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 encouraging 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, the 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.

Call for Participants!

New Project on Organoids as NAMs for Celiac Disease Modeling

The Protein Allergens, Toxins and Bioinformatics (PATB) Committee is seeking partners to help launch a new project to advance methods for the assessment of gluten-like peptide sequences that could trigger Celiac disease (CD). The proposed pilot study will test the potential of microbial derived peptides to mimic gluten peptides using organoid models.

The project will have relevance for those involved in the evaluation of genetically modified crops, novel foods, or proteins (e.g., for food ingredients) produced via precision fermentation or microbial production systems as well as those with an interest in NAMs for food safety and clinicians/researchers involved in the study of Celiac Disease pathology and immunology.

By involving in vitro NAMs and patient derived materials to generate CD-organoids, this study is anticipated to generate both biological and methodological advancements. We are seeking additional financial support and expertise to ensure that the design and impact of the study is optimized. Your involvement will be enhanced by significant contributions in-kind by a clinical collaborator from Harvard University with expertise in developing these in vitro organoid systems! Peptides will be generated this fall and bench work to launch in early 2024.

As with all HESI projects, the success and impact of this initiative will depend on engaging thought leaders and international stakeholders, from government regulators to clinicians, to crop protection, food biotechnology, and biomedical industry experts, academics, and representatives from other relevant organizations.

Interested in finding out more?

Please contact Dr. Lucilia Mouriès at lmouries@hesiglobal.org

Project Background

Current risk assessment approaches for novel foods include amino acid sequence comparison searches, with comparisons being made to approximately 70 known 9-amino acid celiac epitopes.

However, sequence comparisons have shortcomings. Matching of novel proteins to known celiac epitopes can lead to high false positive rates; for example, many common proteins such as zeins, kafirins, and legumins as well as proteins found in pigs and cows have at least one celiac peptide match.

Furthermore, it has been proposed that changes in the Human gut microbiota can promote CD development in genetically susceptible individuals. A number of microbially derived peptides that share sequence similarities to HLA-DQ2.5-restricted gliadin determinants known to be associated with CD have been identified and shown to activate disease-relevant, gliadin-reactive T-cells isolated from CD patients. Yet, activation of T-cells in the gut is a downstream step in the cascade of events for CD. It is unknown if such peptides, when ingested as foods would pass the intestinal barrier, and reach the T-cells in the gut.

In order to reflect the clinical scenario more wholistically, we propose the use of patient-derived human gut organoids as a model system to determine the celiac potential of a protein containing a single putative CD epitope. Organoids are ideal for this use because they replicate many features of clinical disease in a disease-relevant human in vitro model system.

Working Groups

  • Digestibility Working Group: Food Matrix Project

    This research project aims to study the impact of food matrices on the digestibility of proteins and complements the work completed on digestibility in vitro models, by testing whether protocols that take matrices into account would provide a better discrimination of allergens and nonallergens than protocols focusing on purified proteins in solution. In 2020, the experimental work was concluded. The data are being analyzed and a publication is planned in 2021.

  • Protein Toxins Task Force

    The goals of the task force are to (1) investigate approaches for identifying protein toxins and (2) suggest specific guidelines to identify new protein toxins. In 2019, the task force undertook a literature review to identify current approaches being used and leading experts in the topic to design the workshop held in 2020. The workshop covered recent advances in protein toxins biology, described the use of computational biology for protein toxins identification and characterization with in silico approaches, and discussed the applicability of existing tools and resources for safety assessment of novel food biotechnology products.

  • Immunogenicity

    This working group aims to examine application of an in vitro protocol for identifying specific T-cells and antibodies from nonallergic and allergic patients to pairs of proteins from the same protein family but with different allergenicity. After some delays in the anticipated start date due to the COVID-19 pandemic, the project officially received the green light from the leading institution, Copenhagen University Hospital at Gentofte (Copenhagen, Denmark) in late 2020.

