methyl jasmonate (MeJA) (50 μM). Although the results generally emphasize the role of ethylene/jasmonic acid (ET/JA) signaling pathways in regulating the expression of Pp-ERFs, there was a coordination of the timing of ET/JA responses, suggesting compensatory rather than synergistic interactions between these pathways during defense against Xcp.
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Affiliation(s)
- S Sherif
- Department of Plant Agriculture, University of Guelph, 4890 Victoria Av. N., PO Box 7000 Vineland Station, ON L0R 2E0, Canada
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Sherif S, Paliyath G, Jayasankar S. Molecular characterization of peach PR genes and their induction kinetics in response to bacterial infection and signaling molecules. PLANT CELL REPORTS 2012; 31:697-711. [PMID: 22101723 DOI: 10.1007/s00299-011-1188-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2011] [Accepted: 11/02/2011] [Indexed: 05/11/2023]
Abstract
'Venture' and 'BabyGold 5' are two peach cultivars with a demonstrated resistance and susceptibility, respectively, to bacterial spot disease caused by Xanthomonas campestris pv. pruni (Xcp). To explore the differences between these cultivars at the molecular level, two PR1 (Pp-PR1a, Pp-PR1b) and three PR5 (Pp-TLP1, Pp-TLP2 and Pp-TLP3) genes were isolated from peach (Prunus persica L.) and investigated by in silico and in situ approaches. The analysis of gene expression by qRT-PCR indicated that all PR genes, except Pp-PR1a, were induced to a significantly higher degree in the resistant cultivar. In response to signaling molecules, Pp-PR1a was induced chiefly by SA treatment, while other PR genes were induced mainly by ethephon or MeJA treatments. The induction of the same set of PR genes in response to bacterial infection, MeJA or ethephon suggests the involvement of jasmonic acid (JA)/ethylene (ET)-signaling pathways in mediating resistance against Xcp, which is consistent with the potential hemibiotrophic nature of this bacterium. The identification of binding sites for ERF and MYC2 transcription factors in the promoter of Pp-TLP1 and Pp-TLP2 genes further supported the role of JA/ET pathways in the transcription regulation of these genes. The role of stomata in defense against Xcp was also investigated by measuring stomatal apertures in both 'Venture' and 'BabyGold 5' leaves after 1 and 3 HPI. While most stomata closed in both cultivars within 1 HPI, stomata reopened again at 3 HPI with a higher percentage recorded for 'BabyGold 5', suggesting a potential role of stomata in the susceptibility of this cultivar.
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Affiliation(s)
- S Sherif
- Department of Plant Agriculture, University of Guelph, 4890 Victoria Av. N, P.O. Box 7000, Vineland Station, ON L0R 2E0, Canada
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Watanabe S, Taguchi H, Temmei Y, Hirao T, Akiyama H, Sakai S, Adachi R, Urisu A, Teshima R. Specific detection of potentially allergenic peach and apple in foods using polymerase chain reaction. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:2108-2115. [PMID: 22313353 DOI: 10.1021/jf204926a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Two PCR methods were developed for specific detection of the trnS-trnG intergenic spacer region of Prunus persica (peach) and the internal transcribed spacer region of Malus domestica (apple). The peach PCR amplified a target-size product from the DNA of 6 P. persica cultivars including 2 nectarine and 1 flat peach cultivar, but not from those of 36 nontarget species including 6 Prunus and 5 other Rosaceae species. The apple PCR amplified a target-size product from the DNA of 5 M. domestica cultivars, but not from those of 41 nontarget species including 7 Maloideae and 9 other Rosaceae species. Both methods detected the target DNA from strawberry jam and cookies spiked with peach and apple at a level equivalent to about 10 μg of total soluble proteins of peach or apple per gram of incurred food. The specificity and sensitivity were considered to be sufficient for the detection of trace amounts of peach or apple contamination in processed foods.
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Affiliation(s)
- Satoshi Watanabe
- Somatech Center, House Foods Corporation, Yotsukaido, Chiba, Japan.
