Protein Allergens, Toxins, and Bioinformatics (PATB) Committee

 

Protein Allergens, Toxins, and Bioinformatics (PATB) Committee

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

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

Filter

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
					
			
						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.

Introduction

Overview of contributions and research of the HESI PATB to Bioinformatics Analysis of the Potential Allergenicity of Novel Proteins
Greg Ladics, Dupont (Download Presentation)

 

Session I: Bioinformatics Approaches to Protein Characterization and Allergy Safety Assessment
A history of bioinformatics: development of in silico approaches to evaluate food proteins 
Andre Silvanovich, Bayer Crop Science (Download Presentation) Protein sequence analysis tools and resources to detect potential allergens
Rob Finn, European Bioinformatics Institute (EBI) (Download Presentation) Case Study: Allergenic risk of insect proteins
Kitty Verhoeckx, TNO (Download Presentation) The COMPARE Allergen Database: a public, comprehensive protein allergen resource for allergenicity safety assessment
Lars Poulsen, University of Copenhagen (Download Presentation) Novel methods to identify allergenicity potential of proteins
Sebastian Maurer-Stroh, A*STAR Bioinformatics Institute (BII), Singapore (Download Presentation)

 

Session II: Other Considerations for Allergen Safety Assessment

The PATB “Allergen Rebuild Project”: can the conservative replacement of amino acids in an allergen epitope affect IgE binding and cross-reactivity?
Ronald van Ree, Academic Medical Center, University of Amsterdam Development of a Random Forest model for predicting allergenicity of new and modified proteins
Tanja Krone, TNO Cross-reactive carbohydrate determinants and allergenicity 
Edzard Spillner, Aarhus University (Download Presentation)

 

Session III: Non-IgE Mediated Allergy

Overview of known non-IgE mediated diseases and progress in immunology of non-IgE diseases
Antonella Cianferoni, Children’s Hospital of Philadelphia (Download Presentation) In silico tools to predict potential celiac disease toxicity 
Frits Koning, Leiden University (Download Presentation) Application of EFSA 2017 bioinformatic guidance for non-IgE mediated immune disease
Andre Silvanovich, Bayer Crop Science (Download Presentation) Considerations for small peptide analyses in SGF
Scott McClain, Syngenta (Download Presentation) [post_title] => Bioinformatics approaches to assess safety of novel proteins in relation to food hypersensitivity [post_excerpt] => [post_status] => publish [comment_status] => closed [ping_status] => closed [post_password] => [post_name] => bioinformatics-approaches-to-assess-safety-of-novel-proteins-in-relation-to-food-hypersensitivity [to_ping] => [pinged] => [post_modified] => 2019-05-03 07:46:57 [post_modified_gmt] => 2019-05-03 12:46:57 [post_content_filtered] => [post_parent] => 0 [guid] => http://hesiglobal.org/?post_type=event&p=7223 [menu_order] => 0 [post_type] => event [post_mime_type] => [comment_count] => 0 [filter] => raw ) [2] => WP_Post Object ( [ID] => 21115 => 105 => 2019-05-03 09:16:08 [post_date_gmt] => 2019-05-03 14:16:08 [post_content] => PATB Webinar Header REGISTER HERE

 

The Health and Environmental Sciences Institute (HESI) Protein Allergens, Toxins, and Bioinformatics (PATB) committee will be hosting a webinar to discuss emerging opportunities and innovations in the biotechnology and food safety assessment arenas. See details below!

Details

  • Date: Wednesday, May 22, 2019
  • Time: 11 AM - 12:30 PM EST
  • Registration: Click here to register.
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Speakers:

  • Scott McClain, Regulatory Product Safety Scientist, Syngenta Crop Protection (USA), PATB Committee Co-Chair
  • Lars Poulsen, Head of Research, Allergy Clinic, Copenhagen University Hospital at Gentofte (Denmark), Member of the COMPARE Database Peer-Review Expert Panel

Advances in agricultural and food biotechnology bring the opportunity to improve the way we grow food and feed crops. As part of the requirements to ensure food safety, it is vital to mitigate potential risks of introducing new allergens or unintended components in the food chain that could induce adverse reactions in humans.

The Health and Environmental Sciences Institute (HESI) Protein Allergens, Toxins, and Bioinformatics (PATB) committee engages international collaborative teams of academics, clinicians, regulators, and industry scientists who conduct research, design and populate public database resources, and convene trainings on the use and evaluation of biotechnology products.  The PATB 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. 

Webinar attendees will:

  • Learn directly from experts in the committee about the nuts and bolts of food safety assessment of biotechnology products, the committee contributions to the field and new emerging issues
  • Engage in an interactive discussion about emerging opportunities, challenges, and innovations in the biotechnology and food safety assessment arenas
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Committee Publications

All Publications

Protease resistance of food proteins: a mixed picture for predicting allergenicity but a useful tool for assessing exposure

Susceptibility to pepsin digestion of candidate transgene products is regarded an important parameter in the weight-of-evidence approach for allergenicity risk assessment of genetically modified crops. It has been argued that protocols used for this assessment should better reflect physiological conditions encountered in representative food consumption scenarios.

Read more

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.

Read more

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

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