  • COMPARE Allergen Database

    Development and annual update of a database of protein allergen sequences is ongoing. The eighth version of the database was released in January 2024. Throughout the year, the team re-initiates and conducts the 10-month-long process leading to the next annual update of the COMPARE Database. Visit COMPARE at https://comparedatabase.org for more details.

HESI Staff

Leadership Team

  • Ronald van Ree, PhD

    Academic Medical Center, University of Amsterdam

  • Andre Silvanovich, PhD

    Bayer CropScience

Committee Events

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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] => 2020-10-28 15:19:22 [post_modified_gmt] => 2020-10-28 15:19:22 [post_content_filtered] => [post_parent] => 0 [guid] => https://hesiglobal.org/?post_type=event&p=7223 [menu_order] => 0 [post_type] => event [post_mime_type] => [comment_count] => 0 [filter] => raw ) ) [post_count] => 1 [current_post] => -1 [before_loop] => [in_the_loop] => [post] => WP_Post Object ( [ID] => 7223 [post_author] => 12 [post_date] => 2018-07-23 16:18:23 [post_date_gmt] => 2018-07-23 21:18:23 [post_content] => 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] => 2020-10-28 15:19:22 [post_modified_gmt] => 2020-10-28 15:19:22 [post_content_filtered] => [post_parent] => 0 [guid] => https://hesiglobal.org/?post_type=event&p=7223 [menu_order] => 0 [post_type] => event [post_mime_type] => [comment_count] => 0 [filter] => raw ) [comment_count] => 0 [current_comment] => -1 [found_posts] => 1 [max_num_pages] => 1 [max_num_comment_pages] => 0 [is_single] => [is_preview] => [is_page] => [is_archive] => 1 [is_date] => [is_year] => [is_month] => [is_day] => [is_time] => [is_author] => [is_category] => [is_tag] => 1 [is_tax] => [is_search] => [is_feed] => [is_comment_feed] => [is_trackback] => [is_home] => [is_privacy_policy] => [is_404] => [is_embed] => [is_paged] => [is_admin] => [is_attachment] => [is_singular] => [is_robots] => [is_favicon] => [is_posts_page] => [is_post_type_archive] => [query_vars_hash:WP_Query:private] => e0222b70ca3b84f61f0b698396f0bc2b [query_vars_changed:WP_Query:private] => 1 [thumbnails_cached] => [allow_query_attachment_by_filename:protected] => [stopwords:WP_Query:private] => [compat_fields:WP_Query:private] => Array ( [0] => query_vars_hash [1] => query_vars_changed ) [compat_methods:WP_Query:private] => Array ( [0] => init_query_flags [1] => parse_tax_query ) )

Committee Publications

A Multi-Laboratory Evaluation of a Common In Vitro Pepsin Digestion Assay Protocol Used in Assessing the Safety of Novel Proteins

Evaluation of the potential allergenicity of proteins derived from genetically modified foods has involved a weight of evidence approach that incorporates an evaluation of protein digestibility in pepsin.

Read more

Agricultural Biotechnology Safety Assessment

Genetically modified (GM) crops were first introduced to farmers in 1995 with the intent to provide better crop yield and meet the increasing demand for food and feed.

Read more

Allergic Sensitization: Food- and Protein-Related Factors

Presented here are emerging capabilities to precisely measure endogenous allergens in soybean and maize, consideration of food matrices on allergens, and proteolytic activity of allergens.

Read more

Allergic Sensitization: Host-Immune Factors

Allergic sensitization is the outcome of a complex interplay between the allergen and the host in a given environmental context.

Read more

Allergic Sensitization: Screening Methods

Experimental in silico, in vitro, and rodent models for screening and predicting protein sensitizing potential are discussed, including whether there is evidence of new sensitizations and allergies since the introduction of genetically modified crops in 1996, the importance of linear versus conformational epitopes, and ...

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 ...

Read more

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