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Pagliarani G, Paris R, Iorio AR, Tartarini S, Del Duca S, Arens P, Peters S, van de Weg E. Genomic organisation of the Mal d 1 gene cluster on linkage group 16 in apple. MOLECULAR BREEDING : NEW STRATEGIES IN PLANT IMPROVEMENT 2012; 29:759-778. [PMID: 22408383 PMCID: PMC3285766 DOI: 10.1007/s11032-011-9588-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2010] [Accepted: 05/14/2011] [Indexed: 05/29/2023]
Abstract
European populations exhibit progressive sensitisation to food allergens, and apples are one of the foods for which sensitisation is observed most frequently. Apple cultivars vary greatly in their allergenic characteristics, and a better understanding of the genetic basis of low allergenicity may therefore allow allergic individuals to increase their fruit intake. Mal d 1 is considered to be a major apple allergen, and this protein is encoded by the most complex allergen gene family. Not all Mal d 1 members are likely to be involved in allergenicity. Therefore, additional knowledge about the existence and characteristics of the different Mal d 1 genes is required. In the present study, we investigated the genomic organisation of the Mal d 1 gene cluster in linkage group 16 of apple through the sequencing of two bacterial artificial chromosome clones. The results provided new information on the composition of this family with respect to the number and orientation of functional and pseudogenes and their physical distances. The results were compared with the apple and peach genome sequences that have recently been made available. A broad analysis of the whole apple genome revealed the presence of new genes in this family, and a complete list of the observed Mal d 1 genes is supplied. Thus, this study provides an important contribution towards a better understanding of the genetics of the Mal d 1 family and establishes the basis for further research on allelic diversity among cultivars in relation to variation in allergenicity. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s11032-011-9588-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Giulia Pagliarani
- Department of Fruit Tree and Woody Plant Sciences, University of Bologna, Viale Fanin 46, 40127 Bologna, Italy
- Plant Breeding, Plant Research International, Wageningen University and Research Center, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - Roberta Paris
- Department of Fruit Tree and Woody Plant Sciences, University of Bologna, Viale Fanin 46, 40127 Bologna, Italy
| | - Anna Rosa Iorio
- Department of Biology es, University of Bologna, Via Irnerio 42, 40126 Bologna, Italy
| | - Stefano Tartarini
- Department of Fruit Tree and Woody Plant Sciences, University of Bologna, Viale Fanin 46, 40127 Bologna, Italy
| | - Stefano Del Duca
- Department of Biology es, University of Bologna, Via Irnerio 42, 40126 Bologna, Italy
| | - Paul Arens
- Plant Breeding, Plant Research International, Wageningen University and Research Center, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - Sander Peters
- Greenomics, Plant Research International, Wageningen University and Research Center, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - Eric van de Weg
- Plant Breeding, Plant Research International, Wageningen University and Research Center, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
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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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The Y-segment of novel cold dehydrin genes is conserved and codons in the PR-10 genes are under positive selection in Oxytropis (Fabaceae) from contrasting climates. Mol Genet Genomics 2011; 287:123-42. [DOI: 10.1007/s00438-011-0664-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2011] [Accepted: 12/01/2011] [Indexed: 10/14/2022]
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Zhang L, Yu Z, Jiang L, Jiang J, Luo H, Fu L. Effect of post-harvest heat treatment on proteome change of peach fruit during ripening. J Proteomics 2011; 74:1135-49. [PMID: 21550427 DOI: 10.1016/j.jprot.2011.04.012] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Revised: 03/30/2011] [Accepted: 04/14/2011] [Indexed: 12/28/2022]
Abstract
The extracted proteins from the heat-treated peach fruit (dipped in hot water at 48°C for 10min and then stored at room temperature (20°C-25°C) for up to 6 days) were used for proteomic analysis in order to understand the response of post-harvest peach fruit to heat treatment during ripening stage at proteomic level. After two dimensional gels electrophoresis (2-DE) was conducted, more than 600 protein spots were detected. Among them, 35 differently expressed spots (P<0.05) were selected to be excised and analyzed using MALDI-TOF/TOF, and finally 30 protein spots were confidently identified according to NCBI database. The results demonstrated that among the thirty protein spots expressed particularly induced by heat treatment, 43% were related to stress response, 17% to cell structure, 13% to protein fate, 7% to glycolytic pathway, 3% to ripening and senescence and 17% to unclassified. All of them are involved in the regulation of peach fruit development and ripening. All these indicated that the self-defense capability of peach fruit was improved by heat treatment. The study will enable future detailed investigation of gene expression and function linked with peach fruit ripening.
