Protein Allergens, Toxins, and Bioinformatics Committee (PATB)

 

Protein Allergens, Toxins, and Bioinformatics

Mission Statement

The PATB is committed to advancing the scientific understanding of the relevant parameters defining allergenic proteins and protein toxins, and to encourage the development of reliable and accurate methodologies for characterizing the allergenic potential of novel proteins in order to leverage the potential of bioinformatics approaches in accomplishing these efforts.

Renaming the Committee: PATC to PATB

Formerly the Protein Allergenicity Technical Committee (PATC), the Committee has adopted a new designation (Protein Allergens, Toxins and Bioinformatics [PATB] Committee) to embrace a broader scope, expertise, interests, and collaborators in the fields of bioinformatics and protein toxins, while strengthening its core focus in allergenicity.

Committee Contacts

HESI Staff

Lucilia Mouries, PhD
lmouries@hesiglobal.org

 Lauren Peel
lpeel@hesiglobal.org

Leadership Team

Greg Ladics, PhD
E.I. DuPont de Nemours and Company

Scott McClain, PhD
Syngenta

Ronald van Ree, PhD
Academic Medical Center, Amsterdam University

Members and Fact Sheet

Committee Events

Events From 2030-12-01—2015-01-01

PATC Non-IgE Mediated Immune Reactions to Foods Workshop

Rome, Italy

This workshop provided an opportunity to discuss the current state of the science in immunologic mechanisms of non-IgE mediated food allergy with a specific emphasis on use of these data to assess food safety.

Read more

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				FAAM Workshop Logo_revised large 4
			
						REGISTRATION HERE
					
			
						DRAFT MEETING AGENDA
					
	

Details
Location: Tivoli Hotel and Congress Center - Copenhagen, Denmark
Dates: October 17 - 18, 2018

There will also be another meeting at the Tivoli Hotel and Congress Center in Copenhagen, Denmark, called FAAM 2018, a EAACI Focused Meeting. FAAM 2018 will take place from 18 -20 October 2018. Please consider attending both events! Find more information on the event here.

About
In the growing field of allergy research, scientists can approach protein characterization and allergy hazard assessment in diverse ways. The Health and Environmental Sciences Institute (HESI) Protein Allergens, Toxins, and Bioinformatics (PATB) committee supports original basic research that seeks to uncover the interplay between protein allergenicity and the physicochemical properties of allergenic proteins. The PATB also oversees the creation, maintenance and distribution of the Comprehensive Protein Allergen Resource (COMPARE) Database whose use in conjunction bioinformatic tools, offers an effective means for assessing allergenic potential of novel food proteins.  PATB’s focus on basic allergy research, coupled with bioinformatic methods for allergenic hazard assessment is unique within the scientific community as it supports an ever-increasing awareness of allergenicity among consumers and regulators. Topics to be covered in this workshop will include historic aspects of food allergy assessment, the evolution of bioinformatics as it relates to allergy assessment, and recent changes in regulations regarding novel food proteins.

This educational workshop will cover advances in protein allergy research and inform the use of novel approaches for the identification of potential food allergens. This event will be of interest to government regulators, those involved in food allergy and celiac disease research, and scientists involved in food safety and risk assessment.

dreamstime_xl_71979237

 

Objectives

Evaluate bioinformatics approaches to characterize the allergenicity potential of novel proteins and inform allergy safety assessment.

Discuss real-world examples of: 1) a product development case-study describing the utility of bioinformatics in protein characterization, and 2) a practical application of the EFSA 2017 Guidance.

Provide insights from new research, ranging from modifications of allergen epitopes at the single amino-acid level, to using protein structural modeling for allergenicity prediction, to the relation between enzymes and allergenic activity.

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Committee Publications

All Publications

Variation in Seed Allergen Content From Three Varieties of Soybean Cultivated in Nine Different Locations in Iowa, Illinois, and Indiana

Soybean (Glycine max) is an important food stock, and also considered an allergenic food with at least eight well characterized allergens. However, it is a less prevalent allergen source than many other foods and is rarely life-threatening. Soybean is incorporated into commonly consumed foods, and therefore, the allergens pose a potential concern for individuals already sensitized. The protein profile of soybean can be affected by several factors including genetic and environmental. To investigate how soybean allergen content may be affected by genetics and/or environment, nine soy allergens were quantified from three commercial soybean varieties grown at nine locations in three states within a single climate zone in North America; Iowa, Illinois, and Indiana, United States. Quantitation was achieved using liquid chromatography-selected reaction monitoring (LC-SRM) tandem mass spectrometry with AQUA peptide standards specific to the nine target allergens.

Read more

Functional classification of protein toxins as a basis for bioinformatic screening

Proteins are fundamental to life and exhibit a wide diversity of activities, some of which are toxic. Therefore, assessing whether a specific protein is safe for consumption in foods and feeds is critical. Simple BLAST searches may reveal homology to a known toxin, when in fact the protein may pose no real danger.

Read more

Inter-laboratory optimization of protein extraction, separation, and fluorescent detection of endogenous rice allergens

In rice, several allergens have been identified such as the non-specific lipid transfer protein-1, the α-amylase/trypsin-inhibitors, the α-globulin, the 33 kDa glyoxalase I (Gly I), the 52–63 kDa globulin, and the granule-bound starch synthetase. The goal of the present study was to define optimal rice extraction and detection methods that would allow a sensitive and reproducible measure of several classes of known rice allergens. In a three-laboratory ring-trial experiment, several protein extraction methods were first compared and analyzed by 1D multiplexed SDS-PAGE. In a second phase, an inter-laboratory validation of 2D-DIGE analysis was conducted in five independent laboratories, focusing on three rice allergens (52 kDa globulin, 33 kDa glyoxalase I, and 14–16 kDa α-amylase/trypsin inhibitor family members). The results of the present study indicate that a combination of 1D multiplexed SDS-PAGE and 2D-DIGE methods would be recommended to quantify the various rice allergens.

Please click here to view this open access publication.

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Assessment of potential adjuvanticity of Cry proteins

Genetically modified (GM) crops have achieved success in the marketplace and their benefits extend beyond the overall increase in harvest yields to include lowered use of insecticides and decreased carbon dioxide emissions. The most widely grown GM crops contain gene/s for targeted insect protection, herbicide tolerance, or both. Plant expression of Bacillus thuringiensis (Bt) crystal (Cry) insecticidal proteins have been the primary way to impart insect resistance in GM crops. Although deemed safe by regulatory agencies globally, previous studies have been the basis for discussions around the potential immuno-adjuvant effects of Cry proteins. These studies had limitations in study design. The studies used animal models with extremely high doses of Cry proteins, which when given using the ig route were co-administered with an adjuvant. Although the presumption exists that Cry proteins may have immunostimulatory activity and therefore an adjuvanticity risk, the evidence shows that Cry proteins are expressed at very low levels in GM crops and are unlikely to function as adjuvants. This conclusion is based on critical review of the published literature on the effects of immunomodulation by Cry proteins, the history of safe use of Cry proteins in foods, safety of the Bt donor organisms, and pre-market weight-of-evidence-based safety assessments for GM crops.

Read more

Genetic Basis and Detection of Unintended Effects in Genetically Modified Crop Plants

In January 2014, an international meeting sponsored by the International Life Sciences Institute/Health and Environmental Sciences Institute and the Canadian Food Inspection Agency titled “Genetic Basis of Unintended Effects in Modified Plants” was held in Ottawa, Canada, bringing together over 75 scientists from academia, government, and the agro-biotech industry.

Read more

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