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Affiliation(s)
- Li Zhang
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
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Palacín A, Tordesillas L, Gamboa P, Sanchez-Monge R, Cuesta-Herranz J, Sanz ML, Barber D, Salcedo G, Díaz-Perales A. Characterization of peach thaumatin-like proteins and their identification as major peach allergens. Clin Exp Allergy 2011; 40:1422-30. [PMID: 20701616 DOI: 10.1111/j.1365-2222.2010.03578.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Peach is the most important fruit related to food allergy in the Mediterranean area. Pru p 3, its lipid transfer protein, has been described as the principal allergen responsible for cross-reactivities with other foods and pollen and the severity of clinical symptoms. However, the involvement of other allergenic families cannot be ruled out. Thaumatin-like proteins (TLPs) have been described as food allergen in several fruits, such as apple, cherry, kiwi and banana, and pollen. OBJECTIVE To identify members of the TLP family in peach fruit and to characterize putative allergens. METHODS Through two-dimensional (2D) electrophoresis of peach extract and immunodetections with a pool of peach-allergic patients, IgE-binding spots were identified and the corresponding proteins purified and characterized as allergens by in vitro and in vivo assays. Three isoforms, belonging to the TLP family, were purified by different chromatographic systems and characterized by N-terminal amino acid sequences, molecular weight determination (MALDI) and enzymatic activity analysis (beta-1,3-gluconase test and inhibition growth of fungi). In the same way, their IgE-binding capacity and allergenic activity were tested by ELISA assays, basophil activation tests and skin prick tests (SPT). RESULTS Two peach-TLPs, Pru p 2.0101 and Pru p 2.0201, were identified as IgE-binding spots by 2D electrophoresis. Another peach-TLP, Pru p 2.0301, was cloned and produced as recombinant protein in a yeast system. The three isoforms were purified and characterized as TLPs by immunoblotting with anti-chestnut TLP antibodies and anti-plant N-asparagine complex glycan (anti-cross-reactive carbohydrate determinant). All of them showed beta-1,3-glucanase activity and inhibition of fungal growth. The three TLPs were recognized by around 50% of the sera from 31 patients analysed in ELISA experiments. All three gave a positive response to an SPT and/or in basophil activation experiments. CONCLUSION Three isoforms, belonging to the TLP family, were identified in peach as principal allergens. Their prevalence, observed in in vitro, ex vivo and in vivo analyses, suggests that they are important allergens and should therefore be included in the routine diagnosis of peach allergy, at least in the Mediterranean area.
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Affiliation(s)
- A Palacín
- Unidad de Bioquímica, Departamento de Biotecnología, E.T.S. Ingenieros Agrónomos, UPM, Madrid, Spain
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Lebel S, Schellenbaum P, Walter B, Maillot P. Characterisation of the Vitis vinifera PR10 multigene family. BMC PLANT BIOLOGY 2010; 10:184. [PMID: 20727162 PMCID: PMC3095314 DOI: 10.1186/1471-2229-10-184] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2010] [Accepted: 08/20/2010] [Indexed: 05/21/2023]
Abstract
BACKGROUND Genes belonging to the pathogenesis related 10 (PR10) group have been studied in several plant species, where they form multigene families. Until now, such an analysis has not been performed in Vitis vinifera, although three different PR10 genes were found to be expressed under pathogen attack or abiotic stress, and during somatic embryogenesis induction. We used the complete genome sequence for characterising the whole V. vinifera PR10 gene family. The expression of candidate genes was studied in various non-treated tissues and following somatic embryogenesis induction by the auxin 2,4-D. RESULTS In addition to the three V. vinifera PR10 genes already described, namely VvPR10.1, VvPR10.2 and VvPR10.3, fourteen different PR10 related sequences were identified. Showing high similarity, they form a single cluster on the chromosome 5 comprising three pseudogenes. The expression of nine different genes was detected in various tissues. Although differentially expressed in non-treated plant organs, several genes were up-regulated in tissues treated with 2,4-D, as expected for PR genes. CONCLUSIONS PR10 genes form a multigene family in V. vinifera, as found in birch, apple or peach. Seventeen closely related PR10 sequences are arranged in a tandem array on the chromosome 5, probably reflecting small-scale duplications during evolution. Various expression patterns were found for nine studied genes, highlighting functional diversification. A phylogenetic comparison of deduced proteins with PR10 proteins of other plants showed a characteristic low intraspecific variability. Particularly, a group of seven close tandem duplicates including VvPR10.1, VvPR10.2 and VvPR10.3 showed a very high similarity, suggesting concerted evolution or/and recent duplications.
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Affiliation(s)
- Sylvain Lebel
- Université de Haute Alsace, Laboratoire Vigne, Biotechnologies & Environnement, 33 rue de Herrlisheim, BP 50568, 68 008, Colmar Cedex, France
| | - Paul Schellenbaum
- Université de Haute Alsace, Laboratoire Vigne, Biotechnologies & Environnement, 33 rue de Herrlisheim, BP 50568, 68 008, Colmar Cedex, France
| | - Bernard Walter
- Université de Haute Alsace, Laboratoire Vigne, Biotechnologies & Environnement, 33 rue de Herrlisheim, BP 50568, 68 008, Colmar Cedex, France
| | - Pascale Maillot
- Université de Haute Alsace, Laboratoire Vigne, Biotechnologies & Environnement, 33 rue de Herrlisheim, BP 50568, 68 008, Colmar Cedex, France
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Zubini P, Zambelli B, Musiani F, Ciurli S, Bertolini P, Baraldi E. The RNA hydrolysis and the cytokinin binding activities of PR-10 proteins are differently performed by two isoforms of the Pru p 1 peach major allergen and are possibly functionally related. PLANT PHYSIOLOGY 2009; 150:1235-47. [PMID: 19474212 PMCID: PMC2705045 DOI: 10.1104/pp.109.139543] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2009] [Accepted: 05/19/2009] [Indexed: 05/20/2023]
Abstract
PR-10 proteins are a family of pathogenesis-related (PR) allergenic proteins playing multifunctional roles. The peach (Prunus persica) major allergen, Pru p 1.01, and its isoform, Pru p 1.06D, were found highly expressed in the fruit skin at the pit hardening stage, when fruits transiently lose their susceptibility to the fungal pathogen Monilinia spp. To investigate the possible role of the two Pru p 1 isoforms in plant defense, the recombinant proteins were expressed in Escherichia coli and purified. Light scattering experiments and circular dichroism spectroscopy showed that both proteins are monomers in solution with secondary structures typical of PR-10 proteins. Even though the proteins do not display direct antimicrobial activity, they both act as RNases, a function possibly related to defense. The RNase activity is different for the two proteins, and only that of Pru p 1.01 is affected in the presence of the cytokinin zeatin, suggesting a physiological correlation between Pru p 1.01 ligand binding and enzymatic activity. The binding of zeatin to Pru p 1.01 was evaluated using isothermal titration calorimetry, which provided information on the stoichiometry and on the thermodynamic parameters of the interaction. The structural architecture of Pru p 1.01 and Pru p 1.06D was obtained by homology modeling, and the differences in the binding pockets, possibly accounting for the observed difference in binding activity, were evaluated.
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Affiliation(s)
- Paola Zubini
- Department of Agri-Food Protection and Improvement, CRIOF , University of Bologna, 40127 Bologna, Italy
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Wu SB, Tavassolian I, Rabiei G, Hunt P, Wirthensohn M, Gibson JP, Ford CM, Sedgley M. Mapping SNP-anchored genes using high-resolution melting analysis in almond. Mol Genet Genomics 2009; 282:273-81. [PMID: 19526371 DOI: 10.1007/s00438-009-0464-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2009] [Accepted: 05/29/2009] [Indexed: 10/20/2022]
Abstract
Peach and almond have been considered as model species for the family Rosaceae and other woody plants. Consequently, mapping and characterisation of genes in these species has important implications. High-resolution melting (HRM) analysis is a recent development in the detection of SNPs and other markers, and proved to be an efficient and cost-effective approach. In this study, we aimed to map genes corresponding to known proteins in other species using the HRM approach. Prunus unigenes were searched and compared with known proteins in the public databases. We developed single-nucleotide polymorphism (SNP) markers, polymorphic in a mapping population produced from a cross between the cloned cultivars Nonpareil and Lauranne. A total of 12 SNP-anchored putative genes were genotyped in the population using HRM, and mapped to an existing linkage map. These genes were mapped on six linkage groups, and the predicted proteins were compared to putative orthologs in other species. Amongst those genes, four were abiotic stress-responsive genes, which can provide a starting point for construction of an abiotic resistance map. Two allergy and detoxification related genes, respectively, were also mapped and analysed. Most of the investigated genes had high similarities to sequences from closely related species such as apricot, apple and other eudicots, and these are putatively orthologous. In addition, it was shown that HRM can be an effective means of genotyping populations for the purpose of constructing a linkage map. Our work provides basic genomic information for the 12 genes, which can be used for further genetic and functional studies.
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Affiliation(s)
- Shu-Biao Wu
- School of Environmental and Rural Science and The Institute of Genetics and Bioinformatics, The University of New England, NSW, Australia.
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Maghuly F, Marzban G, Laimer M. Functional genomics of allergen gene families in fruits. Nutrients 2009; 1:119-32. [PMID: 22253972 PMCID: PMC3257604 DOI: 10.3390/nu1020119] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2009] [Accepted: 10/21/2009] [Indexed: 12/19/2022] Open
Abstract
Fruit consumption is encouraged for health reasons; however, fruits may harbour a series of allergenic proteins that may cause discomfort or even represent serious threats to certain individuals. Thus, the identification and characterization of allergens in fruits requires novel approaches involving genomic and proteomic tools. Since avoidance of fruits also negatively affects the quality of patients' lives, biotechnological interventions are ongoing to produce low allergenic fruits by down regulating specific genes. In this respect, the control of proteins associated with allergenicity could be achieved by fine tuning the spatial and temporal expression of the relevant genes.
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Affiliation(s)
- Fatemeh Maghuly
- Plant Biotechnology Unit, IAM, Department of Biotechnology, VIBT BOKU, 1190 Vienna, Austria.
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